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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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37
code/renderergl2/tr_model.c
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@ -689,11 +689,10 @@ static qboolean R_LoadMD3(model_t * mod, int lod, void *buffer, int bufferSize,
for (i = 0; i < mdvModel->numSurfaces; i++, vboSurf++, surf++)
{
vec3_t *verts;
vec3_t *normals;
vec2_t *texcoords;
uint8_t *normals;
#ifdef USE_VERT_TANGENT_SPACE
vec3_t *tangents;
vec3_t *bitangents;
uint8_t *tangents;
#endif
byte *data;
@ -701,7 +700,7 @@ static qboolean R_LoadMD3(model_t * mod, int lod, void *buffer, int bufferSize,
int ofs_xyz, ofs_normal, ofs_st;
#ifdef USE_VERT_TANGENT_SPACE
int ofs_tangent, ofs_bitangent;
int ofs_tangent;
#endif
dataSize = 0;
@ -710,14 +709,11 @@ static qboolean R_LoadMD3(model_t * mod, int lod, void *buffer, int bufferSize,
dataSize += surf->numVerts * mdvModel->numFrames * sizeof(*verts);
ofs_normal = dataSize;
dataSize += surf->numVerts * mdvModel->numFrames * sizeof(*normals);
dataSize += surf->numVerts * mdvModel->numFrames * sizeof(*normals) * 4;
#ifdef USE_VERT_TANGENT_SPACE
ofs_tangent = dataSize;
dataSize += surf->numVerts * mdvModel->numFrames * sizeof(*tangents);
ofs_bitangent = dataSize;
dataSize += surf->numVerts * mdvModel->numFrames * sizeof(*bitangents);
dataSize += surf->numVerts * mdvModel->numFrames * sizeof(*tangents) * 4;
#endif
ofs_st = dataSize;
@ -729,18 +725,25 @@ static qboolean R_LoadMD3(model_t * mod, int lod, void *buffer, int bufferSize,
normals = (void *)(data + ofs_normal);
#ifdef USE_VERT_TANGENT_SPACE
tangents = (void *)(data + ofs_tangent);
bitangents = (void *)(data + ofs_bitangent);
#endif
texcoords = (void *)(data + ofs_st);
v = surf->verts;
for ( j = 0; j < surf->numVerts * mdvModel->numFrames ; j++, v++ )
{
vec3_t nxt;
CrossProduct(v->normal, v->tangent, nxt);
VectorCopy(v->xyz, verts[j]);
VectorCopy(v->normal, normals[j]);
normals[j*4+0] = (uint8_t)(v->normal[0] * 127.5f + 128.0f);
normals[j*4+1] = (uint8_t)(v->normal[1] * 127.5f + 128.0f);
normals[j*4+2] = (uint8_t)(v->normal[2] * 127.5f + 128.0f);
normals[j*4+3] = 0;
#ifdef USE_VERT_TANGENT_SPACE
VectorCopy(v->tangent, tangents[j]);
VectorCopy(v->bitangent, bitangents[j]);
tangents[j*4+0] = (uint8_t)(v->tangent[0] * 127.5f + 128.0f);
tangents[j*4+1] = (uint8_t)(v->tangent[1] * 127.5f + 128.0f);
tangents[j*4+2] = (uint8_t)(v->tangent[2] * 127.5f + 128.0f);
tangents[j*4+3] = (DotProduct(nxt, v->bitangent) < 0.0f) ? 0 : 255;
#endif
}
@ -765,20 +768,18 @@ static qboolean R_LoadMD3(model_t * mod, int lod, void *buffer, int bufferSize,
vboSurf->vbo->ofs_normal = ofs_normal;
#ifdef USE_VERT_TANGENT_SPACE
vboSurf->vbo->ofs_tangent = ofs_tangent;
vboSurf->vbo->ofs_bitangent = ofs_bitangent;
#endif
vboSurf->vbo->ofs_st = ofs_st;
vboSurf->vbo->stride_xyz = sizeof(*verts);
vboSurf->vbo->stride_normal = sizeof(*normals);
vboSurf->vbo->stride_normal = sizeof(*normals) * 4;
#ifdef USE_VERT_TANGENT_SPACE
vboSurf->vbo->stride_tangent = sizeof(*tangents);
vboSurf->vbo->stride_bitangent = sizeof(*bitangents);
vboSurf->vbo->stride_tangent = sizeof(*tangents) * 4;
#endif
vboSurf->vbo->stride_st = sizeof(*st);
vboSurf->vbo->size_xyz = sizeof(*verts) * surf->numVerts;
vboSurf->vbo->size_normal = sizeof(*normals) * surf->numVerts;
vboSurf->vbo->size_normal = sizeof(*normals) * surf->numVerts * 4;
ri.Free(data);