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Removed Original mesh compiler, rewriting mesh loader to reflect ModelCompiler format

This commit is contained in:
Xiao Qi 2022-11-02 20:50:51 +08:00
parent e2778da955
commit 2beae24924
5 changed files with 72 additions and 341 deletions
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42
SHADE_Engine/src/Assets/Asset Types/SHMeshAsset.h
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@ -18,24 +18,32 @@
namespace SHADE
{
struct SH_API SHMeshAssetHeader
{
uint32_t vertexCount;
uint32_t indexCount;
std::string name;
};
struct SHMeshDataHeader
{
uint32_t vertexCount;
uint32_t indexCount;
uint32_t charCount;
};
struct SH_API SHMeshAsset : SHAssetData
{
bool compiled;
bool changed;
struct SHMeshData
{
std::string name;
std::vector<SHVec3> vertexPosition;
std::vector<SHVec3> vertexTangent;
std::vector<SHVec3> vertexNormal;
std::vector<SHVec2> texCoords;
std::vector<uint32_t> indices;
};
SHMeshAssetHeader header;
struct SHMeshAssetHeader
{
size_t meshCount;
};
std::vector<SHVec3> vertexPosition;
std::vector<SHVec3> vertexTangent;
std::vector<SHVec3> vertexNormal;
std::vector<SHVec2> texCoords;
std::vector<uint32_t> indices;
};
struct SH_API SHMeshAsset : SHAssetData
{
SHMeshAssetHeader header;
std::vector<SHMeshDataHeader> headers;
std::vector<SHMeshData> meshes;
};
}

201
SHADE_Engine/src/Assets/Libraries/Compilers/SHMeshCompiler.cpp
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@ -1,201 +0,0 @@
/*************************************************************************//**
* \file SHMeshCompiler.cpp
* \author Loh Xiao Qi
* \date 30 September 2022
* \brief Library to write data in SHMeshAsset into binary file for faster
* loading in the future
*
*
* Copyright (C) 2022 DigiPen Institute of Technology. Reproduction or
* disclosure of this file or its contents without the prior written consent
* of DigiPen Institute of Technology is prohibited.
*****************************************************************************/
#include "SHpch.h"
#include "SHMeshCompiler.h"
#include "Graphics/MiddleEnd/Meshes/SHMeshData.h"
#include <assimp/postprocess.h>
#include <fstream>
namespace SHADE
{
Assimp::Importer SHMeshCompiler::aiImporter;
void SHMeshCompiler::ProcessNode(aiNode const& node, aiScene const& scene, MeshVectorRef meshes) noexcept
{
for (size_t i{ 0 }; i < node.mNumMeshes; ++i)
{
aiMesh* mesh = scene.mMeshes[node.mMeshes[i]];
meshes.push_back(ProcessMesh(*mesh));
}
for (size_t i{ 0 }; i < node.mNumChildren; ++i)
{
ProcessNode(*node.mChildren[i], scene, meshes);
}
}
void SHMeshCompiler::ExtractAnimations(aiScene const& scene, AnimVectorRef anims) noexcept
{
if (scene.HasAnimations())
{
std::vector<SHAnimationAsset> anims(scene.mNumAnimations);
for (auto i{ 0 }; i < scene.mNumAnimations; ++i)
{
auto const& anim{ *scene.mAnimations[i] };
anims[i].name = anim.mName.C_Str();
anims[i].duration = anim.mDuration;
anims[i].ticksPerSecond = anim.mTicksPerSecond;
std::copy_n(anim.mChannels, anim.mNumChannels, anims[i].nodeChannels.data());
std::copy_n(anim.mMeshChannels, anim.mNumMeshChannels, anims[i].meshChannels.data());
std::copy_n(anim.mMorphMeshChannels, anim.mNumMorphMeshChannels, anims[i].morphMeshChannels.data());
}
}
}
SHMeshAsset* SHMeshCompiler::ProcessMesh(aiMesh const& mesh) noexcept
{
SHMeshAsset* result = new SHMeshAsset();
result->compiled = false;
result->changed = false;
for (size_t i{ 0 }; i < mesh.mNumVertices; ++i)
{
// Vertex position
SHVec3 vertex;
vertex.x = mesh.mVertices[i].x;
vertex.y = mesh.mVertices[i].y;
vertex.z = mesh.mVertices[i].z;
result->vertexPosition.push_back(vertex);
// Tex coords
SHVec2 texCoord{ 0.f, 0.f };
if (mesh.mTextureCoords[0])
{
texCoord.x = mesh.mTextureCoords[0][i].x;
texCoord.y = mesh.mTextureCoords[0][i].y;
}
