void Model::loadRecursive(MeshPart& part, bool invert,
std::vector<float>& vertex_data, const aiScene* scene, const aiNode* node) {
//update transform matrix. notice that we also transpose it
aiMatrix4x4 m = node->mTransformation;
for (int j=0; j<4; ++j)
for (int i=0; i<4; ++i)
part.transform[j][i] = m[i][j];
// draw all meshes assigned to this node
for (unsigned int n=0; n < node->mNumMeshes; ++n) {
const struct aiMesh* mesh = scene->mMeshes[node->mMeshes[n]];
//apply_material(scene->mMaterials[mesh->mMaterialIndex]);
part.first = vertex_data.size()/6;
part.count = mesh->mNumFaces*6;
//Allocate data
vertex_data.reserve(vertex_data.size() + part.count*6);
//Add the vertices from file
for (unsigned int t = 0; t < mesh->mNumFaces; ++t) {
const struct aiFace* face = &mesh->mFaces[t];
if(face->mNumIndices != 3)
THROW_EXCEPTION("Only triangle meshes are supported");
for(unsigned int i = 0; i < face->mNumIndices; i++) {
int index = face->mIndices[i];
//get Vertexes
vertex_data.push_back(mesh->mVertices[index].x);
vertex_data.push_back(mesh->mVertices[index].y);
vertex_data.push_back(mesh->mVertices[index].z);
//get Normals
if (mesh->HasNormals()){
vertex_data.push_back(mesh->mNormals[index].x);
vertex_data.push_back(mesh->mNormals[index].y);
vertex_data.push_back(mesh->mNormals[index].z);
}
}
}
}
// load all children
for (unsigned int n = 0; n < node->mNumChildren; ++n) {
part.children.push_back(MeshPart());
loadRecursive(part.children.back(), invert, vertex_data, scene, node->mChildren[n]);
}
}
void Model::loadRecursive(MeshPart& part, bool invert,
std::vector<unsigned int>& indices, std::vector<Vertex>& vertex_data, const aiScene* scene, const aiNode* node) {
std::cout << "loading one part" << std::endl;
//update transform matrix. notice that we also transpose it
aiMatrix4x4 m = node->mTransformation;
for (int j=0; j<4; ++j)
for (int i=0; i<4; ++i)
part.transform[j][i] = m[i][j];
// draw all meshes assigned to this node
for (unsigned int n=0; n < node->mNumMeshes; ++n) {
std::cout << "\tloading mesh part " << n << std::endl;
const struct aiMesh* mesh = scene->mMeshes[node->mMeshes[n]];
//apply_material(scene->mMaterials[mesh->mMaterialIndex]);
applyMateriale(scene->mMaterials[mesh->mMaterialIndex], part.materiale);
part.first = indices.size();
part.count = mesh->mNumFaces * 3;
//Allocate data
indices.reserve(part.first + part.count);
vertex_data.reserve(vertex_data.size() + mesh->mNumVertices);
for (unsigned int t = 0; t < mesh->mNumFaces; ++t) {
