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PopcornKing
12-06-2003, 05:16 PM
I was hoping someone could help me understand (or at least agree with me) why I am having problems using a dynamic array with glDrawPixels. I have no problem with glDrawPixels when declaring a static 3d array with predefined dimensions. Is the reason I sometimes get a null reference due to the fact that my dynamic "array" isnt necessarily contiguous whereas the static predefined one is?

Here is my code...

class FrameBuffer
{
public:
FrameBuffer(int,int,int);
FrameBuffer();
~FrameBuffer();
GLfloat*** theBuffer;
int length,width,depth;
};

FrameBuffer::FrameBuffer(int x, int y, int colors)
{
width = x;
length = y;
depth = colors;
theBuffer = new GLfloat**[x];
for(int i = 0; i < width; i++)
{
theBuffer[i] = new GLfloat*[y];
for(int j = 0; j < length; j++)
{
theBuffer[i][j] = new GLfloat[depth];
for(int k = 0; k < depth; k++)
theBuffer[i][j][k] = 0.0f;

}
}
}

Bob
12-07-2003, 02:37 AM
Just like you say, it's becuase a tripple pointer is not a contiguous memory block. Allocate the whole image in one allocation instead, and make it a single pointer.