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OpenGL2: Calculate bitangent in shader, and store normal/tangent as normalized byte arrays.

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This commit is contained in:
SmileTheory 2013-11-12 19:21:51 -08:00
parent a53e7c3074
commit 6e5f8cc918
15 changed files with 268 additions and 271 deletions
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46
code/renderergl2/tr_shade_calc.c
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@ -116,7 +116,7 @@ void RB_CalcDeformVertexes( deformStage_t *ds )
vec3_t offset;
float scale;
float *xyz = ( float * ) tess.xyz;
float *normal = ( float * ) tess.normal;
uint8_t *normal = ( uint8_t * ) tess.normal;
float *table;
if ( ds->deformationWave.frequency == 0 )
@ -125,7 +125,9 @@ void RB_CalcDeformVertexes( deformStage_t *ds )
for ( i = 0; i < tess.numVertexes; i++, xyz += 4, normal += 4 )
{
VectorScale( normal, scale, offset );
offset[0] = (normal[0] / 127.5f - 1.0f) * scale;
offset[1] = (normal[1] / 127.5f - 1.0f) * scale;
offset[2] = (normal[2] / 127.5f - 1.0f) * scale;
xyz[0] += offset[0];
xyz[1] += offset[1];
@ -145,7 +147,9 @@ void RB_CalcDeformVertexes( deformStage_t *ds )
ds->deformationWave.phase + off,
ds->deformationWave.frequency );
VectorScale( normal, scale, offset );
offset[0] = (normal[0] / 127.5f - 1.0f) * scale;
offset[1] = (normal[1] / 127.5f - 1.0f) * scale;
offset[2] = (normal[2] / 127.5f - 1.0f) * scale;
xyz[0] += offset[0];
xyz[1] += offset[1];
@ -165,25 +169,35 @@ void RB_CalcDeformNormals( deformStage_t *ds ) {
int i;
float scale;
float *xyz = ( float * ) tess.xyz;
float *normal = ( float * ) tess.normal;
uint8_t *normal = ( uint8_t * ) tess.normal;
for ( i = 0; i < tess.numVertexes; i++, xyz += 4, normal += 4 ) {
vec3_t fNormal;
fNormal[0] = normal[0] / 127.5f - 1.0f;
fNormal[1] = normal[1] / 127.5f - 1.0f;
fNormal[2] = normal[2] / 127.5f - 1.0f;
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;
fNormal[ 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;
fNormal[ 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;
fNormal[ 2 ] += ds->deformationWave.amplitude * scale;
VectorNormalizeFast( normal );
VectorNormalizeFast( fNormal );
normal[0] = (uint8_t)(fNormal[0] * 127.5f + 128.0f);
normal[1] = (uint8_t)(fNormal[0] * 127.5f + 128.0f);
normal[2] = (uint8_t)(fNormal[0] * 127.5f + 128.0f);
}
}
@ -197,7 +211,7 @@ 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;
uint8_t *normal = ( uint8_t * ) tess.normal;
float now;
now = backEnd.refdef.time * ds->bulgeSpeed * 0.001f;
@ -210,9 +224,9 @@ void RB_CalcBulgeVertexes( deformStage_t *ds ) {
scale = tr.sinTable[ off & FUNCTABLE_MASK ] * ds->bulgeHeight;
xyz[0] += normal[0] * scale;
xyz[1] += normal[1] * scale;
xyz[2] += normal[2] * scale;
xyz[0] += (normal[0] / 127.5f - 1.0f) * scale;
xyz[1] += (normal[1] / 127.5f - 1.0f) * scale;
xyz[2] += (normal[2] / 127.5f - 1.0f) * scale;
}
}
@ -262,11 +276,17 @@ void DeformText( const char *text ) {
float color[4];
float bottom, top;
vec3_t mid;
vec3_t fNormal;
height[0] = 0;
height[1] = 0;
height[2] = -1;
CrossProduct( tess.normal[0], height, width );
fNormal[0] = tess.normal[0][0] / 127.5f - 1.0f;
fNormal[1] = tess.normal[0][1] / 127.5f - 1.0f;
fNormal[2] = tess.normal[0][2] / 127.5f - 1.0f;
CrossProduct( fNormal, height, width );
// find the midpoint of the box
VectorClear( mid );