const struct aiFace* face = &mesh->mFaces[t];
if(face->mNumIndices != 3)
THROW_EXCEPTION("Only triangle meshes are supported");
for(unsigned int i = 0; i < face->mNumIndices; i++) {
int index = face->mIndices[i];
indices.push_back(vertex_data.size() + index);
}
}
for(unsigned int t = 0; t < mesh->mNumVertices; ++t){
Vertex v;
unsigned int index = t;
// set vertex position
v.position = glm::vec3(mesh->mVertices[index].x, mesh->mVertices[index].y, mesh->mVertices[index].z);
// compute bounding box
max_dim.x = v.position.x < max_dim.x ? max_dim.x : v.position.x;
max_dim.y = v.position.y < max_dim.y ? max_dim.y : v.position.y;
max_dim.z = v.position.z < max_dim.z ? max_dim.z : v.position.z;
min_dim.x = v.position.x > min_dim.x ? min_dim.x : v.position.x;
min_dim.y = v.position.y > min_dim.y ? min_dim.y : v.position.y;
min_dim.z = v.position.z > min_dim.z ? min_dim.z : v.position.z;
// get normal
if(mesh->HasNormals())
v.normal = glm::vec3(mesh->mNormals[index].x, mesh->mNormals[index].y, mesh->mNormals[index].z);
// get uv coord
if(mesh->HasTextureCoords(0))
v.texCoord = glm::vec2(mesh->mTextureCoords[0][index].x, mesh->mTextureCoords[0][index].y);
vertex_data.push_back(v);
}
}
// load all children
for (unsigned int n = 0; n < node->mNumChildren; ++n) {
part.children.push_back(MeshPart());
loadRecursive(part.children.back(), invert, indices, vertex_data, scene, node->mChildren[n]);
}
}
shared_ptr<Model> MakeBoxModel(Renderer* renderer, const BoxModelDesc& desc)
{
auto model = make_shared<Model>();
auto vbuffer = make_shared<VertexBuffer>();
shared_ptr<BaseVertexBufferData> vdata;
if (desc.genNormals && desc.genColors)
{
vdata.reset(new VertexBufferData<VertexPositionNormalColor>(
{
// -X face
{ XMFLOAT3(-0.5f * desc.sizeX, -0.5f * desc.sizeY, -0.5f * desc.sizeZ), XMFLOAT3(-1.0f, 0.0f, 0.0f), XMFLOAT3(desc.colors[1]) },
{ XMFLOAT3(-0.5f * desc.sizeX, 0.5f * desc.sizeY, -0.5f * desc.sizeZ), XMFLOAT3(-1.0f, 0.0f, 0.0f), XMFLOAT3(desc.colors[0]) },
{ XMFLOAT3(-0.5f * desc.sizeX, -0.5f * desc.sizeY, 0.5f * desc.sizeZ), XMFLOAT3(-1.0f, 0.0f, 0.0f), XMFLOAT3(desc.colors[7]) },
{ XMFLOAT3(-0.5f * desc.sizeX, 0.5f * desc.sizeY, 0.5f * desc.sizeZ), XMFLOAT3(-1.0f, 0.0f, 0.0f), XMFLOAT3(desc.colors[6]) },
// +X face
{ XMFLOAT3(0.5f * desc.sizeX, -0.5f * desc.sizeY, 0.5f * desc.sizeZ), XMFLOAT3(1.0f, 0.0f, 0.0f), XMFLOAT3(desc.colors[5]) },
{ XMFLOAT3(0.5f * desc.sizeX, 0.5f * desc.sizeY, 0.5f * desc.sizeZ), XMFLOAT3(1.0f, 0.0f, 0.0f), XMFLOAT3(desc.colors[4]) },
