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openmohaa/code/renderergl1/tr_shade_calc.c

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/*
===========================================================================
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 Foobar; 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"
#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;
float base;
float amplitude;
float phase;
float frequency;
table = TableForFunc( wf->func );
if (wf->base != 1234567.0f) {
base = wf->base;
} else if (backEnd.currentEntity) {
base = (float)backEnd.currentEntity->e.surfaces[0] / 16.0 - 8.0;
} else {
base = r_static_shaderdata0->value;
}
if (wf->amplitude != 1234567.0f) {
amplitude = wf->amplitude;
} else if (backEnd.currentEntity) {
amplitude = (float)backEnd.currentEntity->e.surfaces[1] / 16.0;
} else {
amplitude = r_static_shaderdata1->value;
}
if (wf->phase != 1234567.0f) {
phase = wf->phase;
} else if (backEnd.currentEntity) {
phase = (float)backEnd.currentEntity->e.surfaces[2] / 16.0 - 8.0;
} else {
phase = r_static_shaderdata2->value;
}
if (wf->frequency != 1234567.0f) {
frequency = wf->frequency;
} else if (backEnd.currentEntity) {
frequency = (float)backEnd.currentEntity->e.surfaces[3] / 16.0;
} else {
frequency = r_static_shaderdata1->value;
}
if (!backEnd.currentEntity)
{
base *= r_static_shadermultiplier0->value;
amplitude *= r_static_shadermultiplier1->value;
phase *= r_static_shadermultiplier2->value;
frequency *= r_static_shadermultiplier3->value;
}
return WAVEVALUE( table, base, amplitude, phase, 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 );
}
/*
========================
RB_CalcTransWaveTexCoords
========================
*/
void RB_CalcTransWaveTexCoords(const waveForm_t* wf, float* st)
{
float p;
int i;
p = EvalWaveForm(wf);
for (i = 0; i < tess.numVertexes; i++, st += 2) {
st[0] += p;
}
}
/*
========================
RB_CalcTransWaveTexCoordsT
========================
*/
void RB_CalcTransWaveTexCoordsT(const waveForm_t* wf, float* st)
{
float p;
int i;
p = EvalWaveForm(wf);
for (i = 0; i < tess.numVertexes; i++, st += 2) {
st[1] += p;
}
}
/*
========================
RB_CalcBulgeTexCoords
========================
*/
void RB_CalcBulgeTexCoords(const waveForm_t* wf, float* st)
{
int i;
int off;
float offset;
float now;
float amplitude;
float width;
amplitude = wf->amplitude;
width = wf->base;
now = backEnd.refdef.time / 1000.0 * wf->frequency + wf->phase;
for (i = 0; i < tess.numVertexes; i++, st += 2) {
off = (now + st[0] * width) * FUNCTABLE_SIZE;
offset = tr.sinTable[off & FUNCTABLE_MASK] * amplitude;
}
}
/*
====================================================================
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;
float base;
float amplitude;
float phase;
float frequency;
if (ds->deformationWave.base != 1234567.0f) {
base = ds->deformationWave.base;
} else if (backEnd.currentEntity) {
base = (float)backEnd.currentEntity->e.surfaces[0] / 16.0 - 8.0;
} else {
base = r_static_shaderdata0->value;
}
if (ds->deformationWave.amplitude != 1234567.0f) {
amplitude = ds->deformationWave.amplitude;
} else if (backEnd.currentEntity) {
amplitude = (float)backEnd.currentEntity->e.surfaces[1] / 16.0;
} else {
amplitude = r_static_shaderdata1->value;
}
if (ds->deformationWave.phase != 1234567.0f) {
phase = ds->deformationWave.phase;
