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BuildH3D.cpp
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#include "ModelH3D.h"
#include "ModelLoader.h"
#include "MeshConvert.h"
#include "TextureConvert.h"
#include "glTF.h"
#include <map>
#include <vector>
#include <string>
#include <locale>
using namespace std;
using namespace Renderer;
bool FileExists( const std::wstring& fileName )
{
struct _stat64 fileStat;
return _wstat64(fileName.c_str(), &fileStat) == 0;
}
bool ModelH3D::BuildModel(ModelData& model, const std::wstring& basePath) const
{
model.m_SceneGraph.resize(1);
GraphNode& node = model.m_SceneGraph[0];
node.xform = Matrix4(kIdentity);
node.rotation = Quaternion(kIdentity);
node.scale = XMFLOAT3(1.0f, 1.0f, 1.0f);
node.matrixIdx = 0;
node.hasSibling = 0;
model.m_MaterialTextures.resize(m_Header.materialCount);
model.m_MaterialConstants.resize(m_Header.materialCount);
model.m_TextureNames.clear();
model.m_TextureOptions.clear();
std::map<std::string, uint16_t> fileNameMap;
for (uint32_t i = 0; i < m_Header.materialCount; ++i)
{
const Material& material = GetMaterial(i);
MaterialTextureData& textureData = model.m_MaterialTextures[i];
textureData.addressModes = 0x55555;
const string& baseColorPath = material.texDiffusePath;
const string& metallicRoughnessPath = material.texSpecularPath;
const string& emissivePath = material.texEmissivePath;
const string& normalPath = material.texNormalPath;
const wstring baseColorFullPath = basePath + Utility::UTF8ToWideString(baseColorPath);
const wstring metallicRoughnessFullPath = basePath + Utility::UTF8ToWideString(metallicRoughnessPath);
const wstring emissiveFullPath = basePath + Utility::UTF8ToWideString(emissivePath);
const wstring normalFullPath = basePath + Utility::UTF8ToWideString(normalPath);
textureData.stringIdx[kBaseColor] = 0xFFFF;
textureData.stringIdx[kMetallicRoughness] = 0xFFFF;
textureData.stringIdx[kOcclusion] = 0xFFFF;
textureData.stringIdx[kEmissive] = 0xFFFF;
textureData.stringIdx[kNormal] = 0xFFFF;
bool alphaTest = false;
const string lowerCaseName = Utility::ToLower(baseColorPath);
if (lowerCaseName.find("thorn") != string::npos ||
lowerCaseName.find("plant") != string::npos ||
lowerCaseName.find("chain") != string::npos)
{
alphaTest = true;
}
// Handle base color texture
auto mapLookup = fileNameMap.find(baseColorPath);
if (mapLookup != fileNameMap.end())
{
textureData.stringIdx[kBaseColor] = mapLookup->second;
}
else if (baseColorPath.size() > 0 && FileExists(baseColorFullPath))
{
fileNameMap[baseColorPath] = (uint16_t)model.m_TextureNames.size();
textureData.stringIdx[kBaseColor] = (uint16_t)model.m_TextureNames.size();
model.m_TextureNames.push_back(baseColorPath);
model.m_TextureOptions.push_back(TextureOptions(true, alphaTest, true));
}
// Handle occlusionMetallicRoughness texture
mapLookup = fileNameMap.find(metallicRoughnessPath);
if (mapLookup != fileNameMap.end())
{
textureData.stringIdx[kMetallicRoughness] = mapLookup->second;
}
else if (metallicRoughnessPath.size() > 0 && FileExists(metallicRoughnessFullPath))
{
fileNameMap[metallicRoughnessPath] = (uint16_t)model.m_TextureNames.size();
textureData.stringIdx[kMetallicRoughness] = (uint16_t)model.m_TextureNames.size();
textureData.stringIdx[kOcclusion] = (uint16_t)model.m_TextureNames.size();
model.m_TextureNames.push_back(metallicRoughnessPath);
model.m_TextureOptions.push_back(TextureOptions(false, false, true));
}
// Handle emissive texture
mapLookup = fileNameMap.find(emissivePath);
if (mapLookup != fileNameMap.end())
{
textureData.stringIdx[kEmissive] = mapLookup->second;
}
else if (emissivePath.size() > 0 && FileExists(emissiveFullPath))
{
fileNameMap[emissivePath] = (uint16_t)model.m_TextureNames.size();
