mirror of
https://github.com/UberGames/lilium-voyager.git
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1805 lines
43 KiB
C
1805 lines
43 KiB
C
/*
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===========================================================================
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Copyright (C) 1999-2005 Id Software, Inc.
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This file is part of Quake III Arena source code.
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Quake III Arena source code is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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Quake III Arena source code is distributed in the hope that it will be
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useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Quake III Arena source code; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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===========================================================================
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*/
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#include "cm_local.h"
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#include "cm_patch.h"
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/*
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This file does not reference any globals, and has these entry points:
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void CM_ClearLevelPatches( void );
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struct patchCollide_s *CM_GeneratePatchCollide( int width, int height, const vec3_t *points );
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void CM_TraceThroughPatchCollide( traceWork_t *tw, const struct patchCollide_s *pc );
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qboolean CM_PositionTestInPatchCollide( traceWork_t *tw, const struct patchCollide_s *pc );
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void CM_DrawDebugSurface( void (*drawPoly)(int color, int numPoints, flaot *points) );
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WARNING: this may misbehave with meshes that have rows or columns that only
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degenerate a few triangles. Completely degenerate rows and columns are handled
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properly.
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*/
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/*
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#define MAX_FACETS 1024
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#define MAX_PATCH_PLANES 2048
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typedef struct {
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float plane[4];
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int signbits; // signx + (signy<<1) + (signz<<2), used as lookup during collision
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} patchPlane_t;
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typedef struct {
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int surfacePlane;
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int numBorders; // 3 or four + 6 axial bevels + 4 or 3 * 4 edge bevels
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int borderPlanes[4+6+16];
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int borderInward[4+6+16];
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qboolean borderNoAdjust[4+6+16];
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} facet_t;
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typedef struct patchCollide_s {
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vec3_t bounds[2];
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int numPlanes; // surface planes plus edge planes
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patchPlane_t *planes;
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int numFacets;
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facet_t *facets;
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} patchCollide_t;
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#define MAX_GRID_SIZE 129
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typedef struct {
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int width;
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int height;
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qboolean wrapWidth;
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qboolean wrapHeight;
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vec3_t points[MAX_GRID_SIZE][MAX_GRID_SIZE]; // [width][height]
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} cGrid_t;
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#define SUBDIVIDE_DISTANCE 16 //4 // never more than this units away from curve
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#define PLANE_TRI_EPSILON 0.1
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#define WRAP_POINT_EPSILON 0.1
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*/
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int c_totalPatchBlocks;
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int c_totalPatchSurfaces;
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int c_totalPatchEdges;
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static const patchCollide_t *debugPatchCollide;
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static const facet_t *debugFacet;
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static qboolean debugBlock;
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static vec3_t debugBlockPoints[4];
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/*
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=================
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CM_ClearLevelPatches
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=================
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*/
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void CM_ClearLevelPatches( void ) {
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debugPatchCollide = NULL;
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debugFacet = NULL;
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}
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/*
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=================
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CM_SignbitsForNormal
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=================
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*/
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static int CM_SignbitsForNormal( vec3_t normal ) {
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int bits, j;
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bits = 0;
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for (j=0 ; j<3 ; j++) {
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if ( normal[j] < 0 ) {
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bits |= 1<<j;
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}
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}
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return bits;
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}
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/*
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=====================
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CM_PlaneFromPoints
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Returns false if the triangle is degenrate.
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The normal will point out of the clock for clockwise ordered points
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=====================
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*/
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static qboolean CM_PlaneFromPoints( vec4_t plane, vec3_t a, vec3_t b, vec3_t c ) {
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vec3_t d1, d2;
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VectorSubtract( b, a, d1 );
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VectorSubtract( c, a, d2 );
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CrossProduct( d2, d1, plane );
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if ( VectorNormalize( plane ) == 0 ) {
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return qfalse;
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}
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plane[3] = DotProduct( a, plane );
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return qtrue;
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}
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/*
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================================================================================
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GRID SUBDIVISION
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================================================================================
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*/
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/*
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=================
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CM_NeedsSubdivision
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Returns true if the given quadratic curve is not flat enough for our
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collision detection purposes
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=================
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*/
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static qboolean CM_NeedsSubdivision( vec3_t a, vec3_t b, vec3_t c ) {
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vec3_t cmid;
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vec3_t lmid;
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vec3_t delta;
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float dist;
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int i;
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// calculate the linear midpoint
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for ( i = 0 ; i < 3 ; i++ ) {
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lmid[i] = 0.5*(a[i] + c[i]);
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}
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// calculate the exact curve midpoint
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for ( i = 0 ; i < 3 ; i++ ) {
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cmid[i] = 0.5 * ( 0.5*(a[i] + b[i]) + 0.5*(b[i] + c[i]) );
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}
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// see if the curve is far enough away from the linear mid
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VectorSubtract( cmid, lmid, delta );
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dist = VectorLength( delta );
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return dist >= SUBDIVIDE_DISTANCE;
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}
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/*
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===============
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CM_Subdivide
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a, b, and c are control points.
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the subdivided sequence will be: a, out1, out2, out3, c
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===============
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*/
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static void CM_Subdivide( vec3_t a, vec3_t b, vec3_t c, vec3_t out1, vec3_t out2, vec3_t out3 ) {
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int i;
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for ( i = 0 ; i < 3 ; i++ ) {
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out1[i] = 0.5 * (a[i] + b[i]);
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out3[i] = 0.5 * (b[i] + c[i]);
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out2[i] = 0.5 * (out1[i] + out3[i]);
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}
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}
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/*
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=================
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CM_TransposeGrid
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Swaps the rows and columns in place
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=================
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*/
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static void CM_TransposeGrid( cGrid_t *grid ) {
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int i, j, l;
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vec3_t temp;
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qboolean tempWrap;
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if ( grid->width > grid->height ) {
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for ( i = 0 ; i < grid->height ; i++ ) {
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for ( j = i + 1 ; j < grid->width ; j++ ) {
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if ( j < grid->height ) {
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// swap the value
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VectorCopy( grid->points[i][j], temp );
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VectorCopy( grid->points[j][i], grid->points[i][j] );
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VectorCopy( temp, grid->points[j][i] );
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} else {
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// just copy
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VectorCopy( grid->points[j][i], grid->points[i][j] );
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}
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}
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}
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} else {
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for ( i = 0 ; i < grid->width ; i++ ) {
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for ( j = i + 1 ; j < grid->height ; j++ ) {
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if ( j < grid->width ) {
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// swap the value
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VectorCopy( grid->points[j][i], temp );
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VectorCopy( grid->points[i][j], grid->points[j][i] );
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VectorCopy( temp, grid->points[i][j] );
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} else {
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// just copy
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VectorCopy( grid->points[i][j], grid->points[j][i] );
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}
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}
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}
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}
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l = grid->width;
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grid->width = grid->height;
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grid->height = l;
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tempWrap = grid->wrapWidth;
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grid->wrapWidth = grid->wrapHeight;
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grid->wrapHeight = tempWrap;
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}
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/*
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===================
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CM_SetGridWrapWidth
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If the left and right columns are exactly equal, set grid->wrapWidth qtrue
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===================
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*/
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static void CM_SetGridWrapWidth( cGrid_t *grid ) {
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int i, j;
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float d;
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for ( i = 0 ; i < grid->height ; i++ ) {
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for ( j = 0 ; j < 3 ; j++ ) {
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d = grid->points[0][i][j] - grid->points[grid->width-1][i][j];
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if ( d < -WRAP_POINT_EPSILON || d > WRAP_POINT_EPSILON ) {
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break;
