RE: GL_ARB_FRAGMENT_PROGRAM vs CG_PROFILE_FP30

BTW, I just tested this out, and it appears to work.

I think what is happening with your original code is that "(fc,bc)" is treated as a parenthesized expression that includes a comma operator, which is the C sequential evaluation operator.  This evaluates "fc", then "bc", and the result is simply the scalar "bc".  This gets cast up to a float2 in the assignment.  There probably should be a warning here, and I've filed a bug report.

-----Original Message-----
Sent: Tuesday, March 15, 2005 3:27 PM
To: [email protected]
Cc: Pat Brown (OpenGL)

I think you need to use a constructor to build your vector:

  float2 dependcoor = float2(fc,bc);

Does that fix the problem?

Pat

-----Original Message-----
Sent: Tuesday, March 15, 2005 2:46 PM
To: Multiple recipients of list OPENGL-GAMEDEV-L

Thx.... Stephen


how could this code

const char PCG_CODE[] =
"float4 main(float4 FrontCoords : TEXCOORD0, float4 BackCoords : TEXCOORD1, 
const uniform sampler3D FrontTexture : TEXUNIT0, const uniform sampler3D 
BackTexture : TEXUNIT1, const uniform sampler2D DependentTexture : 
TEXUNIT2): COLOR\n\
{\n\
 float4 OUT;\n\
  float fc,bc;\n\
  fc = tex3D(FrontTexture, FrontCoords).r;\n\
  bc = tex3D(BackTexture, BackCoords).r;\n\
  float2 dependcoor = (fc,bc);\n\
  OUT = f4tex2D(DependentTexture, dependcoor);\n\
 return OUT;\n\
}";

generates this crap code???...


!!FP1.0
# cgc version 1.3.0001, build date Jan  7 2005 14:01:35
# command line args: -q -profile fp30 -entry main
#vendor NVIDIA Corporation
#version 1.0.02
#profile fp30
#program main
#semantic main.FrontTexture : TEXUNIT0
#semantic main.BackTexture : TEXUNIT1
#semantic main.DependentTexture : TEXUNIT2
#var float4 FrontCoords : $vin.TEX0 : TEX0 : 0 : 1
#var float4 BackCoords : $vin.TEX1 : TEX1 : 1 : 1
#var sampler3D FrontTexture : TEXUNIT0 : texunit 0 : 2 : 1
#var sampler3D BackTexture : TEXUNIT1 : texunit 1 : 3 : 1
#var sampler2D DependentTexture : TEXUNIT2 : texunit 2 : 4 : 1
#var float4 main : $vout.COL : COL : -1 : 1
TEX   R0.x, f[TEX1], TEX1, 3D;
TEX   o[COLR], R0.x, TEX2, 2D;
END
# 2 instructions, 1 R-regs, 0 H-regs


We r crear the they are not equivalents...
Now, how to fix it?...
I prefer the compiler says "error" instead of give me this crap code... and 
running it... It think, I am not using the commands properly...
THX
Mr. RIX



----- Original Message ----- 
To: "Multiple recipients of list OPENGL-GAMEDEV-L" 
<[email protected]>
Sent: Tuesday, March 15, 2005 10:11 AM


> Rhadamés Carmona wrote:
>> Hello Guy
>>
>> I tested arb_fragment program and CG fragment program, and the results 
>> are not the same. I kept the rest of the code. CG looks darker. Any 
>> clue?. I am using pre-integration volume rendering with 3D textures. 
>> Texture0 and 1 are the same source 3D texture... texture2 is the 
>> dependent 2D texture.
>
> Have you compiled the Cg code with the stand-alone compiler and looked at
> the machine-code it generates?  I'm sure that would give you a clue.
>
> -----------------------------------------------------------------------
> The second law of Frisbee throwing states: "Never precede any maneuver
> by a comment more predictive than "Watch this!"...it turns out that
> this also applies to writing Fragment Shaders.
> -----------------------------------------------------------------------
> Steve Baker                      (817)619-2657 (Vox/Vox-Mail)
> L3Com/Link Simulation & Training (817)619-2466 (Fax)
> Work: [email protected]           http://www.link.com
> Home: [email protected]       http://www.sjbaker.org
>
> ----- 
> FAQ and OpenGL Resources at:
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>
> -- 
> Author: Stephen J Baker
>  INET: [email protected]
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