{ XMFLOAT3(0.5f * desc.sizeX, -0.5f * desc.sizeY, -0.5f * desc.sizeZ), XMFLOAT3(1.0f, 0.0f, 0.0f), XMFLOAT3(desc.colors[3]) },
{ XMFLOAT3(0.5f * desc.sizeX, 0.5f * desc.sizeY, -0.5f * desc.sizeZ), XMFLOAT3(1.0f, 0.0f, 0.0f), XMFLOAT3(desc.colors[2]) },
// -Y face
{ XMFLOAT3(-0.5f * desc.sizeX, -0.5f * desc.sizeY, -0.5f * desc.sizeZ), XMFLOAT3(0.0f, -1.0f, 0.0f), XMFLOAT3(desc.colors[1]) },
{ XMFLOAT3(-0.5f * desc.sizeX, -0.5f * desc.sizeY, 0.5f * desc.sizeZ), XMFLOAT3(0.0f, -1.0f, 0.0f), XMFLOAT3(desc.colors[7]) },
{ XMFLOAT3(0.5f * desc.sizeX, -0.5f * desc.sizeY, -0.5f * desc.sizeZ), XMFLOAT3(0.0f, -1.0f, 0.0f), XMFLOAT3(desc.colors[3]) },
{ XMFLOAT3(0.5f * desc.sizeX, -0.5f * desc.sizeY, 0.5f * desc.sizeZ), XMFLOAT3(0.0f, -1.0f, 0.0f), XMFLOAT3(desc.colors[5]) },
// +Y face
{ XMFLOAT3(0.5f * desc.sizeX, 0.5f * desc.sizeY, -0.5f * desc.sizeZ), XMFLOAT3(0.0f, 1.0f, 0.0f), XMFLOAT3(desc.colors[2]) },
{ XMFLOAT3(0.5f * desc.sizeX, 0.5f * desc.sizeY, 0.5f * desc.sizeZ), XMFLOAT3(0.0f, 1.0f, 0.0f), XMFLOAT3(desc.colors[4]) },
{ XMFLOAT3(-0.5f * desc.sizeX, 0.5f * desc.sizeY, -0.5f * desc.sizeZ), XMFLOAT3(0.0f, 1.0f, 0.0f), XMFLOAT3(desc.colors[0]) },
{ XMFLOAT3(-0.5f * desc.sizeX, 0.5f * desc.sizeY, 0.5f * desc.sizeZ), XMFLOAT3(0.0f, 1.0f, 0.0f), XMFLOAT3(desc.colors[6]) },
// -Z face
{ XMFLOAT3(0.5f * desc.sizeX, -0.5f * desc.sizeY, -0.5f * desc.sizeZ), XMFLOAT3(0.0f, 0.0f, -1.0f), XMFLOAT3(desc.colors[3]) },
{ XMFLOAT3(0.5f * desc.sizeX, 0.5f * desc.sizeY, -0.5f * desc.sizeZ), XMFLOAT3(0.0f, 0.0f, -1.0f), XMFLOAT3(desc.colors[2]) },
{ XMFLOAT3(-0.5f * desc.sizeX, -0.5f * desc.sizeY, -0.5f * desc.sizeZ), XMFLOAT3(0.0f, 0.0f, -1.0f), XMFLOAT3(desc.colors[1]) },
{ XMFLOAT3(-0.5f * desc.sizeX, 0.5f * desc.sizeY, -0.5f * desc.sizeZ), XMFLOAT3(0.0f, 0.0f, -1.0f), XMFLOAT3(desc.colors[0]) },
// +Z face
{ XMFLOAT3(-0.5f * desc.sizeX, -0.5f * desc.sizeY, 0.5f * desc.sizeZ), XMFLOAT3(0.0f, 0.0f, 1.0f), XMFLOAT3(desc.colors[7]) },
{ XMFLOAT3(-0.5f * desc.sizeX, 0.5f * desc.sizeY, 0.5f * desc.sizeZ), XMFLOAT3(0.0f, 0.0f, 1.0f), XMFLOAT3(desc.colors[6]) },
{ XMFLOAT3(0.5f * desc.sizeX, -0.5f * desc.sizeY, 0.5f * desc.sizeZ), XMFLOAT3(0.0f, 0.0f, 1.0f), XMFLOAT3(desc.colors[5]) },
{ XMFLOAT3(0.5f * desc.sizeX, 0.5f * desc.sizeY, 0.5f * desc.sizeZ), XMFLOAT3(0.0f, 0.0f, 1.0f), XMFLOAT3(desc.colors[4]) }
}
));
vbuffer->Create(vdata, Usage::Immutable, "Box vertex buffer with normals and colors");
}
else if (desc.genNormals)
{
