SWBF2-Classic-Msh-Viewer/MshViewer/Source/Object.cpp

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#include "Object.h"
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#include <iostream>
#define PI (4.0*atan(1.0))
/////////////////////////////////////////////////////////////////////////
// public constructor/destructor
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Object::Object(const char* path)
{
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// open file
fsMesh.open(path, std::ios::in | std::ios::binary);
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if (!fsMesh.is_open())
throw std::invalid_argument(std::string("file not found: ") += path);
// jump to file size information
fsMesh.seekg(4);
std::uint32_t tempFileSize;
std::list<ChunkHeader*> tempMainChunks;
// get all chunks under HEDR
fsMesh.read(reinterpret_cast<char*>(&tempFileSize), sizeof(tempFileSize));
loadChunks(tempMainChunks, fsMesh.tellg(), tempFileSize);
// evaluate HEDR subchunks (= find MSH2)
for (std::list<ChunkHeader*>::iterator it = tempMainChunks.begin(); it != tempMainChunks.end(); it++)
{
if (!strcmp("MSH2", (*it)->name))
{
// get all subchunks
std::list<ChunkHeader*> tempMsh2Chunks;
loadChunks(tempMsh2Chunks, (*it)->position, (*it)->size);
// evaluate MSH2 subchunks
analyseMsh2Chunks(tempMsh2Chunks);
// clean up
while (!tempMsh2Chunks.empty())
{
ChunkHeader* tempCursor = tempMsh2Chunks.front();
tempMsh2Chunks.pop_front();
delete tempCursor;
}
continue;
}
}
// clean up
while (!tempMainChunks.empty())
{
ChunkHeader* tempCursor = tempMainChunks.front();
tempMainChunks.pop_front();
delete tempCursor;
}
// close file
fsMesh.close();
}
Object::~Object()
{
// clear texture list
vTextures.clear();
// clear Model list (don't delete the elements)
vModls.clear();
}
/////////////////////////////////////////////////////////////////////////
// private functions
void Object::setModlDefault(Modl * model)
{
model->name = "";
model->parent = "";
model->type = null;
model->renderFlags = -1;
model->m4x4Translation = glm::mat4(1.0f);
model->texture = "";
model->vertex = NULL;
model->uv = NULL;
model->mesh = NULL;
model->meshSize = 0;
}
void Object::loadChunks(std::list<ChunkHeader*>& destination, std::streampos start, const std::uint32_t end)
{
// jump to first chunk
fsMesh.seekg(start);
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do
{
ChunkHeader* tempHeader = new ChunkHeader();
fsMesh.read(reinterpret_cast<char*>(&tempHeader->name[0]), sizeof(tempHeader->name) - 1);
fsMesh.read(reinterpret_cast<char*>(&tempHeader->size), sizeof(tempHeader->size));
tempHeader->position = fsMesh.tellg();
destination.push_back(tempHeader);
fsMesh.seekg(tempHeader->size, std::ios_base::cur);
// reached end
if (fsMesh.tellg() - start == end)
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break;
// error. Maybe the size information is corrupted
if (!fsMesh.good())
{
std::cout << "WARNING: corrupted file. Trying to continue" << std::endl;
fsMesh.clear();
break;
}
} while (true);
}
void Object::analyseMsh2Chunks(std::list<ChunkHeader*>& chunkList)
{
for (std::list<ChunkHeader*>::iterator it = chunkList.begin(); it != chunkList.end(); it++)
{
if (!strcmp("MATL", (*it)->name))
{
// "useless" information how many MATD follow
fsMesh.seekg((*it)->position);
std::uint32_t tempMatdCount;
fsMesh.read(reinterpret_cast<char*>(&tempMatdCount), sizeof(std::uint32_t));
// get all MATD from MATL list
std::list<ChunkHeader*> tempMatlChunks;
loadChunks(tempMatlChunks, fsMesh.tellg(), (*it)->size - 4);
// evaluate MATL subchunks
for (std::list<ChunkHeader*>::iterator it = tempMatlChunks.begin(); it != tempMatlChunks.end(); it++)
{
