bullet3/examples/Importers/ImportMeshUtility/b3ImportMeshUtility.cpp
Erwin Coumans a67df7fd03 fix cmake and premake build systems, after adding texture support in SDF,
in a nutshell, add the following two files:

examples/Importers/ImportMeshUtility/b3ImportMeshUtility.cpp
examples/ThirdPartyLibs/stb_image/stb_image.cpp
2016-06-19 17:35:25 -07:00

89 lines
2.4 KiB
C++

#include "b3ImportMeshUtility.h"
#include <vector>
#include"../../ThirdPartyLibs/Wavefront/tiny_obj_loader.h"
#include "LinearMath/btVector3.h"
#include "../ImportObjDemo/Wavefront2GLInstanceGraphicsShape.h"
#include "../../Utils/b3ResourcePath.h"
#include "Bullet3Common/b3FileUtils.h"
#include "../../ThirdPartyLibs/stb_image/stb_image.h"
bool b3ImportMeshUtility::loadAndRegisterMeshFromFileInternal(const std::string& fileName, b3ImportMeshData& meshData)
{
meshData.m_gfxShape = 0;
meshData.m_textureImage = 0;
meshData.m_textureHeight = 0;
meshData.m_textureWidth = 0;
char relativeFileName[1024];
if (b3ResourcePath::findResourcePath(fileName.c_str(), relativeFileName, 1024))
{
char pathPrefix[1024];
b3FileUtils::extractPath(relativeFileName, pathPrefix, 1024);
btVector3 shift(0,0,0);
std::vector<tinyobj::shape_t> shapes;
std::string err = tinyobj::LoadObj(shapes, relativeFileName, pathPrefix);
GLInstanceGraphicsShape* gfxShape = btgCreateGraphicsShapeFromWavefrontObj(shapes);
int textureIndex = -1;
//try to load some texture
for (int i=0;i<shapes.size();i++)
{
const tinyobj::shape_t& shape = shapes[i];
if (shape.material.diffuse_texname.length()>0)
{
int width,height,n;
const char* filename = shape.material.diffuse_texname.c_str();
unsigned char* image=0;
const char* prefix[]={ pathPrefix,"./","./data/","../data/","../../data/","../../../data/","../../../../data/"};
int numprefix = sizeof(prefix)/sizeof(const char*);
for (int i=0;!image && i<numprefix;i++)
{
char relativeFileName[1024];
sprintf(relativeFileName,"%s%s",prefix[i],filename);
char relativeFileName2[1024];
if (b3ResourcePath::findResourcePath(relativeFileName, relativeFileName2, 1024))
{
image = stbi_load(relativeFileName, &width, &height, &n, 3);
meshData.m_textureImage = image;
if (image)
{
meshData.m_textureWidth = width;
meshData.m_textureHeight = height;
} else
{
meshData.m_textureWidth = 0;
meshData.m_textureHeight = 0;
}
} else
{
b3Warning("not found %s\n",relativeFileName);
}
}
}
}
meshData.m_gfxShape = gfxShape;
return true;
}
else
{
b3Warning("Cannot find %s\n", fileName.c_str());
}
return false;
}