} else if (backEnd.currentEntity) {
phase = (float)backEnd.currentEntity->e.surfaces[2] / 16.0 - 8.0;
} else {
phase = r_static_shaderdata2->value;
}
if (ds->deformationWave.frequency != 1234567.0f) {
frequency = ds->deformationWave.frequency;
} else if (backEnd.currentEntity) {
frequency = (float)backEnd.currentEntity->e.surfaces[3] / 16.0;
} else {
frequency = r_static_shaderdata1->value;
}
if (!backEnd.currentEntity)
{
base *= r_static_shadermultiplier0->value;
amplitude *= r_static_shadermultiplier1->value;
phase *= r_static_shadermultiplier2->value;
frequency *= r_static_shadermultiplier3->value;
}
if ( 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, base, amplitude, phase + off, frequency );
VectorScale( normal, scale, offset );
xyz[0] += offset[0];
xyz[1] += offset[1];
xyz[2] += offset[2];
}
}
}
void RB_CalcFlapVertexes(deformStage_t* ds, texDirection_t coordsToUse)
{
int i;
vec3_t offset;
float scale;
vec4_t* xyz, * normal;
float* table;
float base;
float amplitude;
float phase;
float frequency;
float min, max;
vec2_t (*st)[2];
float vertexScale;
xyz = tess.xyz;
normal = tess.normal;
min = ds->bulgeWidth;
max = ds->bulgeHeight;
st = tess.texCoords;
if (ds->deformationWave.base != 1234567.0f) {
base = ds->deformationWave.base;
} else if (backEnd.currentEntity) {
base = (float)backEnd.currentEntity->e.surfaces[0] / 16.0 - 8.0;
} else {
base = r_static_shaderdata0->value;
}
if (ds->deformationWave.amplitude != 1234567.0f) {
amplitude = ds->deformationWave.amplitude;
} else if (backEnd.currentEntity) {
amplitude = (float)backEnd.currentEntity->e.surfaces[1] / 16.0;
} else {
amplitude = r_static_shaderdata1->value;
}
if (ds->deformationWave.phase != 1234567.0f) {
phase = ds->deformationWave.phase;
} else if (backEnd.currentEntity) {
phase = (float)backEnd.currentEntity->e.surfaces[2] / 16.0 - 8.0;
} else {
phase = r_static_shaderdata2->value;
}
if (ds->deformationWave.frequency != 1234567.0f) {
frequency = ds->deformationWave.frequency;
} else if (backEnd.currentEntity) {
frequency = (float)backEnd.currentEntity->e.surfaces[3] / 16.0;
} else {
frequency = r_static_shaderdata3->value;
}
if (!backEnd.currentEntity) {
base = base * r_static_shadermultiplier0->value;
amplitude = amplitude * r_static_shadermultiplier1->value;
phase = phase * r_static_shadermultiplier2->value;
frequency = frequency * r_static_shadermultiplier3->value;
}
if (frequency) {
table = TableForFunc(ds->deformationWave.func);
for (i = 0; i < tess.numVertexes; i++, xyz++, st++, normal++) {
float off;
off = ((*xyz)[0] + (*xyz)[1] + (*xyz)[2]) * ds->deformationSpread;
scale = WAVEVALUE(table, base, amplitude, phase, frequency);
vertexScale = (max - min) * (*st)[0][coordsToUse] + min;
offset[0] = scale * vertexScale * (*normal)[0];
offset[1] = scale * vertexScale * (*normal)[1];
offset[2] = scale * vertexScale * (*normal)[2];
VectorAdd(*xyz, offset, *xyz);
}
} else {
scale = EvalWaveForm(&ds->deformationWave);
for (i = 0; i < tess.numVertexes; i++, xyz++, st++, normal++) {
vertexScale = (max - min) * (*st)[0][coordsToUse] + min;
offset[0] = vertexScale * scale * (*normal)[0];
offset[1] = vertexScale * scale * (*normal)[1];
offset[2] = vertexScale * scale * (*normal)[2];
VectorAdd(*xyz, offset, *xyz);
}
}
}
/*
=========================
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;
size_t 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.ori.axis[0] );