result->texCoords.push_back(texCoord);
// Normals
SHVec3 normal{ 0.f, 0.f, 0.f };
if (mesh.mNormals)
{
normal.x = mesh.mNormals[i].x;
normal.y = mesh.mNormals[i].y;
normal.z = mesh.mNormals[i].z;
}
result->vertexNormal.push_back(normal);
// Tangent
SHVec3 tangent{ 0.f, 0.f, 0.f };
if (mesh.mTangents)
{
tangent.x = mesh.mTangents[i].x;
tangent.y = mesh.mTangents[i].y;
tangent.z = mesh.mTangents[i].z;
}
result->vertexTangent.push_back(tangent);
}
for (size_t i{ 0 }; i < mesh.mNumFaces; ++i)
{
aiFace face = mesh.mFaces[i];
for (size_t j{ 0 }; j < face.mNumIndices; ++j)
{
result->indices.push_back(face.mIndices[j]);
}
}
result->header.vertexCount = static_cast<uint32_t>(result->vertexPosition.size());
result->header.indexCount = static_cast<uint32_t>(result->indices.size());
result->header.name = mesh.mName.C_Str();
return result;
}
void SHMeshCompiler::LoadFromFile(AssetPath path, MeshVectorRef meshes, AnimVectorRef anims) noexcept
{
const aiScene* scene = aiImporter.ReadFile(path.string().c_str(),
aiProcess_Triangulate // Make sure we get triangles rather than nvert polygons
| aiProcess_GenUVCoords // Convert any type of mapping to uv mapping
| aiProcess_TransformUVCoords // preprocess UV transformations (scaling, translation ...)
| aiProcess_FindInstances // search for instanced meshes and remove them by references to one master
| aiProcess_CalcTangentSpace // calculate tangents and bitangents if possible
| aiProcess_JoinIdenticalVertices // join identical vertices/ optimize indexing
| aiProcess_RemoveRedundantMaterials // remove redundant materials
| aiProcess_FindInvalidData // detect invalid model data, such as invalid normal vectors
| aiProcess_FlipUVs // flip the V to match the Vulkans way of doing UVs
);
if (!scene || !scene->HasMeshes())
{
SHLOG_ERROR("ERROR in GLTF::ASSIMP: {}\nFile: {}", aiImporter.GetErrorString(), path.string());
return;
}
//ExtractAnimations(*scene, anims);
ProcessNode(*scene->mRootNode, *scene, meshes);
aiImporter.FreeScene();
}
std::optional<AssetPath> SHMeshCompiler::CompileMeshBinary(SHMeshAsset const& asset, AssetPath path) noexcept
{
std::string newPath{ path.parent_path().string() + '/' };
newPath += asset.header.name + MESH_EXTENSION.data();
std::ofstream file{ newPath, std::ios::out | std::ios::binary | std::ios::trunc };
if (!file.is_open())
{
SHLOG_ERROR("Unable to open file for writing mesh file: {}", path.string());
}
file.write(
reinterpret_cast<char const*>(&(asset.header.vertexCount)),
sizeof(uint32_t)
);
file.write(
reinterpret_cast<const char*>(&(asset.header.indexCount)),
sizeof(uint32_t)
);
auto const vertexVec3Byte{ sizeof(SHVec3) * asset.header.vertexCount };
auto const vertexVec2Byte{ sizeof(SHVec2) * asset.header.vertexCount };
file.write(
reinterpret_cast<char const*>(asset.vertexPosition.data()),
vertexVec3Byte
);
file.write(
reinterpret_cast<char const*>(asset.vertexTangent.data()),
vertexVec3Byte
);
file.write(
reinterpret_cast<char const*>(asset.vertexNormal.data()),
vertexVec3Byte
);
file.write(
reinterpret_cast<char const*>(asset.texCoords.data()),
vertexVec2Byte
);
file.write(
reinterpret_cast<char const*>(asset.indices.data()),
sizeof(uint32_t) * asset.header.indexCount
);
file.close();
return newPath;
}
}

40
SHADE_Engine/src/Assets/Libraries/Compilers/SHMeshCompiler.h
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@ -1,40 +0,0 @@
/*************************************************************************//**
* \file SHMeshCompiler.h
* \author Loh Xiao Qi
* \date 30 September 2022
* \brief Library to write data in SHMeshAsset into binary file for faster
* loading in the future
*
*
* Copyright (C) 2022 DigiPen Institute of Technology. Reproduction or
* disclosure of this file or its contents without the prior written consent
* of DigiPen Institute of Technology is prohibited.