vdata.reset(new VertexBufferData<VertexPositionNormal>(
{
// -X face
{ XMFLOAT3(-0.5f * desc.sizeX, -0.5f * desc.sizeY, -0.5f * desc.sizeZ), XMFLOAT3(-1.0f, 0.0f, 0.0f) },
{ XMFLOAT3(-0.5f * desc.sizeX, 0.5f * desc.sizeY, -0.5f * desc.sizeZ), XMFLOAT3(-1.0f, 0.0f, 0.0f) },
{ XMFLOAT3(-0.5f * desc.sizeX, -0.5f * desc.sizeY, 0.5f * desc.sizeZ), XMFLOAT3(-1.0f, 0.0f, 0.0f) },
{ XMFLOAT3(-0.5f * desc.sizeX, 0.5f * desc.sizeY, 0.5f * desc.sizeZ), XMFLOAT3(-1.0f, 0.0f, 0.0f) },
// +X face
{ XMFLOAT3(0.5f * desc.sizeX, -0.5f * desc.sizeY, 0.5f * desc.sizeZ), XMFLOAT3(1.0f, 0.0f, 0.0f) },
{ XMFLOAT3(0.5f * desc.sizeX, 0.5f * desc.sizeY, 0.5f * desc.sizeZ), XMFLOAT3(1.0f, 0.0f, 0.0f) },
{ XMFLOAT3(0.5f * desc.sizeX, -0.5f * desc.sizeY, -0.5f * desc.sizeZ), XMFLOAT3(1.0f, 0.0f, 0.0f) },
{ XMFLOAT3(0.5f * desc.sizeX, 0.5f * desc.sizeY, -0.5f * desc.sizeZ), XMFLOAT3(1.0f, 0.0f, 0.0f) },
// -Y face
{ XMFLOAT3(-0.5f * desc.sizeX, -0.5f * desc.sizeY, -0.5f * desc.sizeZ), XMFLOAT3(0.0f, -1.0f, 0.0f) },
{ XMFLOAT3(-0.5f * desc.sizeX, -0.5f * desc.sizeY, 0.5f * desc.sizeZ), XMFLOAT3(0.0f, -1.0f, 0.0f) },
{ XMFLOAT3(0.5f * desc.sizeX, -0.5f * desc.sizeY, -0.5f * desc.sizeZ), XMFLOAT3(0.0f, -1.0f, 0.0f) },
{ XMFLOAT3(0.5f * desc.sizeX, -0.5f * desc.sizeY, 0.5f * desc.sizeZ), XMFLOAT3(0.0f, -1.0f, 0.0f) },
// +Y face
{ XMFLOAT3(0.5f * desc.sizeX, 0.5f * desc.sizeY, -0.5f * desc.sizeZ), XMFLOAT3(0.0f, 1.0f, 0.0f) },
{ XMFLOAT3(0.5f * desc.sizeX, 0.5f * desc.sizeY, 0.5f * desc.sizeZ), XMFLOAT3(0.0f, 1.0f, 0.0f) },
{ XMFLOAT3(-0.5f * desc.sizeX, 0.5f * desc.sizeY, -0.5f * desc.sizeZ), XMFLOAT3(0.0f, 1.0f, 0.0f) },
{ XMFLOAT3(-0.5f * desc.sizeX, 0.5f * desc.sizeY, 0.5f * desc.sizeZ), XMFLOAT3(0.0f, 1.0f, 0.0f) },
// -Z face
{ XMFLOAT3(0.5f * desc.sizeX, -0.5f * desc.sizeY, -0.5f * desc.sizeZ), XMFLOAT3(0.0f, 0.0f, -1.0f) },
{ XMFLOAT3(0.5f * desc.sizeX, 0.5f * desc.sizeY, -0.5f * desc.sizeZ), XMFLOAT3(0.0f, 0.0f, -1.0f) },
{ XMFLOAT3(-0.5f * desc.sizeX, -0.5f * desc.sizeY, -0.5f * desc.sizeZ), XMFLOAT3(0.0f, 0.0f, -1.0f) },
{ XMFLOAT3(-0.5f * desc.sizeX, 0.5f * desc.sizeY, -0.5f * desc.sizeZ), XMFLOAT3(0.0f, 0.0f, -1.0f) },
// +Z face
{ XMFLOAT3(-0.5f * desc.sizeX, -0.5f * desc.sizeY, 0.5f * desc.sizeZ), XMFLOAT3(0.0f, 0.0f, 1.0f) },
{ XMFLOAT3(-0.5f * desc.sizeX, 0.5f * desc.sizeY, 0.5f * desc.sizeZ), XMFLOAT3(0.0f, 0.0f, 1.0f) },
{ XMFLOAT3(0.5f * desc.sizeX, -0.5f * desc.sizeY, 0.5f * desc.sizeZ), XMFLOAT3(0.0f, 0.0f, 1.0f) },
