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https://github.com/UberGames/ioef.git
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668 lines
15 KiB
C
668 lines
15 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 "tr_local.h"
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/*
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=================
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R_CullTriSurf
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Returns true if the grid is completely culled away.
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Also sets the clipped hint bit in tess
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=================
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*/
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static qboolean R_CullTriSurf( srfTriangles_t *cv ) {
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int boxCull;
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boxCull = R_CullLocalBox( cv->bounds );
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if ( boxCull == CULL_OUT ) {
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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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R_CullGrid
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Returns true if the grid is completely culled away.
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Also sets the clipped hint bit in tess
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=================
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*/
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static qboolean R_CullGrid( srfGridMesh_t *cv ) {
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int boxCull;
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int sphereCull;
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if ( r_nocurves->integer ) {
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return qtrue;
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}
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if ( tr.currentEntityNum != REFENTITYNUM_WORLD ) {
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sphereCull = R_CullLocalPointAndRadius( cv->localOrigin, cv->meshRadius );
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} else {
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sphereCull = R_CullPointAndRadius( cv->localOrigin, cv->meshRadius );
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}
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// check for trivial reject
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if ( sphereCull == CULL_OUT )
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{
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tr.pc.c_sphere_cull_patch_out++;
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return qtrue;
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}
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// check bounding box if necessary
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else if ( sphereCull == CULL_CLIP )
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{
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tr.pc.c_sphere_cull_patch_clip++;
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boxCull = R_CullLocalBox( cv->meshBounds );
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if ( boxCull == CULL_OUT )
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{
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tr.pc.c_box_cull_patch_out++;
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return qtrue;
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}
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else if ( boxCull == CULL_IN )
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{
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tr.pc.c_box_cull_patch_in++;
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}
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else
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{
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tr.pc.c_box_cull_patch_clip++;
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}
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}
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else
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{
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tr.pc.c_sphere_cull_patch_in++;
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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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R_CullSurface
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Tries to back face cull surfaces before they are lighted or
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added to the sorting list.
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This will also allow mirrors on both sides of a model without recursion.
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================
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*/
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static qboolean R_CullSurface( surfaceType_t *surface, shader_t *shader ) {
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srfSurfaceFace_t *sface;
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float d;
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if ( r_nocull->integer ) {
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return qfalse;
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}
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if ( *surface == SF_GRID ) {
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return R_CullGrid( (srfGridMesh_t *)surface );
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}
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if ( *surface == SF_TRIANGLES ) {
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return R_CullTriSurf( (srfTriangles_t *)surface );
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}
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if ( *surface != SF_FACE ) {
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return qfalse;
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}
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if ( shader->cullType == CT_TWO_SIDED ) {
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return qfalse;
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}
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// face culling
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if ( !r_facePlaneCull->integer ) {
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return qfalse;
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}
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sface = ( srfSurfaceFace_t * ) surface;
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d = DotProduct (tr.or.viewOrigin, sface->plane.normal);
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// don't cull exactly on the plane, because there are levels of rounding
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// through the BSP, ICD, and hardware that may cause pixel gaps if an
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// epsilon isn't allowed here
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if ( shader->cullType == CT_FRONT_SIDED ) {
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if ( d < sface->plane.dist - 8 ) {
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return qtrue;
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}
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} else {
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if ( d > sface->plane.dist + 8 ) {
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return qtrue;
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}
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}
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return qfalse;
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}
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static int R_DlightFace( srfSurfaceFace_t *face, int dlightBits ) {
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float d;
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int i;
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dlight_t *dl;
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for ( i = 0 ; i < tr.refdef.num_dlights ; i++ ) {
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if ( ! ( dlightBits & ( 1 << i ) ) ) {
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continue;
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}
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dl = &tr.refdef.dlights[i];
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d = DotProduct( dl->origin, face->plane.normal ) - face->plane.dist;
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if ( d < -dl->radius || d > dl->radius ) {
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// dlight doesn't reach the plane
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dlightBits &= ~( 1 << i );
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}
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}
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if ( !dlightBits ) {
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tr.pc.c_dlightSurfacesCulled++;
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}
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face->dlightBits = dlightBits;
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return dlightBits;
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}
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static int R_DlightGrid( srfGridMesh_t *grid, int dlightBits ) {
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int i;
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dlight_t *dl;
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for ( i = 0 ; i < tr.refdef.num_dlights ; i++ ) {
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if ( ! ( dlightBits & ( 1 << i ) ) ) {
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continue;
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}
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dl = &tr.refdef.dlights[i];
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if ( dl->origin[0] - dl->radius > grid->meshBounds[1][0]
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|| dl->origin[0] + dl->radius < grid->meshBounds[0][0]
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|| dl->origin[1] - dl->radius > grid->meshBounds[1][1]
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|| dl->origin[1] + dl->radius < grid->meshBounds[0][1]
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|| dl->origin[2] - dl->radius > grid->meshBounds[1][2]
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|| dl->origin[2] + dl->radius < grid->meshBounds[0][2] ) {
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// dlight doesn't reach the bounds
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dlightBits &= ~( 1 << i );
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}
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}
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if ( !dlightBits ) {
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tr.pc.c_dlightSurfacesCulled++;
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}
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grid->dlightBits = dlightBits;
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return dlightBits;
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}
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static int R_DlightTrisurf( srfTriangles_t *surf, int dlightBits ) {
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// FIXME: more dlight culling to trisurfs...