*****************************************************************************/
#pragma once
#include <assimp/Importer.hpp>
#include <assimp/scene.h>
#include <vector>
#include "Assets/Asset Types/SHAnimationAsset.h"
#include "Assets/Asset Types/SHMeshAsset.h"
#include "Assets/SHAssetMacros.h"
namespace SHADE
{
class SHMeshCompiler
{
using MeshVectorRef = std::vector<SHMeshAsset*>&;
using AnimVectorRef = std::vector<SHAnimationAsset*>&;
static Assimp::Importer aiImporter;
static void ProcessNode(aiNode const& node, aiScene const& scene, MeshVectorRef meshes) noexcept;
static void ExtractAnimations(aiScene const& scene, AnimVectorRef anims) noexcept;
static SHMeshAsset* ProcessMesh(aiMesh const& mesh) noexcept;
public:
static void LoadFromFile(AssetPath path, MeshVectorRef meshes, AnimVectorRef anims) noexcept;
static std::optional<AssetPath> CompileMeshBinary(SHMeshAsset const& asset, AssetPath path) noexcept;
};
}

123
SHADE_Engine/src/Assets/Libraries/Loaders/SHMeshLoader.cpp
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@ -16,6 +16,36 @@
namespace SHADE
{
void SHMeshLoader::ReadHeader(std::ifstream& file, SHMeshDataHeader& header) noexcept
{
file.read(
reinterpret_cast<char*>(&header),
sizeof(SHMeshDataHeader)
);
}
void SHMeshLoader::ReadData(std::ifstream& file, SHMeshDataHeader const& header, SHMeshData& data) noexcept
{
auto const vertexVec3Byte{ sizeof(SHVec3) * header.vertexCount };
auto const vertexVec2Byte{ sizeof(SHVec2) * header.indexCount };
data.vertexPosition.resize(header.vertexCount);
data.vertexTangent.resize(header.vertexCount);
data.vertexNormal.resize(header.vertexCount);
data.texCoords.resize(header.vertexCount);
data.indices.resize(header.indexCount);
file.read(data.name.data(), header.charCount);
file.read(reinterpret_cast<char*>(data.vertexPosition.data()), vertexVec3Byte);
file.read(reinterpret_cast<char*>(data.vertexTangent.data()), vertexVec3Byte);
file.read(reinterpret_cast<char*>(data.vertexNormal.data()), vertexVec3Byte);
file.read(reinterpret_cast<char*>(data.texCoords.data()), vertexVec2Byte);
file.read(reinterpret_cast<char*>(data.indices.data()), sizeof(uint32_t) * header.indexCount);
}
void SHMeshLoader::LoadSHMesh(AssetPath path, SHMeshAsset& mesh) noexcept
{
std::ifstream file{ path.string(), std::ios::in | std::ios::binary };
@ -25,46 +55,21 @@ namespace SHADE
return;
}
const std::string name{ path.stem().string() };
file.seekg(0);
uint32_t vertCount, indexCount;
std::vector<SHVec3> vertPos, vertTan, vertNorm;
std::vector<SHVec2> texCoord;
std::vector<uint32_t> indices;
file.read(
reinterpret_cast<char *>(&mesh.header),
sizeof(SHMeshAssetHeader)
);
file.read(reinterpret_cast<char*>(&vertCount), sizeof(uint32_t));
file.read(reinterpret_cast<char*>(&indexCount), sizeof(uint32_t));
auto const vertexVec3Byte{ sizeof(SHVec3) * vertCount };
auto const vertexVec2Byte{ sizeof(SHVec2) * vertCount };
