Re: HLSL distance function

Dean — Fri, 07 Aug 2009 18:34:56 GMT

Not sure if you are still having issues. But from the looks of your code you are expecting the distance function to return a float3 when it only returns a float for the distance. http://msdn.microsoft.com/en-us/library/bb509592(VS.85).aspx

HLSL distance function

mghoffmann — Fri, 26 Jun 2009 20:59:17 GMT

Hi, I'm a long time reader, first time poster in these forums so please forgive me if this post is in the wrong section.

I've been having a problem with the HLSL distance function in my pixel shader.

Here is my code:

float3 Dist = distance(LightSource.xyz, In.AimDirection.xyz);
And here's my exception message:

Error 1 Errors compiling C:\Users\Public\Michael's Projects\XNA\Game\Game\Content\SkyBox.fx:
C:\Users\Public\Michael's Projects\XNA\Game\Game\Content\SkyBox.fx(35): warning X4707: texcoord inputs used directly (that is, other than sampling from textures) in shader body in ps_1_1 are always clamped from 0 to 1
C:\Users\Public\Michael's Projects\XNA\Game\Game\Content\SkyBox.fx(35): error X4532: cannot map expression to pixel shader instruction set
C:\Users\Public\Michael's Projects\XNA\Game\Game\Content\SkyBox.fx(46): ID3DXEffectCompiler::CompileEffect: There was an error compiling expression
ID3DXEffectCompiler: Compilation failed C:\Users\Public\Michael's Projects\XNA\Game\Game\Content\SkyBox.fx 35 1

I have no idea what that whole texcoord stuff is about...
Thanks in advance for any help.

--Michael

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Re: HLSL distance function

HLSL distance function