Re: Printing problems on Intel

[James W. W. <os...@jw...>]

On Feb 23, 2007, at 5:39 AM, Roger Holmes wrote:

> I have been looking into the problems we are having with printing
> with the Interactive Renderer on Intel. If I manually push the Hither
> clipping plane forward then most, if not all of the problems go away.
>
> Is there a difference between the Z buffer on Intel and PowerPC?

Not that I know of.  But it may make a difference which Intel Mac  
you're talking about.  The "Pro" models have decent video cards,  
while the cheaper models have the Intel video with no VRAM.

Could you be more explicit about the nature of the problem with  
printing?  Maybe print to PDF and post the PDF somewhere?

> I half remember that the Z Buffer used to default to 16 bit depth,
> and that we ask Quesa to use 32 bits instead. Or was the default
> changed?

Quesa asks for 32.  The default might depend on the video card, I'm  
not sure.

> Has OpenGL moved on to using a floating point Z buffer
> on Intel? If so can we use 64 bit doubles?
>
> Is there a call to set the Z depth? What is it called?

TQ3Uns32	 requestedBitDepth = 32;
Q3Object_AddElement( rendererObject, kQ3ElementTypeDepthBits,
		& requestedBitDepth );