mirror of
https://github.com/id-Software/GtkRadiant.git
synced 2026-03-20 08:59:32 +01:00
The GtkRadiant sources as originally released under the GPL license.
This commit is contained in:
Travis Bradshaw
905
tools/quake3/q3map2/decals.c
Normal file
905
tools/quake3/q3map2/decals.c
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@@ -0,0 +1,905 @@
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/* -------------------------------------------------------------------------------
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Copyright (C) 1999-2006 Id Software, Inc. and contributors.
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For a list of contributors, see the accompanying CONTRIBUTORS file.
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This file is part of GtkRadiant.
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GtkRadiant is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
|
||||
(at your option) any later version.
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||||
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GtkRadiant is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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||||
GNU General Public License for more details.
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||||
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You should have received a copy of the GNU General Public License
|
||||
along with GtkRadiant; 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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This code has been altered significantly from its original form, to support
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several games based on the Quake III Arena engine, in the form of "Q3Map2."
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------------------------------------------------------------------------------- */
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/* marker */
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#define DECALS_C
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/* dependencies */
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#include "q3map2.h"
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#define MAX_PROJECTORS 1024
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typedef struct decalProjector_s
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{
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shaderInfo_t *si;
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vec3_t mins, maxs;
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vec3_t center;
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float radius, radius2;
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int numPlanes; /* either 5 or 6, for quad or triangle projectors */
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vec4_t planes[ 6 ];
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vec4_t texMat[ 2 ];
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}
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decalProjector_t;
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static int numProjectors = 0;
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static decalProjector_t projectors[ MAX_PROJECTORS ];
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static int numDecalSurfaces = 0;
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static vec3_t entityOrigin;
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/*
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DVectorNormalize()
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normalizes a vector, returns the length, operates using doubles
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*/
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typedef double dvec_t;
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typedef dvec_t dvec3_t[ 3 ];
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dvec_t DVectorNormalize( dvec3_t in, dvec3_t out )
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{
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dvec_t len, ilen;
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len = (dvec_t) sqrt( in[ 0 ] * in[ 0 ] + in[ 1 ] * in[ 1 ] + in[ 2 ] * in[ 2 ] );
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if( len == 0.0 )
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{
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VectorClear( out );
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return 0.0;
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}
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ilen = 1.0 / len;
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out[ 0 ] = in[ 0 ] * ilen;
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out[ 1 ] = in[ 1 ] * ilen;
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out[ 2 ] = in[ 2 ] * ilen;
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return len;
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}
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/*
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MakeTextureMatrix()
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generates a texture projection matrix for a triangle
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returns qfalse if a texture matrix cannot be created
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*/
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#define Vector2Subtract(a,b,c) ((c)[ 0 ] = (a)[ 0 ] - (b)[ 0 ], (c)[ 1 ] = (a)[ 1 ] - (b)[ 1 ])
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static qboolean MakeTextureMatrix( decalProjector_t *dp, vec4_t projection, bspDrawVert_t *a, bspDrawVert_t *b, bspDrawVert_t *c )
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{
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int i, j;
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double bb, s, t, d;
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dvec3_t pa, pb, pc;
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dvec3_t bary, xyz;
