I'm struggling to load model via assimp with multiple meshes, here is code for loading model:
bool loadAssImp(
const char * path,
std::vector<unsigned short> & indices,
std::vector<glm::vec3> & vertices,
std::vector<glm::vec2> & uvs,
std::vector<glm::vec3> & normals
) {
Assimp::Importer importer;
const aiScene* scene = importer.ReadFile(path, aiProcess_Triangulate);
if (!scene) {
cout << importer.GetErrorString() << endl;
return false;
}
aiMesh* mesh;
for (unsigned int l = 0; l < scene->mNumMeshes; l++)
{
mesh = scene->mMeshes[l];
cout << l << endl;
// Fill vertices positions
vertices.reserve(mesh->mNumVertices);
for (unsigned int i = 0; i < mesh->mNumVertices; i++) {
aiVector3D pos = mesh->mVertices[i];
vertices.push_back(glm::vec3(pos.x, pos.y, pos.z));
}
// Fill vertices texture coordinates
uvs.reserve(mesh->mNumVertices);
for (unsigned int i = 0; i < mesh->mNumVertices; i++) {
aiVector3D UVW = mesh->mTextureCoords[0][i]; // Assume only 1 set of UV coords; AssImp supports 8 UV sets.
uvs.push_back(glm::vec2(UVW.x, UVW.y));
}
// Fill vertices normals
normals.reserve(mesh->mNumVertices);
for (unsigned int i = 0; i < mesh->mNumVertices; i++) {
aiVector3D n = mesh->mNormals[i];
normals.push_back(glm::vec3(n.x, n.y, n.z));
}
// Fill face indices
indices.reserve(3 * mesh->mNumFaces);
for (unsigned int i = 0; i < mesh->mNumFaces; i++) {
// Assume the model has only triangles.
indices.push_back(mesh->mFaces[i].mIndices[0]);
indices.push_back(mesh->mFaces[i].mIndices[1]);
indices.push_back(mesh->mFaces[i].mIndices[2]);
}
}
// The "scene" pointer will be deleted automatically by "importer"
return true;
}
model I'm trying to load has two meshes, head and torso
if I start loop like this: for (int l = scene->mNumMeshes - 1; l >= 0 ; l--) then it loads model almost correctly, some of the model vertices don't get drawn correctly but head and almost all of torso is drawn.
if I start loop like this: for (unsigned int l = 0; l < scene->mNumMeshes; l++) only torso is drawn (but is drawn fully without any missing parts)
strangely in both ways vertices and index count is the same.
