+++ /dev/null
-/* -------------------------------------------------------------------------------
-
-Copyright (C) 1999-2007 id Software, Inc. and contributors.
-For a list of contributors, see the accompanying CONTRIBUTORS file.
-
-This file is part of GtkRadiant.
-
-GtkRadiant 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.
-
-GtkRadiant 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 GtkRadiant; if not, write to the Free Software
-Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-
-----------------------------------------------------------------------------------
-
-This code has been altered significantly from its original form, to support
-several games based on the Quake III Arena engine, in the form of "Q3Map2."
-
-------------------------------------------------------------------------------- */
-
-
-
-/* marker */
-#define DECALS_C
-
-
-
-/* dependencies */
-#include "q3map2.h"
-
-
-
-#define MAX_PROJECTORS 1024
-
-typedef struct decalProjector_s
-{
- shaderInfo_t *si;
- vec3_t mins, maxs;
- vec3_t center;
- float radius, radius2;
- int numPlanes; /* either 5 or 6, for quad or triangle projectors */
- vec4_t planes[ 6 ];
- vec4_t texMat[ 2 ];
-}
-decalProjector_t;
-
-static int numProjectors = 0;
-static decalProjector_t projectors[ MAX_PROJECTORS ];
-
-static int numDecalSurfaces = 0;
-
-static vec3_t entityOrigin;
-
-
-
-/*
-DVectorNormalize()
-normalizes a vector, returns the length, operates using doubles
-*/
-
-typedef double dvec_t;
-typedef dvec_t dvec3_t[ 3 ];
-
-dvec_t DVectorNormalize( dvec3_t in, dvec3_t out )
-{
- dvec_t len, ilen;
-
-
- len = (dvec_t) sqrt( in[ 0 ] * in[ 0 ] + in[ 1 ] * in[ 1 ] + in[ 2 ] * in[ 2 ] );
- if( len == 0.0 )
- {
- VectorClear( out );
- return 0.0;
- }
-
- ilen = 1.0 / len;
- out[ 0 ] = in[ 0 ] * ilen;
- out[ 1 ] = in[ 1 ] * ilen;
- out[ 2 ] = in[ 2 ] * ilen;
-
- return len;
-}
-
-
-
-/*
-MakeTextureMatrix()
-generates a texture projection matrix for a triangle
-returns qfalse if a texture matrix cannot be created
-*/
-
-#define Vector2Subtract(a,b,c) ((c)[ 0 ] = (a)[ 0 ] - (b)[ 0 ], (c)[ 1 ] = (a)[ 1 ] - (b)[ 1 ])
-
-static qboolean MakeTextureMatrix( decalProjector_t *dp, vec4_t projection, bspDrawVert_t *a, bspDrawVert_t *b, bspDrawVert_t *c )
-{
- int i, j;
- double bb, s, t, d;
- dvec3_t pa, pb, pc;
- dvec3_t bary, xyz;
- dvec3_t vecs[ 3 ], axis[ 3 ], lengths;
-
-
- /* project triangle onto plane of projection */
- d = DotProduct( a->xyz, projection ) - projection[ 3 ];
- VectorMA( a->xyz, -d, projection, pa );
- d = DotProduct( b->xyz, projection ) - projection[ 3 ];
- VectorMA( b->xyz, -d, projection, pb );
- d = DotProduct( c->xyz, projection ) - projection[ 3 ];
- VectorMA( c->xyz, -d, projection, pc );
-
- /* two methods */
- #if 1
- {
- /* old code */
-
- /* calculate barycentric basis for the triangle */
- bb = (b->st[ 0 ] - a->st[ 0 ]) * (c->st[ 1 ] - a->st[ 1 ]) - (c->st[ 0 ] - a->st[ 0 ]) * (b->st[ 1 ] - a->st[ 1 ]);
- if( fabs( bb ) < 0.00000001 )
- return qfalse;
-
