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#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 "stb_image/stb_image.h"
#include "../ImportObjDemo/LoadMeshFromObj.h"
#include "Bullet3Common/b3HashMap.h"
#include "../../CommonInterfaces/CommonFileIOInterface.h"
struct CachedTextureResult
{
std::string m_textureName;
int m_width;
int m_height;
unsigned char* m_pixels;
CachedTextureResult()
: m_width(0),
m_height(0),
m_pixels(0)
{
}
};
static b3HashMap<b3HashString, CachedTextureResult> gCachedTextureResults;
struct CachedTextureManager
{
CachedTextureManager()
{
}
virtual ~CachedTextureManager()
{
for (int i = 0; i < gCachedTextureResults.size(); i++)
{
CachedTextureResult* res = gCachedTextureResults.getAtIndex(i);
if (res)
{
free(res->m_pixels);
}
}
}
};
static CachedTextureManager sTexCacheMgr;
bool b3ImportMeshUtility::loadAndRegisterMeshFromFileInternal(const std::string& fileName, b3ImportMeshData& meshData, struct CommonFileIOInterface* fileIO)
{
B3_PROFILE("loadAndRegisterMeshFromFileInternal");
meshData.m_gfxShape = 0;
meshData.m_textureImage1 = 0;
meshData.m_textureHeight = 0;
meshData.m_textureWidth = 0;
meshData.m_flags = 0;
meshData.m_isCached = false;
char relativeFileName[1024];
if (fileIO->findResourcePath(fileName.c_str(), relativeFileName, 1024))
{
char pathPrefix[1024];
b3FileUtils::extractPath(relativeFileName, pathPrefix, 1024);
btVector3 shift(0, 0, 0);
std::vector<bt_tinyobj::shape_t> shapes;
bt_tinyobj::attrib_t attribute;
{
B3_PROFILE("tinyobj::LoadObj");
std::string err = LoadFromCachedOrFromObj(attribute, shapes, relativeFileName, pathPrefix, fileIO);
//std::string err = tinyobj::LoadObj(shapes, relativeFileName, pathPrefix);
}
GLInstanceGraphicsShape* gfxShape = btgCreateGraphicsShapeFromWavefrontObj(attribute, shapes);
{
B3_PROFILE("Load Texture");
//int textureIndex = -1;
//try to load some texture
for (int i = 0; meshData.m_textureImage1 == 0 && i < shapes.size(); i++)
{
const bt_tinyobj::shape_t& shape = shapes[i];
meshData.m_rgbaColor[0] = shape.material.diffuse[0];
meshData.m_rgbaColor[1] = shape.material.diffuse[1];
meshData.m_rgbaColor[2] = shape.material.diffuse[2];
meshData.m_rgbaColor[3] = shape.material.transparency;
meshData.m_flags |= B3_IMPORT_MESH_HAS_RGBA_COLOR;
meshData.m_specularColor[0] = shape.material.specular[0];
meshData.m_specularColor[1] = shape.material.specular[1];
meshData.m_specularColor[2] = shape.material.specular[2];
meshData.m_specularColor[3] = 1;
meshData.m_flags |= B3_IMPORT_MESH_HAS_SPECULAR_COLOR;
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 (fileIO->findResourcePath(relativeFileName, relativeFileName2, 1024))
{
if (b3IsFileCachingEnabled())
{
CachedTextureResult* texture = gCachedTextureResults[relativeFileName];
if (texture)
{
image = texture->m_pixels;
width = texture->m_width;
height = texture->m_height;
meshData.m_textureWidth = width;
meshData.m_textureHeight = height;
meshData.m_textureImage1 = image;
meshData.m_isCached = true;
}
}
if (image == 0)
{
b3AlignedObjectArray<char> buffer;
buffer.reserve(1024);
int fileId = fileIO->fileOpen(relativeFileName,"rb");
if (fileId>=0)
{
int size = fileIO->getFileSize(fileId);
if (size>0)
{
buffer.resize(size);
int actual = fileIO->fileRead(fileId,&buffer[0],size);
if (actual != size)
{
b3Warning("STL filesize mismatch!\n");
buffer.resize(0);
}
}
fileIO->fileClose(fileId);
}
if (buffer.size())
{
image = stbi_load_from_memory((const unsigned char*)&buffer[0], buffer.size(), &width, &height, &n, 3);
}
//image = stbi_load(relativeFileName, &width, &height, &n, 3);
meshData.m_textureImage1 = image;
if (image)
{
meshData.m_textureWidth = width;
meshData.m_textureHeight = height;
if (b3IsFileCachingEnabled())
{
CachedTextureResult result;
result.m_textureName = relativeFileName;
result.m_width = width;
result.m_height = height;
result.m_pixels = image;
meshData.m_isCached = true;
gCachedTextureResults.insert(relativeFileName, result);
}
}
else
{
b3Warning("Unsupported texture image format [%s]\n", relativeFileName);
break;
}
}
}
else
{
b3Warning("not found [%s]\n", relativeFileName);
}
}
}
}
}
meshData.m_gfxShape = gfxShape;
return true;
}
else
{
b3Warning("Cannot find %s\n", fileName.c_str());
}
return false;
}
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