Original Post
I''ve been following the NeHe tutorials up to and including the texture mapping section and they work fine. However, I have made several small alterations along the way. The texture mapping tutorial shows how to apply a texture map onto a cube but I want to change it to apply six texture maps - one for each side of the cube. I''m just working with two texture maps for now to see if it works. I have split the program into several files and the texture mapping one looks like this:
#include // Header File For Standard Input/Output
#include
GLuint texture[2]; // Storage For Two Textures
AUX_RGBImageRec *LoadBMP(char *Filename) // Loads A Bitmap Image
{
FILE *File=NULL; // File Handle
if (!Filename) // Make Sure A Filename Was Given
{
return NULL; // If Not Return NULL
}
File=fopen(Filename,"r"); // Check To See If The File Exists
if (File) // Does The File Exist?
{
fclose(File); // Close The Handle
return auxDIBImageLoad(Filename); // Load The Bitmap And Return A Pointer
}
return NULL; // If Load Failed Return NULL
} // End of method AUX_RGBImageRec
int LoadGLTextures() // Load Bitmaps And Convert To Textures
{
const int NumTextures = 2; // The number of textures
int Status = FALSE; // Status Indicator For Texture Loaded/Built
AUX_RGBImageRec *TextureImage[NumTextures]; // Create Storage Space For The Textures
memset(TextureImage,0,sizeof(void *)*1); // Set The Pointer To NULL
// Load The Bitmap, Check For Errors, If Bitmap''s Not Found Quit
if ((TextureImage[0]=LoadBMP("Data/MSG_BJ.bmp")) && (TextureImage[1]=LoadBMP("Data/MSG_BJ_Brit.bmp")))
{
Status = TRUE; // Set The Status To TRUE
glGenTextures(NumTextures, &texture[0]); // Create The Texture
// Typical Texture Generation Using Data From The Bitmap
glBindTexture(GL_TEXTURE_2D, texture[0]);
glBindTexture(GL_TEXTURE_2D, texture[1]);
// Generate The Texture
glTexImage2D(GL_TEXTURE_2D, 0, 3, TextureImage[0]->sizeX, TextureImage[0]->sizeY, 0, GL_RGB, GL_UNSIGNED_BYTE, TextureImage[0]->data);
glTexImage2D(GL_TEXTURE_2D, 0, 3, TextureImage[1]->sizeX, TextureImage[1]->sizeY, 0, GL_RGB, GL_UNSIGNED_BYTE, TextureImage[0]->data);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR); // Linear Filtering
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR); // Linear Filtering
}
// Free up any ram containing bitmap data
for (int count = 0; count < NumTextures; count++)
{
if (TextureImage[count]) // If Texture Exists
{
if (TextureImage[count]->data) // If Texture Image Exists
{
free(TextureImage[count]->data); // Free The Texture Image Memory
}
free(TextureImage[count]); // Free The Image Structure
}
} // End for
return Status; // Return The Status
} // End of method LoadGLTextures
It compiles but when I run it, it says ''Initialisation failed''. It seems to fail on the bit highlighted in bold. I''ve run the debugger and that if statement is false.
Also, is AUX_RGBImageRec *TextureImage[NumTextures]; correct when NumTextures = 2 to create storage space for 2 texture maps? And what about glGenTextures(NumTextures, &texture[0]); ?
