/* \brief get name of skin bone (needs real bone) */
GLHCKAPI const char* glhckSkinBoneGetName(glhckSkinBone *object)
{
if (object->bone) return glhckBoneGetName(object->bone);
return NULL;
}
static glhckBone* processBones(const struct aiNode *boneNd, const struct aiNode *nd, const struct aiMesh *mesh,
glhckBone **bones, glhckSkinBone **skinBones, unsigned int *numBones)
{
kmMat4 matrix, transposed;
glhckBone *bone = NULL, *child;
glhckSkinBone *skinBone = NULL;
const struct aiBone *assimpBone;
unsigned int i;
assert(boneNd && nd);
assert(mesh);
assert(numBones);
/* something went wrong */
if (!numBones || *numBones >= ASSIMP_BONES_MAX)
goto fail;
/* don't allow duplicates */
for (i = 0; i != *numBones; ++i)
if (!strcmp(glhckBoneGetName(bones[i]), boneNd->mName.data))
goto fail;
/* create new bone */
if (!(bone = glhckBoneNew()) || !(skinBone = glhckSkinBoneNew()))
goto fail;
/* set bone to list */
bones[*numBones] = bone;
skinBones[*numBones] = skinBone;
*numBones = *numBones+1;
/* store bone name */
glhckBoneName(bone, boneNd->mName.data);
glhckSkinBoneBone(skinBone, bone);
/* skip this part by creating dummy bone, if this information is not found */
if ((assimpBone = findBone(mesh, bone->name))) {
/* get offset matrix */
matrix.mat[0] = assimpBone->mOffsetMatrix.a1;
matrix.mat[1] = assimpBone->mOffsetMatrix.a2;
matrix.mat[2] = assimpBone->mOffsetMatrix.a3;
matrix.mat[3] = assimpBone->mOffsetMatrix.a4;
matrix.mat[4] = assimpBone->mOffsetMatrix.b1;
matrix.mat[5] = assimpBone->mOffsetMatrix.b2;
matrix.mat[6] = assimpBone->mOffsetMatrix.b3;
matrix.mat[7] = assimpBone->mOffsetMatrix.b4;
matrix.mat[8] = assimpBone->mOffsetMatrix.c1;
matrix.mat[9] = assimpBone->mOffsetMatrix.c2;
matrix.mat[10] = assimpBone->mOffsetMatrix.c3;
matrix.mat[11] = assimpBone->mOffsetMatrix.c4;
matrix.mat[12] = assimpBone->mOffsetMatrix.d1;
matrix.mat[13] = assimpBone->mOffsetMatrix.d2;
matrix.mat[14] = assimpBone->mOffsetMatrix.d3;
matrix.mat[15] = assimpBone->mOffsetMatrix.d4;
/* get weights */
glhckVertexWeight weights[assimpBone->mNumWeights];
memset(weights, 0, sizeof(weights));
for (i = 0; i != assimpBone->mNumWeights; ++i) {
weights[i].vertexIndex = assimpBone->mWeights[i].mVertexId;
weights[i].weight = assimpBone->mWeights[i].mWeight;
}
/* assimp is row-major, kazmath is column-major */
kmMat4Transpose(&transposed, &matrix);
glhckSkinBoneOffsetMatrix(skinBone, &transposed);
glhckSkinBoneInsertWeights(skinBone, weights, assimpBone->mNumWeights);
}
/* get transformation matrix */
matrix.mat[0] = boneNd->mTransformation.a1;
matrix.mat[1] = boneNd->mTransformation.a2;
matrix.mat[2] = boneNd->mTransformation.a3;
matrix.mat[3] = boneNd->mTransformation.a4;
matrix.mat[4] = boneNd->mTransformation.b1;
matrix.mat[5] = boneNd->mTransformation.b2;
matrix.mat[6] = boneNd->mTransformation.b3;
matrix.mat[7] = boneNd->mTransformation.b4;
matrix.mat[8] = boneNd->mTransformation.c1;
matrix.mat[9] = boneNd->mTransformation.c2;
matrix.mat[10] = boneNd->mTransformation.c3;
matrix.mat[11] = boneNd->mTransformation.c4;
matrix.mat[12] = boneNd->mTransformation.d1;
matrix.mat[13] = boneNd->mTransformation.d2;
matrix.mat[14] = boneNd->mTransformation.d3;
matrix.mat[15] = boneNd->mTransformation.d4;
/* assimp is row-major, kazmath is column-major */
kmMat4Transpose(&transposed, &matrix);
glhckBoneTransformationMatrix(bone, &transposed);
/* process children bones */
for (i = 0; i != boneNd->mNumChildren; ++i) {
child = processBones(findNode(nd, boneNd->mChildren[i]->mName.data), nd, mesh, bones, skinBones, numBones);
if (child) glhckBoneParentBone(child, bone);
}
return bone;
fail:
IFDO(glhckBoneFree, bone);
IFDO(glhckSkinBoneFree, skinBone);
return RETURN_FAIL;
}