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dvec3_t vecs[ 3 ], axis[ 3 ], lengths;
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/* project triangle onto plane of projection */
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d = DotProduct( a->xyz, projection ) - projection[ 3 ];
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VectorMA( a->xyz, -d, projection, pa );
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d = DotProduct( b->xyz, projection ) - projection[ 3 ];
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VectorMA( b->xyz, -d, projection, pb );
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d = DotProduct( c->xyz, projection ) - projection[ 3 ];
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VectorMA( c->xyz, -d, projection, pc );
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/* two methods */
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#if 1
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{
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/* old code */
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/* calculate barycentric basis for the triangle */
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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 ]);
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if( fabs( bb ) < 0.00000001 )
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return qfalse;
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/* calculate texture origin */
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#if 0
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s = 0.0;
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t = 0.0;
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bary[ 0 ] = ((b->st[ 0 ] - s) * (c->st[ 1 ] - t) - (c->st[ 0 ] - s) * (b->st[ 1 ] - t)) / bb;
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bary[ 1 ] = ((c->st[ 0 ] - s) * (a->st[ 1 ] - t) - (a->st[ 0 ] - s) * (c->st[ 1 ] - t)) / bb;
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bary[ 2 ] = ((a->st[ 0 ] - s) * (b->st[ 1 ] - t) - (b->st[ 0 ] - s) * (a->st[ 1 ] - t)) / bb;
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origin[ 0 ] = bary[ 0 ] * pa[ 0 ] + bary[ 1 ] * pb[ 0 ] + bary[ 2 ] * pc[ 0 ];
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origin[ 1 ] = bary[ 0 ] * pa[ 1 ] + bary[ 1 ] * pb[ 1 ] + bary[ 2 ] * pc[ 1 ];
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origin[ 2 ] = bary[ 0 ] * pa[ 2 ] + bary[ 1 ] * pb[ 2 ] + bary[ 2 ] * pc[ 2 ];
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#endif
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/* calculate s vector */
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s = a->st[ 0 ] + 1.0;
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t = a->st[ 1 ] + 0.0;
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bary[ 0 ] = ((b->st[ 0 ] - s) * (c->st[ 1 ] - t) - (c->st[ 0 ] - s) * (b->st[ 1 ] - t)) / bb;
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bary[ 1 ] = ((c->st[ 0 ] - s) * (a->st[ 1 ] - t) - (a->st[ 0 ] - s) * (c->st[ 1 ] - t)) / bb;
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bary[ 2 ] = ((a->st[ 0 ] - s) * (b->st[ 1 ] - t) - (b->st[ 0 ] - s) * (a->st[ 1 ] - t)) / bb;
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xyz[ 0 ] = bary[ 0 ] * pa[ 0 ] + bary[ 1 ] * pb[ 0 ] + bary[ 2 ] * pc[ 0 ];
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xyz[ 1 ] = bary[ 0 ] * pa[ 1 ] + bary[ 1 ] * pb[ 1 ] + bary[ 2 ] * pc[ 1 ];
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xyz[ 2 ] = bary[ 0 ] * pa[ 2 ] + bary[ 1 ] * pb[ 2 ] + bary[ 2 ] * pc[ 2 ];
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//% VectorSubtract( xyz, origin, vecs[ 0 ] );
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VectorSubtract( xyz, pa, vecs[ 0 ] );
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/* calculate t vector */
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s = a->st[ 0 ] + 0.0;
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t = a->st[ 1 ] + 1.0;
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bary[ 0 ] = ((b->st[ 0 ] - s) * (c->st[ 1 ] - t) - (c->st[ 0 ] - s) * (b->st[ 1 ] - t)) / bb;
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bary[ 1 ] = ((c->st[ 0 ] - s) * (a->st[ 1 ] - t) - (a->st[ 0 ] - s) * (c->st[ 1 ] - t)) / bb;
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bary[ 2 ] = ((a->st[ 0 ] - s) * (b->st[ 1 ] - t) - (b->st[ 0 ] - s) * (a->st[ 1 ] - t)) / bb;
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xyz[ 0 ] = bary[ 0 ] * pa[ 0 ] + bary[ 1 ] * pb[ 0 ] + bary[ 2 ] * pc[ 0 ];
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xyz[ 1 ] = bary[ 0 ] * pa[ 1 ] + bary[ 1 ] * pb[ 1 ] + bary[ 2 ] * pc[ 1 ];
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xyz[ 2 ] = bary[ 0 ] * pa[ 2 ] + bary[ 1 ] * pb[ 2 ] + bary[ 2 ] * pc[ 2 ];
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//% VectorSubtract( xyz, origin, vecs[ 1 ] );
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VectorSubtract( xyz, pa, vecs[ 1 ] );
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/* calcuate r vector */
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VectorScale( projection, -1.0, vecs[ 2 ] );
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/* calculate transform axis */
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for( i = 0; i < 3; i++ )
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lengths[ i ] = DVectorNormalize( vecs[ i ], axis[ i ] );
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for( i = 0; i < 2; i++ )
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for( j = 0; j < 3; j++ )
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dp->texMat[ i ][ j ] = lengths[ i ] > 0.0 ? (axis[ i ][ j ] / lengths[ i ]) : 0.0;
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//% dp->texMat[ i ][ j ] = fabs( vecs[ i ][ j ] ) > 0.0 ? (1.0 / vecs[ i ][ j ]) : 0.0;
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//% dp->texMat[ i ][ j ] = axis[ i ][ j ] > 0.0 ? (1.0 / axis[ i ][ j ]) : 0.0;