out[1] = DotProduct( in, backEnd.ori.axis[1] );
out[2] = DotProduct( in, backEnd.ori.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\n", tess.shader->name);
}
if (tess.numIndexes != (tess.numVertexes >> 2) * 6) {
ri.Printf(PRINT_WARNING, "Autosprite shader %s had odd index count\n", tess.shader->name);
}
oldVerts = tess.numVertexes;
tess.numVertexes = 0;
tess.numIndexes = 0;
if (backEnd.currentEntity != &tr.worldEntity) {
GlobalVectorToLocal(backEnd.viewParms.ori.axis[1], leftDir);
GlobalVectorToLocal(backEnd.viewParms.ori.axis[2], upDir);
} else {
VectorCopy(backEnd.viewParms.ori.axis[1], leftDir);
VectorCopy(backEnd.viewParms.ori.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.currentStaticModel || backEnd.currentEntity->e.nonNormalizedAxes) {
float axisLength;
if (backEnd.currentStaticModel) {
axisLength = VectorLength(backEnd.currentStaticModel->axis[0]);
} else {
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, 3 },
{ 0, 2 },
{ 1, 3 },
{ 1, 2 },
{ 3, 2 }
};
static void Autosprite2Deform( void ) {
int i, j;
int indexes;
float *xyz;
vec3_t forward;
if ( tess.numVertexes & 3 ) {
ri.Printf( PRINT_WARNING, "Autosprite2 shader %s had odd vertex count\n", tess.shader->name );
}
if ( tess.numIndexes != ( tess.numVertexes >> 2 ) * 6 ) {
ri.Printf( PRINT_WARNING, "Autosprite2 shader %s had odd index count\n", tess.shader->name );
}
if ( backEnd.currentStaticModel || backEnd.currentEntity != &tr.worldEntity ) {
GlobalVectorToLocal( backEnd.viewParms.ori.axis[0], forward );
} else {
VectorCopy( backEnd.viewParms.ori.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 shortLengths[2];
int shortNums[2];
float longLengths[2];
int longNums[2];
vec3_t mid[2];
vec3_t major, minor;
float *v1, *v2, *v3, *v4;
qboolean firstOnLeft, secondOnLeft;
float edgeLength;
// find the midpoint
xyz = tess.xyz[i];
// identify the two shortest edges
shortNums[0] = shortNums[1] = 0;
shortLengths[0] = shortLengths[1] = 1000000000;
longNums[1] = longNums[0] = 0;
longLengths[1] = longLengths[0] = 0;
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 < shortLengths[0] ) {
shortNums[1] = shortNums[0];
shortLengths[1] = shortLengths[0];
shortNums[0] = j;
shortLengths[0] = l;
} else if ( l < shortLengths[1] ) {
shortNums[1] = j;
shortLengths[1] = l;
}
if (l > longLengths[0]) {
longNums[1] = longNums[0];
longLengths[1] = longLengths[0];
longNums[0] = j;
longLengths[0] = l;
} else if (l > longLengths[1]) {
longNums[1] = j;
longLengths[1] = l;
}
}
for ( j = 0 ; j < 2 ; j++ ) {
v1 = xyz + 4 * edgeVerts[shortNums[j]][0];
v2 = xyz + 4 * edgeVerts[shortNums[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 );
v1 = xyz + 4 * edgeVerts[shortNums[0]][0];
v2 = xyz + 4 * edgeVerts[shortNums[0]][1];
// we need to see which direction this edge
// is used to determine direction of projection
if (edgeVerts[shortNums[0]][0] == edgeVerts[longNums[0]][0]
|| edgeVerts[shortNums[0]][0] == edgeVerts[longNums[0]][1])
{
firstOnLeft = qtrue;
}
else
{
firstOnLeft = qfalse;
}
if (edgeVerts[shortNums[1]][0] == edgeVerts[longNums[1]][0]
|| edgeVerts[shortNums[1]][0] == edgeVerts[longNums[1]][1])
{
secondOnLeft = qtrue;
}
else
{
secondOnLeft = qfalse;
}
if (firstOnLeft == secondOnLeft)
{
v3 = xyz + 4 * edgeVerts[shortNums[1]][0];
v4 = xyz + 4 * edgeVerts[shortNums[1]][1];
}
else
{
v3 = xyz + 4 * edgeVerts[shortNums[1]][1];
v4 = xyz + 4 * edgeVerts[shortNums[1]][0];