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surf->dlightBits = dlightBits;
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return dlightBits;
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#if 0
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int i;
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dlight_t *dl;
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for ( i = 0 ; i < tr.refdef.num_dlights ; i++ ) {
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if ( ! ( dlightBits & ( 1 << i ) ) ) {
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continue;
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}
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dl = &tr.refdef.dlights[i];
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if ( dl->origin[0] - dl->radius > grid->meshBounds[1][0]
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|| dl->origin[0] + dl->radius < grid->meshBounds[0][0]
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|| dl->origin[1] - dl->radius > grid->meshBounds[1][1]
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|| dl->origin[1] + dl->radius < grid->meshBounds[0][1]
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|| dl->origin[2] - dl->radius > grid->meshBounds[1][2]
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|| dl->origin[2] + dl->radius < grid->meshBounds[0][2] ) {
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// dlight doesn't reach the bounds
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dlightBits &= ~( 1 << i );
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}
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}
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if ( !dlightBits ) {
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tr.pc.c_dlightSurfacesCulled++;
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}
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grid->dlightBits = dlightBits;
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return dlightBits;
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#endif
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}
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/*
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====================
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R_DlightSurface
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The given surface is going to be drawn, and it touches a leaf
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that is touched by one or more dlights, so try to throw out
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more dlights if possible.
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====================
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*/
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static int R_DlightSurface( msurface_t *surf, int dlightBits ) {
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if ( *surf->data == SF_FACE ) {
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dlightBits = R_DlightFace( (srfSurfaceFace_t *)surf->data, dlightBits );
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} else if ( *surf->data == SF_GRID ) {
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dlightBits = R_DlightGrid( (srfGridMesh_t *)surf->data, dlightBits );
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} else if ( *surf->data == SF_TRIANGLES ) {
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dlightBits = R_DlightTrisurf( (srfTriangles_t *)surf->data, dlightBits );
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} else {
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dlightBits = 0;
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}
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if ( dlightBits ) {
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tr.pc.c_dlightSurfaces++;
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}
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return dlightBits;
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}
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/*
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======================
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R_AddWorldSurface
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======================
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*/
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static void R_AddWorldSurface( msurface_t *surf, int dlightBits ) {
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if ( surf->viewCount == tr.viewCount ) {
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return; // already in this view
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}
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surf->viewCount = tr.viewCount;
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// FIXME: bmodel fog?
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// try to cull before dlighting or adding
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if ( R_CullSurface( surf->data, surf->shader ) ) {
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return;
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}
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// check for dlighting
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if ( dlightBits ) {
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dlightBits = R_DlightSurface( surf, dlightBits );
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dlightBits = ( dlightBits != 0 );
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}
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R_AddDrawSurf( surf->data, surf->shader, surf->fogIndex, dlightBits );
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}
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/*
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=============================================================
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BRUSH MODELS
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=============================================================
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*/
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/*
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=================
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R_AddBrushModelSurfaces
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=================
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*/
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void R_AddBrushModelSurfaces ( trRefEntity_t *ent ) {
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bmodel_t *bmodel;
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int clip;
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model_t *pModel;
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int i;
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pModel = R_GetModelByHandle( ent->e.hModel );
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bmodel = pModel->bmodel;
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clip = R_CullLocalBox( bmodel->bounds );
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if ( clip == CULL_OUT ) {
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return;
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}
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R_SetupEntityLighting( &tr.refdef, ent );
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R_DlightBmodel( bmodel );
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for ( i = 0 ; i < bmodel->numSurfaces ; i++ ) {
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R_AddWorldSurface( bmodel->firstSurface + i, tr.currentEntity->needDlights );
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}
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}
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/*
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=============================================================
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WORLD MODEL
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=============================================================
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*/
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/*
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================
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R_RecursiveWorldNode
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================
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*/
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static void R_RecursiveWorldNode( mnode_t *node, int planeBits, int dlightBits ) {
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do {
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int newDlights[2];
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// if the node wasn't marked as potentially visible, exit
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if (node->visframe != tr.visCount) {
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return;
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}
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// if the bounding volume is outside the frustum, nothing
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// inside can be visible OPTIMIZE: don't do this all the way to leafs?
