Can one compare a value to zero?

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Can one compare a value to zero? #98079 11/09/06 03:12 11/09/06 03:12
Joined: Oct 2003 Posts: 49 D dirkmittler OP Newbie
dirkmittler OP Newbie D Joined: Oct 2003 Posts: 49	I'm sorry if this question seems naive. I don't have much experience with fx files. But I'm writing a programmed shader, in which I need to determine at run-time, if the value of r0 equals zero. If so, I'd appreciate an output of -1 or something like that, REGARDLESS of what r0 used to be. Is there an asm instruction I failed to look up? Dirk

Re: Can one compare a value to zero? [Re: dirkmittler] #98080 11/09/06 07:33 11/09/06 07:33
Joined: Oct 2003 Posts: 4,131 M Matt_Aufderheide Expert
Matt_Aufderheide Expert M Joined: Oct 2003 Posts: 4,131	use HLSL! Sphere Engine--the premier A6 graphics plugin.

Re: Can one compare a value to zero? [Re: dirkmittler] #98081 11/09/06 08:06 11/09/06 08:06
Joined: Oct 2002 Posts: 8,939 planet.earth ello Senior Expert
ello Senior Expert Joined: Oct 2002 Posts: 8,939 planet.earth	look here search the site by "cmp" there is an example showing how to do branching if a value is 0.0

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