}
// re-project the points
edgeLength = sqrt(shortLengths[0]) * 0.5;
v1[0] = -edgeLength * minor[0] + mid[0][0];
v1[1] = -edgeLength * minor[1] + mid[0][1];
v1[2] = -edgeLength * minor[2] + mid[0][2];
v2[0] = minor[0] * edgeLength + mid[0][0];
v2[1] = minor[1] * edgeLength + mid[0][1];
v2[2] = minor[2] * edgeLength + mid[0][2];
edgeLength = sqrt(shortLengths[1]) * 0.5;
v3[0] = -edgeLength * minor[0] + mid[1][0];
v3[1] = -edgeLength * minor[1] + mid[1][1];
v3[2] = -edgeLength * minor[2] + mid[1][2];
v4[0] = minor[0] * edgeLength + mid[1][0];
v4[1] = minor[1] * edgeLength + mid[1][1];
v4[2] = minor[2] * edgeLength + mid[1][2];
}
}
static void LightGlowDeform() {
int i;
int oldVerts;
float* xyz;
vec3_t mid, delta;
float radius, dist, ofs;
vec3_t forward, left, up;
vec3_t leftDir, upDir;
if (tess.numVertexes & 3) {
ri.Printf(PRINT_WARNING, "LightGlowDeform shader %s had odd vertex count\n", tess.shader->name);
}
if (tess.numIndexes != (tess.numVertexes >> 2) * 6) {
ri.Printf(PRINT_WARNING, "LightGlowDeform shader %s had odd index count\n", tess.shader->name);
}
oldVerts = tess.numVertexes;
tess.numVertexes = 0;
tess.numIndexes = 0;
if (backEnd.currentEntity == &tr.worldEntity)
{
VectorCopy(backEnd.viewParms.ori.axis[1], leftDir);
VectorCopy(backEnd.viewParms.ori.axis[2], upDir);
}
else
{
GlobalVectorToLocal(backEnd.viewParms.ori.axis[1], leftDir);
GlobalVectorToLocal(backEnd.viewParms.ori.axis[2], upDir);
}
for (i = 0; i < oldVerts; i += 4)
{
xyz = tess.xyz[i];
mid[0] = (xyz[0] + xyz[4] + xyz[8] + xyz[12]) * 0.25f;
mid[1] = (xyz[1] + xyz[5] + xyz[9] + xyz[13]) * 0.25f;
mid[2] = (xyz[2] + xyz[6] + xyz[10] + xyz[14]) * 0.25f;
VectorSubtract(xyz, mid, delta);
radius = VectorLength(delta) * 0.707f;
VectorAdd(mid, backEnd.ori.origin, delta);
VectorSubtract(backEnd.viewParms.ori.origin, delta, forward);
dist = VectorNormalize(forward) - 4.0;
VectorScale(forward, radius, forward);
VectorScale(leftDir, radius, left);
VectorScale(upDir, radius, up);
if (backEnd.viewParms.isMirror)
{
VectorSubtract(vec3_origin, forward, forward);
VectorSubtract(vec3_origin, left, left);
}
if (backEnd.currentStaticModel || backEnd.currentEntity->e.nonNormalizedAxes)
{
float axisLength;
if (backEnd.currentStaticModel) {
axisLength = VectorLength(backEnd.currentStaticModel->axis[0]);
} else {
axisLength = VectorLength(backEnd.currentEntity->e.axis[0]);
}
if (axisLength != 0.0f) {
VectorScale(forward, axisLength, forward);
VectorScale(left, axisLength, left);
VectorScale(up, axisLength, up);
} else {
VectorClear(forward);
VectorClear(left);
VectorClear(up);
}
}
ofs = VectorLength(forward);
if (ofs > dist)
{
VectorNormalizeFast(forward);
VectorScale(forward, dist, forward);
}
VectorAdd(mid, forward, mid);
RB_AddQuadStamp(mid, left, up, tess.vertexColors[i]);
}
}
/*
=====================
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_AUTOSPRITE:
AutospriteDeform();
break;
case DEFORM_AUTOSPRITE2:
Autosprite2Deform();
break;
case DEFORM_LIGHTGLOW:
LightGlowDeform();
break;
case DEFORM_FLAP_S:
RB_CalcFlapVertexes(ds, USE_S_COORDS);
break;
case DEFORM_FLAP_T:
RB_CalcFlapVertexes(ds, USE_T_COORDS);
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[4];
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_CalcColorFromConstant
*/
void RB_CalcColorFromConstant(unsigned char* dstColors, unsigned char* constantColor)
{
int i;
