- Codice:
void recursive_render(const struct aiScene* sc, const struct aiNode* nd, float scale){
unsigned int i;
unsigned int n = 0, t;
aiMatrix4x4 m = nd->mTransformation;
aiMatrix4x4 m2;
aiMatrix4x4::Scaling(aiVector3D(scale, scale, scale), m2);
m = m * m2;
m.Transpose();
float aux[16];
memcpy(aux, &m, sizeof(float) * 16);
for (; n < nd->mNumMeshes; ++n)
{
const struct aiMesh* mesh = scene->mMeshes[nd->mMeshes[n]];
glGenVertexArrays(1, &VAO3);
glBindVertexArray(VAO3);
glDrawElements(GL_TRIANGLES, mesh->mNumFaces * 3, GL_UNSIGNED_INT, 0);
}
// draw all children
for (n = 0; n < nd->mNumChildren; ++n)
recursive_render(sc, nd->mChildren[n], scale);
//glPopMatrix();
}
Codice per generare i vertex array objects
- Codice:
void genVAOsAndUniformBuffer(const aiScene* sc, const struct aiNode* nd, float scale) {
unsigned int i;
unsigned int n = 0, t;
for (; n < nd->mNumMeshes; ++n)
{
const struct aiMesh* mesh = scene->mMeshes[nd->mMeshes[n]];
unsigned int* faceArray;
faceArray = (unsigned int*)malloc(sizeof(unsigned int) * mesh->mNumFaces * 3);
unsigned int faceIndex = 0;
for (unsigned int t = 0; t < mesh->mNumFaces; ++t) {
const aiFace* face = &mesh->mFaces[t];
memcpy(&faceArray[faceIndex], face->mIndices, 3 * sizeof(unsigned int));
faceIndex += 3;
}
glGenVertexArrays(1, &VAO3);
glBindVertexArray(VAO3);
// buffer for faces
glGenBuffers(1, &VBO3);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, VBO3);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(mesh->mNumFaces) * 3, faceArray, GL_STATIC_DRAW);
// buffer for vertex positions
if (mesh->HasPositions()) {
glGenBuffers(1, &VBO3);
glBindBuffer(GL_ARRAY_BUFFER, VBO3);
glBufferData(GL_ARRAY_BUFFER, sizeof(mesh->mNumVertices) * 3, mesh->mVertices, GL_STATIC_DRAW);
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 3, GL_FLOAT, 0, 0, 0);
}
if (mesh->HasNormals()) {
glGenBuffers(1, &VBO3);
glBindBuffer(GL_ARRAY_BUFFER, VBO3);
glBufferData(GL_ARRAY_BUFFER, sizeof(mesh->mNumVertices) * 3, mesh->mNormals, GL_STATIC_DRAW);
glEnableVertexAttribArray(1);
glVertexAttribPointer(1, 3, GL_FLOAT, 0, 0, 0);
}
}
}
Codice per importare il modello 3d da file.
- Codice:
bool Import3DFromFile(const std::string& pFile)
{
// Check if file exists
std::ifstream fin(pFile.c_str());
if (!fin.fail())
{
fin.close();
}
else
{
std::cout << "Couldn't open file: " << pFile.c_str() << std::endl;
//logInfo(importer.GetErrorString());
return false;
}
scene = importer.ReadFile(pFile, aiProcessPreset_TargetRealtime_Quality);
// If the import failed, report it
if (!scene)
{
std::cout << "Import of scene 5" << pFile << " succeeded." << std::endl;
//logInfo(importer.GetErrorString());
return false;
}
// Now we can access the file's contents.
std::cout << "Import of scene " << pFile << " succeeded." << std::endl;
// We're done. Everything will be cleaned up by the importer destructor
return true;
}
I modelli 3d che utilizzo hanno estensione .3ds e .dae. Non riesco a capire dove siano gli errori. Avete qualche suggerimento?
