//! Loads and returns a skinned model from a file.
SkinnedModel* ModelImporter::LoadSkinnedModel(string filename)
{
// Is the model already loaded?
if(mSkinnedModelMap.find(filename) != mSkinnedModelMap.end())
return mSkinnedModelMap[filename];
Assimp::Importer importer;
mFilename = filename;
SkinnedModel* model = NULL;
// Important! Makes sure that if the angle between two face normals is > 80 they are not smoothed together.
// Since the angle between a cubes face normals is 90 the lighting looks very bad if we don't specify this.
importer.SetPropertyFloat(AI_CONFIG_PP_GSN_MAX_SMOOTHING_ANGLE, 80.0f);
importer.SetPropertyInteger(AI_CONFIG_IMPORT_TER_MAKE_UVS, 1);
importer.SetPropertyInteger(AI_CONFIG_PP_SBP_REMOVE, aiPrimitiveType_LINE);
// Load scene from the file.
const aiScene* scene = importer.ReadFile(filename,
aiProcess_CalcTangentSpace |
aiProcess_Triangulate |
aiProcess_GenSmoothNormals |
aiProcess_SplitLargeMeshes |
aiProcess_ConvertToLeftHanded |
aiProcess_SortByPType);
if(scene)
{
// Create the model that is getting filled out.
model = new SkinnedModel();
// Create the animator.
SceneAnimator* animator = new SceneAnimator();
animator->Init(scene);
model->SetAnimator(animator);
// Loop through all meshes.
for(int j = 0; j < scene->mNumMeshes; j++)
{
aiMesh* assimpMesh = scene->mMeshes[j];
// Calculate vertex weight and bone indices.
vector<Weights> weights = CalculateWeights(assimpMesh, animator);
vector<SkinnedVertex> vertices;
vector<UINT> indices;
// Add vertices to the vertex list.
for(int i = 0; i < assimpMesh->mNumVertices; i++)
{
aiVector3D v = assimpMesh->mVertices[i];
aiVector3D n = assimpMesh->mNormals[i];
aiVector3D t = aiVector3D(0, 0, 0);
if(assimpMesh->HasTextureCoords(0))
t = assimpMesh->mTextureCoords[0][i];
n = n.Normalize();
// Pos, normal and texture coordinates.
SkinnedVertex vertex(v.x, v.y, v.z, n.x, n.y, n.z, 0, 0, 1, t.x, t.y);
// Bone indices and weights.
for(int k = 0; k < weights[i].boneIndices.size(); k++)
vertex.BoneIndices[k] = weights[i].boneIndices[k];
vertex.Weights.x = weights[i].weights.size() >= 1 ? weights[i].weights[0] : 0;
vertex.Weights.y = weights[i].weights.size() >= 2 ? weights[i].weights[1] : 0;
vertex.Weights.z = weights[i].weights.size() >= 3 ? weights[i].weights[2] : 0;
vertices.push_back(vertex);
}
// Add indices to the index list.
for(int i = 0; i < assimpMesh->mNumFaces; i++)
for(int k = 0; k < assimpMesh->mFaces[i].mNumIndices; k++)
indices.push_back(assimpMesh->mFaces[i].mIndices[k]);
// Get the path to the texture in the directory.
aiString path;
aiMaterial* material = scene->mMaterials[assimpMesh->mMaterialIndex];
material->Get(AI_MATKEY_TEXTURE_DIFFUSE(0), path);
FindValidPath(&path);
// Extract all the ambient, diffuse and specular colors.
aiColor4D ambient, diffuse, specular;
material->Get(AI_MATKEY_COLOR_AMBIENT, ambient);
material->Get(AI_MATKEY_COLOR_DIFFUSE, diffuse);
material->Get(AI_MATKEY_COLOR_SPECULAR, specular);
// Create the mesh and its primitive.
SkinnedMesh* mesh = new SkinnedMesh();
Primitive* primitive = new Primitive(GlobalApp::GetD3DDevice(), vertices, indices);
mesh->SetPrimitive(primitive);
mesh->SetVertices(vertices);
mesh->SetIndices(indices);
mPrimtiveFactory->AddPrimitive(path.C_Str(), primitive);
// Replace .tga with .bmp [HACK].
string texturePath = path.C_Str();
int tgaPos = texturePath.find_first_of(".tga");
if(tgaPos != string::npos) {
texturePath.replace(texturePath.size()-4, 4, ".bmp");
path = texturePath;
}
// Any texture?
if(_stricmp(path.C_Str(), "") != 0)
mesh->LoadTexture(path.C_Str());
// Any normal map?