for (i = 0; i < tess.numVertexes; i++) {
dstColors[i * 4] = constantColor[0];
dstColors[i * 4 + 1] = constantColor[1];
dstColors[i * 4 + 2] = constantColor[2];
dstColors[i * 4 + 3] = constantColor[3];
}
}
/*
** RB_CalcRGBFromDot
*/
void RB_CalcRGBFromDot(unsigned char* colors, float alphaMin, float alphaMax)
{
int i;
vec3_t viewInModel;
for (i = 0; i < tess.numVertexes; i++, colors += 4) {
float f;
VectorSubtract(backEnd.ori.viewOrigin, tess.xyz[i], viewInModel);
VectorNormalizeFast(viewInModel);
f = Square(DotProduct(tess.normal[i], viewInModel));
f = ((alphaMax - alphaMin) * f + alphaMin) * 255.0;
f = f - Q_max((int)(f - 255), 0);
colors[0] = colors[1] = colors[2] = (unsigned char)Q_max(f, 0);
}
}
/*
** RB_CalcRGBFromOneMinusDot
*/
void RB_CalcRGBFromOneMinusDot(unsigned char* colors, float alphaMin, float alphaMax)
{
int i;
vec3_t viewInModel;
for (i = 0; i < tess.numVertexes; i++, colors += 4) {
float f;
VectorSubtract(backEnd.ori.viewOrigin, tess.xyz[i], viewInModel);
VectorNormalizeFast(viewInModel);
f = 1.0 - Square(DotProduct(tess.normal[i], viewInModel));
f = ((alphaMax - alphaMin) * f + alphaMin) * 255.0;
f = f - Q_max((int)(f - 255), 0);
colors[0] = colors[1] = colors[2] = (unsigned char)Q_max(f, 0);
}
}
/*
** RB_CalcAlphaFromConstant
*/
void RB_CalcAlphaFromConstant(unsigned char* dstColors, int constantAlpha)
{
int i;
for (i = 0; i < tess.numVertexes; i++) {
dstColors[i * 4 + 3] = constantAlpha;
}
}
/*
** RB_CalcAlphaFromDot
*/
void RB_CalcAlphaFromDot(unsigned char* colors, float alphaMin, float alphaMax)
{
int i;
vec3_t viewInModel;
for (i = 0; i < tess.numVertexes; i++, colors += 4) {
float f;
VectorSubtract(backEnd.ori.viewOrigin, tess.xyz[i], viewInModel);
VectorNormalizeFast(viewInModel);
f = Square(DotProduct(tess.normal[i], viewInModel));
f = ((alphaMax - alphaMin) * f + alphaMin) * 255.0;
f = f - Q_max((int)(f - 255), 0);
colors[0] = colors[1] = colors[2] = (unsigned char)Q_max(f, 0);
}
}
/*
** RB_CalcAlphaFromHeightFade
*/
void RB_CalcAlphaFromHeightFade(unsigned char* colors, float alphaMin, float alphaMax)
{
int i;
float dist;
float alpha;
for (i = 0; i < tess.numVertexes; i++) {
dist = fabs(backEnd.ori.viewOrigin[2] - tess.xyz[i][2]);
dist = Q_clamp_float(dist, alphaMin, alphaMax);
// Calculate the alpha height
alpha = (dist - alphaMin) / (alphaMax - alphaMin);
colors[i * 4 + 3] = (unsigned char)((1.f - alpha) * 255.0);
}
}
/*
** RB_CalcAlphaFromOneMinusDot
*/
void RB_CalcAlphaFromOneMinusDot(unsigned char* colors, float alphaMin, float alphaMax)
{
int i;
vec3_t viewInModel;
for (i = 0; i < tess.numVertexes; i++, colors += 4) {
float f;
VectorSubtract(backEnd.ori.viewOrigin, tess.xyz[i], viewInModel);
VectorNormalizeFast(viewInModel);
f = 1.0 - Square(DotProduct(tess.normal[i], viewInModel));
f = ((alphaMax - alphaMin) * f + alphaMin) * 255.0;
f = f - Q_max((int)(f - 255), 0);
colors[0] = colors[1] = colors[2] = (unsigned char)Q_max(f, 0);
}
}
/*
** RB_CalcAlphaFromTexCoords
*/
void RB_CalcAlphaFromTexCoords(unsigned char* colors, float alphaMin, float alphaMax, int alphaMinCap, int alphaCap, float sWeight, float tWeight, float* st)
{
int i;
for (i = 0; i < tess.numVertexes; i++, colors += 4, st += 2) {
float f;
f = sWeight * tess.texCoords[i][0][0] + tWeight * tess.texCoords[i][0][1];
f = ((alphaMax - alphaMin) * f + alphaMin) * 255.0;
f = f - Q_max((int)(f - alphaCap), 0);
f = alphaMinCap + Q_max((int)(f - alphaMinCap), 0);