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if ( !r_nocull->integer ) {
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int r;
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if ( planeBits & 1 ) {
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r = BoxOnPlaneSide(node->mins, node->maxs, &tr.viewParms.frustum[0]);
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if (r == 2) {
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return; // culled
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}
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if ( r == 1 ) {
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planeBits &= ~1; // all descendants will also be in front
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}
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}
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if ( planeBits & 2 ) {
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r = BoxOnPlaneSide(node->mins, node->maxs, &tr.viewParms.frustum[1]);
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if (r == 2) {
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return; // culled
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}
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if ( r == 1 ) {
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planeBits &= ~2; // all descendants will also be in front
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}
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}
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if ( planeBits & 4 ) {
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r = BoxOnPlaneSide(node->mins, node->maxs, &tr.viewParms.frustum[2]);
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if (r == 2) {
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return; // culled
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}
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if ( r == 1 ) {
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planeBits &= ~4; // all descendants will also be in front
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}
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}
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if ( planeBits & 8 ) {
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r = BoxOnPlaneSide(node->mins, node->maxs, &tr.viewParms.frustum[3]);
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if (r == 2) {
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return; // culled
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}
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if ( r == 1 ) {
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planeBits &= ~8; // all descendants will also be in front
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}
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}
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}
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if ( node->contents != -1 ) {
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break;
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}
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// node is just a decision point, so go down both sides
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// since we don't care about sort orders, just go positive to negative
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// determine which dlights are needed
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newDlights[0] = 0;
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newDlights[1] = 0;
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if ( dlightBits ) {
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int i;
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for ( i = 0 ; i < tr.refdef.num_dlights ; i++ ) {
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dlight_t *dl;
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float dist;
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if ( dlightBits & ( 1 << i ) ) {
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dl = &tr.refdef.dlights[i];
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dist = DotProduct( dl->origin, node->plane->normal ) - node->plane->dist;
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if ( dist > -dl->radius ) {
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newDlights[0] |= ( 1 << i );
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}
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if ( dist < dl->radius ) {
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newDlights[1] |= ( 1 << i );
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}
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}
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}
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}
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// recurse down the children, front side first
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R_RecursiveWorldNode (node->children[0], planeBits, newDlights[0] );
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// tail recurse
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node = node->children[1];
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dlightBits = newDlights[1];
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} while ( 1 );
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{
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// leaf node, so add mark surfaces
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int c;
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msurface_t *surf, **mark;
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tr.pc.c_leafs++;
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// add to z buffer bounds
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if ( node->mins[0] < tr.viewParms.visBounds[0][0] ) {
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tr.viewParms.visBounds[0][0] = node->mins[0];
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}
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if ( node->mins[1] < tr.viewParms.visBounds[0][1] ) {
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tr.viewParms.visBounds[0][1] = node->mins[1];
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}
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if ( node->mins[2] < tr.viewParms.visBounds[0][2] ) {
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tr.viewParms.visBounds[0][2] = node->mins[2];
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}
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if ( node->maxs[0] > tr.viewParms.visBounds[1][0] ) {
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tr.viewParms.visBounds[1][0] = node->maxs[0];
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}
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if ( node->maxs[1] > tr.viewParms.visBounds[1][1] ) {
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tr.viewParms.visBounds[1][1] = node->maxs[1];
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}
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if ( node->maxs[2] > tr.viewParms.visBounds[1][2] ) {
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tr.viewParms.visBounds[1][2] = node->maxs[2];
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}
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// add the individual surfaces
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mark = node->firstmarksurface;
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c = node->nummarksurfaces;
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while (c--) {
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// the surface may have already been added if it
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// spans multiple leafs
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surf = *mark;
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R_AddWorldSurface( surf, dlightBits );
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mark++;
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}
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}
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}
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/*
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===============
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R_PointInLeaf
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===============
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*/
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static mnode_t *R_PointInLeaf( const vec3_t p ) {
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mnode_t *node;
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float d;
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cplane_t *plane;
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if ( !tr.world ) {
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ri.Error (ERR_DROP, "R_PointInLeaf: bad model");
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}
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node = tr.world->nodes;
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while( 1 ) {
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if (node->contents != -1) {
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break;
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}
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plane = node->plane;
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d = DotProduct (p,plane->normal) - plane->dist;
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if (d > 0) {
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node = node->children[0];
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} else {
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node = node->children[1];
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}
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}
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return node;
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}
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/*
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==============
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R_ClusterPVS
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==============
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*/
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static const byte *R_ClusterPVS (int cluster) {
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if (!tr.world || !tr.world->vis || cluster < 0 || cluster >= tr.world->numClusters ) {
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return tr.world->novis;
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}
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return tr.world->vis + cluster * tr.world->clusterBytes;
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}
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/*
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=================
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R_inPVS
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=================
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*/
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qboolean R_inPVS( const vec3_t p1, const vec3_t p2 ) {
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mnode_t *leaf;
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byte *vis;
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leaf = R_PointInLeaf( p1 );
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vis = ri.CM_ClusterPVS( leaf->cluster ); // why not R_ClusterPVS ??
