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Assimp loading of huge meshes full of textures is working

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This commit is contained in:
Hurlu 2019-03-27 15:43:55 +09:00
parent 34d4ba33e2
commit 1ea93fa5e2
2 changed files with 55 additions and 34 deletions
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76
BaseGLProject/Models/Mesh.cpp
View File

@ -29,6 +29,8 @@ Mesh::MeshEntry::MeshEntry(Dataset &set, Mesh *m)
vbo[TEXCOORD_BUFFER] = NULL;
vbo[COLOR_BUFFER] = NULL;
vbo[INDEX_BUFFER] = NULL;
vbo[TANGENTS_BUFFER] = NULL;
vbo[BITTANGENTS_BUFFER] = NULL;
glGenVertexArrays(1, &vao);
glBindVertexArray(vao);
@ -93,7 +95,7 @@ Mesh::MeshEntry::MeshEntry(Dataset &set, Mesh *m)
}
Mesh::MeshEntry::MeshEntry(aiMesh *mesh, const aiScene* scene, Mesh * m, std::string dirname)
Mesh::MeshEntry::MeshEntry(aiMesh *mesh, const aiScene* scene, Mesh * m)
{
renderType = OBJ;
parent = m;
@ -220,6 +222,15 @@ Mesh::MeshEntry::MeshEntry(aiMesh *mesh, const aiScene* scene, Mesh * m, std::st
material->Get(AI_MATKEY_COLOR_DIFFUSE, dcolor);
material->Get(AI_MATKEY_COLOR_AMBIENT, acolor);
material->Get(AI_MATKEY_COLOR_SPECULAR, scolor);
if (material->GetTextureCount(aiTextureType_DIFFUSE) > 0) { //we only care diffuse texture
aiString Path;
if (material->GetTexture(aiTextureType_DIFFUSE, 0, &Path, NULL, NULL, NULL,
NULL, NULL) == AI_SUCCESS) {
std::string FullPath = parent->directory + Path.data; //texture file
textures.push_back(Texture(FullPath));
}
}
}
glBindBuffer(GL_ARRAY_BUFFER, 0);
@ -250,6 +261,14 @@ Mesh::MeshEntry::~MeshEntry() {
glDeleteBuffers(1, &vbo[COLOR_BUFFER]);
}
if (vbo[BITTANGENTS_BUFFER]) {
glDeleteBuffers(1, &vbo[BITTANGENTS_BUFFER]);
}
if (vbo[TANGENTS_BUFFER]) {
glDeleteBuffers(1, &vbo[TANGENTS_BUFFER]);
}
glDeleteVertexArrays(1, &vao);
}
@ -258,6 +277,7 @@ Mesh::MeshEntry::~MeshEntry() {
**/
void Mesh::MeshEntry::render(SceneContext &ctx, Shader *shd) {
textureBinding(shd);
glBindVertexArray(vao);
if (renderType == NO_INDEX)
{
@ -269,9 +289,31 @@ void Mesh::MeshEntry::render(SceneContext &ctx, Shader *shd) {
glGetBufferParameteriv(GL_ELEMENT_ARRAY_BUFFER, GL_BUFFER_SIZE, &size);
glDrawElements(GL_TRIANGLES, size / sizeof(unsigned int), GL_UNSIGNED_INT, NULL);
}
textureUnbinding();
glBindVertexArray(0);
}
void Mesh::MeshEntry::textureBinding(Shader * shd)
{
for (GLuint i = 0; i < textures.size(); i++)
{
glActiveTexture(GL_TEXTURE0 + i);
glBindTexture(GL_TEXTURE_2D, textures[i].tex_ref);
shd->addUniform("tex[" + std::to_string(i) + "]", (int)i);
}
if (textures.size() > 0)
shd->addUniform("TexCount", (int)textures.size());
}
void Mesh::MeshEntry::textureUnbinding()
{
for (GLuint i = 0; i < textures.size(); i++)
{
glActiveTexture(GL_TEXTURE0 + i);
glBindTexture(GL_TEXTURE_2D, 0);
}
}
/**
* Mesh constructor, loads the specified filename if supported by Assimp
**/
@ -281,8 +323,8 @@ Mesh::Mesh(const char *filename, Shader *sh)
std::string fullname;
fullname = std::string("./Models/")+ std::string(filename);
std::string dirname = fullname;
dirname.resize(fullname.find_last_of('/'));
directory = fullname;
directory.resize(fullname.find_last_of('/') + 1);
Assimp::Importer importer; //aiProcessPreset_TargetRealtime_Fast
const aiScene* scene = importer.ReadFile(fullname.c_str(),
@ -296,34 +338,8 @@ Mesh::Mesh(const char *filename, Shader *sh)
return;
}
for (unsigned int i = 0; i < scene->mNumMaterials; i++) {
const aiMaterial* pMaterial = scene->mMaterials[i];
if (pMaterial->GetTextureCount(aiTextureType_DIFFUSE) > 0) { //we only care diffuse texture
aiString Path;
if (pMaterial->GetTexture(aiTextureType_DIFFUSE, 0, &Path, NULL, NULL, NULL,
NULL, NULL) == AI_SUCCESS) {
std::string FullPath = dirname + "/" + Path.data; //texture file
aiColor3D diffuse;
aiColor3D specular;
aiColor3D ambient;
pMaterial->Get(AI_MATKEY_COLOR_DIFFUSE, diffuse);
pMaterial->Get(AI_MATKEY_COLOR_SPECULAR, specular);
pMaterial->Get(AI_MATKEY_COLOR_AMBIENT, ambient);
textures.push_back(Texture(FullPath));
textures.back().mat.enabled = true;
textures.back().mat.ka = glm::vec3(ambient.r, ambient.g, ambient.b);
textures.back().mat.kd = glm::vec3(diffuse.r, diffuse.g, diffuse.b);
textures.back().mat.ks = glm::vec3(specular.r, specular.g, specular.b);
}
}
}
for (unsigned int i = 0; i < scene->mNumMeshes; ++i) {
meshEntries.push_back(new Mesh::MeshEntry(scene->mMeshes[i], scene, this, dirname));
meshEntries.push_back(new Mesh::MeshEntry(scene->mMeshes[i], scene, this));
}
}

13
BaseGLProject/Models/Mesh.h
View File

@ -52,20 +52,25 @@ public:
glm::vec3 ssbo_data[3];
aiColor3D dcolor;
aiColor3D acolor;
aiColor3D scolor;
aiColor3D scolor;
std::vector<Texture> textures;
float shininessStrength;
MeshEntry(aiMesh *mesh, const aiScene* scene, Mesh * m, std::string dirname);
MeshEntry(aiMesh *mesh, const aiScene* scene, Mesh * m);
MeshEntry(Dataset &set, Mesh *m);
~MeshEntry();
Mesh * parent;
void render(SceneContext &ctx, Shader *shd);
void render(SceneContext &ctx, Shader *shd);
private:
void textureBinding(Shader *shd);
void textureUnbinding();
};
public:
Mesh(const char *filename, Shader *sh);
Mesh(Dataset &dataset, Shader *sh);
~Mesh(void);
std::string directory;
std::vector<MeshEntry*> meshEntries;
std::vector<Texture> textures;
@ -74,8 +79,8 @@ private:
void enableCulling();
void textureBinding(Shader *shd);
void disableCulling();
void textureUnbinding();
void disableCulling();
public:
Model model;
CullFace cullMode = NONE;