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}
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}
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if ( j != 3 ) {
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break;
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}
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}
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if ( i == grid->height ) {
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grid->wrapWidth = qtrue;
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} else {
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grid->wrapWidth = qfalse;
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}
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}
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/*
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=================
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CM_SubdivideGridColumns
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Adds columns as necessary to the grid until
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all the aproximating points are within SUBDIVIDE_DISTANCE
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from the true curve
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=================
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*/
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static void CM_SubdivideGridColumns( cGrid_t *grid ) {
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int i, j, k;
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for ( i = 0 ; i < grid->width - 2 ; ) {
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// grid->points[i][x] is an interpolating control point
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// grid->points[i+1][x] is an aproximating control point
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// grid->points[i+2][x] is an interpolating control point
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//
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// first see if we can collapse the aproximating collumn away
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//
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for ( j = 0 ; j < grid->height ; j++ ) {
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if ( CM_NeedsSubdivision( grid->points[i][j], grid->points[i+1][j], grid->points[i+2][j] ) ) {
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break;
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}
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}
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if ( j == grid->height ) {
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// all of the points were close enough to the linear midpoints
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// that we can collapse the entire column away
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for ( j = 0 ; j < grid->height ; j++ ) {
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// remove the column
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for ( k = i + 2 ; k < grid->width ; k++ ) {
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VectorCopy( grid->points[k][j], grid->points[k-1][j] );
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}
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}
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grid->width--;
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// go to the next curve segment
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i++;
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continue;
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}
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//
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// we need to subdivide the curve
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//
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for ( j = 0 ; j < grid->height ; j++ ) {
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vec3_t prev, mid, next;
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// save the control points now
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VectorCopy( grid->points[i][j], prev );
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VectorCopy( grid->points[i+1][j], mid );
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VectorCopy( grid->points[i+2][j], next );
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// make room for two additional columns in the grid
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// columns i+1 will be replaced, column i+2 will become i+4
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// i+1, i+2, and i+3 will be generated
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for ( k = grid->width - 1 ; k > i + 1 ; k-- ) {
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VectorCopy( grid->points[k][j], grid->points[k+2][j] );
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}
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// generate the subdivided points
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CM_Subdivide( prev, mid, next, grid->points[i+1][j], grid->points[i+2][j], grid->points[i+3][j] );
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}
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grid->width += 2;
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// the new aproximating point at i+1 may need to be removed
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// or subdivided farther, so don't advance i
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}
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}
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/*
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======================
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CM_ComparePoints
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======================
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*/
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#define POINT_EPSILON 0.1
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static qboolean CM_ComparePoints( float *a, float *b ) {
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float d;
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d = a[0] - b[0];
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if ( d < -POINT_EPSILON || d > POINT_EPSILON ) {
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return qfalse;
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}
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d = a[1] - b[1];
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if ( d < -POINT_EPSILON || d > POINT_EPSILON ) {
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return qfalse;
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}
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d = a[2] - b[2];
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if ( d < -POINT_EPSILON || d > POINT_EPSILON ) {
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return qfalse;
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}
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return qtrue;
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}
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/*
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=================
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CM_RemoveDegenerateColumns
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If there are any identical columns, remove them
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=================
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*/
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static void CM_RemoveDegenerateColumns( cGrid_t *grid ) {
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int i, j, k;
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for ( i = 0 ; i < grid->width - 1 ; i++ ) {
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for ( j = 0 ; j < grid->height ; j++ ) {
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if ( !CM_ComparePoints( grid->points[i][j], grid->points[i+1][j] ) ) {
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break;
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}
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}
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if ( j != grid->height ) {
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continue; // not degenerate
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}
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for ( j = 0 ; j < grid->height ; j++ ) {
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// remove the column
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for ( k = i + 2 ; k < grid->width ; k++ ) {
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VectorCopy( grid->points[k][j], grid->points[k-1][j] );
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}
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}
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grid->width--;
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// check against the next column
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i--;
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}
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}
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/*
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================================================================================
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PATCH COLLIDE GENERATION
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================================================================================
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*/
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static int numPlanes;
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static patchPlane_t planes[MAX_PATCH_PLANES];
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static int numFacets;
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static facet_t facets[MAX_PATCH_PLANES]; //maybe MAX_FACETS ??
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#define NORMAL_EPSILON 0.0001
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#define DIST_EPSILON 0.02
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/*
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==================
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CM_PlaneEqual
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==================
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*/
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int CM_PlaneEqual(patchPlane_t *p, float plane[4], int *flipped) {
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float invplane[4];
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if (
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fabs(p->plane[0] - plane[0]) < NORMAL_EPSILON
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&& fabs(p->plane[1] - plane[1]) < NORMAL_EPSILON
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&& fabs(p->plane[2] - plane[2]) < NORMAL_EPSILON
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&& fabs(p->plane[3] - plane[3]) < DIST_EPSILON )
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{
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*flipped = qfalse;
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return qtrue;
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}
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VectorNegate(plane, invplane);
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invplane[3] = -plane[3];
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if (
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fabs(p->plane[0] - invplane[0]) < NORMAL_EPSILON
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&& fabs(p->plane[1] - invplane[1]) < NORMAL_EPSILON
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&& fabs(p->plane[2] - invplane[2]) < NORMAL_EPSILON
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&& fabs(p->plane[3] - invplane[3]) < DIST_EPSILON )
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{
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*flipped = qtrue;
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return qtrue;
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}
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return qfalse;
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}
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/*
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==================
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CM_SnapVector
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==================
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*/
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void CM_SnapVector(vec3_t normal) {
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int i;
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for (i=0 ; i<3 ; i++)
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{
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if ( fabs(normal[i] - 1) < NORMAL_EPSILON )
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{
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VectorClear (normal);
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normal[i] = 1;
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break;
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}
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if ( fabs(normal[i] - -1) < NORMAL_EPSILON )
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{
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VectorClear (normal);
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normal[i] = -1;
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break;
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}
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}
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}
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/*
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==================
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CM_FindPlane2
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==================
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*/
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int CM_FindPlane2(float plane[4], int *flipped) {
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int i;
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// see if the points are close enough to an existing plane
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for ( i = 0 ; i < numPlanes ; i++ ) {
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if (CM_PlaneEqual(&planes[i], plane, flipped)) return i;
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}
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// add a new plane
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if ( numPlanes == MAX_PATCH_PLANES ) {
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Com_Error( ERR_DROP, "MAX_PATCH_PLANES" );
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}
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Vector4Copy( plane, planes[numPlanes].plane );
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planes[numPlanes].signbits = CM_SignbitsForNormal( plane );
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numPlanes++;
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*flipped = qfalse;
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return numPlanes-1;
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}
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/*
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==================
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CM_FindPlane
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==================
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*/
|
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static int CM_FindPlane( float *p1, float *p2, float *p3 ) {
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float plane[4];
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int i;
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float d;
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if ( !CM_PlaneFromPoints( plane, p1, p2, p3 ) ) {
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return -1;
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}
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// see if the points are close enough to an existing plane
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for ( i = 0 ; i < numPlanes ; i++ ) {
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if ( DotProduct( plane, planes[i].plane ) < 0 ) {
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continue; // allow backwards planes?