colors[3] = (unsigned char)f;
}
}
/*
** RB_CalcRGBFromTexCoords
*/
void RB_CalcRGBFromTexCoords(unsigned char* colors, float alphaMin, float alphaMax, int alphaMinCap, int alphaCap, float sWeight, float tWeight, float* st)
{
int i;
for (i = 0; i < tess.numVertexes; i++, colors += 4, st += 2) {
float f;
f = sWeight * tess.texCoords[i][0][0] + tWeight * tess.texCoords[i][0][1];
f = ((alphaMax - alphaMin) * f + alphaMin) * 255.0;
f = f - Q_max((int)(f - alphaCap), 0);
f = alphaMinCap + Q_max((int)(f - alphaMinCap), 0);
colors[0] = colors[1] = colors[2] = (unsigned char)f;
}
}
/*
** 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, unsigned char* constantColor)
{
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;
}
if (constantColor)
{
color[0] = constantColor[0] * glow;
color[1] = constantColor[1] * glow;
color[2] = constantColor[2] * glow;
}
else
{
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;
}
}
/*
====================================================================
TEX COORDS
====================================================================
*/
/*
** 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.ori.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_CalcEnvironmentTexCoords
*/
void RB_CalcEnvironmentTexCoords2(float* st)
{
int i;
float* v, * normal;
vec3_t viewer, reflected, worldReflected;
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.ori.viewOrigin, v, viewer);
VectorNormalizeFast(viewer);
d = DotProduct(normal, viewer);
if (d > 0.0f) {
VectorCopy(viewer, reflected);
} else {
d *= -2;
reflected[0] = normal[0] * d + viewer[0];
reflected[1] = normal[1] * d + viewer[1];
reflected[2] = normal[2] * d + viewer[2];
}
worldReflected[0] = reflected[0] * backEnd.ori.axis[0][0];
worldReflected[2] = reflected[0] * backEnd.ori.axis[0][2];
worldReflected[0] = backEnd.ori.axis[1][0] * reflected[1] + worldReflected[0];
worldReflected[2] = backEnd.ori.axis[1][2] * reflected[1] + worldReflected[2];
worldReflected[0] = backEnd.ori.axis[2][0] * reflected[2] + worldReflected[0];
worldReflected[2] = backEnd.ori.axis[2][2] * reflected[2] + worldReflected[2];
st[0] = 0.5 + reflected[1] * 0.5;
st[1] = 0.5 - reflected[2] * 0.5;
}
}
/*
** RB_CalcSunReflectionTexCoords
*/
void RB_CalcSunReflectionTexCoords(float* st) {
int i;
vec3_t viewer;
vec3_t reflected;
vec3_t sunReflected;
float d;
float* v;
float* normal;
vec3_t sunAxis[3];
v = tess.xyz[0];
normal = tess.normal[0];
sunAxis[0][0] = tr.sunDirection[0];
sunAxis[0][1] = tr.sunDirection[1];
sunAxis[0][2] = tr.sunDirection[2];
sunAxis[1][0] = tr.sunDirection[1];
sunAxis[1][1] = -tr.sunDirection[0];
sunAxis[1][2] = 0.0;
VectorNormalizeFast(sunAxis[1]);
CrossProduct(sunAxis[0], sunAxis[1], sunAxis[2]);
for (i = 0; i < tess.numVertexes; i++, v += 4, normal += 4, st += 2) {
VectorSubtract(v, backEnd.ori.viewOrigin, viewer);
VectorNormalizeFast(viewer);
d = DotProduct(viewer, normal);
if (d > 0) {
VectorCopy(viewer, reflected);
} else {
d *= -2;
VectorMA(viewer, d, normal, reflected);
}
VectorScale(sunAxis[0], reflected[0], sunReflected);
VectorMA(sunReflected, reflected[2], sunAxis[1], sunReflected);
VectorMA(sunReflected, -reflected[1], sunAxis[2], sunReflected);
st[0] = sunReflected[1] + 0.5;
st[1] = sunReflected[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_CalcOffsetTexCoords
*/
void RB_CalcOffsetTexCoords( const float *offset, float *st )