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leaf = R_PointInLeaf( p2 );
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if ( !(vis[leaf->cluster>>3] & (1<<(leaf->cluster&7))) ) {
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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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R_MarkLeaves
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Mark the leaves and nodes that are in the PVS for the current
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cluster
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===============
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*/
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static void R_MarkLeaves (void) {
|
|
const byte *vis;
|
|
mnode_t *leaf, *parent;
|
|
int i;
|
|
int cluster;
|
|
|
|
// lockpvs lets designers walk around to determine the
|
|
// extent of the current pvs
|
|
if ( r_lockpvs->integer ) {
|
|
return;
|
|
}
|
|
|
|
// current viewcluster
|
|
leaf = R_PointInLeaf( tr.viewParms.pvsOrigin );
|
|
cluster = leaf->cluster;
|
|
|
|
// if the cluster is the same and the area visibility matrix
|
|
// hasn't changed, we don't need to mark everything again
|
|
|
|
// if r_showcluster was just turned on, remark everything
|
|
if ( tr.viewCluster == cluster && !tr.refdef.areamaskModified
|
|
&& !r_showcluster->modified ) {
|
|
return;
|
|
}
|
|
|
|
if ( r_showcluster->modified || r_showcluster->integer ) {
|
|
r_showcluster->modified = qfalse;
|
|
if ( r_showcluster->integer ) {
|
|
ri.Printf( PRINT_ALL, "cluster:%i area:%i\n", cluster, leaf->area );
|
|
}
|
|
}
|
|
|
|
tr.visCount++;
|
|
tr.viewCluster = cluster;
|
|
|
|
if ( r_novis->integer || tr.viewCluster == -1 ) {
|
|
for (i=0 ; i<tr.world->numnodes ; i++) {
|
|
if (tr.world->nodes[i].contents != CONTENTS_SOLID) {
|
|
tr.world->nodes[i].visframe = tr.visCount;
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
vis = R_ClusterPVS (tr.viewCluster);
|
|
|
|
for (i=0,leaf=tr.world->nodes ; i<tr.world->numnodes ; i++, leaf++) {
|
|
cluster = leaf->cluster;
|
|
if ( cluster < 0 || cluster >= tr.world->numClusters ) {
|
|
continue;
|
|
}
|
|
|
|
// check general pvs
|
|
if ( !(vis[cluster>>3] & (1<<(cluster&7))) ) {
|
|
continue;
|
|
}
|
|
|
|
// check for door connection
|
|
if ( (tr.refdef.areamask[leaf->area>>3] & (1<<(leaf->area&7)) ) ) {
|
|
continue; // not visible
|
|
}
|
|
|
|
parent = leaf;
|
|
do {
|
|
if (parent->visframe == tr.visCount)
|
|
break;
|
|
parent->visframe = tr.visCount;
|
|
parent = parent->parent;
|
|
} while (parent);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
=============
|
|
R_AddWorldSurfaces
|
|
=============
|
|
*/
|
|
void R_AddWorldSurfaces (void) {
|
|
if ( !r_drawworld->integer ) {
|
|
return;
|
|
}
|
|
|
|
if ( tr.refdef.rdflags & RDF_NOWORLDMODEL ) {
|
|
return;
|
|
}
|
|
|
|
tr.currentEntityNum = REFENTITYNUM_WORLD;
|
|
tr.shiftedEntityNum = tr.currentEntityNum << QSORT_REFENTITYNUM_SHIFT;
|
|
|
|
// determine which leaves are in the PVS / areamask
|
|
R_MarkLeaves ();
|
|
|
|
// clear out the visible min/max
|
|
ClearBounds( tr.viewParms.visBounds[0], tr.viewParms.visBounds[1] );
|
|
|
|
// perform frustum culling and add all the potentially visible surfaces
|
|
if ( tr.refdef.num_dlights > 32 ) {
|
|
tr.refdef.num_dlights = 32 ;
|
|
}
|
|
R_RecursiveWorldNode( tr.world->nodes, 15, ( 1 << tr.refdef.num_dlights ) - 1 );
|
|
}
|