// This shouldn't be anything else than MATD
if (!strcmp("MATD", (*it)->name))
{
// get all subchunks from MATD
std::list<ChunkHeader*> tempMatdChunks;
loadChunks(tempMatdChunks, (*it)->position, (*it)->size);
// analyse MATD subchunks
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analyseMatdChunks(tempMatdChunks);
// clean up
while (!tempMatdChunks.empty())
{
ChunkHeader* tempCursor = tempMatdChunks.front();
tempMatdChunks.pop_front();
delete tempCursor;
}
}
}
// clean up
while (!tempMatlChunks.empty())
{
ChunkHeader* tempCursor = tempMatlChunks.front();
tempMatlChunks.pop_front();
delete tempCursor;
}
continue;
}
if (!strcmp("MODL", (*it)->name))
{
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Modl* tempModl = new Modl;
setModlDefault(tempModl);
// get all subchunks
std::list<ChunkHeader*> tempChunks;
loadChunks(tempChunks, (*it)->position, (*it)->size);
// evaluate MODL subchunks
analyseModlChunks(tempModl, tempChunks);
//clean up
while (!tempChunks.empty())
{
ChunkHeader* tempCursor = tempChunks.front();
tempChunks.pop_front();
delete tempCursor;
}
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// save Model data
vModls.push_back(tempModl);
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continue;
}
}
}
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void Object::analyseMatdChunks(std::list<ChunkHeader*>& chunkList)
{
for (std::list<ChunkHeader*>::iterator it = chunkList.begin(); it != chunkList.end(); it++)
{
//TX1D, TX2D, TX3D
if (!strcmp("TX0D", (*it)->name))
{
fsMesh.seekg((*it)->position);
char* buffer = new char[(*it)->size + 1];
*buffer = { 0 };
fsMesh.read(buffer, (*it)->size);
vTextures.push_back(buffer);
delete buffer;
continue;
}
}
}
void Object::analyseModlChunks(Modl* dataDestination, std::list<ChunkHeader*>& chunkList)
{
for (std::list<ChunkHeader*>::iterator it = chunkList.begin(); it != chunkList.end(); it++)
{
if (!strcmp("MTYP", (*it)->name))
{
fsMesh.seekg((*it)->position);
std::uint32_t tempType;
fsMesh.read(reinterpret_cast<char*>(&tempType), sizeof(tempType));
dataDestination->type = (Mtyp)tempType;
continue;
}
if (!strcmp("PRNT", (*it)->name))
{
fsMesh.seekg((*it)->position);
char* buffer = new char[(*it)->size];
*buffer = { 0 };
fsMesh.read(buffer, (*it)->size);
dataDestination->parent = buffer;
delete buffer;
continue;
}
if (!strcmp("NAME", (*it)->name))
{
fsMesh.seekg((*it)->position);
char* buffer = new char[(*it)->size];
*buffer = { 0 };
fsMesh.read(buffer, (*it)->size);
dataDestination->name = buffer;
delete buffer;
continue;
}
if (!strcmp("FLGS", (*it)->name))
{
fsMesh.seekg((*it)->position);
fsMesh.read(reinterpret_cast<char*>(&dataDestination->renderFlags), sizeof(dataDestination->renderFlags));
continue;
}
if (!strcmp("TRAN", (*it)->name))
{
float tempScale[3];
float tempRotation[4];
float tempTrans[3];
fsMesh.seekg((*it)->position);
fsMesh.read(reinterpret_cast<char*>(&tempScale[0]), sizeof(float));
fsMesh.read(reinterpret_cast<char*>(&tempScale[1]), sizeof(float));
fsMesh.read(reinterpret_cast<char*>(&tempScale[2]), sizeof(float));
fsMesh.read(reinterpret_cast<char*>(&tempRotation[0]), sizeof(float));
fsMesh.read(reinterpret_cast<char*>(&tempRotation[1]), sizeof(float));
fsMesh.read(reinterpret_cast<char*>(&tempRotation[2]), sizeof(float));
fsMesh.read(reinterpret_cast<char*>(&tempRotation[3]), sizeof(float));
//calculate x,y,z rotation
tempRotation[0] = atan2(2 * (tempRotation[0] * tempRotation[1] + tempRotation[2] * tempRotation[3]),
1 - 2 * (pow(tempRotation[1], 2) + pow(tempRotation[2], 2)));
tempRotation[1] = asin(2 * (tempRotation[0] * tempRotation[2] - tempRotation[3] * tempRotation[1]));
tempRotation[2] = atan2(2 * (tempRotation[0] * tempRotation[3] + tempRotation[1] * tempRotation[2]),
