diff options
Diffstat (limited to 'ioq3-r437/src/renderer/tr_shade_calc.c')
| -rw-r--r-- | ioq3-r437/src/renderer/tr_shade_calc.c | 1231 |
1 files changed, 0 insertions, 1231 deletions
diff --git a/ioq3-r437/src/renderer/tr_shade_calc.c b/ioq3-r437/src/renderer/tr_shade_calc.c deleted file mode 100644 index 15fbe77a..00000000 --- a/ioq3-r437/src/renderer/tr_shade_calc.c +++ /dev/null @@ -1,1231 +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 -=========================================================================== -*/ -// tr_shade_calc.c - -#include "tr_local.h" -#if idppc_altivec && !defined(MACOS_X) -#include <altivec.h> -#endif - - -#define WAVEVALUE( table, base, amplitude, phase, freq ) ((base) + table[ myftol( ( ( (phase) + tess.shaderTime * (freq) ) * FUNCTABLE_SIZE ) ) & FUNCTABLE_MASK ] * (amplitude)) - -static float *TableForFunc( genFunc_t func ) -{ - switch ( func ) - { - case GF_SIN: - return tr.sinTable; - case GF_TRIANGLE: - return tr.triangleTable; - case GF_SQUARE: - return tr.squareTable; - case GF_SAWTOOTH: - return tr.sawToothTable; - case GF_INVERSE_SAWTOOTH: - return tr.inverseSawToothTable; - case GF_NONE: - default: - break; - } - - ri.Error( ERR_DROP, "TableForFunc called with invalid function '%d' in shader '%s'\n", func, tess.shader->name ); - return NULL; -} - -/* -** EvalWaveForm -** -** Evaluates a given waveForm_t, referencing backEnd.refdef.time directly -*/ -static float EvalWaveForm( const waveForm_t *wf ) -{ - float *table; - - table = TableForFunc( wf->func ); - - return WAVEVALUE( table, wf->base, wf->amplitude, wf->phase, wf->frequency ); -} - -static float EvalWaveFormClamped( const waveForm_t *wf ) -{ - float glow = EvalWaveForm( wf ); - - if ( glow < 0 ) - { - return 0; - } - - if ( glow > 1 ) - { - return 1; - } - - return glow; -} - -/* -** RB_CalcStretchTexCoords -*/ -void RB_CalcStretchTexCoords( const waveForm_t *wf, float *st ) -{ - float p; - texModInfo_t tmi; - - p = 1.0f / EvalWaveForm( wf ); - - tmi.matrix[0][0] = p; - tmi.matrix[1][0] = 0; - tmi.translate[0] = 0.5f - 0.5f * p; - - tmi.matrix[0][1] = 0; - tmi.matrix[1][1] = p; - tmi.translate[1] = 0.5f - 0.5f * p; - - RB_CalcTransformTexCoords( &tmi, st ); -} - -/* -==================================================================== - -DEFORMATIONS - -==================================================================== -*/ - -/* -======================== -RB_CalcDeformVertexes - -======================== -*/ -void RB_CalcDeformVertexes( deformStage_t *ds ) -{ - int i; - vec3_t offset; - float scale; - float *xyz = ( float * ) tess.xyz; - float *normal = ( float * ) tess.normal; - float *table; - - if ( ds->deformationWave.frequency == 0 ) - { - scale = EvalWaveForm( &ds->deformationWave ); - - for ( i = 0; i < tess.numVertexes; i++, xyz += 4, normal += 4 ) - { - VectorScale( normal, scale, offset ); - - xyz[0] += offset[0]; - xyz[1] += offset[1]; - xyz[2] += offset[2]; - } - } - else - { - table = TableForFunc( ds->deformationWave.func ); - - for ( i = 0; i < tess.numVertexes; i++, xyz += 4, normal += 4 ) - { - float off = ( xyz[0] + xyz[1] + xyz[2] ) * ds->deformationSpread; - - scale = WAVEVALUE( table, ds->deformationWave.base, - ds->deformationWave.amplitude, - ds->deformationWave.phase + off, - ds->deformationWave.frequency ); - - VectorScale( normal, scale, offset ); - - xyz[0] += offset[0]; - xyz[1] += offset[1]; - xyz[2] += offset[2]; - } - } -} - -/* -========================= -RB_CalcDeformNormals - -Wiggle the normals for wavy environment mapping -========================= -*/ -void RB_CalcDeformNormals( deformStage_t *ds ) { - int i; - float scale; - float *xyz = ( float * ) tess.xyz; - float *normal = ( float * ) tess.normal; - - for ( i = 0; i < tess.numVertexes; i++, xyz += 4, normal += 4 ) { - scale = 0.98f; - scale = R_NoiseGet4f( xyz[0] * scale, xyz[1] * scale, xyz[2] * scale, - tess.shaderTime * ds->deformationWave.frequency ); - normal[ 0 ] += ds->deformationWave.amplitude * scale; - - scale = 0.98f; - scale = R_NoiseGet4f( 100 + xyz[0] * scale, xyz[1] * scale, xyz[2] * scale, - tess.shaderTime * ds->deformationWave.frequency ); - normal[ 1 ] += ds->deformationWave.amplitude * scale; - - scale = 0.98f; - scale = R_NoiseGet4f( 200 + xyz[0] * scale, xyz[1] * scale, xyz[2] * scale, - tess.shaderTime * ds->deformationWave.frequency ); - normal[ 2 ] += ds->deformationWave.amplitude * scale; - - VectorNormalizeFast( normal ); - } -} - -/* -======================== -RB_CalcBulgeVertexes - -======================== -*/ -void RB_CalcBulgeVertexes( deformStage_t *ds ) { - int i; - const float *st = ( const float * ) tess.texCoords[0]; - float *xyz = ( float * ) tess.xyz; - float *normal = ( float * ) tess.normal; - float now; - - now = backEnd.refdef.time * ds->bulgeSpeed * 0.001f; - - for ( i = 0; i < tess.numVertexes; i++, xyz += 4, st += 4, normal += 4 ) { - int off; - float scale; - - off = (float)( FUNCTABLE_SIZE / (M_PI*2) ) * ( st[0] * ds->bulgeWidth + now ); - - scale = tr.sinTable[ off & FUNCTABLE_MASK ] * ds->bulgeHeight; - - xyz[0] += normal[0] * scale; - xyz[1] += normal[1] * scale; - xyz[2] += normal[2] * scale; - } -} - - -/* -====================== -RB_CalcMoveVertexes - -A deformation that can move an entire surface along a wave path -====================== -*/ -void RB_CalcMoveVertexes( deformStage_t *ds ) { - int i; - float *xyz; - float *table; - float scale; - vec3_t offset; - - table = TableForFunc( ds->deformationWave.func ); - - scale = WAVEVALUE( table, ds->deformationWave.base, - ds->deformationWave.amplitude, - ds->deformationWave.phase, - ds->deformationWave.frequency ); - - VectorScale( ds->moveVector, scale, offset ); - - xyz = ( float * ) tess.xyz; - for ( i = 0; i < tess.numVertexes; i++, xyz += 4 ) { - VectorAdd( xyz, offset, xyz ); - } -} - - -/* -============= -DeformText - -Change a polygon into a bunch of text polygons -============= -*/ -void DeformText( const char *text ) { - int i; - vec3_t origin, width, height; - int len; - int ch; - byte color[4]; - float bottom, top; - vec3_t mid; - - height[0] = 0; - height[1] = 0; - height[2] = -1; - CrossProduct( tess.normal[0], height, width ); - - // find the midpoint of the box - VectorClear( mid ); - bottom = 999999; - top = -999999; - for ( i = 0 ; i < 4 ; i++ ) { - VectorAdd( tess.xyz[i], mid, mid ); - if ( tess.xyz[i][2] < bottom ) { - bottom = tess.xyz[i][2]; - } - if ( tess.xyz[i][2] > top ) { - top = tess.xyz[i][2]; - } - } - VectorScale( mid, 0.25f, origin ); - - // determine the individual character size - height[0] = 0; - height[1] = 0; - height[2] = ( top - bottom ) * 0.5f; - - VectorScale( width, height[2] * -0.75f, width ); - - // determine the starting position - len = strlen( text ); - VectorMA( origin, (len-1), width, origin ); - - // clear the shader indexes - tess.numIndexes = 0; - tess.numVertexes = 0; - - color[0] = color[1] = color[2] = color[3] = 255; - - // draw each character - for ( i = 0 ; i < len ; i++ ) { - ch = text[i]; - ch &= 255; - - if ( ch != ' ' ) { - int row, col; - float frow, fcol, size; - - row = ch>>4; - col = ch&15; - - frow = row*0.0625f; - fcol = col*0.0625f; - size = 0.0625f; - - RB_AddQuadStampExt( origin, width, height, color, fcol, frow, fcol + size, frow + size ); - } - VectorMA( origin, -2, width, origin ); - } -} - -/* -================== -GlobalVectorToLocal -================== -*/ -static void GlobalVectorToLocal( const vec3_t in, vec3_t out ) { - out[0] = DotProduct( in, backEnd.or.axis[0] ); - out[1] = DotProduct( in, backEnd.or.axis[1] ); - out[2] = DotProduct( in, backEnd.or.axis[2] ); -} - -/* -===================== -AutospriteDeform - -Assuming all the triangles for this shader are independant -quads, rebuild them as forward facing sprites -===================== -*/ -static void AutospriteDeform( void ) { - int i; - int oldVerts; - float *xyz; - vec3_t mid, delta; - float radius; - vec3_t left, up; - vec3_t leftDir, upDir; - - if ( tess.numVertexes & 3 ) { - ri.Printf( PRINT_WARNING, "Autosprite shader %s had odd vertex count", tess.shader->name ); - } - if ( tess.numIndexes != ( tess.numVertexes >> 2 ) * 6 ) { - ri.Printf( PRINT_WARNING, "Autosprite shader %s had odd index count", tess.shader->name ); - } - - oldVerts = tess.numVertexes; - tess.numVertexes = 0; - tess.numIndexes = 0; - - if ( backEnd.currentEntity != &tr.worldEntity ) { - GlobalVectorToLocal( backEnd.viewParms.or.axis[1], leftDir ); - GlobalVectorToLocal( backEnd.viewParms.or.axis[2], upDir ); - } else { - VectorCopy( backEnd.viewParms.or.axis[1], leftDir ); - VectorCopy( backEnd.viewParms.or.axis[2], upDir ); - } - - for ( i = 0 ; i < oldVerts ; i+=4 ) { - // find the midpoint - xyz = tess.xyz[i]; - - mid[0] = 0.25f * (xyz[0] + xyz[4] + xyz[8] + xyz[12]); - mid[1] = 0.25f * (xyz[1] + xyz[5] + xyz[9] + xyz[13]); - mid[2] = 0.25f * (xyz[2] + xyz[6] + xyz[10] + xyz[14]); - - VectorSubtract( xyz, mid, delta ); - radius = VectorLength( delta ) * 0.707f; // / sqrt(2) - - VectorScale( leftDir, radius, left ); - VectorScale( upDir, radius, up ); - - if ( backEnd.viewParms.isMirror ) { - VectorSubtract( vec3_origin, left, left ); - } - - // compensate for scale in the axes if necessary - if ( backEnd.currentEntity->e.nonNormalizedAxes ) { - float axisLength; - axisLength = VectorLength( backEnd.currentEntity->e.axis[0] ); - if ( !axisLength ) { - axisLength = 0; - } else { - axisLength = 1.0f / axisLength; - } - VectorScale(left, axisLength, left); - VectorScale(up, axisLength, up); - } - - RB_AddQuadStamp( mid, left, up, tess.vertexColors[i] ); - } -} - - -/* -===================== -Autosprite2Deform - -Autosprite2 will pivot a rectangular quad along the center of its long axis -===================== -*/ -int edgeVerts[6][2] = { - { 0, 1 }, - { 0, 2 }, - { 0, 3 }, - { 1, 2 }, - { 1, 3 }, - { 2, 3 } -}; - -static void Autosprite2Deform( void ) { - int i, j, k; - int indexes; - float *xyz; - vec3_t forward; - - if ( tess.numVertexes & 3 ) { - ri.Printf( PRINT_WARNING, "Autosprite2 shader %s had odd vertex count", tess.shader->name ); - } - if ( tess.numIndexes != ( tess.numVertexes >> 2 ) * 6 ) { - ri.Printf( PRINT_WARNING, "Autosprite2 shader %s had odd index count", tess.shader->name ); - } - - if ( backEnd.currentEntity != &tr.worldEntity ) { - GlobalVectorToLocal( backEnd.viewParms.or.axis[0], forward ); - } else { - VectorCopy( backEnd.viewParms.or.axis[0], forward ); - } - - // this is a lot of work for two triangles... - // we could precalculate a lot of it is an issue, but it would mess up - // the shader abstraction - for ( i = 0, indexes = 0 ; i < tess.numVertexes ; i+=4, indexes+=6 ) { - float lengths[2]; - int nums[2]; - vec3_t mid[2]; - vec3_t major, minor; - float *v1, *v2; - - // find the midpoint - xyz = tess.xyz[i]; - - // identify the two shortest edges - nums[0] = nums[1] = 0; - lengths[0] = lengths[1] = 999999; - - for ( j = 0 ; j < 6 ; j++ ) { - float l; - vec3_t temp; - - v1 = xyz + 4 * edgeVerts[j][0]; - v2 = xyz + 4 * edgeVerts[j][1]; - - VectorSubtract( v1, v2, temp ); - - l = DotProduct( temp, temp ); - if ( l < lengths[0] ) { - nums[1] = nums[0]; - lengths[1] = lengths[0]; - nums[0] = j; - lengths[0] = l; - } else if ( l < lengths[1] ) { - nums[1] = j; - lengths[1] = l; - } - } - - for ( j = 0 ; j < 2 ; j++ ) { - v1 = xyz + 4 * edgeVerts[nums[j]][0]; - v2 = xyz + 4 * edgeVerts[nums[j]][1]; - - mid[j][0] = 0.5f * (v1[0] + v2[0]); - mid[j][1] = 0.5f * (v1[1] + v2[1]); - mid[j][2] = 0.5f * (v1[2] + v2[2]); - } - - // find the vector of the major axis - VectorSubtract( mid[1], mid[0], major ); - - // cross this with the view direction to get minor axis - CrossProduct( major, forward, minor ); - VectorNormalize( minor ); - - // re-project the points - for ( j = 0 ; j < 2 ; j++ ) { - float l; - - v1 = xyz + 4 * edgeVerts[nums[j]][0]; - v2 = xyz + 4 * edgeVerts[nums[j]][1]; - - l = 0.5 * sqrt( lengths[j] ); - - // we need to see which direction this edge - // is used to determine direction of projection - for ( k = 0 ; k < 5 ; k++ ) { - if ( tess.indexes[ indexes + k ] == i + edgeVerts[nums[j]][0] - && tess.indexes[ indexes + k + 1 ] == i + edgeVerts[nums[j]][1] ) { - break; - } - } - - if ( k == 5 ) { - VectorMA( mid[j], l, minor, v1 ); - VectorMA( mid[j], -l, minor, v2 ); - } else { - VectorMA( mid[j], -l, minor, v1 ); - VectorMA( mid[j], l, minor, v2 ); - } - } - } -} - - -/* -===================== -RB_DeformTessGeometry - -===================== -*/ -void RB_DeformTessGeometry( void ) { - int i; - deformStage_t *ds; - - for ( i = 0 ; i < tess.shader->numDeforms ; i++ ) { - ds = &tess.shader->deforms[ i ]; - - switch ( ds->deformation ) { - case DEFORM_NONE: - break; - case DEFORM_NORMALS: - RB_CalcDeformNormals( ds ); - break; - case DEFORM_WAVE: - RB_CalcDeformVertexes( ds ); - break; - case DEFORM_BULGE: - RB_CalcBulgeVertexes( ds ); - break; - case DEFORM_MOVE: - RB_CalcMoveVertexes( ds ); - break; - case DEFORM_PROJECTION_SHADOW: - RB_ProjectionShadowDeform(); - break; - case DEFORM_AUTOSPRITE: - AutospriteDeform(); - break; - case DEFORM_AUTOSPRITE2: - Autosprite2Deform(); - break; - case DEFORM_TEXT0: - case DEFORM_TEXT1: - case DEFORM_TEXT2: - case DEFORM_TEXT3: - case DEFORM_TEXT4: - case DEFORM_TEXT5: - case DEFORM_TEXT6: - case DEFORM_TEXT7: - DeformText( backEnd.refdef.text[ds->deformation - DEFORM_TEXT0] ); - break; - } - } -} - -/* -==================================================================== - -COLORS - -==================================================================== -*/ - - -/* -** RB_CalcColorFromEntity -*/ -void RB_CalcColorFromEntity( unsigned char *dstColors ) -{ - int i; - int *pColors = ( int * ) dstColors; - int c; - - if ( !backEnd.currentEntity ) - return; - - c = * ( int * ) backEnd.currentEntity->e.shaderRGBA; - - for ( i = 0; i < tess.numVertexes; i++, pColors++ ) - { - *pColors = c; - } -} - -/* -** RB_CalcColorFromOneMinusEntity -*/ -void RB_CalcColorFromOneMinusEntity( unsigned char *dstColors ) -{ - int i; - int *pColors = ( int * ) dstColors; - unsigned char invModulate[3]; - int c; - - if ( !backEnd.currentEntity ) - return; - - invModulate[0] = 255 - backEnd.currentEntity->e.shaderRGBA[0]; - invModulate[1] = 255 - backEnd.currentEntity->e.shaderRGBA[1]; - invModulate[2] = 255 - backEnd.currentEntity->e.shaderRGBA[2]; - invModulate[3] = 255 - backEnd.currentEntity->e.shaderRGBA[3]; // this trashes alpha, but the AGEN block fixes it - - c = * ( int * ) invModulate; - - for ( i = 0; i < tess.numVertexes; i++, pColors++ ) - { - *pColors = * ( int * ) invModulate; - } -} - -/* -** RB_CalcAlphaFromEntity -*/ -void RB_CalcAlphaFromEntity( unsigned char *dstColors ) -{ - int i; - - if ( !backEnd.currentEntity ) - return; - - dstColors += 3; - - for ( i = 0; i < tess.numVertexes; i++, dstColors += 4 ) - { - *dstColors = backEnd.currentEntity->e.shaderRGBA[3]; - } -} - -/* -** RB_CalcAlphaFromOneMinusEntity -*/ -void RB_CalcAlphaFromOneMinusEntity( unsigned char *dstColors ) -{ - int i; - - if ( !backEnd.currentEntity ) - return; - - dstColors += 3; - - for ( i = 0; i < tess.numVertexes; i++, dstColors += 4 ) - { - *dstColors = 0xff - backEnd.currentEntity->e.shaderRGBA[3]; - } -} - -/* -** RB_CalcWaveColor -*/ -void RB_CalcWaveColor( const waveForm_t *wf, unsigned char *dstColors ) -{ - int i; - int v; - float glow; - int *colors = ( int * ) dstColors; - byte color[4]; - - - if ( wf->func == GF_NOISE ) { - glow = wf->base + R_NoiseGet4f( 0, 0, 0, ( tess.shaderTime + wf->phase ) * wf->frequency ) * wf->amplitude; - } else { - glow = EvalWaveForm( wf ) * tr.identityLight; - } - - if ( glow < 0 ) { - glow = 0; - } - else if ( glow > 1 ) { - glow = 1; - } - - v = myftol( 255 * glow ); - color[0] = color[1] = color[2] = v; - color[3] = 255; - v = *(int *)color; - - for ( i = 0; i < tess.numVertexes; i++, colors++ ) { - *colors = v; - } -} - -/* -** RB_CalcWaveAlpha -*/ -void RB_CalcWaveAlpha( const waveForm_t *wf, unsigned char *dstColors ) -{ - int i; - int v; - float glow; - - glow = EvalWaveFormClamped( wf ); - - v = 255 * glow; - - for ( i = 0; i < tess.numVertexes; i++, dstColors += 4 ) - { - dstColors[3] = v; - } -} - -/* -** RB_CalcModulateColorsByFog -*/ -void RB_CalcModulateColorsByFog( unsigned char *colors ) { - int i; - float texCoords[SHADER_MAX_VERTEXES][2]; - - // calculate texcoords so we can derive density - // this is not wasted, because it would only have - // been previously called if the surface was opaque - RB_CalcFogTexCoords( texCoords[0] ); - - for ( i = 0; i < tess.numVertexes; i++, colors += 4 ) { - float f = 1.0 - R_FogFactor( texCoords[i][0], texCoords[i][1] ); - colors[0] *= f; - colors[1] *= f; - colors[2] *= f; - } -} - -/* -** RB_CalcModulateAlphasByFog -*/ -void RB_CalcModulateAlphasByFog( unsigned char *colors ) { - int i; - float texCoords[SHADER_MAX_VERTEXES][2]; - - // calculate texcoords so we can derive density - // this is not wasted, because it would only have - // been previously called if the surface was opaque - RB_CalcFogTexCoords( texCoords[0] ); - - for ( i = 0; i < tess.numVertexes; i++, colors += 4 ) { - float f = 1.0 - R_FogFactor( texCoords[i][0], texCoords[i][1] ); - colors[3] *= f; - } -} - -/* -** RB_CalcModulateRGBAsByFog -*/ -void RB_CalcModulateRGBAsByFog( unsigned char *colors ) { - int i; - float texCoords[SHADER_MAX_VERTEXES][2]; - - // calculate texcoords so we can derive density - // this is not wasted, because it would only have - // been previously called if the surface was opaque - RB_CalcFogTexCoords( texCoords[0] ); - - for ( i = 0; i < tess.numVertexes; i++, colors += 4 ) { - float f = 1.0 - R_FogFactor( texCoords[i][0], texCoords[i][1] ); - colors[0] *= f; - colors[1] *= f; - colors[2] *= f; - colors[3] *= f; - } -} - - -/* -==================================================================== - -TEX COORDS - -==================================================================== -*/ - -/* -======================== -RB_CalcFogTexCoords - -To do the clipped fog plane really correctly, we should use -projected textures, but I don't trust the drivers and it -doesn't fit our shader data. -======================== -*/ -void RB_CalcFogTexCoords( float *st ) { - int i; - float *v; - float s, t; - float eyeT; - qboolean eyeOutside; - fog_t *fog; - vec3_t local; - vec4_t fogDistanceVector, fogDepthVector = {0, 0, 0, 0}; - - fog = tr.world->fogs + tess.fogNum; - - // all fogging distance is based on world Z units - VectorSubtract( backEnd.or.origin, backEnd.viewParms.or.origin, local ); - fogDistanceVector[0] = -backEnd.or.modelMatrix[2]; - fogDistanceVector[1] = -backEnd.or.modelMatrix[6]; - fogDistanceVector[2] = -backEnd.or.modelMatrix[10]; - fogDistanceVector[3] = DotProduct( local, backEnd.viewParms.or.axis[0] ); - - // scale the fog vectors based on the fog's thickness - fogDistanceVector[0] *= fog->tcScale; - fogDistanceVector[1] *= fog->tcScale; - fogDistanceVector[2] *= fog->tcScale; - fogDistanceVector[3] *= fog->tcScale; - - // rotate the gradient vector for this orientation - if ( fog->hasSurface ) { - fogDepthVector[0] = fog->surface[0] * backEnd.or.axis[0][0] + - fog->surface[1] * backEnd.or.axis[0][1] + fog->surface[2] * backEnd.or.axis[0][2]; - fogDepthVector[1] = fog->surface[0] * backEnd.or.axis[1][0] + - fog->surface[1] * backEnd.or.axis[1][1] + fog->surface[2] * backEnd.or.axis[1][2]; - fogDepthVector[2] = fog->surface[0] * backEnd.or.axis[2][0] + - fog->surface[1] * backEnd.or.axis[2][1] + fog->surface[2] * backEnd.or.axis[2][2]; - fogDepthVector[3] = -fog->surface[3] + DotProduct( backEnd.or.origin, fog->surface ); - - eyeT = DotProduct( backEnd.or.viewOrigin, fogDepthVector ) + fogDepthVector[3]; - } else { - eyeT = 1; // non-surface fog always has eye inside - } - - // see if the viewpoint is outside - // this is needed for clipping distance even for constant fog - - if ( eyeT < 0 ) { - eyeOutside = qtrue; - } else { - eyeOutside = qfalse; - } - - fogDistanceVector[3] += 1.0/512; - - // calculate density for each point - for (i = 0, v = tess.xyz[0] ; i < tess.numVertexes ; i++, v += 4) { - // calculate the length in fog - s = DotProduct( v, fogDistanceVector ) + fogDistanceVector[3]; - t = DotProduct( v, fogDepthVector ) + fogDepthVector[3]; - - // partially clipped fogs use the T axis - if ( eyeOutside ) { - if ( t < 1.0 ) { - t = 1.0/32; // point is outside, so no fogging - } else { - t = 1.0/32 + 30.0/32 * t / ( t - eyeT ); // cut the distance at the fog plane - } - } else { - if ( t < 0 ) { - t = 1.0/32; // point is outside, so no fogging - } else { - t = 31.0/32; - } - } - - st[0] = s; - st[1] = t; - st += 2; - } -} - - - -/* -** RB_CalcEnvironmentTexCoords -*/ -void RB_CalcEnvironmentTexCoords( float *st ) -{ - int i; - float *v, *normal; - vec3_t viewer, reflected; - float d; - - v = tess.xyz[0]; - normal = tess.normal[0]; - - for (i = 0 ; i < tess.numVertexes ; i++, v += 4, normal += 4, st += 2 ) - { - VectorSubtract (backEnd.or.viewOrigin, v, viewer); - VectorNormalizeFast (viewer); - - d = DotProduct (normal, viewer); - - reflected[0] = normal[0]*2*d - viewer[0]; - reflected[1] = normal[1]*2*d - viewer[1]; - reflected[2] = normal[2]*2*d - viewer[2]; - - st[0] = 0.5 + reflected[1] * 0.5; - st[1] = 0.5 - reflected[2] * 0.5; - } -} - -/* -** RB_CalcTurbulentTexCoords -*/ -void RB_CalcTurbulentTexCoords( const waveForm_t *wf, float *st ) -{ - int i; - float now; - - now = ( wf->phase + tess.shaderTime * wf->frequency ); - - for ( i = 0; i < tess.numVertexes; i++, st += 2 ) - { - float s = st[0]; - float t = st[1]; - - st[0] = s + tr.sinTable[ ( ( int ) ( ( ( tess.xyz[i][0] + tess.xyz[i][2] )* 1.0/128 * 0.125 + now ) * FUNCTABLE_SIZE ) ) & ( FUNCTABLE_MASK ) ] * wf->amplitude; - st[1] = t + tr.sinTable[ ( ( int ) ( ( tess.xyz[i][1] * 1.0/128 * 0.125 + now ) * FUNCTABLE_SIZE ) ) & ( FUNCTABLE_MASK ) ] * wf->amplitude; - } -} - -/* -** RB_CalcScaleTexCoords -*/ -void RB_CalcScaleTexCoords( const float scale[2], float *st ) -{ - int i; - - for ( i = 0; i < tess.numVertexes; i++, st += 2 ) - { - st[0] *= scale[0]; - st[1] *= scale[1]; - } -} - -/* -** RB_CalcScrollTexCoords -*/ -void RB_CalcScrollTexCoords( const float scrollSpeed[2], float *st ) -{ - int i; - float timeScale = tess.shaderTime; - float adjustedScrollS, adjustedScrollT; - - adjustedScrollS = scrollSpeed[0] * timeScale; - adjustedScrollT = scrollSpeed[1] * timeScale; - - // clamp so coordinates don't continuously get larger, causing problems - // with hardware limits - adjustedScrollS = adjustedScrollS - floor( adjustedScrollS ); - adjustedScrollT = adjustedScrollT - floor( adjustedScrollT ); - - for ( i = 0; i < tess.numVertexes; i++, st += 2 ) - { - st[0] += adjustedScrollS; - st[1] += adjustedScrollT; - } -} - -/* -** RB_CalcTransformTexCoords -*/ -void RB_CalcTransformTexCoords( const texModInfo_t *tmi, float *st ) -{ - int i; - - for ( i = 0; i < tess.numVertexes; i++, st += 2 ) - { - float s = st[0]; - float t = st[1]; - - st[0] = s * tmi->matrix[0][0] + t * tmi->matrix[1][0] + tmi->translate[0]; - st[1] = s * tmi->matrix[0][1] + t * tmi->matrix[1][1] + tmi->translate[1]; - } -} - -/* -** RB_CalcRotateTexCoords -*/ -void RB_CalcRotateTexCoords( float degsPerSecond, float *st ) -{ - float timeScale = tess.shaderTime; - float degs; - int index; - float sinValue, cosValue; - texModInfo_t tmi; - - degs = -degsPerSecond * timeScale; - index = degs * ( FUNCTABLE_SIZE / 360.0f ); - - sinValue = tr.sinTable[ index & FUNCTABLE_MASK ]; - cosValue = tr.sinTable[ ( index + FUNCTABLE_SIZE / 4 ) & FUNCTABLE_MASK ]; - - tmi.matrix[0][0] = cosValue; - tmi.matrix[1][0] = -sinValue; - tmi.translate[0] = 0.5 - 0.5 * cosValue + 0.5 * sinValue; - - tmi.matrix[0][1] = sinValue; - tmi.matrix[1][1] = cosValue; - tmi.translate[1] = 0.5 - 0.5 * sinValue - 0.5 * cosValue; - - RB_CalcTransformTexCoords( &tmi, st ); -} - - - - - - -#if id386 && !defined(__GNUC__) - -long myftol( float f ) { - static int tmp; - __asm fld f - __asm fistp tmp - __asm mov eax, tmp -} - -#endif - -/* -** RB_CalcSpecularAlpha -** -** Calculates specular coefficient and places it in the alpha channel -*/ -vec3_t lightOrigin = { -960, 1980, 96 }; // FIXME: track dynamically - -void RB_CalcSpecularAlpha( unsigned char *alphas ) { - int i; - float *v, *normal; - vec3_t viewer, reflected; - float l, d; - int b; - vec3_t lightDir; - int numVertexes; - - v = tess.xyz[0]; - normal = tess.normal[0]; - - alphas += 3; - - numVertexes = tess.numVertexes; - for (i = 0 ; i < numVertexes ; i++, v += 4, normal += 4, alphas += 4) { - float ilength; - - VectorSubtract( lightOrigin, v, lightDir ); -// ilength = Q_rsqrt( DotProduct( lightDir, lightDir ) ); - VectorNormalizeFast( lightDir ); - - // calculate the specular color - d = DotProduct (normal, lightDir); -// d *= ilength; - - // we don't optimize for the d < 0 case since this tends to - // cause visual artifacts such as faceted "snapping" - reflected[0] = normal[0]*2*d - lightDir[0]; - reflected[1] = normal[1]*2*d - lightDir[1]; - reflected[2] = normal[2]*2*d - lightDir[2]; - - VectorSubtract (backEnd.or.viewOrigin, v, viewer); - ilength = Q_rsqrt( DotProduct( viewer, viewer ) ); - l = DotProduct (reflected, viewer); - l *= ilength; - - if (l < 0) { - b = 0; - } else { - l = l*l; - l = l*l; - b = l * 255; - if (b > 255) { - b = 255; - } - } - - *alphas = b; - } -} - -/* -** RB_CalcDiffuseColor -** -** The basic vertex lighting calc -*/ -#if idppc_altivec -static void RB_CalcDiffuseColor_altivec( unsigned char *colors ) -{ - int i; - float *v, *normal; - trRefEntity_t *ent; - int ambientLightInt; - vec3_t lightDir; - int numVertexes; - vector unsigned char vSel = VECCONST_UINT8(0x00, 0x00, 0x00, 0xff, - 0x00, 0x00, 0x00, 0xff, - 0x00, 0x00, 0x00, 0xff, - 0x00, 0x00, 0x00, 0xff); - vector float ambientLightVec; - vector float directedLightVec; - vector float lightDirVec; - vector float