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}
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d = DotProduct( p1, planes[i].plane ) - planes[i].plane[3];
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if ( d < -PLANE_TRI_EPSILON || d > PLANE_TRI_EPSILON ) {
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continue;
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}
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d = DotProduct( p2, planes[i].plane ) - planes[i].plane[3];
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if ( d < -PLANE_TRI_EPSILON || d > PLANE_TRI_EPSILON ) {
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continue;
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}
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d = DotProduct( p3, planes[i].plane ) - planes[i].plane[3];
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if ( d < -PLANE_TRI_EPSILON || d > PLANE_TRI_EPSILON ) {
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continue;
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}
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// found it
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return i;
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}
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|
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// add a new plane
|
|
if ( numPlanes == MAX_PATCH_PLANES ) {
|
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Com_Error( ERR_DROP, "MAX_PATCH_PLANES" );
|
|
}
|
|
|
|
Vector4Copy( plane, planes[numPlanes].plane );
|
|
planes[numPlanes].signbits = CM_SignbitsForNormal( plane );
|
|
|
|
numPlanes++;
|
|
|
|
return numPlanes-1;
|
|
}
|
|
|
|
/*
|
|
==================
|
|
CM_PointOnPlaneSide
|
|
==================
|
|
*/
|
|
static int CM_PointOnPlaneSide( float *p, int planeNum ) {
|
|
float *plane;
|
|
float d;
|
|
|
|
if ( planeNum == -1 ) {
|
|
return SIDE_ON;
|
|
}
|
|
plane = planes[ planeNum ].plane;
|
|
|
|
d = DotProduct( p, plane ) - plane[3];
|
|
|
|
if ( d > PLANE_TRI_EPSILON ) {
|
|
return SIDE_FRONT;
|
|
}
|
|
|
|
if ( d < -PLANE_TRI_EPSILON ) {
|
|
return SIDE_BACK;
|
|
}
|
|
|
|
return SIDE_ON;
|
|
}
|
|
|
|
/*
|
|
==================
|
|
CM_GridPlane
|
|
==================
|
|
*/
|
|
static int CM_GridPlane( int gridPlanes[MAX_GRID_SIZE][MAX_GRID_SIZE][2], int i, int j, int tri ) {
|
|
int p;
|
|
|
|
p = gridPlanes[i][j][tri];
|
|
if ( p != -1 ) {
|
|
return p;
|
|
}
|
|
p = gridPlanes[i][j][!tri];
|
|
if ( p != -1 ) {
|
|
return p;
|
|
}
|
|
|
|
// should never happen
|
|
Com_Printf( "WARNING: CM_GridPlane unresolvable\n" );
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
==================
|
|
CM_EdgePlaneNum
|
|
==================
|
|
*/
|
|
static int CM_EdgePlaneNum( cGrid_t *grid, int gridPlanes[MAX_GRID_SIZE][MAX_GRID_SIZE][2], int i, int j, int k ) {
|
|
float *p1, *p2;
|
|
vec3_t up;
|
|
int p;
|
|
|
|
switch ( k ) {
|
|
case 0: // top border
|
|
p1 = grid->points[i][j];
|
|
p2 = grid->points[i+1][j];
|
|
p = CM_GridPlane( gridPlanes, i, j, 0 );
|
|
if ( p == -1 ) {
|
|
return -1;
|
|
}
|
|
VectorMA( p1, 4, planes[ p ].plane, up );
|
|
return CM_FindPlane( p1, p2, up );
|
|
|
|
case 2: // bottom border
|
|
p1 = grid->points[i][j+1];
|
|
p2 = grid->points[i+1][j+1];
|
|
p = CM_GridPlane( gridPlanes, i, j, 1 );
|
|
if ( p == -1 ) {
|
|
return -1;
|
|
}
|
|
VectorMA( p1, 4, planes[ p ].plane, up );
|
|
return CM_FindPlane( p2, p1, up );
|
|
|
|
case 3: // left border
|
|
p1 = grid->points[i][j];
|
|
p2 = grid->points[i][j+1];
|
|
p = CM_GridPlane( gridPlanes, i, j, 1 );
|
|
if ( p == -1 ) {
|
|
return -1;
|
|
}
|
|
VectorMA( p1, 4, planes[ p ].plane, up );
|
|
return CM_FindPlane( p2, p1, up );
|
|
|
|
case 1: // right border
|
|
p1 = grid->points[i+1][j];
|
|
p2 = grid->points[i+1][j+1];
|
|
p = CM_GridPlane( gridPlanes, i, j, 0 );
|
|
if ( p == -1 ) {
|
|
return -1;
|
|
}
|
|
VectorMA( p1, 4, planes[ p ].plane, up );
|
|
return CM_FindPlane( p1, p2, up );
|
|
|
|
case 4: // diagonal out of triangle 0
|
|
p1 = grid->points[i+1][j+1];
|
|
p2 = grid->points[i][j];
|
|
p = CM_GridPlane( gridPlanes, i, j, 0 );
|
|
if ( p == -1 ) {
|
|
return -1;
|
|
}
|
|
VectorMA( p1, 4, planes[ p ].plane, up );
|
|
return CM_FindPlane( p1, p2, up );
|
|
|
|
case 5: // diagonal out of triangle 1
|
|
p1 = grid->points[i][j];
|
|
p2 = grid->points[i+1][j+1];
|
|
p = CM_GridPlane( gridPlanes, i, j, 1 );
|
|
if ( p == -1 ) {
|
|
return -1;
|
|
}
|
|
VectorMA( p1, 4, planes[ p ].plane, up );
|
|
return CM_FindPlane( p1, p2, up );
|
|
|
|
}
|
|
|
|
Com_Error( ERR_DROP, "CM_EdgePlaneNum: bad k" );
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
===================
|
|
CM_SetBorderInward
|
|
===================
|
|
*/
|
|
static void CM_SetBorderInward( facet_t *facet, cGrid_t *grid, int gridPlanes[MAX_GRID_SIZE][MAX_GRID_SIZE][2],
|
|
int i, int j, int which ) {
|
|
int k, l;
|
|
float *points[4];
|
|
int numPoints;
|
|
|
|
switch ( which ) {
|
|
case -1:
|
|
points[0] = grid->points[i][j];
|
|
points[1] = grid->points[i+1][j];
|
|
points[2] = grid->points[i+1][j+1];
|
|
points[3] = grid->points[i][j+1];
|
|
numPoints = 4;
|
|
break;
|
|
case 0:
|
|
points[0] = grid->points[i][j];
|
|
points[1] = grid->points[i+1][j];
|
|
points[2] = grid->points[i+1][j+1];
|
|
numPoints = 3;
|
|
break;
|
|
case 1:
|
|
points[0] = grid->points[i+1][j+1];
|
|
points[1] = grid->points[i][j+1];
|
|
points[2] = grid->points[i][j];
|
|
numPoints = 3;
|
|
break;
|
|
default:
|
|
Com_Error( ERR_FATAL, "CM_SetBorderInward: bad parameter" );
|
|
numPoints = 0;
|
|
break;
|
|
}
|
|
|
|
for ( k = 0 ; k < facet->numBorders ; k++ ) {
|
|
int front, back;
|
|
|
|
front = 0;
|
|
back = 0;
|
|
|
|
for ( l = 0 ; l < numPoints ; l++ ) {
|
|
int side;
|
|
|
|
side = CM_PointOnPlaneSide( points[l], facet->borderPlanes[k] );
|
|
if ( side == SIDE_FRONT ) {
|
|
front++;
|
|
} if ( side == SIDE_BACK ) {
|
|
back++;
|
|
}
|
|
}
|
|
|
|
if ( front && !back ) {
|
|
facet->borderInward[k] = qtrue;
|
|
} else if ( back && !front ) {
|
|
facet->borderInward[k] = qfalse;
|
|
} else if ( !front && !back ) {
|
|
// flat side border
|
|
facet->borderPlanes[k] = -1;
|
|
} else {
|
|
// bisecting side border
|
|
Com_DPrintf( "WARNING: CM_SetBorderInward: mixed plane sides\n" );
|
|
facet->borderInward[k] = qfalse;
|
|
if ( !debugBlock ) {
|
|
debugBlock = qtrue;
|
|
VectorCopy( grid->points[i][j], debugBlockPoints[0] );
|
|
VectorCopy( grid->points[i+1][j], debugBlockPoints[1] );
|
|
VectorCopy( grid->points[i+1][j+1], debugBlockPoints[2] );
|
|
VectorCopy( grid->points[i][j+1], debugBlockPoints[3] );
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
==================
|
|
CM_ValidateFacet
|
|
|
|
If the facet isn't bounded by its borders, we screwed up.