1 - 2 * (pow(tempRotation[2], 2) + pow(tempRotation[3], 2))) - PI;
fsMesh.read(reinterpret_cast<char*>(&tempTrans[0]), sizeof(float));
fsMesh.read(reinterpret_cast<char*>(&tempTrans[1]), sizeof(float));
fsMesh.read(reinterpret_cast<char*>(&tempTrans[2]), sizeof(float));
dataDestination->m4x4Translation = glm::scale(
dataDestination->m4x4Translation,
glm::vec3(tempScale[0], tempScale[1], tempScale[2])
);
dataDestination->m4x4Translation = glm::translate(
dataDestination->m4x4Translation,
glm::vec3(tempTrans[0], tempTrans[1], tempTrans[2])
);
dataDestination->m4x4Translation = glm::rotate(
dataDestination->m4x4Translation,
tempRotation[0],
glm::vec3(1, 0, 0)
);
dataDestination->m4x4Translation = glm::rotate(
dataDestination->m4x4Translation,
tempRotation[1],
glm::vec3(0, 1, 0)
);
dataDestination->m4x4Translation = glm::rotate(
dataDestination->m4x4Translation,
tempRotation[2],
glm::vec3(0, 0, 1)
);
continue;
}
if (!strcmp("GEOM", (*it)->name))
{
// get all subchunks
std::list<ChunkHeader*> tempGeomChunks;
loadChunks(tempGeomChunks, (*it)->position, (*it)->size);
// evaluate GEOM subchunks
analyseGeomChunks(dataDestination, tempGeomChunks);
// clean up
while (!tempGeomChunks.empty())
{
ChunkHeader* tempCursor = tempGeomChunks.front();
tempGeomChunks.pop_front();
delete tempCursor;
}
continue;
}
}
}
void Object::analyseGeomChunks(Modl * dataDestination, std::list<ChunkHeader*>& chunkList)
{
for (std::list<ChunkHeader*>::iterator it = chunkList.begin(); it != chunkList.end(); it++)
{
if (!strcmp("SEGM", (*it)->name))
{
// get all subchunks
std::list<ChunkHeader*> tempSegmChunks;
loadChunks(tempSegmChunks, (*it)->position, (*it)->size);
// evaluate SEGM subchunks
analyseSegmChunks(dataDestination, tempSegmChunks);
// clean up
while (!tempSegmChunks.empty())
{
ChunkHeader* tempCursor = tempSegmChunks.front();
tempSegmChunks.pop_front();
delete tempCursor;
}
continue;
}
if (!strcmp("CLTH", (*it)->name))
{
// get all subchunks
std::list<ChunkHeader*> tempClthChunks;
loadChunks(tempClthChunks, (*it)->position, (*it)->size);
// evaluate CLTH subchunks
analyseClthChunks(dataDestination, tempClthChunks);
// clean up
while (!tempClthChunks.empty())
{
ChunkHeader* tempCursor = tempClthChunks.front();
tempClthChunks.pop_front();
delete tempCursor;
}
continue;
}
}
}
void Object::analyseSegmChunks(Modl * dataDestination, std::list<ChunkHeader*>& chunkList)
{
for (std::list<ChunkHeader*>::iterator it = chunkList.begin(); it != chunkList.end(); it++)
{
/*if (!strcmp("SHDW", (*it)->name))
{
fsMesh.seekg((*it)->position);
/* shadow mesh geometry
long int - 4 - number of vertex positions
float[3][] - 12 each - vertex positions (XYZ)
long int - 4 - number of edges
short int[4][] - 8 each - edge the following 4 entries from one edge
> short int - 2 - vertex index of this edge, referes to the vertex list
> short int - 2 - Reference into an edge. Defines the target vertex (the local edge vertex of the referenced edge) to which the edge should be dran from the local vertex
> short int - 2 - Second reference into an edge. In all example .msh files I've seen this always refers to the same vertex as the first edge reference
> short int - 2 - MAX_VALUE of short integers (65535). Indicates the end of this edge
* /
continue;
}*/
if (!strcmp("MATI", (*it)->name))
{
fsMesh.seekg((*it)->position);
std::uint32_t tempIndex;
fsMesh.read(reinterpret_cast<char*>(&tempIndex), sizeof(tempIndex));
if (vTextures.size() <= tempIndex)
{
std::cout << "warning texture index <" << tempIndex << "> unknown" << std::endl;
dataDestination->texture = "";
continue;
}
dataDestination->texture = vTextures[tempIndex];
