Trying something like that given below to map the texture to different objects. The rest of the code can remain the same. I hope it makes things a little clearer.

shader.vert:

varying vec2 Pos;

void main() {

// Set the position of the current vertex
gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;

Pos = vec2(gl_Vertex.x, gl_Vertex.y);

}

shader.frag:

uniform sampler2D color_texture;
varying vec2 Pos;

void main() {
// Set the output color of our current pixel
gl_FragColor = texture2D(color_texture, Pos);
}

I wrote a class-based image loader, but I have many problems with that.

First, it loads the RAW file with its parameters, but if I run my program I just see a blank white screen.

Second, if I don’t set the parameters of the bitmap outside of the load-function, every parameters will be 0.

Here is the code:

// ctexture.h

#include
#include

using namespace std;

class CTexture
{
public:
int Load(char* Filename, int Width, int Height);
void SetActive();
void Delete();
unsigned int GetID();
int Width;
int Height;
unsigned int ID;
int GetWidth();
int GetHeight();
private:
GLuint Texture;
unsigned char* Data;
};

int CTexture::Load(char* Filename, int Width, int Height)
{
FILE* File;
File=fopen(Filename,”rb”);
Data=(unsigned char*)malloc(Width*Height*3);
fread(Data,Width*Height*3,1,File);
fclose(File);
glGenTextures(1,&Texture);
glBindTexture(GL_TEXTURE_2D,Texture);
glTexEnvf(GL_TEXTURE_ENV,GL_TEXTURE_ENV_MODE,GL_MODULATE);
glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D,0,GL_RGB,Width,Height,0,GL_RGB,GL_UNSIGNED_BYTE,Data);
free(Data);
return Texture;
}

void CTexture::SetActive()
{
glBindTexture(GL_TEXTURE_2D,ID);
}

void CTexture::Delete()
{
glDeleteTextures(1,&ID);
}

unsigned int CTexture::GetID()
{
return ID;
}

int CTexture::GetWidth()
{
return Width;
}

int CTexture::GetHeight()
{
return Height;
}

// main.cpp

#include
#include
#include
#include
#include

using namespace std;

CTexture Default;

GLvoid InitTextures(GLvoid)
{
glEnable(GL_TEXTURE_2D);
Default.Width=256;
Default.Height=256;
Default.ID=34;
Default.Load(“default.raw”,Default.Width,Default.Height);
cout<<"Image width is: "<<Default.Width<<endl;
cout<<"Image height is: "<<Default.Height<<endl;
cout<<"ID: "<<Default.ID<<endl;
}

void Display(void)
{
InitTextures();
glClearColor(0.0f,0.0f,0.0f,0.0f);
glClear(GL_COLOR_BUFFER_BIT);
Default.SetActive();
glBegin(GL_QUADS);
glTexCoord2f(0.0f,0.0f); glVertex2f(-1.0f,1.0f);
glTexCoord2f(1.0f,0.0f); glVertex2f(1.0f,1.0f);
glTexCoord2f(1.0f,1.0f); glVertex2f(1.0f,-1.0f);
glTexCoord2f(0.0f,1.0f); glVertex2f(-1.0f,-1.0f);
glEnd();
glFlush();
}

int main(int argc,char** argv)
{
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_SINGLE);
glutCreateWindow("OpenGL");
glutDisplayFunc(Display);
glutMainLoop();
}

Otherwise, I use Microsoft Visual C++ 2008 for programming.

I don't know what is the problem.

Thank you very much!

Btw, started learning opengl here. Now I have an ios app out. Check out “Fission HD” on YouTube. Thanks