bool Animated_Mesh::Load_Assimp(const std::string& file){
const aiScene* load =aiImportFile(file.c_str(), aiProcessPreset_TargetRealtime_MaxQuality | aiProcess_ConvertToLeftHanded );
if(load==NULL) {
OUTPUT_DEBUG_MSG("Could not load the Model in Animated_Mesh::Load_MyFormat file: '" + file+"'");
return false;
}
size_t numverts(0), currentvertex(0), currentindex(0), numindices(0);
bool hasbones=false;
// go through the mesh counting all the verts and indices that I will need
for (unsigned int i = 0; i < load->mNumMeshes;++i) {
numverts+=load->mMeshes[i]->mNumVertices;
numindices+=load->mMeshes[i]->mNumFaces*3;
if(load->mMeshes[i]->HasBones()) hasbones=true;
}
if(!hasbones) {
aiReleaseImport(load);// free the resrouces
OUTPUT_DEBUG_MSG("Could not load the Model in Animated_Mesh::Load_MyFormat file: '" + file+"', there were no bones deteected.");
return false;
}
IB.Stride=2;
if(numverts >= 65536) IB.Stride=4;
Vertices.resize(numverts);
Indices.resize((IB.Stride/2)*numindices);
std::vector<Vertex_Types::Pos_Tex_Norm_Tang_Bone_Weight> tempverts(numverts);
std::vector<std::string> bonenames;
for (unsigned int i = 0; i < load->mNumMeshes;++i){
Graphics::Texture diffuse, normal;
const aiMesh* mesh = load->mMeshes[i];
if(mesh->mPrimitiveTypes != aiPrimitiveType_TRIANGLE) {
OUTPUT_DEBUG_MSG("There are errors with this submesh, named: "<<mesh->mName.data<<" Please, fix it");
if(mesh->mPrimitiveTypes == aiPrimitiveType_LINE){
OUTPUT_DEBUG_MSG("Problem: The mesh containes lines when it should only contain triangles");
}else {
OUTPUT_DEBUG_MSG("Problem: The mesh containes points when it should only contain triangles");
}
continue;
}
if (!mesh->HasTextureCoords(0)) {
OUTPUT_DEBUG_MSG("There are errors with this submesh, named: "<<mesh->mName.data<<" Please, fix it");
OUTPUT_DEBUG_MSG("Problem: The mesh containes no texcoords, which means there will just be color displayed. This engine does not support color mesh displays, only textured mesh!");
continue;
}
if(!mesh->HasTangentsAndBitangents()) {
OUTPUT_DEBUG_MSG("There are errors with this submesh, named: "<<mesh->mName.data<<" Please, fix it");
OUTPUT_DEBUG_MSG("Problem: Tangents were not created. No known fix");
continue;
}
OUTPUT_DEBUG_MSG("Loading "<<mesh->mNumBones<<" bones . . .");
for( unsigned int a = 0; a < mesh->mNumBones; a++) {
const aiBone* bone = mesh->mBones[a];
size_t bonein(-1);
for(size_t ib(0); ib< bonenames.size(); ib++){
std::string tname = bone->mName.data;
if(tname == bonenames[ib]){// found the bone.. break
bonein=ib;
break;
}
}
if(bonein ==-1){// did not find the bone, this is a new one push back
bonein = bonenames.size();// get the index before insertion
bonenames.push_back(bone->mName.data);
}
// there should only be 4 per vertex here because assimp guaranteees it, but if there are more, we are ok
for( unsigned int b = 0; b < bone->mNumWeights; b++){
if( tempverts[bone->mWeights[b].mVertexId+ currentvertex].Weights.x <= 0.f) {
tempverts[bone->mWeights[b].mVertexId+ currentvertex].Bones[0] = static_cast<float>(bonein);
tempverts[bone->mWeights[b].mVertexId+ currentvertex].Weights.x = bone->mWeights[b].mWeight;
} else if( tempverts[bone->mWeights[b].mVertexId+ currentvertex].Weights.y <= 0.f){
tempverts[bone->mWeights[b].mVertexId+ currentvertex].Bones[1] = static_cast<float>(bonein);
tempverts[bone->mWeights[b].mVertexId+ currentvertex].Weights.y = bone->mWeights[b].mWeight;
} else if( tempverts[bone->mWeights[b].mVertexId+ currentvertex].Weights.z <= 0.f){
tempverts[bone->mWeights[b].mVertexId+ currentvertex].Bones[2] = static_cast<float>(bonein);
tempverts[bone->mWeights[b].mVertexId+ currentvertex].Weights.z = bone->mWeights[b].mWeight;
} else if( tempverts[bone->mWeights[b].mVertexId+ currentvertex].Weights.w <= 0.f){
tempverts[bone->mWeights[b].mVertexId+ currentvertex].Bones[3] = static_cast<float>(bonein);
tempverts[bone->mWeights[b].mVertexId+ currentvertex].Weights.w = bone->mWeights[b].mWeight;
}
}
}
for (unsigned int x = 0; x < mesh->mNumVertices;++x){
Vertices[x + currentvertex] = tempverts[x + currentvertex].Pos = *reinterpret_cast<vec3*>(&mesh->mVertices[x]);
tempverts[x + currentvertex].Tex = *reinterpret_cast<vec2*>(&mesh->mTextureCoords[0][x]);
tempverts[x + currentvertex].Norm = *reinterpret_cast<vec3*>(&mesh->mNormals[x]);
tempverts[x + currentvertex].Tang = *reinterpret_cast<vec3*>(&mesh->mTangents[x]);
}
// check whether we can use 16 bit indices for our format... the ASSIMPOBLARBLA uses 32 bit indices for all theirs..