continue;
}
if (!strcmp("POSL", (*it)->name))
{
readVertex(dataDestination, (*it)->position);
continue;
}
/*if (!strcmp("NRML", (*it)->name))
{
fsMesh.seekg((*it)->position);
// List of normals
// long int - 4 - number of normal vectores stored in this list
// float[3][] - 12 each - UVW vector for each vertex
continue;
}*/
if (!strcmp("UV0L", (*it)->name))
{
readUV(dataDestination, (*it)->position);
continue;
}
if (!strcmp("STRP", (*it)->name))
{
fsMesh.seekg((*it)->position);
fsMesh.seekg((*it)->position);
fsMesh.read(reinterpret_cast<char*>(&dataDestination->meshSize), sizeof(dataDestination->meshSize));
dataDestination->mesh = new std::uint32_t[dataDestination->meshSize];
for (unsigned int i = 0; i < dataDestination->meshSize; i += 3)
{
std::uint16_t tempValue[3];
fsMesh.read(reinterpret_cast<char*>(&tempValue[0]), sizeof(std::uint16_t));
fsMesh.read(reinterpret_cast<char*>(&tempValue[1]), sizeof(std::uint16_t));
fsMesh.read(reinterpret_cast<char*>(&tempValue[2]), sizeof(std::uint16_t));
if (!(tempValue[0] >> 15 && tempValue[1] >> 15 && !(tempValue[2] >> 15)))
throw std::invalid_argument("invalid file. go and triangulate!");
tempValue[0] = (std::uint16_t(tempValue[0] << 1) >> 1);
tempValue[1] = (std::uint16_t(tempValue[1] << 1) >> 1);
dataDestination->mesh[i] = (std::uint32_t)tempValue[0];
dataDestination->mesh[i + 1] = (std::uint32_t)tempValue[1];
dataDestination->mesh[i + 2] = (std::uint32_t)tempValue[2];
}
continue;
}
}
}
void Object::analyseClthChunks(Modl * dataDestination, std::list<ChunkHeader*>& chunkList)
{
for (std::list<ChunkHeader*>::iterator it = chunkList.begin(); it != chunkList.end(); it++)
{
if (!strcmp("CTEX", (*it)->name))
{
fsMesh.seekg((*it)->position);
char* buffer = new char[(*it)->size];
*buffer = { 0 };
fsMesh.read(buffer, (*it)->size);
dataDestination->texture = buffer;
delete buffer;
continue;
}
if (!strcmp("CPOS", (*it)->name))
{
readVertex(dataDestination, (*it)->position);
continue;
}
if (!strcmp("CUV0", (*it)->name))
{
readUV(dataDestination, (*it)->position);
continue;
}
if (!strcmp("CMSH", (*it)->name))
{
fsMesh.seekg((*it)->position);
fsMesh.read(reinterpret_cast<char*>(&dataDestination->meshSize), sizeof(dataDestination->meshSize));
dataDestination->mesh = new std::uint32_t[dataDestination->meshSize * 3];
for (unsigned int i = 0; i < dataDestination->meshSize; i += 3)
{
fsMesh.read(reinterpret_cast<char*>(&dataDestination->mesh[i]), sizeof(std::uint32_t));
fsMesh.read(reinterpret_cast<char*>(&dataDestination->mesh[i + 1]), sizeof(std::uint32_t));
fsMesh.read(reinterpret_cast<char*>(&dataDestination->mesh[i + 2]), sizeof(std::uint32_t));
}
continue;
}
}
}
void Object::readVertex(Modl* dataDestination, std::streampos position)
{
std::uint32_t tempSize;
fsMesh.seekg(position);
fsMesh.read(reinterpret_cast<char*>(&tempSize), sizeof(tempSize));
dataDestination->vertex = new float[tempSize * 3];
for (unsigned int i = 0; i < tempSize * 3; i++)
fsMesh.read(reinterpret_cast<char*>(&dataDestination->vertex[i]), sizeof(float));
}
void Object::readUV(Modl* dataDestination, std::streampos position)
{
std::uint32_t tempSize;
fsMesh.seekg(position);
fsMesh.read(reinterpret_cast<char*>(&tempSize), sizeof(tempSize));
dataDestination->uv = new float[tempSize * 2];
for (unsigned int i = 0; i < tempSize * 2; i++)
fsMesh.read(reinterpret_cast<char*>(&dataDestination->uv[i]), sizeof(float));
}
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/////////////////////////////////////////////////////////////////////////
// public getter
std::vector<Modl*> Object::getModels() const
{
return vModls;
}
/////////////////////////////////////////////////////////////////////////
// public functions