|
|
==================
|
|
*/
|
|
static qboolean CM_ValidateFacet( facet_t *facet ) {
|
|
float plane[4];
|
|
int j;
|
|
winding_t *w;
|
|
vec3_t bounds[2];
|
|
|
|
if ( facet->surfacePlane == -1 ) {
|
|
return qfalse;
|
|
}
|
|
|
|
Vector4Copy( planes[ facet->surfacePlane ].plane, plane );
|
|
w = BaseWindingForPlane( plane, plane[3] );
|
|
for ( j = 0 ; j < facet->numBorders && w ; j++ ) {
|
|
if ( facet->borderPlanes[j] == -1 ) {
|
|
FreeWinding( w );
|
|
return qfalse;
|
|
}
|
|
Vector4Copy( planes[ facet->borderPlanes[j] ].plane, plane );
|
|
if ( !facet->borderInward[j] ) {
|
|
VectorSubtract( vec3_origin, plane, plane );
|
|
plane[3] = -plane[3];
|
|
}
|
|
ChopWindingInPlace( &w, plane, plane[3], 0.1f );
|
|
}
|
|
|
|
if ( !w ) {
|
|
return qfalse; // winding was completely chopped away
|
|
}
|
|
|
|
// see if the facet is unreasonably large
|
|
WindingBounds( w, bounds[0], bounds[1] );
|
|
FreeWinding( w );
|
|
|
|
for ( j = 0 ; j < 3 ; j++ ) {
|
|
if ( bounds[1][j] - bounds[0][j] > MAX_MAP_BOUNDS ) {
|
|
return qfalse; // we must be missing a plane
|
|
}
|
|
if ( bounds[0][j] >= MAX_MAP_BOUNDS ) {
|
|
return qfalse;
|
|
}
|
|
if ( bounds[1][j] <= -MAX_MAP_BOUNDS ) {
|
|
return qfalse;
|
|
}
|
|
}
|
|
return qtrue; // winding is fine
|
|
}
|
|
|
|
/*
|
|
==================
|
|
CM_AddFacetBevels
|
|
==================
|
|
*/
|
|
void CM_AddFacetBevels( facet_t *facet ) {
|
|
|
|
int i, j, k, l;
|
|
int axis, dir, order, flipped;
|
|
float plane[4], d, newplane[4];
|
|
winding_t *w, *w2;
|
|
vec3_t mins, maxs, vec, vec2;
|
|
|
|
Vector4Copy( planes[ facet->surfacePlane ].plane, plane );
|
|
|
|
w = BaseWindingForPlane( plane, plane[3] );
|
|
for ( j = 0 ; j < facet->numBorders && w ; j++ ) {
|
|
if (facet->borderPlanes[j] == facet->surfacePlane) continue;
|
|
Vector4Copy( planes[ facet->borderPlanes[j] ].plane, plane );
|
|
|
|
if ( !facet->borderInward[j] ) {
|
|
VectorSubtract( vec3_origin, plane, plane );
|
|
plane[3] = -plane[3];
|
|
}
|
|
|
|
ChopWindingInPlace( &w, plane, plane[3], 0.1f );
|
|
}
|
|
if ( !w ) {
|
|
return;
|
|
}
|
|
|
|
WindingBounds(w, mins, maxs);
|
|
|
|
// add the axial planes
|
|
order = 0;
|
|
for ( axis = 0 ; axis < 3 ; axis++ )
|
|
{
|
|
for ( dir = -1 ; dir <= 1 ; dir += 2, order++ )
|
|
{
|
|
VectorClear(plane);
|
|
plane[axis] = dir;
|
|
if (dir == 1) {
|
|
plane[3] = maxs[axis];
|
|
}
|
|
else {
|
|
plane[3] = -mins[axis];
|
|
}
|
|
//if it's the surface plane
|
|
if (CM_PlaneEqual(&planes[facet->surfacePlane], plane, &flipped)) {
|
|
continue;
|
|
}
|
|
// see if the plane is allready present
|
|
for ( i = 0 ; i < facet->numBorders ; i++ ) {
|
|
if (CM_PlaneEqual(&planes[facet->borderPlanes[i]], plane, &flipped))
|
|
break;
|
|
}
|
|
|
|
if ( i == facet->numBorders ) {
|
|
if ( facet->numBorders >= 4 + 6 + 16 ) {
|
|
Com_Printf( "ERROR: too many bevels\n" );
|
|
continue;
|
|
}
|
|
facet->borderPlanes[facet->numBorders] = CM_FindPlane2(plane, &flipped);
|
|
facet->borderNoAdjust[facet->numBorders] = 0;
|
|
facet->borderInward[facet->numBorders] = flipped;
|
|
facet->numBorders++;
|
|
}
|
|
}
|
|
}
|
|
//
|
|
// add the edge bevels
|
|
//
|
|
// test the non-axial plane edges
|
|
for ( j = 0 ; j < w->numpoints ; j++ )
|
|
{
|
|
k = (j+1)%w->numpoints;
|
|
VectorSubtract (w->p[j], w->p[k], vec);
|
|
//if it's a degenerate edge
|
|
if (VectorNormalize (vec) < 0.5)
|
|
continue;
|
|
CM_SnapVector(vec);
|
|
for ( k = 0; k < 3 ; k++ )
|
|
if ( vec[k] == -1 || vec[k] == 1 )
|
|
break; // axial
|
|
if ( k < 3 )
|
|
continue; // only test non-axial edges
|
|
|
|
// try the six possible slanted axials from this edge
|
|
for ( axis = 0 ; axis < 3 ; axis++ )
|
|
{
|
|
for ( dir = -1 ; dir <= 1 ; dir += 2 )
|
|
{
|
|
// construct a plane
|
|
VectorClear (vec2);
|
|
vec2[axis] = dir;
|
|
CrossProduct (vec, vec2, plane);
|
|
if (VectorNormalize (plane) < 0.5)
|
|
continue;
|
|
plane[3] = DotProduct (w->p[j], plane);
|
|
|
|
// if all the points of the facet winding are
|
|
// behind this plane, it is a proper edge bevel
|
|
for ( l = 0 ; l < w->numpoints ; l++ )
|
|
{
|
|
d = DotProduct (w->p[l], plane) - plane[3];
|
|
if (d > 0.1)
|
|
break; // point in front
|
|
}
|
|
if ( l < w->numpoints )
|
|
continue;
|
|
|
|
//if it's the surface plane
|
|
if (CM_PlaneEqual(&planes[facet->surfacePlane], plane, &flipped)) {
|
|
continue;
|
|
}
|
|
// see if the plane is allready present
|
|
for ( i = 0 ; i < facet->numBorders ; i++ ) {
|
|
if (CM_PlaneEqual(&planes[facet->borderPlanes[i]], plane, &flipped)) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if ( i == facet->numBorders ) {
|
|
if ( facet->numBorders >= 4 + 6 + 16 ) {
|
|
Com_Printf( "ERROR: too many bevels\n" );
|
|
continue;
|
|
}
|
|
facet->borderPlanes[facet->numBorders] = CM_FindPlane2(plane, &flipped);
|
|
|
|
for ( k = 0 ; k < facet->numBorders ; k++ ) {
|
|
if (facet->borderPlanes[facet->numBorders] ==
|
|
facet->borderPlanes[k]) Com_Printf("WARNING: bevel plane already used\n");
|
|
}
|
|
|
|
facet->borderNoAdjust[facet->numBorders] = 0;
|
|
facet->borderInward[facet->numBorders] = flipped;
|
|
//
|
|
w2 = CopyWinding(w);
|
|
Vector4Copy(planes[facet->borderPlanes[facet->numBorders]].plane, newplane);
|
|
if (!facet->borderInward[facet->numBorders])
|
|
{
|
|
VectorNegate(newplane, newplane);
|
|
newplane[3] = -newplane[3];
|
|
} //end if
|
|
ChopWindingInPlace( &w2, newplane, newplane[3], 0.1f );
|
|
if (!w2) {
|
|
Com_DPrintf("WARNING: CM_AddFacetBevels... invalid bevel\n");
|
|
continue;
|
|
}
|
|
else {
|
|
FreeWinding(w2);
|
|
}
|
|
//
|
|
facet->numBorders++;
|
|
//already got a bevel
|
|
// break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
FreeWinding( w );
|
|
|
|
#ifndef BSPC
|
|
//add opposite plane
|
|
if ( facet->numBorders >= 4 + 6 + 16 ) {
|
|
Com_Printf( "ERROR: too many bevels\n" );
|
|
return;
|
|
}
|
|
facet->borderPlanes[facet->numBorders] = facet->surfacePlane;
|
|
facet->borderNoAdjust[facet->numBorders] = 0;
