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Re: "const mat4" - glsl-crash; bug in TPPStreamCompiler::getNewConstantSourceVar() ?
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Re: "const mat4" - glsl-crash; bug in TPPStreamCompiler::getNewConstantSourceVar() ?

This shader-code works on Linux and windows with nvidia and ati
boards but crashes my mac.

Now the funny  part: If i remove the 'const' in front of the mat4
everything works really slow but
at least it works.


Matrices don't really work in Apple's GLSL implementation.  Simple shaders like:

   attribute mat4 model_matrix;

   void main() {
       gl_Position = gl_ModelViewProjectionMatrix *
           model_matrix * gl_Vertex;
   }

or

   #define BATCH_SIZE 4 // 16
   attribute float model_index;
   uniform mat4 model_matrices[BATCH_SIZE];
   uniform vec4 colors[BATCH_SIZE];
   void main() {
       int int_index = int(floor(model_index));
       gl_Position = gl_ModelViewProjectionMatrix *
           model_matrices[int_index] * gl_Vertex;
       gl_FrontColor = colors[int_index];
   }

either don't render correctly, or crash, depending on your precise
video hardware and OS.

I don't know anything in particular about const mat4, but my
experiences lead me to believe that it's not all that likely to work.

-Keith
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References: 


 >"const mat4" - glsl-crash;	bug in TPPStreamCompiler::getNewConstantSourceVar() ? (From: Johannes Behr <email@hidden>)























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