- /* calculate texture origin */
- #if 0
- s = 0.0;
- t = 0.0;
- bary[ 0 ] = ((b->st[ 0 ] - s) * (c->st[ 1 ] - t) - (c->st[ 0 ] - s) * (b->st[ 1 ] - t)) / bb;
- bary[ 1 ] = ((c->st[ 0 ] - s) * (a->st[ 1 ] - t) - (a->st[ 0 ] - s) * (c->st[ 1 ] - t)) / bb;
- bary[ 2 ] = ((a->st[ 0 ] - s) * (b->st[ 1 ] - t) - (b->st[ 0 ] - s) * (a->st[ 1 ] - t)) / bb;
-
- origin[ 0 ] = bary[ 0 ] * pa[ 0 ] + bary[ 1 ] * pb[ 0 ] + bary[ 2 ] * pc[ 0 ];
- origin[ 1 ] = bary[ 0 ] * pa[ 1 ] + bary[ 1 ] * pb[ 1 ] + bary[ 2 ] * pc[ 1 ];
- origin[ 2 ] = bary[ 0 ] * pa[ 2 ] + bary[ 1 ] * pb[ 2 ] + bary[ 2 ] * pc[ 2 ];
- #endif
-
- /* calculate s vector */
- s = a->st[ 0 ] + 1.0;
- t = a->st[ 1 ] + 0.0;
- bary[ 0 ] = ((b->st[ 0 ] - s) * (c->st[ 1 ] - t) - (c->st[ 0 ] - s) * (b->st[ 1 ] - t)) / bb;
- bary[ 1 ] = ((c->st[ 0 ] - s) * (a->st[ 1 ] - t) - (a->st[ 0 ] - s) * (c->st[ 1 ] - t)) / bb;
- bary[ 2 ] = ((a->st[ 0 ] - s) * (b->st[ 1 ] - t) - (b->st[ 0 ] - s) * (a->st[ 1 ] - t)) / bb;
-
- xyz[ 0 ] = bary[ 0 ] * pa[ 0 ] + bary[ 1 ] * pb[ 0 ] + bary[ 2 ] * pc[ 0 ];
- xyz[ 1 ] = bary[ 0 ] * pa[ 1 ] + bary[ 1 ] * pb[ 1 ] + bary[ 2 ] * pc[ 1 ];
- xyz[ 2 ] = bary[ 0 ] * pa[ 2 ] + bary[ 1 ] * pb[ 2 ] + bary[ 2 ] * pc[ 2 ];
-
- //% VectorSubtract( xyz, origin, vecs[ 0 ] );
- VectorSubtract( xyz, pa, vecs[ 0 ] );
-
- /* calculate t vector */
- s = a->st[ 0 ] + 0.0;
- t = a->st[ 1 ] + 1.0;
- bary[ 0 ] = ((b->st[ 0 ] - s) * (c->st[ 1 ] - t) - (c->st[ 0 ] - s) * (b->st[ 1 ] - t)) / bb;
- bary[ 1 ] = ((c->st[ 0 ] - s) * (a->st[ 1 ] - t) - (a->st[ 0 ] - s) * (c->st[ 1 ] - t)) / bb;
- bary[ 2 ] = ((a->st[ 0 ] - s) * (b->st[ 1 ] - t) - (b->st[ 0 ] - s) * (a->st[ 1 ] - t)) / bb;
-
- xyz[ 0 ] = bary[ 0 ] * pa[ 0 ] + bary[ 1 ] * pb[ 0 ] + bary[ 2 ] * pc[ 0 ];
- xyz[ 1 ] = bary[ 0 ] * pa[ 1 ] + bary[ 1 ] * pb[ 1 ] + bary[ 2 ] * pc[ 1 ];
- xyz[ 2 ] = bary[ 0 ] * pa[ 2 ] + bary[ 1 ] * pb[ 2 ] + bary[ 2 ] * pc[ 2 ];
-
- //% VectorSubtract( xyz, origin, vecs[ 1 ] );
- VectorSubtract( xyz, pa, vecs[ 1 ] );
-
- /* calcuate r vector */
- VectorScale( projection, -1.0, vecs[ 2 ] );
-
- /* calculate transform axis */
- for( i = 0; i < 3; i++ )
- lengths[ i ] = DVectorNormalize( vecs[ i ], axis[ i ] );
- for( i = 0; i < 2; i++ )
- for( j = 0; j < 3; j++ )
- dp->texMat[ i ][ j ] = lengths[ i ] > 0.0 ? (axis[ i ][ j ] / lengths[ i ]) : 0.0;
- //% dp->texMat[ i ][ j ] = fabs( vecs[ i ][ j ] ) > 0.0 ? (1.0 / vecs[ i ][ j ]) : 0.0;
- //% dp->texMat[ i ][ j ] = axis[ i ][ j ] > 0.0 ? (1.0 / axis[ i ][ j ]) : 0.0;
-
- /* calculalate translation component */
- dp->texMat[ 0 ][ 3 ] = a->st[ 0 ] - DotProduct( a->xyz, dp->texMat[ 0 ] );
- dp->texMat[ 1 ][ 3 ] = a->st[ 1 ] - DotProduct( a->xyz, dp->texMat[ 1 ] );
- }
- #else
- {
- int k;
- dvec3_t origin, deltas[ 3 ];
- double texDeltas[ 3 ][ 2 ];
- double delta, texDelta;
-
-
- /* new code */
-
- /* calculate deltas */
- VectorSubtract( pa, pb, deltas[ 0 ] );
- VectorSubtract( pa, pc, deltas[ 1 ] );
- VectorSubtract( pb, pc, deltas[ 2 ] );
- Vector2Subtract( a->st, b->st, texDeltas[ 0 ] );