|
|
facet->borderInward[facet->numBorders] = qtrue;
|
|
facet->numBorders++;
|
|
#endif //BSPC
|
|
|
|
}
|
|
|
|
typedef enum {
|
|
EN_TOP,
|
|
EN_RIGHT,
|
|
EN_BOTTOM,
|
|
EN_LEFT
|
|
} edgeName_t;
|
|
|
|
/*
|
|
==================
|
|
CM_PatchCollideFromGrid
|
|
==================
|
|
*/
|
|
static void CM_PatchCollideFromGrid( cGrid_t *grid, patchCollide_t *pf ) {
|
|
int i, j;
|
|
float *p1, *p2, *p3;
|
|
int gridPlanes[MAX_GRID_SIZE][MAX_GRID_SIZE][2];
|
|
facet_t *facet;
|
|
int borders[4];
|
|
int noAdjust[4];
|
|
|
|
numPlanes = 0;
|
|
numFacets = 0;
|
|
|
|
// find the planes for each triangle of the grid
|
|
for ( i = 0 ; i < grid->width - 1 ; i++ ) {
|
|
for ( j = 0 ; j < grid->height - 1 ; j++ ) {
|
|
p1 = grid->points[i][j];
|
|
p2 = grid->points[i+1][j];
|
|
p3 = grid->points[i+1][j+1];
|
|
gridPlanes[i][j][0] = CM_FindPlane( p1, p2, p3 );
|
|
|
|
p1 = grid->points[i+1][j+1];
|
|
p2 = grid->points[i][j+1];
|
|
p3 = grid->points[i][j];
|
|
gridPlanes[i][j][1] = CM_FindPlane( p1, p2, p3 );
|
|
}
|
|
}
|
|
|
|
// create the borders for each facet
|
|
for ( i = 0 ; i < grid->width - 1 ; i++ ) {
|
|
for ( j = 0 ; j < grid->height - 1 ; j++ ) {
|
|
|
|
borders[EN_TOP] = -1;
|
|
if ( j > 0 ) {
|
|
borders[EN_TOP] = gridPlanes[i][j-1][1];
|
|
} else if ( grid->wrapHeight ) {
|
|
borders[EN_TOP] = gridPlanes[i][grid->height-2][1];
|
|
}
|
|
noAdjust[EN_TOP] = ( borders[EN_TOP] == gridPlanes[i][j][0] );
|
|
if ( borders[EN_TOP] == -1 || noAdjust[EN_TOP] ) {
|
|
borders[EN_TOP] = CM_EdgePlaneNum( grid, gridPlanes, i, j, 0 );
|
|
}
|
|
|
|
borders[EN_BOTTOM] = -1;
|
|
if ( j < grid->height - 2 ) {
|
|
borders[EN_BOTTOM] = gridPlanes[i][j+1][0];
|
|
} else if ( grid->wrapHeight ) {
|
|
borders[EN_BOTTOM] = gridPlanes[i][0][0];
|
|
}
|
|
noAdjust[EN_BOTTOM] = ( borders[EN_BOTTOM] == gridPlanes[i][j][1] );
|
|
if ( borders[EN_BOTTOM] == -1 || noAdjust[EN_BOTTOM] ) {
|
|
borders[EN_BOTTOM] = CM_EdgePlaneNum( grid, gridPlanes, i, j, 2 );
|
|
}
|
|
|
|
borders[EN_LEFT] = -1;
|
|
if ( i > 0 ) {
|
|
borders[EN_LEFT] = gridPlanes[i-1][j][0];
|
|
} else if ( grid->wrapWidth ) {
|
|
borders[EN_LEFT] = gridPlanes[grid->width-2][j][0];
|
|
}
|
|
noAdjust[EN_LEFT] = ( borders[EN_LEFT] == gridPlanes[i][j][1] );
|
|
if ( borders[EN_LEFT] == -1 || noAdjust[EN_LEFT] ) {
|
|
borders[EN_LEFT] = CM_EdgePlaneNum( grid, gridPlanes, i, j, 3 );
|
|
}
|
|
|
|
borders[EN_RIGHT] = -1;
|
|
if ( i < grid->width - 2 ) {
|
|
borders[EN_RIGHT] = gridPlanes[i+1][j][1];
|
|
} else if ( grid->wrapWidth ) {
|
|
borders[EN_RIGHT] = gridPlanes[0][j][1];
|
|
}
|
|
noAdjust[EN_RIGHT] = ( borders[EN_RIGHT] == gridPlanes[i][j][0] );
|
|
if ( borders[EN_RIGHT] == -1 || noAdjust[EN_RIGHT] ) {
|
|
borders[EN_RIGHT] = CM_EdgePlaneNum( grid, gridPlanes, i, j, 1 );
|
|
}
|
|
|
|
if ( numFacets == MAX_FACETS ) {
|
|
Com_Error( ERR_DROP, "MAX_FACETS" );
|
|
}
|
|
facet = &facets[numFacets];
|
|
Com_Memset( facet, 0, sizeof( *facet ) );
|
|
|
|
if ( gridPlanes[i][j][0] == gridPlanes[i][j][1] ) {
|
|
if ( gridPlanes[i][j][0] == -1 ) {
|
|
continue; // degenrate
|
|
}
|
|
facet->surfacePlane = gridPlanes[i][j][0];
|
|
facet->numBorders = 4;
|
|
facet->borderPlanes[0] = borders[EN_TOP];
|
|
facet->borderNoAdjust[0] = noAdjust[EN_TOP];
|
|
facet->borderPlanes[1] = borders[EN_RIGHT];
|
|
facet->borderNoAdjust[1] = noAdjust[EN_RIGHT];
|
|
facet->borderPlanes[2] = borders[EN_BOTTOM];
|
|
facet->borderNoAdjust[2] = noAdjust[EN_BOTTOM];
|
|
facet->borderPlanes[3] = borders[EN_LEFT];
|
|
facet->borderNoAdjust[3] = noAdjust[EN_LEFT];
|
|
CM_SetBorderInward( facet, grid, gridPlanes, i, j, -1 );
|
|
if ( CM_ValidateFacet( facet ) ) {
|
|
CM_AddFacetBevels( facet );
|
|
numFacets++;
|
|
}
|
|
} else {
|
|
// two seperate triangles
|
|
facet->surfacePlane = gridPlanes[i][j][0];
|
|
facet->numBorders = 3;
|
|
facet->borderPlanes[0] = borders[EN_TOP];
|
|
facet->borderNoAdjust[0] = noAdjust[EN_TOP];
|
|
facet->borderPlanes[1] = borders[EN_RIGHT];
|
|
facet->borderNoAdjust[1] = noAdjust[EN_RIGHT];
|
|
facet->borderPlanes[2] = gridPlanes[i][j][1];
|
|
if ( facet->borderPlanes[2] == -1 ) {
|
|
facet->borderPlanes[2] = borders[EN_BOTTOM];
|
|
if ( facet->borderPlanes[2] == -1 ) {
|
|
facet->borderPlanes[2] = CM_EdgePlaneNum( grid, gridPlanes, i, j, 4 );
|
|
}
|
|
}
|
|
CM_SetBorderInward( facet, grid, gridPlanes, i, j, 0 );
|
|
if ( CM_ValidateFacet( facet ) ) {
|
|
CM_AddFacetBevels( facet );
|
|
numFacets++;
|
|
}
|
|
|
|
if ( numFacets == MAX_FACETS ) {
|
|
Com_Error( ERR_DROP, "MAX_FACETS" );
|
|
}
|
|
facet = &facets[numFacets];
|
|
Com_Memset( facet, 0, sizeof( *facet ) );
|
|
|
|
facet->surfacePlane = gridPlanes[i][j][1];
|
|
facet->numBorders = 3;
|
|
facet->borderPlanes[0] = borders[EN_BOTTOM];
|
|
facet->borderNoAdjust[0] = noAdjust[EN_BOTTOM];
|
|
facet->borderPlanes[1] = borders[EN_LEFT];
|
|
facet->borderNoAdjust[1] = noAdjust[EN_LEFT];
|
|
facet->borderPlanes[2] = gridPlanes[i][j][0];
|
|
if ( facet->borderPlanes[2] == -1 ) {
|
|
facet->borderPlanes[2] = borders[EN_TOP];
|
|
if ( facet->borderPlanes[2] == -1 ) {
|
|
facet->borderPlanes[2] = CM_EdgePlaneNum( grid, gridPlanes, i, j, 5 );
|
|
}
|
|
}
|
|
CM_SetBorderInward( facet, grid, gridPlanes, i, j, 1 );
|
|
if ( CM_ValidateFacet( facet ) ) {
|
|
CM_AddFacetBevels( facet );
|
|
numFacets++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// copy the results out
|
|
pf->numPlanes = numPlanes;
|
|
pf->numFacets = numFacets;
|
|
pf->facets = Hunk_Alloc( numFacets * sizeof( *pf->facets ), h_high );
|
|
Com_Memcpy( pf->facets, facets, numFacets * sizeof( *pf->facets ) );
|
|
pf->planes = Hunk_Alloc( numPlanes * sizeof( *pf->planes ), h_high );
|
|
Com_Memcpy( pf->planes, planes, numPlanes * sizeof( *pf->planes ) );
|
|
}
|
|
|
|
|
|
/*
|
|
===================
|
|
CM_GeneratePatchCollide
|
|
|
|
Creates an internal structure that will be used to perform
|
|
collision detection with a patch mesh.
