diff options
Diffstat (limited to 'ioq3-r437/src/renderer/tr_shadows.c')
| -rw-r--r-- | ioq3-r437/src/renderer/tr_shadows.c | 341 |
1 files changed, 0 insertions, 341 deletions
diff --git a/ioq3-r437/src/renderer/tr_shadows.c b/ioq3-r437/src/renderer/tr_shadows.c deleted file mode 100644 index 1162c8fd..00000000 --- a/ioq3-r437/src/renderer/tr_shadows.c +++ /dev/null @@ -1,341 +0,0 @@ -/* -=========================================================================== -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 -=========================================================================== -*/ -#include "tr_local.h" - - -/* - - for a projection shadow: - - point[x] += light vector * ( z - shadow plane ) - point[y] += - point[z] = shadow plane - - 1 0 light[x] / light[z] - -*/ - -typedef struct { - int i2; - int facing; -} edgeDef_t; - -#define MAX_EDGE_DEFS 32 - -static edgeDef_t edgeDefs[SHADER_MAX_VERTEXES][MAX_EDGE_DEFS]; -static int numEdgeDefs[SHADER_MAX_VERTEXES]; -static int facing[SHADER_MAX_INDEXES/3]; - -void R_AddEdgeDef( int i1, int i2, int facing ) { - int c; - - c = numEdgeDefs[ i1 ]; - if ( c == MAX_EDGE_DEFS ) { - return; // overflow - } - edgeDefs[ i1 ][ c ].i2 = i2; - edgeDefs[ i1 ][ c ].facing = facing; - - numEdgeDefs[ i1 ]++; -} - -void R_RenderShadowEdges( void ) { - int i; - -#if 0 - int numTris; - - // dumb way -- render every triangle's edges - numTris = tess.numIndexes / 3; - - for ( i = 0 ; i < numTris ; i++ ) { - int i1, i2, i3; - - if ( !facing[i] ) { - continue; - } - - i1 = tess.indexes[ i*3 + 0 ]; - i2 = tess.indexes[ i*3 + 1 ]; - i3 = tess.indexes[ i*3 + 2 ]; - - qglBegin( GL_TRIANGLE_STRIP ); - qglVertex3fv( tess.xyz[ i1 ] ); - qglVertex3fv( tess.xyz[ i1 + tess.numVertexes ] ); - qglVertex3fv( tess.xyz[ i2 ] ); - qglVertex3fv( tess.xyz[ i2 + tess.numVertexes ] ); - qglVertex3fv( tess.xyz[ i3 ] ); - qglVertex3fv( tess.xyz[ i3 + tess.numVertexes ] ); - qglVertex3fv( tess.xyz[ i1 ] ); - qglVertex3fv( tess.xyz[ i1 + tess.numVertexes ] ); - qglEnd(); - } -#else - int c, c2; - int j, k; - int i2; - int c_edges, c_rejected; - int hit[2]; - - // an edge is NOT a silhouette edge if its face doesn't face the light, - // or if it has a reverse paired edge that also faces the light. - // A well behaved polyhedron would have exactly two faces for each edge, - // but lots of models have dangling edges or overfanned edges - c_edges = 0; - c_rejected = 0; - - for ( i = 0 ; i < tess.numVertexes ; i++ ) { - c = numEdgeDefs[ i ]; - for ( j = 0 ; j < c ; j++ ) { - if ( !edgeDefs[ i ][ j ].facing ) { - continue; - } - - hit[0] = 0; - hit[1] = 0; - - i2 = edgeDefs[ i ][ j ].i2; - c2 = numEdgeDefs[ i2 ]; - for ( k = 0 ; k < c2 ; k++ ) { - if ( edgeDefs[ i2 ][ k ].i2 == i ) { - hit[ edgeDefs[ i2 ][ k ].facing ]++; - } - } - - // if it doesn't share the edge with another front facing - // triangle, it is a sil edge - if ( hit[ 1 ] == 0 ) { - qglBegin( GL_TRIANGLE_STRIP ); - qglVertex3fv( tess.xyz[ i ] ); - qglVertex3fv( tess.xyz[ i + tess.numVertexes ] ); - qglVertex3fv( tess.xyz[ i2 ] ); - qglVertex3fv( tess.xyz[ i2 + tess.numVertexes ] ); - qglEnd(); - c_edges++; - } else { - c_rejected++; - } - } - } -#endif -} - -/* -================= -RB_ShadowTessEnd - -triangleFromEdge[ v1 ][ v2 ] - - - set triangle from edge( v1, v2, tri ) - if ( facing[ triangleFromEdge[ v1 ][ v2 ] ] && !facing[ triangleFromEdge[ v2 ][ v1 ] ) { - } -================= -*/ -void RB_ShadowTessEnd( void ) { - int i; - int numTris; - vec3_t lightDir; - - // we can only do this if we have enough space in the vertex buffers - if ( tess.numVertexes >= SHADER_MAX_VERTEXES / 2 ) { - return; - } - - if ( glConfig.stencilBits < 4 ) { - return; - } - - VectorCopy( backEnd.currentEntity->lightDir, lightDir ); - - // project vertexes away from light direction - for ( i = 0 ; i < tess.numVertexes ; i++ ) { - VectorMA( tess.xyz[i], -512, lightDir, tess.xyz[i+tess.numVertexes] ); - } - - // decide which triangles face the light - Com_Memset( numEdgeDefs, 0, 4 * tess.numVertexes ); - - numTris = tess.numIndexes / 3; - for ( i = 0 ; i < numTris ; i++ ) { - int i1, i2, i3; - vec3_t d1, d2, normal; - float *v1, *v2, *v3; - float d; - - i1 = tess.indexes[ i*3 + 0 ]; - i2 = tess.indexes[ i*3 + 1 ]; - i3 = tess.indexes[ i*3 + 2 ]; - - v1 = tess.xyz[ i1 ]; - v2 = tess.xyz[ i2 ]; - v3 = tess.xyz[ i3 ]; - - VectorSubtract( v2, v1, d1 ); - VectorSubtract( v3, v1, d2 ); - CrossProduct( d1, d2, normal ); - - d = DotProduct( normal, lightDir ); - if ( d > 0 ) { - facing[ i ] = 1; - } else { - facing[ i ] = 0; - } - - // create the edges - R_AddEdgeDef( i1, i2, facing[ i ] ); - R_AddEdgeDef( i2, i3, facing[ i ] ); - R_AddEdgeDef( i3, i1, facing[ i ] ); - } - - // draw the silhouette edges - - GL_Bind( tr.whiteImage ); - qglEnable( GL_CULL_FACE ); - GL_State( GLS_SRCBLEND_ONE | GLS_DSTBLEND_ZERO ); - qglColor3f( 0.2f, 0.2f, 0.2f ); - - // don't write to the color buffer - qglColorMask( GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE ); - - qglEnable( GL_STENCIL_TEST ); - qglStencilFunc( GL_ALWAYS, 1, 255 ); - - // mirrors have the culling order reversed - if ( backEnd.viewParms.isMirror ) { - qglCullFace( GL_FRONT ); - qglStencilOp( GL_KEEP, GL_KEEP, GL_INCR ); - - R_RenderShadowEdges(); - - qglCullFace( GL_BACK ); - qglStencilOp( GL_KEEP, GL_KEEP, GL_DECR ); - - R_RenderShadowEdges(); - } else { - qglCullFace( GL_BACK ); - qglStencilOp( GL_KEEP, GL_KEEP, GL_INCR ); - - R_RenderShadowEdges(); - - qglCullFace( GL_FRONT ); - qglStencilOp( GL_KEEP, GL_KEEP, GL_DECR ); - - R_RenderShadowEdges(); - } - - - // reenable writing to the color buffer - qglColorMask( GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE ); -} - - -/* -================= -RB_ShadowFinish - -Darken everything that is is a shadow volume. -We have to delay this until everything has been shadowed, -because otherwise shadows from different body parts would -overlap and double darken. -================= -*/ -void RB_ShadowFinish( void ) { - if ( r_shadows->integer != 2 ) { - return; - } - if ( glConfig.stencilBits < 4 ) { - return; - } - qglEnable( GL_STENCIL_TEST ); - qglStencilFunc( GL_NOTEQUAL, 0, 255 ); - - qglDisable (GL_CLIP_PLANE0); - qglDisable (GL_CULL_FACE); - - GL_Bind( tr.whiteImage ); - - qglLoadIdentity (); - - qglColor3f( 0.6f, 0.6f, 0.6f ); - GL_State( GLS_DEPTHMASK_TRUE | GLS_SRCBLEND_DST_COLOR | GLS_DSTBLEND_ZERO ); - -// qglColor3f( 1, 0, 0 ); -// GL_State( GLS_DEPTHMASK_TRUE | GLS_SRCBLEND_ONE | GLS_DSTBLEND_ZERO ); - - qglBegin( GL_QUADS ); - qglVertex3f( -100, 100, -10 ); - qglVertex3f( 100, 100, -10 ); - qglVertex3f( 100, -100, -10 ); - qglVertex3f( -100, -100, -10 ); - qglEnd (); - - qglColor4f(1,1,1,1); - qglDisable( GL_STENCIL_TEST ); -} - - -/* -================= -RB_ProjectionShadowDeform - -================= -*/ -void RB_ProjectionShadowDeform( void ) { - float *xyz; - int i; - float h; - vec3_t ground; - vec3_t light; - float groundDist; - float d; - vec3_t lightDir; - - xyz = ( float * ) tess.xyz; - - ground[0] = backEnd.or.axis[0][2]; - ground[1] = backEnd.or.axis[1][2]; - ground[2] = backEnd.or.axis[2][2]; - - groundDist = backEnd.or.origin[2] - backEnd.currentEntity->e.shadowPlane; - - VectorCopy( backEnd.currentEntity->lightDir, lightDir ); - d = DotProduct( lightDir, ground ); - // don't let the shadows get too long or go negative - if ( d < 0.5 ) { - VectorMA( lightDir, (0.5 - d), ground, lightDir ); - d = DotProduct( lightDir, ground ); - } - d = 1.0 / d; - - light[0] = lightDir[0] * d; - light[1] = lightDir[1] * d; - light[2] = lightDir[2] * d; - - for ( i = 0; i < tess.numVertexes; i++, xyz += 4 ) { - h = DotProduct( xyz, ground ) + groundDist; - - xyz[0] -= light[0] * h; - xyz[1] -= light[1] * h; - xyz[2] -= light[2] * h; - } -} |