- Vector2Subtract( a->st, c->st, texDeltas[ 1 ] );
- Vector2Subtract( b->st, c->st, texDeltas[ 2 ] );
-
- /* walk st */
- for( i = 0; i < 2; i++ )
- {
- /* walk xyz */
- for( j = 0; j < 3; j++ )
- {
- /* clear deltas */
- delta = 0.0;
- texDelta = 0.0;
-
- /* walk deltas */
- for( k = 0; k < 3; k++ )
- {
- if( fabs( deltas[ k ][ j ] ) > delta &&
- fabs( texDeltas[ k ][ i ] ) > texDelta )
- {
- delta = deltas[ k ][ j ];
- texDelta = texDeltas[ k ][ i ];
- }
- }
-
- /* set texture matrix component */
- if( fabs( delta ) > 0.0 )
- dp->texMat[ i ][ j ] = texDelta / delta;
- else
- dp->texMat[ i ][ j ] = 0.0;
- }
-
- /* set translation component */
- dp->texMat[ i ][ 3 ] = a->st[ i ] - DotProduct( pa, dp->texMat[ i ] );
- }
- }
- #endif
-
- /* debug code */
- #if 1
- Sys_Printf( "Mat: [ %f %f %f %f ] [ %f %f %f %f ] Theta: %f (%f)\n",
- dp->texMat[ 0 ][ 0 ], dp->texMat[ 0 ][ 1 ], dp->texMat[ 0 ][ 2 ], dp->texMat[ 0 ][ 3 ],
- dp->texMat[ 1 ][ 0 ], dp->texMat[ 1 ][ 1 ], dp->texMat[ 1 ][ 2 ], dp->texMat[ 1 ][ 3 ],
- RAD2DEG( acos( DotProduct( dp->texMat[ 0 ], dp->texMat[ 1 ] ) ) ),
- RAD2DEG( acos( DotProduct( axis[ 0 ], axis[ 1 ] ) ) ) );
-
- Sys_Printf( "XYZ: %f %f %f ST: %f %f ST(t): %f %f\n",
- a->xyz[ 0 ], a->xyz[ 1 ], a->xyz[ 2 ],
- a->st[ 0 ], a->st[ 1 ],
- DotProduct( a->xyz, dp->texMat[ 0 ] ) + dp->texMat[ 0 ][ 3 ], DotProduct( a->xyz, dp->texMat[ 1 ] ) + dp->texMat[ 1 ][ 3 ] );
- #endif
-
- /* test texture matrix */
- s = DotProduct( a->xyz, dp->texMat[ 0 ] ) + dp->texMat[ 0 ][ 3 ];
- t = DotProduct( a->xyz, dp->texMat[ 1 ] ) + dp->texMat[ 1 ][ 3 ];
- if( fabs( s - a->st[ 0 ] ) > 0.01 || fabs( t - a->st[ 1 ] ) > 0.01 )
- {
- Sys_Printf( "Bad texture matrix! (A) (%f, %f) != (%f, %f)\n",
- s, t, a->st[ 0 ], a->st[ 1 ] );
- //% return qfalse;
- }
- s = DotProduct( b->xyz, dp->texMat[ 0 ] ) + dp->texMat[ 0 ][ 3 ];
- t = DotProduct( b->xyz, dp->texMat[ 1 ] ) + dp->texMat[ 1 ][ 3 ];
- if( fabs( s - b->st[ 0 ] ) > 0.01 || fabs( t - b->st[ 1 ] ) > 0.01 )
- {
- Sys_Printf( "Bad texture matrix! (B) (%f, %f) != (%f, %f)\n",
- s, t, b->st[ 0 ], b->st[ 1 ] );
- //% return qfalse;
- }
- s = DotProduct( c->xyz, dp->texMat[ 0 ] ) + dp->texMat[ 0 ][ 3 ];
- t = DotProduct( c->xyz, dp->texMat[ 1 ] ) + dp->texMat[ 1 ][ 3 ];
- if( fabs( s - c->st[ 0 ] ) > 0.01 || fabs( t - c->st[ 1 ] ) > 0.01 )
- {
- Sys_Printf( "Bad texture matrix! (C) (%f, %f) != (%f, %f)\n",
- s, t, c->st[ 0 ], c->st[ 1 ] );
- //% return qfalse;
- }
-
- /* disco */
- return qtrue;
-}
-
-
-
-/*
-TransformDecalProjector()
-transforms a decal projector
-note: non-normalized axes will screw up the plane transform
-*/
-
-static void TransformDecalProjector( decalProjector_t *in, vec3_t axis[ 3 ], vec3_t origin, decalProjector_t *out )
-{
- int i;
-
-
- /* copy misc stuff */
- out->si = in->si;
- out->numPlanes = in->numPlanes;
-
- /* translate bounding box and sphere (note: rotated projector bounding box will be invalid!) */
- VectorSubtract( in->mins, origin, out->mins );