|
|
|
|
Points is packed as concatenated rows.
|
|
===================
|
|
*/
|
|
struct patchCollide_s *CM_GeneratePatchCollide( int width, int height, vec3_t *points ) {
|
|
patchCollide_t *pf;
|
|
cGrid_t grid;
|
|
int i, j;
|
|
|
|
if ( width <= 2 || height <= 2 || !points ) {
|
|
Com_Error( ERR_DROP, "CM_GeneratePatchFacets: bad parameters: (%i, %i, %p)",
|
|
width, height, (void *)points );
|
|
}
|
|
|
|
if ( !(width & 1) || !(height & 1) ) {
|
|
Com_Error( ERR_DROP, "CM_GeneratePatchFacets: even sizes are invalid for quadratic meshes" );
|
|
}
|
|
|
|
if ( width > MAX_GRID_SIZE || height > MAX_GRID_SIZE ) {
|
|
Com_Error( ERR_DROP, "CM_GeneratePatchFacets: source is > MAX_GRID_SIZE" );
|
|
}
|
|
|
|
// build a grid
|
|
grid.width = width;
|
|
grid.height = height;
|
|
grid.wrapWidth = qfalse;
|
|
grid.wrapHeight = qfalse;
|
|
for ( i = 0 ; i < width ; i++ ) {
|
|
for ( j = 0 ; j < height ; j++ ) {
|
|
VectorCopy( points[j*width + i], grid.points[i][j] );
|
|
}
|
|
}
|
|
|
|
// subdivide the grid
|
|
CM_SetGridWrapWidth( &grid );
|
|
CM_SubdivideGridColumns( &grid );
|
|
CM_RemoveDegenerateColumns( &grid );
|
|
|
|
CM_TransposeGrid( &grid );
|
|
|
|
CM_SetGridWrapWidth( &grid );
|
|
CM_SubdivideGridColumns( &grid );
|
|
CM_RemoveDegenerateColumns( &grid );
|
|
|
|
// we now have a grid of points exactly on the curve
|
|
// the aproximate surface defined by these points will be
|
|
// collided against
|
|
pf = Hunk_Alloc( sizeof( *pf ), h_high );
|
|
ClearBounds( pf->bounds[0], pf->bounds[1] );
|
|
for ( i = 0 ; i < grid.width ; i++ ) {
|
|
for ( j = 0 ; j < grid.height ; j++ ) {
|
|
AddPointToBounds( grid.points[i][j], pf->bounds[0], pf->bounds[1] );
|
|
}
|
|
}
|
|
|
|
c_totalPatchBlocks += ( grid.width - 1 ) * ( grid.height - 1 );
|
|
|
|
// generate a bsp tree for the surface
|
|
CM_PatchCollideFromGrid( &grid, pf );
|
|
|
|
// expand by one unit for epsilon purposes
|
|
pf->bounds[0][0] -= 1;
|
|
pf->bounds[0][1] -= 1;
|
|
pf->bounds[0][2] -= 1;
|
|
|
|
pf->bounds[1][0] += 1;
|
|
pf->bounds[1][1] += 1;
|
|
pf->bounds[1][2] += 1;
|
|
|
|
return pf;
|
|
}
|
|
|
|
/*
|
|
================================================================================
|
|
|
|
TRACE TESTING
|
|
|
|
================================================================================
|
|
*/
|
|
|
|
/*
|
|
====================
|
|
CM_TracePointThroughPatchCollide
|
|
|
|
special case for point traces because the patch collide "brushes" have no volume
|
|
====================
|
|
*/
|
|
void CM_TracePointThroughPatchCollide( traceWork_t *tw, const struct patchCollide_s *pc ) {
|
|
qboolean frontFacing[MAX_PATCH_PLANES];
|
|
float intersection[MAX_PATCH_PLANES];
|
|
float intersect;
|
|
const patchPlane_t *planes;
|
|
const facet_t *facet;
|
|
int i, j, k;
|
|
float offset;
|
|
float d1, d2;
|
|
#ifndef BSPC
|
|
static cvar_t *cv;
|
|
#endif //BSPC
|
|
|
|
#ifndef BSPC
|
|
if ( !cm_playerCurveClip->integer || !tw->isPoint ) {
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
// determine the trace's relationship to all planes
|
|
planes = pc->planes;
|
|
for ( i = 0 ; i < pc->numPlanes ; i++, planes++ ) {
|
|
offset = DotProduct( tw->offsets[ planes->signbits ], planes->plane );
|
|
d1 = DotProduct( tw->start, planes->plane ) - planes->plane[3] + offset;
|
|
d2 = DotProduct( tw->end, planes->plane ) - planes->plane[3] + offset;
|
|
if ( d1 <= 0 ) {
|
|
frontFacing[i] = qfalse;
|
|
} else {
|
|
frontFacing[i] = qtrue;
|
|
}
|
|
if ( d1 == d2 ) {
|
|
intersection[i] = 99999;
|
|
} else {
|
|
intersection[i] = d1 / ( d1 - d2 );
|
|
if ( intersection[i] <= 0 ) {
|
|
intersection[i] = 99999;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
// see if any of the surface planes are intersected
|
|
facet = pc->facets;
|
|
for ( i = 0 ; i < pc->numFacets ; i++, facet++ ) {
|
|
if ( !frontFacing[facet->surfacePlane] ) {
|
|
continue;
|
|
}
|
|
intersect = intersection[facet->surfacePlane];
|
|
if ( intersect < 0 ) {
|
|
continue; // surface is behind the starting point
|
|
}
|
|
if ( intersect > tw->trace.fraction ) {
|
|
continue; // already hit something closer
|
|
}
|
|
for ( j = 0 ; j < facet->numBorders ; j++ ) {
|
|
k = facet->borderPlanes[j];
|
|
if ( frontFacing[k] ^ facet->borderInward[j] ) {
|
|
if ( intersection[k] > intersect ) {
|
|
break;
|
|
}
|
|
} else {
|
|
if ( intersection[k] < intersect ) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if ( j == facet->numBorders ) {
|
|
// we hit this facet
|
|
#ifndef BSPC
|
|
if (!cv) {
|
|
cv = Cvar_Get( "r_debugSurfaceUpdate", "1", 0 );
|
|
}
|
|
if (cv->integer) {
|
|
debugPatchCollide = pc;
|
|
debugFacet = facet;
|
|
}
|
|
#endif //BSPC
|
|
planes = &pc->planes[facet->surfacePlane];
|
|
|
|
// calculate intersection with a slight pushoff
|
|
offset = DotProduct( tw->offsets[ planes->signbits ], planes->plane );
|
|
d1 = DotProduct( tw->start, planes->plane ) - planes->plane[3] + offset;
|
|
d2 = DotProduct( tw->end, planes->plane ) - planes->plane[3] + offset;
|
|
tw->trace.fraction = ( d1 - SURFACE_CLIP_EPSILON ) / ( d1 - d2 );
|
|
|
|
if ( tw->trace.fraction < 0 ) {
|
|
tw->trace.fraction = 0;
|
|
}
|
|
|
|
VectorCopy( planes->plane, tw->trace.plane.normal );
|
|
tw->trace.plane.dist = planes->plane[3];
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
====================
|
|
CM_CheckFacetPlane
|
|
====================
|
|
*/
|
|
int CM_CheckFacetPlane(float *plane, vec3_t start, vec3_t end, float *enterFrac, float *leaveFrac, int *hit) {
|
|
float d1, d2, f;
|
|
|
|
*hit = qfalse;
|
|
|
|
d1 = DotProduct( start, plane ) - plane[3];
|
|