aiString nmap;
material->Get(AI_MATKEY_TEXTURE_HEIGHT(0), nmap);
FindValidPath(&nmap);
if(_stricmp(nmap.C_Str(), "") != 0)
mesh->SetNormalMap(GlobalApp::GetGraphics()->LoadTexture(nmap.C_Str()));
// [NOTE] The material is set to white.
mesh->SetMaterial(Material(Colors::White));
//mesh->SetMaterial(Material(diffuse, diffuse, diffuse));
model->SetFilename(filename);
// Add the mesh to the model.
model->AddMesh(mesh);
}
// Pre-calculate the bounding box.
model->CalculateAABB();
// Add the newly created mesh to the map and return it.
mSkinnedModelMap[filename] = model;
return mSkinnedModelMap[filename];
}
else {
char buffer[246];
sprintf(buffer, "Error loading model: %s", filename.c_str());
MessageBox(0, buffer, "Error!", 0);
mSkinnedModelMap[filename] = LoadSkinnedModel("models/box.obj");
return mSkinnedModelMap[filename];
}
}
void
Mesh::bind()
{
Assimp::Importer importer;
unsigned int flags = aiProcess_Triangulate | aiProcess_JoinIdenticalVertices;
if (generateVertexNormals) {
importer.SetPropertyInteger(AI_CONFIG_PP_RVC_FLAGS, aiComponent_NORMALS);
importer.SetPropertyFloat(AI_CONFIG_PP_GSN_MAX_SMOOTHING_ANGLE, 30.0f);
// ignore normals in file and generate per vertex normals
flags |= aiProcess_RemoveComponent | aiProcess_GenSmoothNormals;
} else {
// generate face normals if not already present in the file
flags |= aiProcess_GenNormals;
}
const aiScene* scene = importer.ReadFile(fileName, flags);
if (!scene) {
return;
}
std::vector<float> vertices;
std::vector<float> normals;
std::vector<float> textureCoordinates;
min.x = 1e38;
min.y = 1e38;
min.z = 1e38;
max.x = -1e38;
max.y = -1e38;
max.z = -1e38;
const struct aiNode* nd = scene->mRootNode;
for (unsigned int n = 0; n < nd->mNumMeshes; ++n) {
const struct aiMesh* mesh = scene->mMeshes[nd->mMeshes[n]];
std::cout << "vertices: " << mesh->mNumVertices << ", faces: " << mesh->mNumFaces << std::endl;
for (unsigned int t = 0; t < mesh->mNumFaces; ++t) {
const struct aiFace* face = &mesh->mFaces[t];
switch (face->mNumIndices) {
case 3:
break;
default:
std::cout << "ignored" << std::endl;
continue;
}
for (unsigned int idx= 0;idx < face->mNumIndices;idx++) {
float x = mesh->mVertices[face->mIndices[idx]].x;
float y = mesh->mVertices[face->mIndices[idx]].y;
float z = mesh->mVertices[face->mIndices[idx]].z;
float nx = mesh->mNormals[face->mIndices[idx]].x;
float ny = mesh->mNormals[face->mIndices[idx]].y;
float nz = mesh->mNormals[face->mIndices[idx]].z;
if (x < min.x) {
min.x = x;
}
if (y < min.y) {
min.y = y;
}
if (z < min.z) {
min.z = z;
}
if (x > max.x) {
max.x = x;
}
if (y > max.y) {
max.y = y;
}
if (z > max.z) {
max.z = z;
}
vertices.push_back(x);
vertices.push_back(y);
vertices.push_back(z);
vertices.push_back(1.0f);
normals.push_back(nx);
normals.push_back(ny);
normals.push_back(nz);
normals.push_back(0.0f);
textureCoordinates.push_back(x / 8);
textureCoordinates.push_back(z / 8);
}
}
}
std::cout << "bounding box: min = "
<< min.x << ", " << min.y << ", " << min.z
<< " - max = "
<< max.x << ", " << max.y << ", " << max.z
<< std::endl;
// vertices.clear();
// normals.clear();
// quad(vertices, normals, 0, 1, 2, 3);
// quad(vertices, normals, 0, 4, 5, 1);
// quad(vertices, normals, 1, 5, 6, 2);
// quad(vertices, normals, 2, 6, 7, 3);
// quad(vertices, normals, 3, 7, 4, 0);
// quad(vertices, normals, 4, 7, 6, 5);
count = vertices.size();
glGenBuffers(1, &vertexBuffer);
glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
glBufferData(GL_ARRAY_BUFFER, vertices.size() * sizeof(float), &vertices[0], GL_STATIC_DRAW);
glGenBuffers(1, &normalBuffer);
glBindBuffer(GL_ARRAY_BUFFER, normalBuffer);
glBufferData(GL_ARRAY_BUFFER, normals.size() * sizeof(float), &normals[0], GL_STATIC_DRAW);
glGenBuffers(1, &textureBuffer);
glBindBuffer(GL_ARRAY_BUFFER, textureBuffer);
glBufferData(GL_ARRAY_BUFFER, textureCoordinates.size() * sizeof(float), &textureCoordinates[0], GL_STATIC_DRAW);
}
//! Loads and returns a static model from a file.