- VectorSubtract( in->maxs, origin, out->maxs );
- VectorSubtract( in->center, origin, out->center );
- out->radius = in->radius;
- out->radius2 = in->radius2;
-
- /* translate planes */
- for( i = 0; i < in->numPlanes; i++ )
- {
- out->planes[ i ][ 0 ] = DotProduct( in->planes[ i ], axis[ 0 ] );
- out->planes[ i ][ 1 ] = DotProduct( in->planes[ i ], axis[ 1 ] );
- out->planes[ i ][ 2 ] = DotProduct( in->planes[ i ], axis[ 2 ] );
- out->planes[ i ][ 3 ] = in->planes[ i ][ 3 ] - DotProduct( out->planes[ i ], origin );
- }
-
- /* translate texture matrix */
- for( i = 0; i < 2; i++ )
- {
- out->texMat[ i ][ 0 ] = DotProduct( in->texMat[ i ], axis[ 0 ] );
- out->texMat[ i ][ 1 ] = DotProduct( in->texMat[ i ], axis[ 1 ] );
- out->texMat[ i ][ 2 ] = DotProduct( in->texMat[ i ], axis[ 2 ] );
- out->texMat[ i ][ 3 ] = in->texMat[ i ][ 3 ] + DotProduct( out->texMat[ i ], origin );
- }
-}
-
-
-
-/*
-MakeDecalProjector()
-creates a new decal projector from a triangle
-*/
-
-static int MakeDecalProjector( shaderInfo_t *si, vec4_t projection, float distance, int numVerts, bspDrawVert_t **dv )
-{
- int i, j;
- decalProjector_t *dp;
- vec3_t xyz;
-
-
- /* dummy check */
- if( numVerts != 3 && numVerts != 4 )
- return -1;
-
- /* limit check */
- if( numProjectors >= MAX_PROJECTORS )
- {
- Sys_Printf( "WARNING: MAX_PROJECTORS (%d) exceeded, no more decal projectors available.\n", MAX_PROJECTORS );
- return -2;
- }
-
- /* create a new projector */
- dp = &projectors[ numProjectors ];
- memset( dp, 0, sizeof( *dp ) );
-
- /* basic setup */
- dp->si = si;
- dp->numPlanes = numVerts + 2;
-
- /* make texture matrix */
- if( !MakeTextureMatrix( dp, projection, dv[ 0 ], dv[ 1 ], dv[ 2 ] ) )
- return -1;
-
- /* bound the projector */
- ClearBounds( dp->mins, dp->maxs );
- for( i = 0; i < numVerts; i++ )
- {
- AddPointToBounds( dv[ i ]->xyz, dp->mins, dp->maxs );
- VectorMA( dv[ i ]->xyz, distance, projection, xyz );
- AddPointToBounds( xyz, dp->mins, dp->maxs );
- }
-
- /* make bouding sphere */
- VectorAdd( dp->mins, dp->maxs, dp->center );
- VectorScale( dp->center, 0.5f, dp->center );
- VectorSubtract( dp->maxs, dp->center, xyz );
- dp->radius = VectorLength( xyz );
- dp->radius2 = dp->radius * dp->radius;
-
- /* make the front plane */
- if( !PlaneFromPoints( dp->planes[ 0 ], dv[ 0 ]->xyz, dv[ 1 ]->xyz, dv[ 2 ]->xyz ) )
- return -1;
-
- /* make the back plane */
- VectorSubtract( vec3_origin, dp->planes[ 0 ], dp->planes[ 1 ] );
- VectorMA( dv[ 0 ]->xyz, distance, projection, xyz );
- dp->planes[ 1 ][ 3 ] = DotProduct( xyz, dp->planes[ 1 ] );
-
- /* make the side planes */
- for( i = 0; i < numVerts; i++ )
- {
- j = (i + 1) % numVerts;
- VectorMA( dv[ i ]->xyz, distance, projection, xyz );
- if( !PlaneFromPoints( dp->planes[ i + 2 ], dv[ j ]->xyz, dv[ i ]->xyz, xyz ) )
- return -1;
- }
-
- /* return ok */
- numProjectors++;
- return numProjectors - 1;
-}
-
-
-
-/*
-ProcessDecals()
-finds all decal entities and creates decal projectors
-*/
-
-#define PLANAR_EPSILON 0.5f
-
-void ProcessDecals( void )