d2 = DotProduct( end, plane ) - plane[3];
|
|
|
|
// if completely in front of face, no intersection with the entire facet
|
|
if (d1 > 0 && ( d2 >= SURFACE_CLIP_EPSILON || d2 >= d1 ) ) {
|
|
return qfalse;
|
|
}
|
|
|
|
// if it doesn't cross the plane, the plane isn't relevent
|
|
if (d1 <= 0 && d2 <= 0 ) {
|
|
return qtrue;
|
|
}
|
|
|
|
// crosses face
|
|
if (d1 > d2) { // enter
|
|
f = (d1-SURFACE_CLIP_EPSILON) / (d1-d2);
|
|
if ( f < 0 ) {
|
|
f = 0;
|
|
}
|
|
//always favor previous plane hits and thus also the surface plane hit
|
|
if (f > *enterFrac) {
|
|
*enterFrac = f;
|
|
*hit = qtrue;
|
|
}
|
|
} else { // leave
|
|
f = (d1+SURFACE_CLIP_EPSILON) / (d1-d2);
|
|
if ( f > 1 ) {
|
|
f = 1;
|
|
}
|
|
if (f < *leaveFrac) {
|
|
*leaveFrac = f;
|
|
}
|
|
}
|
|
return qtrue;
|
|
}
|
|
|
|
/*
|
|
====================
|
|
CM_TraceThroughPatchCollide
|
|
====================
|
|
*/
|
|
void CM_TraceThroughPatchCollide( traceWork_t *tw, const struct patchCollide_s *pc ) {
|
|
int i, j, hit, hitnum;
|
|
float offset, enterFrac, leaveFrac, t;
|
|
patchPlane_t *planes;
|
|
facet_t *facet;
|
|
float plane[4] = {0, 0, 0, 0}, bestplane[4] = {0, 0, 0, 0};
|
|
vec3_t startp, endp;
|
|
#ifndef BSPC
|
|
static cvar_t *cv;
|
|
#endif //BSPC
|
|
|
|
if ( !CM_BoundsIntersect( tw->bounds[0], tw->bounds[1],
|
|
pc->bounds[0], pc->bounds[1] ) ) {
|
|
return;
|
|
}
|
|
|
|
if (tw->isPoint) {
|
|
CM_TracePointThroughPatchCollide( tw, pc );
|
|
return;
|
|
}
|
|
|
|
facet = pc->facets;
|
|
for ( i = 0 ; i < pc->numFacets ; i++, facet++ ) {
|
|
enterFrac = -1.0;
|
|
leaveFrac = 1.0;
|
|
hitnum = -1;
|
|
//
|
|
planes = &pc->planes[ facet->surfacePlane ];
|
|
VectorCopy(planes->plane, plane);
|
|
plane[3] = planes->plane[3];
|
|
if ( tw->sphere.use ) {
|
|
// adjust the plane distance apropriately for radius
|
|
plane[3] += tw->sphere.radius;
|
|
|
|
// find the closest point on the capsule to the plane
|
|
t = DotProduct( plane, tw->sphere.offset );
|
|
if ( t > 0.0f ) {
|
|
VectorSubtract( tw->start, tw->sphere.offset, startp );
|
|
VectorSubtract( tw->end, tw->sphere.offset, endp );
|
|
}
|
|
else {
|
|
VectorAdd( tw->start, tw->sphere.offset, startp );
|
|
VectorAdd( tw->end, tw->sphere.offset, endp );
|
|
}
|
|
}
|
|
else {
|
|
offset = DotProduct( tw->offsets[ planes->signbits ], plane);
|
|
plane[3] -= offset;
|
|
VectorCopy( tw->start, startp );
|
|
VectorCopy( tw->end, endp );
|
|
}
|
|
|
|
if (!CM_CheckFacetPlane(plane, startp, endp, &enterFrac, &leaveFrac, &hit)) {
|
|
continue;
|
|
}
|
|
if (hit) {
|
|
Vector4Copy(plane, bestplane);
|
|
}
|
|
|
|
for ( j = 0; j < facet->numBorders; j++ ) {
|
|
planes = &pc->planes[ facet->borderPlanes[j] ];
|
|
if (facet->borderInward[j]) {
|
|
VectorNegate(planes->plane, plane);
|
|
plane[3] = -planes->plane[3];
|
|
}
|
|
else {
|
|
VectorCopy(planes->plane, plane);
|
|
plane[3] = planes->plane[3];
|
|
}
|
|
if ( tw->sphere.use ) {
|
|
// adjust the plane distance apropriately for radius
|
|
plane[3] += tw->sphere.radius;
|
|
|
|
// find the closest point on the capsule to the plane
|
|
t = DotProduct( plane, tw->sphere.offset );
|
|
if ( t > 0.0f ) {
|
|
VectorSubtract( tw->start, tw->sphere.offset, startp );
|
|
VectorSubtract( tw->end, tw->sphere.offset, endp );
|
|
}
|
|
else {
|
|
VectorAdd( tw->start, tw->sphere.offset, startp );
|
|
VectorAdd( tw->end, tw->sphere.offset, endp );
|
|
}
|
|
}
|
|
else {
|
|
// NOTE: this works even though the plane might be flipped because the bbox is centered
|
|
offset = DotProduct( tw->offsets[ planes->signbits ], plane);
|
|
plane[3] += fabs(offset);
|
|
VectorCopy( tw->start, startp );
|
|
VectorCopy( tw->end, endp );
|
|
}
|
|
|
|
if (!CM_CheckFacetPlane(plane, startp, endp, &enterFrac, &leaveFrac, &hit)) {
|
|
break;
|
|
}
|
|
if (hit) {
|
|
hitnum = j;
|
|
Vector4Copy(plane, bestplane);
|
|
}
|
|
}
|
|
if (j < facet->numBorders) continue;
|
|
//never clip against the back side
|
|
if (hitnum == facet->numBorders - 1) continue;
|
|
|
|
if (enterFrac < leaveFrac && enterFrac >= 0) {
|
|
if (enterFrac < tw->trace.fraction) {
|
|
if (enterFrac < 0) {
|
|
enterFrac = 0;
|
|
}
|
|
#ifndef BSPC
|
|
if (!cv) {
|
|
cv = Cvar_Get( "r_debugSurfaceUpdate", "1", 0 );
|
|
}
|
|
if (cv && cv->integer) {
|
|
debugPatchCollide = pc;
|
|
debugFacet = facet;
|
|
}
|
|
#endif //BSPC
|
|
|
|
tw->trace.fraction = enterFrac;
|
|
VectorCopy( bestplane, tw->trace.plane.normal );
|
|
tw->trace.plane.dist = bestplane[3];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
=======================================================================
|
|
|
|
POSITION TEST
|
|
|
|
=======================================================================
|
|
*/
|
|
|
|
/*
|
|
====================
|
|
CM_PositionTestInPatchCollide
|
|
====================
|
|
*/
|
|
qboolean CM_PositionTestInPatchCollide( traceWork_t *tw, const struct patchCollide_s *pc ) {
|
|
int i, j;
|
|
float offset, t;
|
|
patchPlane_t *planes;
|
|
facet_t *facet;
|
|
float plane[4];
|
|
vec3_t startp;
|
|
|
|
if (tw->isPoint) {
|
|
return qfalse;
|
|
}
|
|
//
|
|
facet = pc->facets;
|
|
for ( i = 0 ; i < pc->numFacets ; i++, facet++ ) {
|
|
planes = &pc->planes[ facet->surfacePlane ];
|
|
VectorCopy(planes->plane, plane);
|
|
plane[3] = planes->plane[3];
|
|
if ( tw->sphere.use ) {
|
|
// adjust the plane distance apropriately for radius
|
|
plane[3] += tw->sphere.radius;
|
|
|
|
// find the closest point on the capsule to the plane
|
|
t = DotProduct( plane, tw->sphere.offset );
|
|
if ( t > 0 ) {
|
|
VectorSubtract( tw->start, tw->sphere.offset, startp );
|
|
}
|
|
else {
|
|
VectorAdd( tw->start, tw->sphere.offset, startp );
