-(void) genVerticesTunnel{
    int i=0;
    int depth = 5;
    int revolutions = 5;
    double delta_x = 360.0 / (double)depth;
    double delta_y = 1.0;

    for (int y=0; y <revolutions; y++){
        for (int x=0; x<depth; x++){

            //position
            VerticesTunnel[i + 0] = (float)sin(GLKMathDegreesToRadians((double)x*delta_x));
            NSLog(@"HALLO");
            NSLog(@"%f",VerticesTunnel[i]);
            VerticesTunnel[i + 1] = (float)cos(GLKMathDegreesToRadians((double)x*delta_x));
            VerticesTunnel[i + 2] = (float)-(y * delta_y);
            //colors RGBA
            VerticesTunnel[i + 3] = 1.0;
            VerticesTunnel[i + 4] = 0.0;
            VerticesTunnel[i + 5] = 0.0;
            VerticesTunnel[i + 6] = 1.0;
            //TexCoord
            VerticesTunnel[i + 7] = (float)x * 1.0f / (float)revolutions;
            VerticesTunnel[i + 8] = (float)y * 1.0f / (float)depth;
            //Normal
            VerticesTunnel[i + 9] = 1.0;
            VerticesTunnel[i + 10] = 1.0;
            VerticesTunnel[i + 11] = 1.0;

            i += 12;
        }
    }
}