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void readCubeMapToHost_forTest(unsigned int cubeMapTexture, int width, int height, GLubyte *dataMap){	GLuint CarrierFBo;	glGenFramebuffers(1, &CarrierFBo);	glBindFramebuffer(GL_FRAMEBUFFER, CarrierFBo);	//cout << "here 1" << endl;	glBindTexture(GL_TEXTURE_CUBE_MAP, cubeMapTexture);	for (int i = 0; i < 6; i++)	{		//cout << "here 2" << endl;		//貌似是必须的，不然只能读取POSITIVE_X		glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, cubeMapTexture, 0);		//cout << "here 3" << endl;		glGetTexImage(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, &dataMap[i*width*height]);	}	//cout << "here 4" << endl;	glBindTexture(GL_TEXTURE_2D, 0);	glBindFramebuffer(GL_FRAMEBUFFER, 0);}int bmp_write_forTest(unsigned char *image, int xsize, int ysize, char *filename){#define BMP_Header_Length 54	FILE*    pDummyFile;	FILE*    pWritingFile;	GLubyte* pPixelData;	GLubyte  BMP_Header[BMP_Header_Length];	GLint    i, j;	GLint    PixelDataLength;	i = xsize * 3;	while (i % 4 != 0)		++i;	PixelDataLength = i * ysize;	unsigned char * grayimage = (unsigned char *)malloc(sizeof(unsigned char)*xsize*ysize * 3);	/*unsigned char f2c = (unsigned char)0.5f;*/	for (int i = 0; i
   
    cubeMapTexture);}
   

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