|
|
}
|
|
}
|
|
else {
|
|
offset = DotProduct( tw->offsets[ planes->signbits ], plane);
|
|
plane[3] -= offset;
|
|
VectorCopy( tw->start, startp );
|
|
}
|
|
|
|
if ( DotProduct( plane, startp ) - plane[3] > 0.0f ) {
|
|
continue;
|
|
}
|
|
|
|
for ( j = 0; j < facet->numBorders; j++ ) {
|
|
planes = &pc->planes[ facet->borderPlanes[j] ];
|
|
if (facet->borderInward[j]) {
|
|
VectorNegate(planes->plane, plane);
|
|
plane[3] = -planes->plane[3];
|
|
}
|
|
else {
|
|
VectorCopy(planes->plane, plane);
|
|
plane[3] = planes->plane[3];
|
|
}
|
|
if ( tw->sphere.use ) {
|
|
// adjust the plane distance apropriately for radius
|
|
plane[3] += tw->sphere.radius;
|
|
|
|
// find the closest point on the capsule to the plane
|
|
t = DotProduct( plane, tw->sphere.offset );
|
|
if ( t > 0.0f ) {
|
|
VectorSubtract( tw->start, tw->sphere.offset, startp );
|
|
}
|
|
else {
|
|
VectorAdd( tw->start, tw->sphere.offset, startp );
|
|
}
|
|
}
|
|
else {
|
|
// NOTE: this works even though the plane might be flipped because the bbox is centered
|
|
offset = DotProduct( tw->offsets[ planes->signbits ], plane);
|
|
plane[3] += fabs(offset);
|
|
VectorCopy( tw->start, startp );
|
|
}
|
|
|
|
if ( DotProduct( plane, startp ) - plane[3] > 0.0f ) {
|
|
break;
|
|
}
|
|
}
|
|
if (j < facet->numBorders) {
|
|
continue;
|
|
}
|
|
// inside this patch facet
|
|
return qtrue;
|
|
}
|
|
return qfalse;
|
|
}
|
|
|
|
/*
|
|
=======================================================================
|
|
|
|
DEBUGGING
|
|
|
|
=======================================================================
|
|
*/
|
|
|
|
|
|
/*
|
|
==================
|
|
CM_DrawDebugSurface
|
|
|
|
Called from the renderer
|
|
==================
|
|
*/
|
|
#ifndef BSPC
|
|
void BotDrawDebugPolygons(void (*drawPoly)(int color, int numPoints, float *points), int value);
|
|
#endif
|
|
|
|
void CM_DrawDebugSurface( void (*drawPoly)(int color, int numPoints, float *points) ) {
|
|
static cvar_t *cv;
|
|
#ifndef BSPC
|
|
static cvar_t *cv2;
|
|
#endif
|
|
const patchCollide_t *pc;
|
|
facet_t *facet;
|
|
winding_t *w;
|
|
int i, j, k, n;
|
|
int curplanenum, planenum, curinward, inward;
|
|
float plane[4];
|
|
vec3_t mins = {-15, -15, -28}, maxs = {15, 15, 28};
|
|
//vec3_t mins = {0, 0, 0}, maxs = {0, 0, 0};
|
|
vec3_t v1, v2;
|
|
|
|
#ifndef BSPC
|
|
if ( !cv2 )
|
|
{
|
|
cv2 = Cvar_Get( "r_debugSurface", "0", 0 );
|
|
}
|
|
|
|
if (cv2->integer != 1)
|
|
{
|
|
BotDrawDebugPolygons(drawPoly, cv2->integer);
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
if ( !debugPatchCollide ) {
|
|
return;
|
|
}
|
|
|
|
#ifndef BSPC
|
|
if ( !cv ) {
|
|
cv = Cvar_Get( "cm_debugSize", "2", 0 );
|
|
}
|
|
#endif
|
|
pc = debugPatchCollide;
|
|
|
|
for ( i = 0, facet = pc->facets ; i < pc->numFacets ; i++, facet++ ) {
|
|
|
|
for ( k = 0 ; k < facet->numBorders + 1; k++ ) {
|
|
//
|
|
if (k < facet->numBorders) {
|
|
planenum = facet->borderPlanes[k];
|
|
inward = facet->borderInward[k];
|
|
}
|
|
else {
|
|
planenum = facet->surfacePlane;
|
|
inward = qfalse;
|
|
//continue;
|
|
}
|
|
|
|
Vector4Copy( pc->planes[ planenum ].plane, plane );
|
|
|
|
//planenum = facet->surfacePlane;
|
|
if ( inward ) {
|
|
VectorSubtract( vec3_origin, plane, plane );
|
|
plane[3] = -plane[3];
|
|
}
|
|
|
|
plane[3] += cv->value;
|
|
//*
|
|
for (n = 0; n < 3; n++)
|
|
{
|
|
if (plane[n] > 0) v1[n] = maxs[n];
|
|
else v1[n] = mins[n];
|
|
} //end for
|
|
VectorNegate(plane, v2);
|
|
plane[3] += fabs(DotProduct(v1, v2));
|
|
//*/
|
|
|
|
w = BaseWindingForPlane( plane, plane[3] );
|
|
for ( j = 0 ; j < facet->numBorders + 1 && w; j++ ) {
|
|
//
|
|
if (j < facet->numBorders) {
|
|
curplanenum = facet->borderPlanes[j];
|
|
curinward = facet->borderInward[j];
|
|
}
|
|
else {
|
|
curplanenum = facet->surfacePlane;
|
|
curinward = qfalse;
|
|
//continue;
|
|
}
|
|
//
|
|
if (curplanenum == planenum) continue;
|
|
|
|
Vector4Copy( pc->planes[ curplanenum ].plane, plane );
|
|
if ( !curinward ) {
|
|
VectorSubtract( vec3_origin, plane, plane );
|
|
plane[3] = -plane[3];
|
|
}
|
|
// if ( !facet->borderNoAdjust[j] ) {
|
|
plane[3] -= cv->value;
|
|
// }
|
|
for (n = 0; n < 3; n++)
|
|
{
|
|
if (plane[n] > 0) v1[n] = maxs[n];
|
|
else v1[n] = mins[n];
|
|
} //end for
|
|
VectorNegate(plane, v2);
|
|
plane[3] -= fabs(DotProduct(v1, v2));
|
|
|
|
ChopWindingInPlace( &w, plane, plane[3], 0.1f );
|
|
}
|
|
if ( w ) {
|
|
if ( facet == debugFacet ) {
|
|
drawPoly( 4, w->numpoints, w->p[0] );
|
|
//Com_Printf("blue facet has %d border planes\n", facet->numBorders);
|
|
} else {
|
|
drawPoly( 1, w->numpoints, w->p[0] );
|
|
}
|
|
FreeWinding( w );
|
|
}
|
|
else
|
|
Com_Printf("winding chopped away by border planes\n");
|
|
}
|
|
}
|
|
|
|
// draw the debug block
|
|
{
|
|
vec3_t v[3];
|
|
|
|
VectorCopy( debugBlockPoints[0], v[0] );
|
|
VectorCopy( debugBlockPoints[1], v[1] );
|
|
VectorCopy( debugBlockPoints[2], v[2] );
|
|
drawPoly( 2, 3, v[0] );
|
|
|
|
VectorCopy( debugBlockPoints[2], v[0] );
|
|
VectorCopy( debugBlockPoints[3], v[1] );
|
|
VectorCopy( debugBlockPoints[0], v[2] );
|
|
drawPoly( 2, 3, v[0] );
|
|
}
|
|
|
|
#if 0
|
|
vec3_t v[4];
|
|
|
|
v[0][0] = pc->bounds[1][0];
|
|
v[0][1] = pc->bounds[1][1];
|
|
v[0][2] = pc->bounds[1][2];
|
|
|
|
v[1][0] = pc->bounds[1][0];
|
|
v[1][1] = pc->bounds[0][1];
|
|
v[1][2] = pc->bounds[1][2];
|
|
|
|
v[2][0] = pc->bounds[0][0];
|
|
v[2][1] = pc->bounds[0][1];
|
|
v[2][2] = pc->bounds[1][2];
|
|
|
|
v[3][0] = pc->bounds[0][0];
|
|
v[3][1] = pc->bounds[1][1];
|
|
v[3][2] = pc->bounds[1][2];
|
|
|
|
drawPoly( 4, v[0] );
|
|
#endif
|
|
}
|