-{
- int i, j, x, y, pw[ 5 ], r, iterations;
- float distance;
- vec4_t projection, plane;
- vec3_t origin, target, delta;
- entity_t *e, *e2;
- parseMesh_t *p;
- mesh_t *mesh, *subdivided;
- bspDrawVert_t *dv[ 4 ];
- const char *value;
-
-
- /* note it */
- Sys_FPrintf( SYS_VRB, "--- ProcessDecals ---\n" );
-
- /* walk entity list */
- for( i = 0; i < numEntities; i++ )
- {
- /* get entity */
- e = &entities[ i ];
- value = ValueForKey( e, "classname" );
- if( Q_stricmp( value, "_decal" ) )
- continue;
-
- /* any patches? */
- if( e->patches == NULL )
- {
- Sys_Printf( "WARNING: Decal entity without any patch meshes, ignoring.\n" );
- e->epairs = NULL; /* fixme: leak! */
- continue;
- }
-
- /* find target */
- value = ValueForKey( e, "target" );
- e2 = FindTargetEntity( value );
-
- /* no target? */
- if( e2 == NULL )
- {
- Sys_Printf( "WARNING: Decal entity without a valid target, ignoring.\n" );
- continue;
- }
-
- /* walk entity patches */
- for( p = e->patches; p != NULL; p = e->patches )
- {
- /* setup projector */
- if( VectorCompare( e->origin, vec3_origin ) )
- {
- VectorAdd( p->eMins, p->eMaxs, origin );
- VectorScale( origin, 0.5f, origin );
- }
- else
- VectorCopy( e->origin, origin );
-
- VectorCopy( e2->origin, target );
- VectorSubtract( target, origin, delta );
-
- /* setup projection plane */
- distance = VectorNormalize( delta, projection );
- projection[ 3 ] = DotProduct( origin, projection );
-
- /* create projectors */
- if( distance > 0.125f )
- {
- /* tesselate the patch */
- iterations = IterationsForCurve( p->longestCurve, patchSubdivisions );
- subdivided = SubdivideMesh2( p->mesh, iterations );
-
- /* fit it to the curve and remove colinear verts on rows/columns */
- PutMeshOnCurve( *subdivided );
- mesh = RemoveLinearMeshColumnsRows( subdivided );
- FreeMesh( subdivided );
-
- /* offset by projector origin */
- for( j = 0; j < (mesh->width * mesh->height); j++ )
- VectorAdd( mesh->verts[ j ].xyz, e->origin, mesh->verts[ j ].xyz );
-
- /* iterate through the mesh quads */
- for( y = 0; y < (mesh->height - 1); y++ )
- {
- for( x = 0; x < (mesh->width - 1); x++ )
- {
- /* set indexes */
- pw[ 0 ] = x + (y * mesh->width);
- pw[ 1 ] = x + ((y + 1) * mesh->width);
- pw[ 2 ] = x + 1 + ((y + 1) * mesh->width);
- pw[ 3 ] = x + 1 + (y * mesh->width);
- pw[ 4 ] = x + (y * mesh->width); /* same as pw[ 0 ] */
-
- /* set radix */
- r = (x + y) & 1;
-
- /* get drawverts */
- dv[ 0 ] = &mesh->verts[ pw[ r + 0 ] ];
- dv[ 1 ] = &mesh->verts[ pw[ r + 1 ] ];
- dv[ 2 ] = &mesh->verts[ pw[ r + 2 ] ];
- dv[ 3 ] = &mesh->verts[ pw[ r + 3 ] ];
-
- /* planar? (nuking this optimization as it doesn't work on non-rectangular quads) */
- plane[ 0 ] = 0.0f; /* stupid msvc */
- if( 0 && PlaneFromPoints( plane, dv[ 0 ]->xyz, dv[ 1 ]->xyz, dv[ 2 ]->xyz ) &&
- fabs( DotProduct( dv[ 1 ]->xyz, plane ) - plane[ 3 ] ) <= PLANAR_EPSILON )
- {
- /* make a quad projector */
- MakeDecalProjector( p->shaderInfo, projection, distance, 4, dv );
- }
- else
- {