vertPos.resize(vertCount);
vertTan.resize(vertCount);
vertNorm.resize(vertCount);
texCoord.resize(vertCount);
indices.resize(indexCount);
file.read(reinterpret_cast<char *>(vertPos.data()), vertexVec3Byte);
file.read(reinterpret_cast<char *>(vertTan.data()), vertexVec3Byte);
file.read(reinterpret_cast<char *>(vertNorm.data()), vertexVec3Byte);
file.read(reinterpret_cast<char *>(texCoord.data()), vertexVec2Byte);
file.read(reinterpret_cast<char *>(indices.data()), sizeof(uint32_t) * indexCount);
mesh.compiled = true;
mesh.changed = false;
mesh.header.indexCount = indexCount;
mesh.header.vertexCount = vertCount;
mesh.header.name = name;
mesh.vertexPosition = std::move(vertPos);
mesh.vertexTangent = std::move(vertTan);
mesh.vertexNormal = std::move(vertNorm);
mesh.texCoords = std::move(texCoord);
mesh.indices = std::move(indices);
mesh.headers.resize(mesh.header.meshCount);
mesh.meshes.resize(mesh.header.meshCount);
for (auto i{ 0 }; i < mesh.header.meshCount; ++i)
{
ReadHeader(file, mesh.headers[i]);
ReadData(file, mesh.headers[i], mesh.meshes[i]);
}
file.close();
}
@ -79,52 +84,6 @@ namespace SHADE
void SHMeshLoader::Write(SHAssetData const* data, AssetPath path)
{
std::ofstream file{ path, std::ios::out | std::ios::binary | std::ios::trunc };
if (!file.is_open())
{
SHLOG_ERROR("Unable to open file for writing mesh file: {}", path.string());
}
auto asset = *dynamic_cast<SHMeshAsset const*>(data);
file.write(
reinterpret_cast<char const*>(&(asset.header.vertexCount)),
sizeof(uint32_t)
);
file.write(
reinterpret_cast<const char*>(&(asset.header.indexCount)),
sizeof(uint32_t)
);
auto const vertexVec3Byte{ sizeof(SHVec3) * asset.header.vertexCount };
auto const vertexVec2Byte{ sizeof(SHVec2) * asset.header.vertexCount };
file.write(
reinterpret_cast<char const*>(asset.vertexPosition.data()),
vertexVec3Byte
);
file.write(
reinterpret_cast<char const*>(asset.vertexTangent.data()),
vertexVec3Byte
);
file.write(
reinterpret_cast<char const*>(asset.vertexNormal.data()),
vertexVec3Byte
);
file.write(
reinterpret_cast<char const*>(asset.texCoords.data()),
vertexVec2Byte
);
file.write(
reinterpret_cast<char const*>(asset.indices.data()),
sizeof(uint32_t) * asset.header.indexCount
);
file.close();
}
}

7
SHADE_Engine/src/Assets/Libraries/Loaders/SHMeshLoader.h
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@ -12,11 +12,16 @@
#pragma once
#include "Assets/Asset Types/SHMeshAsset.h"
#include "SHAssetLoader.h"
#include <fstream>
namespace SHADE
{
struct SHMeshLoader : SHAssetLoader
class SHMeshLoader : public SHAssetLoader
{
void ReadHeader(std::ifstream& file, SHMeshDataHeader& header) noexcept;
void ReadData(std::ifstream& file, SHMeshDataHeader const& header, SHMeshData& data) noexcept;
public:
void LoadSHMesh(AssetPath path, SHMeshAsset& meshes) noexcept;
SHAssetData* Load(AssetPath path) override;
void Write(SHAssetData const* data, AssetPath path) override;