if (IB.Stride == 4){
uint32_t* pbData = reinterpret_cast<uint32_t*>(&Indices[currentindex]);
for (unsigned int x = 0; x < mesh->mNumFaces;++x){
for (unsigned int a = 0; a < 3 ;++a) {
*pbData++ = static_cast<uint32_t>(mesh->mFaces[x].mIndices[a]+ currentvertex);
}
}
} else {
uint16_t* pbData = reinterpret_cast<uint16_t*>(&Indices[currentindex]);
for (unsigned int x = 0; x < mesh->mNumFaces;++x){
for (unsigned int a = 0; a < 3 ;++a) {
*pbData++ = static_cast<uint16_t>(mesh->mFaces[x].mIndices[a]+ currentvertex);
}
}
}
//load the textures
std::string pathtomodel(GetPath(file));
Batch *batch = new Batch();
LoadMaterials(mesh, load->mMaterials, batch, pathtomodel, Asset_Dir);
batch->NumIndices=mesh->mNumFaces*3;
batch->StartIndex = static_cast<uint32_t>(currentindex);
batch->NumVerts= mesh->mNumVertices;
// make sure to increment the ref count for thesse so they are properly destroyed
currentvertex+=mesh->mNumVertices;
currentindex+=mesh->mNumFaces*3;
//For now, there will be a new shader for each material. I will create a shader cache where the graphics lib will cache the shaders and issue out already created shaders like it does with textures.
Graphics::Shader_Macro macro1[] = {
{"NORMALMAP", "1" },
{"MATRIX_PALETTE_SIZE_DEFAULT", "60" },
{NULL, NULL}
};
Graphics::Shader_Macro macro0[] = {
{"NORMALMAP", "0" },
{"MATRIX_PALETTE_SIZE_DEFAULT", "60" },
{NULL, NULL}
};
Graphics::Shader_Macro* ptr = nullptr;
if(batch->Has_NormalMap()) ptr = macro1;
else ptr = macro0;
batch->GetVS()->CompileShaderFromFile("Animated_Mesh.fx", "VS", "vs_4_0", ptr);
FormatDesc lay[] = {
FormatDesc(),
FormatDesc(TYPE_TEXCOORD, FORMAT_FLOAT, 2),
FormatDesc(TYPE_NORMAL, FORMAT_FLOAT, 3),
FormatDesc(TYPE_TANGENT, FORMAT_FLOAT, 3),
FormatDesc(TYPE_BONE, FORMAT_FLOAT, 4),
FormatDesc(TYPE_WEIGHT, FORMAT_FLOAT, 4)
};
batch->GetVS()->CreateInputLayout(lay, sizeof(lay)/sizeof(FormatDesc));
batch->GetPS()->CompileShaderFromFile("Animated_Mesh.fx", "PS", "ps_4_0", ptr);
Batches.push_back(batch);
}
Animatior.Init(load);
aiReleaseImport(load);// free the resrouces
if(currentvertex==0) {// this could happen, if so GET OUTOF HERE
OUTPUT_DEBUG_MSG("Problem loading the mesh, there were no vertices loaded. Failed to load the mesh");
return false;
}
VB[0].Create(currentvertex, sizeof(Vertex_Types::Pos_Tex_Norm_Tang_Bone_Weight), VERTEX_BUFFER, IMMUTABLE, CPU_NONE, &tempverts[0] );
IB.Create(currentindex, IB.Stride, INDEX_BUFFER, IMMUTABLE, CPU_NONE, &Indices[0]); // create index buffer!
OUTPUT_DEBUG_MSG("Finished Loading the Mesh");
Name=FileName =file;
return true;
}