- /* make first triangle */
- MakeDecalProjector( p->shaderInfo, projection, distance, 3, dv );
-
- /* make second triangle */
- dv[ 1 ] = dv[ 2 ];
- dv[ 2 ] = dv[ 3 ];
- MakeDecalProjector( p->shaderInfo, projection, distance, 3, dv );
- }
- }
- }
-
- /* clean up */
- free( mesh );
- }
-
- /* remove patch from entity (fixme: leak!) */
- e->patches = p->next;
-
- /* push patch to worldspawn (enable this to debug projectors) */
- #if 0
- p->next = entities[ 0 ].patches;
- entities[ 0 ].patches = p;
- #endif
- }
- }
-
- /* emit some stats */
- Sys_FPrintf( SYS_VRB, "%9d decal projectors\n", numProjectors );
-}
-
-
-
-/*
-ProjectDecalOntoWinding()
-projects a decal onto a winding
-*/
-
-static void ProjectDecalOntoWinding( decalProjector_t *dp, mapDrawSurface_t *ds, winding_t *w )
-{
- int i, j;
- float d, d2, alpha;
- winding_t *front, *back;
- mapDrawSurface_t *ds2;
- bspDrawVert_t *dv;
- vec4_t plane;
-
-
- /* dummy check */
- if( w->numpoints < 3 )
- {
- FreeWinding( w );
- return;
- }
-
- /* offset by entity origin */
- for( i = 0; i < w->numpoints; i++ )
- VectorAdd( w->p[ i ], entityOrigin, w->p[ i ] );
-
- /* make a plane from the winding */
- if( !PlaneFromPoints( plane, w->p[ 0 ], w->p[ 1 ], w->p[ 2 ] ) )
- {
- FreeWinding( w );
- return;
- }
-
- /* backface check */
- d = DotProduct( dp->planes[ 0 ], plane );
- if( d < -0.0001f )
- {
- FreeWinding( w );
- return;
- }
-
- /* walk list of planes */
- for( i = 0; i < dp->numPlanes; i++ )
- {
- /* chop winding by the plane */
- ClipWindingEpsilon( w, dp->planes[ i ], dp->planes[ i ][ 3 ], 0.0625f, &front, &back );
- FreeWinding( w );
-
- /* lose the front fragment */
- if( front != NULL )
- FreeWinding( front );
-
- /* if nothing left in back, then bail */
- if( back == NULL )
- return;
-
- /* reset winding */
- w = back;
- }
-
- /* nothing left? */
- if( w == NULL || w->numpoints < 3 )
- return;
-
- /* add to counts */
- numDecalSurfaces++;
-
- /* make a new surface */
- ds2 = AllocDrawSurface( SURFACE_DECAL );
-
- /* set it up */
- ds2->entityNum = ds->entityNum;
- ds2->castShadows = ds->castShadows;
- ds2->recvShadows = ds->recvShadows;
- ds2->shaderInfo = dp->si;
- ds2->fogNum = ds->fogNum; /* why was this -1? */
- ds2->lightmapScale = ds->lightmapScale;
- ds2->shadeAngleDegrees = ds->shadeAngleDegrees;
- ds2->numVerts = w->numpoints;
- ds2->verts = safe_malloc( ds2->numVerts * sizeof( *ds2->verts ) );
- memset( ds2->verts, 0, ds2->numVerts * sizeof( *ds2->verts ) );
-
- /* set vertexes */
- for( i = 0; i < ds2->numVerts; i++ )
- {
- /* get vertex */
- dv = &ds2->verts[ i ];
-
- /* set alpha */
- d = DotProduct( w->p[ i ], dp->planes[ 0 ] ) - dp->planes[ 0 ][ 3 ];
- d2 = DotProduct( w->p[ i ], dp->planes[ 1 ] ) - dp->planes[ 1 ][ 3 ];
- alpha = 255.0f * d2 / (d + d2);
- if( alpha > 255 )
- alpha = 255;
- else if( alpha < 0 )
- alpha = 0;
-
- /* set misc */
- VectorSubtract( w->p[ i ], entityOrigin, dv->xyz );
- VectorCopy( plane, dv->normal );
- dv->st[ 0 ] = DotProduct( dv->xyz, dp->texMat[ 0 ] ) + dp->texMat[ 0 ][ 3 ];