{ XMFLOAT3(0.5f * desc.sizeX, 0.5f * desc.sizeY, 0.5f * desc.sizeZ), XMFLOAT3(0.0f, 0.0f, 1.0f) }
}
));
vbuffer->Create(vdata, Usage::Immutable, "Box vertex buffer with normals");
}
else if (desc.genColors)
{
vdata.reset(new VertexBufferData<VertexPositionColor>(
{
{ XMFLOAT3(-0.5f * desc.sizeX, 0.5f * desc.sizeY, -0.5f * desc.sizeZ), XMFLOAT3(desc.colors[0]) },
{ XMFLOAT3(-0.5f * desc.sizeX, -0.5f * desc.sizeY, -0.5f * desc.sizeZ), XMFLOAT3(desc.colors[1]) },
{ XMFLOAT3(0.5f * desc.sizeX, 0.5f * desc.sizeY, -0.5f * desc.sizeZ), XMFLOAT3(desc.colors[2]) },
{ XMFLOAT3(0.5f * desc.sizeX, -0.5f * desc.sizeY, -0.5f * desc.sizeZ), XMFLOAT3(desc.colors[3]) },
{ XMFLOAT3(0.5f * desc.sizeX, 0.5f * desc.sizeY, 0.5f * desc.sizeZ), XMFLOAT3(desc.colors[4]) },
{ XMFLOAT3(0.5f * desc.sizeX, -0.5f * desc.sizeY, 0.5f * desc.sizeZ), XMFLOAT3(desc.colors[5]) },
{ XMFLOAT3(-0.5f * desc.sizeX, 0.5f * desc.sizeY, 0.5f * desc.sizeZ), XMFLOAT3(desc.colors[6]) },
{ XMFLOAT3(-0.5f * desc.sizeX, -0.5f * desc.sizeY, 0.5f * desc.sizeZ), XMFLOAT3(desc.colors[7]) }
}
));
vbuffer->Create(vdata, Usage::Immutable, "Box vertex buffer with colors");
}
else
{
vdata.reset(new VertexBufferData<VertexPosition>(
{
{ XMFLOAT3(-0.5f * desc.sizeX, 0.5f * desc.sizeY, -0.5f * desc.sizeZ) },
{ XMFLOAT3(-0.5f * desc.sizeX, -0.5f * desc.sizeY, -0.5f * desc.sizeZ) },
{ XMFLOAT3(0.5f * desc.sizeX, 0.5f * desc.sizeY, -0.5f * desc.sizeZ) },
{ XMFLOAT3(0.5f * desc.sizeX, -0.5f * desc.sizeY, -0.5f * desc.sizeZ) },
{ XMFLOAT3(0.5f * desc.sizeX, 0.5f * desc.sizeY, 0.5f * desc.sizeZ) },
{ XMFLOAT3(0.5f * desc.sizeX, -0.5f * desc.sizeY, 0.5f * desc.sizeZ) },
{ XMFLOAT3(-0.5f * desc.sizeX, 0.5f * desc.sizeY, 0.5f * desc.sizeZ) },
{ XMFLOAT3(-0.5f * desc.sizeX, -0.5f * desc.sizeY, 0.5f * desc.sizeZ) }
}
));
vbuffer->Create(vdata, Usage::Immutable, "Box vertex buffer");
}
// Create the mesh and mesh parts
Mesh mesh;
vector<MeshPart> meshParts;
if (desc.genNormals)
{
meshParts.reserve(6);
// -X face
{
auto ibuffer = make_shared<IndexBuffer>();
shared_ptr<BaseIndexBufferData> idata;
idata.reset(new IndexBufferData16({ 0, 1, 2, 3 }));
ibuffer->Create(idata, Usage::Immutable, "-X face");
auto meshPart = MeshPart(vbuffer, ibuffer, PrimitiveTopology::TriangleStrip, 4, 0, 0);
meshParts.emplace_back(meshPart);
}
// +X face
{
auto ibuffer = make_shared<IndexBuffer>();
shared_ptr<BaseIndexBufferData> idata;
idata.reset(new IndexBufferData16({ 4, 5, 6, 7 }));
ibuffer->Create(idata, Usage::Immutable, "+X face");