textureData.stringIdx[kEmissive] = (uint16_t)model.m_TextureNames.size();
model.m_TextureNames.push_back(emissivePath);
model.m_TextureOptions.push_back(TextureOptions(true, false, true));
}
// Handle normal texture
mapLookup = fileNameMap.find(normalPath);
if (mapLookup != fileNameMap.end())
{
textureData.stringIdx[kNormal] = mapLookup->second;
}
else if (normalPath.size() > 0 && FileExists(normalFullPath))
{
fileNameMap[normalPath] = (uint16_t)model.m_TextureNames.size();
textureData.stringIdx[kNormal] = (uint16_t)model.m_TextureNames.size();
model.m_TextureNames.push_back(normalPath);
model.m_TextureOptions.push_back(TextureOptions(false, false, true));
}
MaterialConstantData& constantData = model.m_MaterialConstants[i];
constantData.baseColorFactor[0] = 1.0f;
constantData.baseColorFactor[1] = 1.0f;
constantData.baseColorFactor[2] = 1.0f;
constantData.baseColorFactor[3] = 1.0f;
constantData.emissiveFactor[0] = 1.0f;
constantData.emissiveFactor[1] = 1.0f;
constantData.emissiveFactor[2] = 1.0f;
constantData.metallicFactor = 1.0f;
constantData.roughnessFactor = 1.0f;
constantData.normalTextureScale = 1.0f;
constantData.flags = 0x3C000000;
if (alphaTest)
constantData.flags |= 0x60; // twoSided + alphaTest
}
ASSERT(model.m_TextureOptions.size() == model.m_TextureNames.size());
for (size_t ti = 0; ti < model.m_TextureNames.size(); ++ti)
{
std::wstring fullPath = basePath + Utility::UTF8ToWideString(model.m_TextureNames[ti]);
CompileTextureOnDemand(fullPath, model.m_TextureOptions[ti]);
}
model.m_BoundingSphere = BoundingSphere(kZero);
model.m_BoundingBox = AxisAlignedBox(kZero);
// We're going to piggy-back off of the work to compile glTF meshes by pretending that's what
// we have.
for (uint32_t i = 0; i < m_Header.meshCount; ++i)
{
const Mesh& mesh = GetMesh(i);
glTF::Accessor PosStream;
PosStream.dataPtr = m_pVertexData + mesh.vertexDataByteOffset;
PosStream.stride = mesh.vertexStride;
PosStream.count = mesh.vertexCount;
PosStream.componentType = glTF::Accessor::kFloat;
PosStream.type = glTF::Accessor::kVec3;
glTF::Accessor UVStream;
UVStream.dataPtr = m_pVertexData + mesh.vertexDataByteOffset + 12;
UVStream.stride = mesh.vertexStride;
UVStream.count = mesh.vertexCount;
UVStream.componentType = glTF::Accessor::kFloat;
UVStream.type = glTF::Accessor::kVec2;
glTF::Accessor NormalStream;
NormalStream.dataPtr = m_pVertexData + mesh.vertexDataByteOffset + 20;
NormalStream.stride = mesh.vertexStride;
NormalStream.count = mesh.vertexCount;
NormalStream.componentType = glTF::Accessor::kFloat;
NormalStream.type = glTF::Accessor::kVec3;
glTF::Accessor IndexStream;
IndexStream.dataPtr = m_pIndexData + mesh.indexDataByteOffset;
IndexStream.stride = 2;
IndexStream.count = mesh.indexCount;
IndexStream.componentType = glTF::Accessor::kUnsignedShort;
IndexStream.type = glTF::Accessor::kScalar;
glTF::Material material;
material.flags = model.m_MaterialConstants[mesh.materialIndex].flags;
material.index = mesh.materialIndex;
glTF::Mesh gltfMesh;
gltfMesh.primitives.resize(1);
glTF::Primitive& prim = gltfMesh.primitives[0];
prim.attributes[glTF::Primitive::kPosition] = &PosStream;
prim.attributes[glTF::Primitive::kTexcoord0] = &UVStream;
prim.attributes[glTF::Primitive::kNormal] = &NormalStream;
prim.indices = &IndexStream;
prim.material = &material;
prim.attribMask = 0xB;
prim.mode = D3D_PRIMITIVE_TOPOLOGY_TRIANGLELIST;
memcpy(prim.minPos, &mesh.boundingBox.GetMin(), 12);
memcpy(prim.maxPos, &mesh.boundingBox.GetMax(), 12);
prim.minIndex = 0;
prim.maxIndex = 0;
BoundingSphere sphereOS;
AxisAlignedBox boxOS;
Renderer::CompileMesh(model.m_Meshes, model.m_GeometryData, gltfMesh, 0, Matrix4(kIdentity), sphereOS, boxOS);
model.m_BoundingSphere = model.m_BoundingSphere.Union(sphereOS);
model.m_BoundingBox.AddBoundingBox(boxOS);
}
return true;
}