- dv->st[ 1 ] = DotProduct( dv->xyz, dp->texMat[ 1 ] ) + dp->texMat[ 1 ][ 3 ];
-
- /* set color */
- for( j = 0; j < MAX_LIGHTMAPS; j++ )
- {
- dv->color[ j ][ 0 ] = 255;
- dv->color[ j ][ 1 ] = 255;
- dv->color[ j ][ 2 ] = 255;
- dv->color[ j ][ 3 ] = alpha;
- }
- }
-}
-
-
-
-/*
-ProjectDecalOntoFace()
-projects a decal onto a brushface surface
-*/
-
-static void ProjectDecalOntoFace( decalProjector_t *dp, mapDrawSurface_t *ds )
-{
- vec4_t plane;
- float d;
- winding_t *w;
-
-
- /* dummy check */
- if( ds->sideRef == NULL || ds->sideRef->side == NULL )
- return;
-
- /* backface check */
- if( ds->planar )
- {
- VectorCopy( mapplanes[ ds->planeNum ].normal, plane );
- plane[ 3 ] = mapplanes[ ds->planeNum ].dist + DotProduct( plane, entityOrigin );
- d = DotProduct( dp->planes[ 0 ], plane );
- if( d < -0.0001f )
- return;
- }
-
- /* generate decal */
- w = WindingFromDrawSurf( ds );
- ProjectDecalOntoWinding( dp, ds, w );
-}
-
-
-
-/*
-ProjectDecalOntoPatch()
-projects a decal onto a patch surface
-*/
-
-static void ProjectDecalOntoPatch( decalProjector_t *dp, mapDrawSurface_t *ds )
-{
- int x, y, pw[ 5 ], r, iterations;
- vec4_t plane;
- float d;
- mesh_t src, *mesh, *subdivided;
- winding_t *w;
-
-
- /* backface check */
- if( ds->planar )
- {
- VectorCopy( mapplanes[ ds->planeNum ].normal, plane );
- plane[ 3 ] = mapplanes[ ds->planeNum ].dist + DotProduct( plane, entityOrigin );
- d = DotProduct( dp->planes[ 0 ], plane );
- if( d < -0.0001f )
- return;
- }
-
- /* tesselate the patch */
- src.width = ds->patchWidth;
- src.height = ds->patchHeight;
- src.verts = ds->verts;
- iterations = IterationsForCurve( ds->longestCurve, patchSubdivisions );
- subdivided = SubdivideMesh2( src, iterations );
-
- /* fit it to the curve and remove colinear verts on rows/columns */
- PutMeshOnCurve( *subdivided );
- mesh = RemoveLinearMeshColumnsRows( subdivided );
- FreeMesh( subdivided );
-
- /* iterate through the mesh quads */
- for( y = 0; y < (mesh->height - 1); y++ )
- {
- for( x = 0; x < (mesh->width - 1); x++ )
- {
- /* set indexes */
- pw[ 0 ] = x + (y * mesh->width);
- pw[ 1 ] = x + ((y + 1) * mesh->width);
- pw[ 2 ] = x + 1 + ((y + 1) * mesh->width);
- pw[ 3 ] = x + 1 + (y * mesh->width);
- pw[ 4 ] = x + (y * mesh->width); /* same as pw[ 0 ] */
-
- /* set radix */
- r = (x + y) & 1;
-
- /* generate decal for first triangle */
- w = AllocWinding( 3 );
- w->numpoints = 3;
- VectorCopy( mesh->verts[ pw[ r + 0 ] ].xyz, w->p[ 0 ] );
- VectorCopy( mesh->verts[ pw[ r + 1 ] ].xyz, w->p[ 1 ] );
- VectorCopy( mesh->verts[ pw[ r + 2 ] ].xyz, w->p[ 2 ] );
- ProjectDecalOntoWinding( dp, ds, w );
-
- /* generate decal for second triangle */
- w = AllocWinding( 3 );
- w->numpoints = 3;
- VectorCopy( mesh->verts[ pw[ r + 0 ] ].xyz, w->p[ 0 ] );
- VectorCopy( mesh->verts[ pw[ r + 2 ] ].xyz, w->p[ 1 ] );
- VectorCopy( mesh->verts[ pw[ r + 3 ] ].xyz, w->p[ 2 ] );
- ProjectDecalOntoWinding( dp, ds, w );
- }
- }
-
- /* clean up */
- free( mesh );
-}
-
-
-
-/*