{
int i;
float offsetS, offsetT;
if (offset[0] != 1234567) {
offsetS = offset[0];
} else if (backEnd.currentEntity) {
offsetS = backEnd.currentEntity->e.shader_data[0];
} else {
offsetS = r_static_shaderdata0->value;
}
if (offset[0] != 1234567) {
offsetT = offset[1];
} else if (backEnd.currentEntity) {
offsetT = backEnd.currentEntity->e.shader_data[1];
} else {
offsetT = r_static_shaderdata1->value;
}
if (!backEnd.currentEntity) {
offsetS = offsetS * r_static_shadermultiplier0->value;
offsetT = offsetT * r_static_shadermultiplier1->value;
}
for (i = 0; i < tess.numVertexes; i++, st += 2) {
float s, t;
s = st[0];
t = st[1];
st[0] = s + offsetS;
st[1] = t + offsetT;
}
}
/*
** RB_CalcParallaxTexCoords
*/
void RB_CalcParallaxTexCoords( const float *rate, float *st )
{
int i;
float offsetS, offsetT;
offsetS = tr.refdef.vieworg[0] * rate[0];
offsetT = tr.refdef.vieworg[1] * rate[1];
for (i = 0; i < tess.numVertexes; i++, st += 2) {
st[0] += offsetS;
st[1] += offsetT;
}
}
static vec3_t rb_baseaxis[18];
void RB_TextureAxisFromPlane(const vec3_t normal, vec3_t xv, vec3_t yv)
{
int bestaxis;
vec_t dot;
vec_t best;
int i;
if (normal[0] == 1) {
bestaxis = 2;
} else if (normal[0] == -1) {
bestaxis = 3;
} else if (normal[1] == 1) {
bestaxis = 4;
} else if (normal[1] == -1) {
bestaxis = 5;
} else if (normal[2] == 1) {
bestaxis = 0;
} else if (normal[2] == -1) {
bestaxis = 1;
} else {
best = 0;
bestaxis = 0;
for (i = 0; i < 6; i++) {
dot = DotProduct(rb_baseaxis[i * 3], normal);
if (dot > best) {
best = dot;
bestaxis = i;
}
}
}
VectorCopy(rb_baseaxis[bestaxis * 3 + 1], xv);
VectorCopy(rb_baseaxis[bestaxis * 3 + 2], yv);
}
void RB_QuakeTextureVecs(const vec3_t normal, const vec2_t scale, vec3_t mappingVecs[2])
{
RB_TextureAxisFromPlane(normal, mappingVecs[0], mappingVecs[1]);
VectorScale(mappingVecs[0], scale[0], mappingVecs[0]);
VectorScale(mappingVecs[1], scale[1], mappingVecs[1]);
}
/*
** RB_CalcMacroTexCoords
*/
void RB_CalcMacroTexCoords( const float* rate, float *st )
{
int i;
vec3_t vecs[2];
vec_t* v;
vec_t* normal;
float width, height;
v = tess.xyz[0];
normal = tess.normal[0];
width = (float)tess.shader->unfoggedStages[0]->bundle[0].image[0]->uploadWidth;
height = (float)tess.shader->unfoggedStages[0]->bundle[0].image[0]->uploadHeight;
for (i = 0; i < tess.numVertexes; i++, v += 4, normal += 4, st += 2) {
RB_QuakeTextureVecs(normal, rate, vecs);
st[0] = DotProduct(vecs[0], v) / width;
st[1] = DotProduct(vecs[1], v) / height;
}
}
/*
** 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 degsPerSecondCoef, float* st, float start)
{
float timeScale = tess.shaderTime;
float degs;
int index;
float sinValue, cosValue;
texModInfo_t tmi;
if (degsPerSecond != 1234567) {
degs = -degsPerSecond * degsPerSecondCoef * tess.shaderTime - start;
} else if (backEnd.currentEntity) {
degs = -backEnd.currentEntity->e.shader_data[0] * degsPerSecondCoef * tess.shaderTime - start;
} else {
degs = r_static_shaderdata0->value;
}
if (!backEnd.currentEntity) {
degs *= r_static_shadermultiplier0->value;
}
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 __linux__ || defined __FreeBSD__ ) && (defined __i386__ ) ) // rb010123
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, float alphaMax, vec3_t lightOrigin) {
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.ori.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;