StaticModel* ModelImporter::LoadStaticModel(string filename)
{
// Is the model already loaded?
if(mStaticModelMap.find(filename) != mStaticModelMap.end())
return mStaticModelMap[filename];
Assimp::Importer importer;
mFilename = filename;
StaticModel* model = NULL;
// Important! Makes sure that if the angle between two face normals is > 80 they are not smoothed together.
// Since the angle between a cubes face normals is 90 the lighting looks very bad if we don't specify this.
importer.SetPropertyFloat(AI_CONFIG_PP_GSN_MAX_SMOOTHING_ANGLE, 80.0f);
importer.SetPropertyInteger(AI_CONFIG_IMPORT_TER_MAKE_UVS, 1);
importer.SetPropertyInteger(AI_CONFIG_PP_SBP_REMOVE, aiPrimitiveType_LINE);
// Load scene from the file.
const aiScene* scene = importer.ReadFile(filename,
aiProcess_CalcTangentSpace |
aiProcess_Triangulate |
aiProcess_GenSmoothNormals |
aiProcess_SplitLargeMeshes |
aiProcess_ConvertToLeftHanded |
aiProcess_SortByPType);
// Successfully loaded the scene.
if(scene)
{
// Create the model that is getting filled out.
model = new StaticModel();
// Loop through all meshes.
for(int i = 0; i < scene->mNumMeshes; i++)
{
aiMesh* assimpMesh = scene->mMeshes[i];
vector<Vertex> vertices;
vector<UINT> indices;
// Add vertices to the vertex list.
for(int i = 0; i < assimpMesh->mNumVertices; i++)
{
aiVector3D v = assimpMesh->mVertices[i];
aiVector3D n = assimpMesh->mNormals[i];
aiVector3D t = aiVector3D(0, 0, 0);
if(assimpMesh->HasTextureCoords(0))
t = assimpMesh->mTextureCoords[0][i];
n = n.Normalize();
Vertex vertex(v.x, v.y, v.z, n.x, n.y, n.z, 0, 0, 0, t.x, t.y);
vertices.push_back(vertex);
}
// Add indices to the index list.
for(int i = 0; i < assimpMesh->mNumFaces; i++)
for(int j = 0; j < assimpMesh->mFaces[i].mNumIndices; j++)
indices.push_back(assimpMesh->mFaces[i].mIndices[j]);
// Get the path to the texture in the directory.
aiString path;
aiMaterial* material = scene->mMaterials[assimpMesh->mMaterialIndex];
material->Get(AI_MATKEY_TEXTURE_DIFFUSE(0), path);
FindValidPath(&path);
// Extract all the ambient, diffuse and specular colors.
aiColor4D ambient, diffuse, specular;
material->Get(AI_MATKEY_COLOR_AMBIENT, ambient);
material->Get(AI_MATKEY_COLOR_DIFFUSE, diffuse);
material->Get(AI_MATKEY_COLOR_SPECULAR, specular);
// Create the mesh and its primitive.
StaticMesh* mesh = new StaticMesh();
Primitive* primitive = new Primitive(GlobalApp::GetD3DDevice(), vertices, indices);
mesh->SetPrimitive(primitive);
mesh->SetVertices(vertices);
mesh->SetIndices(indices);
mPrimtiveFactory->AddPrimitive(path.C_Str(), primitive);
// Any texture?
if(_stricmp(path.C_Str(), "") != 0)
mesh->LoadTexture(path.C_Str());
// Any normal map?
aiString nmap;
material->Get(AI_MATKEY_TEXTURE_HEIGHT(0), nmap);
FindValidPath(&nmap);
if(_stricmp(nmap.C_Str(), "") != 0)
mesh->SetNormalMap(GlobalApp::GetGraphics()->LoadTexture(nmap.C_Str()));
// [NOTE] The material is set to white.
mesh->SetMaterial(Material(Colors::White)); // Was before [NOTE]
model->SetFilename(filename);
// Add the mesh to the model.
model->AddMesh(mesh);
}
// Add to the model map and return it.
mStaticModelMap[filename] = model;
return mStaticModelMap[filename];
}
else {
char buffer[246];
sprintf(buffer, "Error loading model: %s", filename.c_str());
MessageBox(0, buffer, "Error!", 0);
mStaticModelMap[filename] = LoadStaticModel("models/box.obj");
return mStaticModelMap[filename];
}
}