-ProjectDecalOntoTriangles()
-projects a decal onto a triangle surface
-*/
-
-static void ProjectDecalOntoTriangles( decalProjector_t *dp, mapDrawSurface_t *ds )
-{
- int i;
- vec4_t plane;
- float d;
- winding_t *w;
-
-
- /* triangle surfaces without shaders don't get marks by default */
- if( ds->type == SURFACE_TRIANGLES && ds->shaderInfo->shaderText == NULL )
- return;
-
- /* backface check */
- if( ds->planar )
- {
- VectorCopy( mapplanes[ ds->planeNum ].normal, plane );
- plane[ 3 ] = mapplanes[ ds->planeNum ].dist + DotProduct( plane, entityOrigin );
- d = DotProduct( dp->planes[ 0 ], plane );
- if( d < -0.0001f )
- return;
- }
-
- /* iterate through triangles */
- for( i = 0; i < ds->numIndexes; i += 3 )
- {
- /* generate decal */
- w = AllocWinding( 3 );
- w->numpoints = 3;
- VectorCopy( ds->verts[ ds->indexes[ i ] ].xyz, w->p[ 0 ] );
- VectorCopy( ds->verts[ ds->indexes[ i + 1 ] ].xyz, w->p[ 1 ] );
- VectorCopy( ds->verts[ ds->indexes[ i + 2 ] ].xyz, w->p[ 2 ] );
- ProjectDecalOntoWinding( dp, ds, w );
- }
-}
-
-
-
-/*
-MakeEntityDecals()
-projects decals onto world surfaces
-*/
-
-void MakeEntityDecals( entity_t *e )
-{
- int i, j, k, f, fOld, start;
- decalProjector_t dp;
- mapDrawSurface_t *ds;
- vec3_t identityAxis[ 3 ] = { { 1, 0, 0 }, { 0, 1, 0 }, { 0, 0, 1 } };
-
-
- /* note it */
- Sys_FPrintf( SYS_VRB, "--- MakeEntityDecals ---\n" );
-
- /* set entity origin */
- VectorCopy( e->origin, entityOrigin );
-
- /* transform projector instead of geometry */
- VectorClear( entityOrigin );
-
- /* init pacifier */
- fOld = -1;
- start = I_FloatTime();
-
- /* walk the list of decal projectors */
- for( i = 0; i < numProjectors; i++ )
- {
- /* print pacifier */
- f = 10 * i / numProjectors;
- if( f != fOld )
- {
- fOld = f;
- Sys_FPrintf( SYS_VRB, "%d...", f );
- }
-
- /* get projector */
- TransformDecalProjector( &projectors[ i ], identityAxis, e->origin, &dp );
-
- /* walk the list of surfaces in the entity */
- for( j = e->firstDrawSurf; j < numMapDrawSurfs; j++ )
- {
- /* get surface */
- ds = &mapDrawSurfs[ j ];
- if( ds->numVerts <= 0 )
- continue;
-
- /* ignore autosprite or nomarks */
- if( ds->shaderInfo->autosprite || (ds->shaderInfo->compileFlags & C_NOMARKS) )
- continue;
-
- /* bounds check */
- for( k = 0; k < 3; k++ )
- if( ds->mins[ k ] >= (dp.center[ k ] + dp.radius) ||
- ds->maxs[ k ] <= (dp.center[ k ] - dp.radius) )
- break;
- if( k < 3 )
- continue;
-
- /* switch on type */
- switch( ds->type )
- {
- case SURFACE_FACE:
- ProjectDecalOntoFace( &dp, ds );
- break;
-
- case SURFACE_PATCH:
- ProjectDecalOntoPatch( &dp, ds );
- break;
-
- case SURFACE_TRIANGLES:
- case SURFACE_FORCED_META:
- case SURFACE_META:
- ProjectDecalOntoTriangles( &dp, ds );
- break;
-
- default:
- break;
- }
- }
- }
-
- /* print time */
- Sys_FPrintf( SYS_VRB, " (%d)\n", (int) (I_FloatTime() - start) );
-
- /* emit some stats */
- Sys_FPrintf( SYS_VRB, "%9d decal surfaces\n", numDecalSurfaces );
-}
projects / voretournament / voretournament.git / blobdiff