mirror of
https://github.com/Q3Rally-Team/q3rally.git
synced 2024-11-22 20:11:48 +00:00
103 lines
3.1 KiB
C
103 lines
3.1 KiB
C
/*
|
|
===========================================================================
|
|
Copyright (C) 1999-2005 Id Software, Inc.
|
|
|
|
This file is part of Quake III Arena source code.
|
|
|
|
Quake III Arena source code is free software; you can redistribute it
|
|
and/or modify it under the terms of the GNU General Public License as
|
|
published by the Free Software Foundation; either version 2 of the License,
|
|
or (at your option) any later version.
|
|
|
|
Quake III Arena source code is distributed in the hope that it will be
|
|
useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with Quake III Arena source code; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
===========================================================================
|
|
*/
|
|
|
|
//#define CULL_BBOX
|
|
|
|
/*
|
|
|
|
This file does not reference any globals, and has these entry points:
|
|
|
|
void CM_ClearLevelPatches( void );
|
|
struct patchCollide_s *CM_GeneratePatchCollide( int width, int height, const vec3_t *points );
|
|
void CM_TraceThroughPatchCollide( traceWork_t *tw, const struct patchCollide_s *pc );
|
|
qboolean CM_PositionTestInPatchCollide( traceWork_t *tw, const struct patchCollide_s *pc );
|
|
void CM_DrawDebugSurface( void (*drawPoly)(int color, int numPoints, flaot *points) );
|
|
|
|
|
|
Issues for collision against curved surfaces:
|
|
|
|
Surface edges need to be handled differently than surface planes
|
|
|
|
Plane expansion causes raw surfaces to expand past expanded bounding box
|
|
|
|
Position test of a volume against a surface is tricky.
|
|
|
|
Position test of a point against a surface is not well defined, because the surface has no volume.
|
|
|
|
|
|
Tracing leading edge points instead of volumes?
|
|
Position test by tracing corner to corner? (8*7 traces -- ouch)
|
|
|
|
coplanar edges
|
|
triangulated patches
|
|
degenerate patches
|
|
|
|
endcaps
|
|
degenerate
|
|
|
|
WARNING: this may misbehave with meshes that have rows or columns that only
|
|
degenerate a few triangles. Completely degenerate rows and columns are handled
|
|
properly.
|
|
*/
|
|
|
|
|
|
#define MAX_FACETS 1024
|
|
#define MAX_PATCH_PLANES 2048
|
|
|
|
typedef struct {
|
|
float plane[4];
|
|
int signbits; // signx + (signy<<1) + (signz<<2), used as lookup during collision
|
|
} patchPlane_t;
|
|
|
|
typedef struct {
|
|
int surfacePlane;
|
|
int numBorders; // 3 or four + 6 axial bevels + 4 or 3 * 4 edge bevels
|
|
int borderPlanes[4+6+16];
|
|
int borderInward[4+6+16];
|
|
qboolean borderNoAdjust[4+6+16];
|
|
} facet_t;
|
|
|
|
typedef struct patchCollide_s {
|
|
vec3_t bounds[2];
|
|
int numPlanes; // surface planes plus edge planes
|
|
patchPlane_t *planes;
|
|
int numFacets;
|
|
facet_t *facets;
|
|
} patchCollide_t;
|
|
|
|
|
|
#define MAX_GRID_SIZE 129
|
|
|
|
typedef struct {
|
|
int width;
|
|
int height;
|
|
qboolean wrapWidth;
|
|
qboolean wrapHeight;
|
|
vec3_t points[MAX_GRID_SIZE][MAX_GRID_SIZE]; // [width][height]
|
|
} cGrid_t;
|
|
|
|
#define SUBDIVIDE_DISTANCE 16 //4 // never more than this units away from curve
|
|
#define PLANE_TRI_EPSILON 0.1
|
|
#define WRAP_POINT_EPSILON 0.1
|
|
|
|
|
|
struct patchCollide_s *CM_GeneratePatchCollide( int width, int height, vec3_t *points );
|