auto meshPart = MeshPart(vbuffer, ibuffer, PrimitiveTopology::TriangleStrip, 4, 0, 0);
meshParts.emplace_back(meshPart);
}
// -Y face
{
auto ibuffer = make_shared<IndexBuffer>();
shared_ptr<BaseIndexBufferData> idata;
idata.reset(new IndexBufferData16({ 8, 9, 10, 11 }));
ibuffer->Create(idata, Usage::Immutable, "-Y face");
auto meshPart = MeshPart(vbuffer, ibuffer, PrimitiveTopology::TriangleStrip, 4, 0, 0);
meshParts.emplace_back(meshPart);
}
// +Y face
{
auto ibuffer = make_shared<IndexBuffer>();
shared_ptr<BaseIndexBufferData> idata;
idata.reset(new IndexBufferData16({ 12, 13, 14, 15 }));
ibuffer->Create(idata, Usage::Immutable, "+Y face");
auto meshPart = MeshPart(vbuffer, ibuffer, PrimitiveTopology::TriangleStrip, 4, 0, 0);
meshParts.emplace_back(meshPart);
}
// -Z face
{
auto ibuffer = make_shared<IndexBuffer>();
shared_ptr<BaseIndexBufferData> idata;
idata.reset(new IndexBufferData16({ 16, 17, 18, 19 }));
ibuffer->Create(idata, Usage::Immutable, "-Z face");
auto meshPart = MeshPart(vbuffer, ibuffer, PrimitiveTopology::TriangleStrip, 4, 0, 0);
meshParts.emplace_back(meshPart);
}
// +Z face
{
auto ibuffer = make_shared<IndexBuffer>();
shared_ptr<BaseIndexBufferData> idata;
idata.reset(new IndexBufferData16({ 20, 21, 22, 23 }));
ibuffer->Create(idata, Usage::Immutable, "+Z face");
auto meshPart = MeshPart(vbuffer, ibuffer, PrimitiveTopology::TriangleStrip, 4, 0, 0);
meshParts.emplace_back(meshPart);
}
}
else
{
meshParts.reserve(3);
// Body
{
auto ibuffer = make_shared<IndexBuffer>();
shared_ptr<BaseIndexBufferData> idata;
idata.reset(new IndexBufferData16({ 0, 1, 2, 3, 4, 5, 6, 7, 0, 1 }));
ibuffer->Create(idata, Usage::Immutable, "Body");
auto meshPart = MeshPart(vbuffer, ibuffer, PrimitiveTopology::TriangleStrip, 10, 0, 0);
meshParts.emplace_back(meshPart);
}
// Top
{
auto ibuffer = make_shared<IndexBuffer>();
shared_ptr<BaseIndexBufferData> idata;
idata.reset(new IndexBufferData16({ 6, 0, 4, 2 }));
ibuffer->Create(idata, Usage::Immutable, "Top");
auto meshPart = MeshPart(vbuffer, ibuffer, PrimitiveTopology::TriangleStrip, 4, 0, 0);
meshParts.emplace_back(meshPart);
}
// Bottom
{
auto ibuffer = make_shared<IndexBuffer>();
shared_ptr<BaseIndexBufferData> idata;
idata.reset(new IndexBufferData16({ 5, 3, 7, 1 }));
ibuffer->Create(idata, Usage::Immutable, "Bottom");
auto meshPart = MeshPart(vbuffer, ibuffer, PrimitiveTopology::TriangleStrip, 4, 0, 0);
meshParts.emplace_back(meshPart);
}
}
mesh.SetMeshParts(meshParts);
model->SetSingleMesh(mesh);
return model;
}