}
}
void RB_CalcLightGridColor(unsigned char* colors)
{
int i;
if (!backEnd.currentEntity) {
for (i = 0; i < tess.numVertexes; i++) {
colors[i * 4] = ((byte*)&backEnd.currentStaticModel->iGridLighting)[0];
colors[i * 4 + 1] = ((byte*)&backEnd.currentStaticModel->iGridLighting)[1];
colors[i * 4 + 2] = ((byte*)&backEnd.currentStaticModel->iGridLighting)[2];
colors[i * 4 + 3] = ((byte*)&backEnd.currentStaticModel->iGridLighting)[3];
}
}
else if (backEnd.currentEntity != &tr.worldEntity) {
for (i = 0; i < tess.numVertexes; i++) {
colors[i * 4] = ((byte*)&backEnd.currentEntity->iGridLighting)[0];
colors[i * 4 + 1] = ((byte*)&backEnd.currentEntity->iGridLighting)[1];
colors[i * 4 + 2] = ((byte*)&backEnd.currentEntity->iGridLighting)[2];
colors[i * 4 + 3] = ((byte*)&backEnd.currentEntity->iGridLighting)[3];
}
}
else {
ri.Printf(PRINT_ALL,
"##### shader '%s' incorrectly uses rgbGen lightingGrid or lightingSpherical; was rgbGen vertex intended?\n",
tess.shader->name);
for (i = 0; i < tess.numVertexes; i++) {
colors[i * 4] = 0xFF;
colors[i * 4 + 1] = 0xFF;
colors[i * 4 + 2] = 0xFF;
colors[i * 4 + 3] = 0xFF;
}
}
}
void RB_CalcAlphaFromDotView(unsigned char* colors, float alphaMin, float alphaMax)
{
int i;
vec3_t viewInModel;
for (i = 0; i < tess.numVertexes; i++, colors += 4) {
union {
float f;
int i;
} u;
VectorCopy(tr.refdef.viewaxis[0], viewInModel);
VectorNormalizeFast(viewInModel);
u.f = DotProduct(viewInModel, tess.normal[i]);
u.f = fabs(u.f);
ri.Printf(PRINT_ALL, "normal: %f %f %f dot: %f i %d\n", tess.normal[i][0], tess.normal[i][1], tess.normal[i][2], u.f, i);
u.f = ((alphaMax - alphaMin) * u.f + alphaMin) * 255.0;
u.f = u.f - (float)(~((int)(u.f - 255.0) >> 31) & (int)(u.f - 255.0));
u.i &= ~(u.i >> 31);
colors[3] = u.i;
}
}
void RB_CalcAlphaFromOneMinusDotView(unsigned char* colors, float alphaMin, float alphaMax)
{
int i;
vec3_t viewInModel;
for (i = 0; i < tess.numVertexes; i++, colors += 4) {
union {
float f;
int i;
} u;
VectorCopy(tr.refdef.viewaxis[0], viewInModel);
VectorNormalizeFast(viewInModel);
u.f = DotProduct(viewInModel, tess.normal[i]);
u.f = fabs(u.f);
u.f = 1.0 - u.f;
ri.Printf(PRINT_ALL, "normal: %f %f %f dot: %f i %d\n", tess.normal[i][0], tess.normal[i][1], tess.normal[i][2], u.f, i);
u.f = ((alphaMax - alphaMin) * u.f + alphaMin) * 255.0;
u.f = u.f - (long double)(~((int)(u.f - 255.0) >> 31) & (int)(u.f - 255.0));
u.i &= ~(u.i >> 31);
colors[3] = u.i;
}
}
/*
** RB_CalcDiffuseColor
**
** The basic vertex lighting calc
*/
void RB_CalcDiffuseColor( 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;
#if idppc_altivec
vector unsigned char vSel = (vector unsigned char)(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;
#endif
ent = backEnd.currentEntity;
ambientLightInt = ent->ambientLightInt;
#if idppc_altivec
// 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 );
#else
VectorCopy( ent->ambientLight, ambientLight );
VectorCopy( ent->directedLight, directedLight );
VectorCopy( ent->lightDir, lightDir );
#endif
v = tess.xyz[0];
normal = tess.normal[0];
#if idppc_altivec
normalPerm = vec_lvsl(0,normal);
#endif
numVertexes = tess.numVertexes;
for (i = 0 ; i < numVertexes ; i++, v += 4, normal += 4) {
#if idppc_altivec
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
#else
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;
#endif
}
}
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