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/* calculalate translation component */
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dp->texMat[ 0 ][ 3 ] = a->st[ 0 ] - DotProduct( a->xyz, dp->texMat[ 0 ] );
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dp->texMat[ 1 ][ 3 ] = a->st[ 1 ] - DotProduct( a->xyz, dp->texMat[ 1 ] );
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}
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#else
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{
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int k;
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dvec3_t origin, deltas[ 3 ];
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double texDeltas[ 3 ][ 2 ];
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double delta, texDelta;
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/* new code */
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/* calculate deltas */
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VectorSubtract( pa, pb, deltas[ 0 ] );
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VectorSubtract( pa, pc, deltas[ 1 ] );
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VectorSubtract( pb, pc, deltas[ 2 ] );
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Vector2Subtract( a->st, b->st, texDeltas[ 0 ] );
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Vector2Subtract( a->st, c->st, texDeltas[ 1 ] );
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Vector2Subtract( b->st, c->st, texDeltas[ 2 ] );
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/* walk st */
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for( i = 0; i < 2; i++ )
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{
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/* walk xyz */
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for( j = 0; j < 3; j++ )
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{
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/* clear deltas */
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delta = 0.0;
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texDelta = 0.0;
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/* walk deltas */
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for( k = 0; k < 3; k++ )
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{
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if( fabs( deltas[ k ][ j ] ) > delta &&
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fabs( texDeltas[ k ][ i ] ) > texDelta )
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{
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delta = deltas[ k ][ j ];
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texDelta = texDeltas[ k ][ i ];
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}
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}
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/* set texture matrix component */
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if( fabs( delta ) > 0.0 )
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dp->texMat[ i ][ j ] = texDelta / delta;
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else
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dp->texMat[ i ][ j ] = 0.0;
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}
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/* set translation component */
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dp->texMat[ i ][ 3 ] = a->st[ i ] - DotProduct( pa, dp->texMat[ i ] );
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}
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}
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#endif
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/* debug code */
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#if 1
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Sys_Printf( "Mat: [ %f %f %f %f ] [ %f %f %f %f ] Theta: %f (%f)\n",
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dp->texMat[ 0 ][ 0 ], dp->texMat[ 0 ][ 1 ], dp->texMat[ 0 ][ 2 ], dp->texMat[ 0 ][ 3 ],
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dp->texMat[ 1 ][ 0 ], dp->texMat[ 1 ][ 1 ], dp->texMat[ 1 ][ 2 ], dp->texMat[ 1 ][ 3 ],
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RAD2DEG( acos( DotProduct( dp->texMat[ 0 ], dp->texMat[ 1 ] ) ) ),
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RAD2DEG( acos( DotProduct( axis[ 0 ], axis[ 1 ] ) ) ) );
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Sys_Printf( "XYZ: %f %f %f ST: %f %f ST(t): %f %f\n",
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a->xyz[ 0 ], a->xyz[ 1 ], a->xyz[ 2 ],
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a->st[ 0 ], a->st[ 1 ],
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DotProduct( a->xyz, dp->texMat[ 0 ] ) + dp->texMat[ 0 ][ 3 ], DotProduct( a->xyz, dp->texMat[ 1 ] ) + dp->texMat[ 1 ][ 3 ] );
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#endif
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/* test texture matrix */
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s = DotProduct( a->xyz, dp->texMat[ 0 ] ) + dp->texMat[ 0 ][ 3 ];
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t = DotProduct( a->xyz, dp->texMat[ 1 ] ) + dp->texMat[ 1 ][ 3 ];
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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 ] );
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//% return qfalse;
|
||||
}
|
||||
s = DotProduct( b->xyz, dp->texMat[ 0 ] ) + dp->texMat[ 0 ][ 3 ];
|
||||
t = DotProduct( b->xyz, dp->texMat[ 1 ] ) + dp->texMat[ 1 ][ 3 ];
|
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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 ] );
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||||
//% return qfalse;
|
||||
}
|
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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->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 );
|
||||
}
|
||||
Reference in New Issue
Block a user