normalVec0, normalVec1; - vector float incomingVec0, incomingVec1, incomingVec2; - vector float zero, jVec; - vector signed int jVecInt; - vector signed short jVecShort; - vector unsigned char jVecChar, normalPerm; - ent = backEnd.currentEntity; - ambientLightInt = ent->ambientLightInt; - // A lot of this could be simplified if we made sure - // entities light info was 16-byte aligned. - jVecChar = vec_lvsl(0, ent->ambientLight); - ambientLightVec = vec_ld(0, (vector float *)ent->ambientLight); - jVec = vec_ld(11, (vector float *)ent->ambientLight); - ambientLightVec = vec_perm(ambientLightVec,jVec,jVecChar); - - jVecChar = vec_lvsl(0, ent->directedLight); - directedLightVec = vec_ld(0,(vector float *)ent->directedLight); - jVec = vec_ld(11,(vector float *)ent->directedLight); - directedLightVec = vec_perm(directedLightVec,jVec,jVecChar); - - jVecChar = vec_lvsl(0, ent->lightDir); - lightDirVec = vec_ld(0,(vector float *)ent->lightDir); - jVec = vec_ld(11,(vector float *)ent->lightDir); - lightDirVec = vec_perm(lightDirVec,jVec,jVecChar); - - zero = (vector float)vec_splat_s8(0); - VectorCopy( ent->lightDir, lightDir ); - - v = tess.xyz[0]; - normal = tess.normal[0]; - - normalPerm = vec_lvsl(0,normal); - numVertexes = tess.numVertexes; - for (i = 0 ; i < numVertexes ; i++, v += 4, normal += 4) { - normalVec0 = vec_ld(0,(vector float *)normal); - normalVec1 = vec_ld(11,(vector float *)normal); - normalVec0 = vec_perm(normalVec0,normalVec1,normalPerm); - incomingVec0 = vec_madd(normalVec0, lightDirVec, zero); - incomingVec1 = vec_sld(incomingVec0,incomingVec0,4); - incomingVec2 = vec_add(incomingVec0,incomingVec1); - incomingVec1 = vec_sld(incomingVec1,incomingVec1,4); - incomingVec2 = vec_add(incomingVec2,incomingVec1); - incomingVec0 = vec_splat(incomingVec2,0); - incomingVec0 = vec_max(incomingVec0,zero); - normalPerm = vec_lvsl(12,normal); - jVec = vec_madd(incomingVec0, directedLightVec, ambientLightVec); - jVecInt = vec_cts(jVec,0); // RGBx - jVecShort = vec_pack(jVecInt,jVecInt); // RGBxRGBx - jVecChar = vec_packsu(jVecShort,jVecShort); // RGBxRGBxRGBxRGBx - jVecChar = vec_sel(jVecChar,vSel,vSel); // RGBARGBARGBARGBA replace alpha with 255 - vec_ste((vector unsigned int)jVecChar,0,(unsigned int *)&colors[i*4]); // store color - } -} -#endif - -static void RB_CalcDiffuseColor_scalar( unsigned char *colors ) -{ - int i, j; - float *v, *normal; - float incoming; - trRefEntity_t *ent; - int ambientLightInt; - vec3_t ambientLight; - vec3_t lightDir; - vec3_t directedLight; - int numVertexes; - ent = backEnd.currentEntity; - ambientLightInt = ent->ambientLightInt; - VectorCopy( ent->ambientLight, ambientLight ); - VectorCopy( ent->directedLight, directedLight ); - VectorCopy( ent->lightDir, lightDir ); - - v = tess.xyz[0]; - normal = tess.normal[0]; - - numVertexes = tess.numVertexes; - for (i = 0 ; i < numVertexes ; i++, v += 4, normal += 4) { - incoming = DotProduct (normal, lightDir); - if ( incoming <= 0 ) { - *(int *)&colors[i*4] = ambientLightInt; - continue; - } - j = myftol( ambientLight[0] + incoming * directedLight[0] ); - if ( j > 255 ) { - j = 255; - } - colors[i*4+0] = j; - - j = myftol( ambientLight[1] + incoming * directedLight[1] ); - if ( j > 255 ) { - j = 255; - } - colors[i*4+1] = j; - - j = myftol( ambientLight[2] + incoming * directedLight[2] ); - if ( j > 255 ) { - j = 255; - } - colors[i*4+2] = j; - - colors[i*4+3] = 255; - } -} - -void RB_CalcDiffuseColor( unsigned char *colors ) -{ -#if idppc_altivec - if (com_altivec->integer) { - // must be in a seperate function or G3 systems will crash. - RB_CalcDiffuseColor_altivec( colors ); - return; - } -#endif - RB_CalcDiffuseColor_scalar( colors ); -} - |