/**
* Prepare a mesh for drawing. Compute mesh's final vertex positions
* given a skeleton. Put the vertices in vertex arrays.
*/
void GenerateGPUVertices (md5_mesh_t *mesh, const md5_joint_t *skeleton)
{
int i, j;
const md5_weight_t *weight;
const md5_joint_t *joint ;
vec3_t tmpNormal,tmpVertex;
vec3_t normalAccumulator;
#ifdef TANGENT_ENABLED
vec3_t tmpTangent;
vec3_t tangentAccumulator;
#endif
/* Setup vertices */
vertex_t* currentVertex = mesh->vertexArray ;
for (i = 0; i < mesh->num_verts; ++i)
{
vectorClear(currentVertex->pos);
vectorClear(normalAccumulator);
#ifdef TANGENT_ENABLED
vectorClear(tangentAccumulator);
#endif
// Calculate final vertex to draw with weights
for (j = 0; j < mesh->vertices[i].count; j++)
{
weight= &mesh->weights[mesh->vertices[i].start + j];
joint = &skeleton[weight->joint];
// Calculate transformed vertex for this weight
Quat_rotatePoint (joint->orient, weight->pos, tmpVertex);
currentVertex->pos[0] += (joint->pos[0] + tmpVertex[0]) * weight->bias;
currentVertex->pos[1] += (joint->pos[1] + tmpVertex[1]) * weight->bias;
currentVertex->pos[2] += (joint->pos[2] + tmpVertex[2]) * weight->bias;
// Same thing for normal
Quat_rotateShortPoint (joint->orient, weight->normal, tmpNormal);
vectorAdd(normalAccumulator,tmpNormal,normalAccumulator);
#ifdef TANGENT_ENABLED
Quat_rotateShortPoint (joint->orient, weight->tangent, tmpTangent);
vectorAdd(tangentAccumulator,tmpTangent,tangentAccumulator);
#endif
}
//Need to normalize normal
normalize(normalAccumulator);
vectorScale(normalAccumulator,32767,currentVertex->normal);
#ifdef TANGENT_ENABLED
normalize(tangentAccumulator);
vectorScale(tangentAccumulator,32767,currentVertex->tangent);
#endif
currentVertex++;
}
}
void MD5_GenerateSkin (md5_mesh_t* mesh, md5_bone_t* bones)
{
int i, j;
md5_weight_t* weight;
md5_bone_t* bone ;
vec3_t normalAccumulator;
vec3_t tangentAccumulator;
vertex_t* currentVertex;
//printf("\nGenerating weight positions.\n");
// Generate weight position in modelSpace
weight = mesh->weights;
for (i = 0; i < mesh->numWeights; i++,weight++)
{
bone = &bones[weight->boneId];
Quat_rotatePoint (bone->orientation, weight->boneSpacePos, weight->modelSpacePos);
vectorAdd(weight->modelSpacePos,bone->position,weight->modelSpacePos);
// printf("weight[%d].pos=[%.2f,%.2f,%.2f]\n",i,bone->position[0],bone->position[1],bone->position[2]);
// printf("weight[%d].pos=[%.2f,%.2f,%.2f]\n",i,weight->modelSpacePos[0],weight->modelSpacePos[1],weight->modelSpacePos[2]);
Quat_rotateShortPoint (bone->orientation, weight->boneSpaceNormal, weight->modelSpaceNormal);
Quat_rotateShortPoint (bone->orientation, weight->boneSpaceTangent,weight->modelSpaceTangent);
}
/* Setup vertices */
currentVertex = mesh->vertexArray ;
for (i = 0; i < mesh->numVertices; ++i)
{
vectorClear(currentVertex->pos);
vectorClear(normalAccumulator);
vectorClear(tangentAccumulator);
// Calculate final vertex to draw with weights
for (j = 0; j < mesh->vertices[i].count; j++)
{
weight= &mesh->weights[mesh->vertices[i].start + j];
bone = &bones[weight->boneId];
// Calculate transformed vertex for this weight
currentVertex->pos[0] += weight->modelSpacePos[0] * weight->bias;
currentVertex->pos[1] += weight->modelSpacePos[1] * weight->bias;
currentVertex->pos[2] += weight->modelSpacePos[2] * weight->bias;
// Same thing for normal
vectorAdd(normalAccumulator,weight->modelSpaceNormal,normalAccumulator);
vectorAdd(tangentAccumulator,weight->modelSpaceTangent,tangentAccumulator);
}
// printf("currentVertex[%d].pos=[%.2f,%.2f,%.2f]\n",i,currentVertex->pos[0],currentVertex->pos[1],currentVertex->pos[2]);
//Need to normalize normal
normalize(normalAccumulator);
vectorScale(normalAccumulator,32767,currentVertex->normal);
// printf("currentVertex[%d].normal=[%hu,%hu,%hu]\n",i,currentVertex->normal[0],currentVertex->normal[1],currentVertex->normal[2]);
normalize(tangentAccumulator);
vectorScale(tangentAccumulator,32767,currentVertex->tangent);
// printf("currentVertex[%d].tangent=[%hu,%hu,%hu]\n",i,currentVertex->tangent[0],currentVertex->tangent[1],currentVertex->tangent[2]);
currentVertex++;
}
}
