Hi Sebastian,
SMesserschmidt wrote:
> 1. Is the shader really set to the correct state set? Try some simple
> non-geometry shader to see if it is working in general.
I commented line 29 in the .cpp file that adds the geometry shader to the
program, and a red point was displayed in the centre of the screen, so that's
that.
SMesserschmidt wrote:
> 2. Are there errors when using the shader? Some drivers don't produce an
> error if the passed primitive doesn't match the geometry-shader type.
>
> Check the output of the console and try a less complicated shader to see
> where it fails.
The shaders compile and link fine (including the geometry shader) but as I said
there is no output. I tried replacing my current geometry shader with a simpler
"pass-through" shader (code below), which worked and I can now see a red point
in the centre of the window.
Code:
#version 330
layout(points) in;
layout(points) out;
in vec4 vPosition[1];
uniform mat4 ModelviewProjection;
void main()
{
gl_Position = ModelviewProjection * vPosition[0];
EmitVertex();
}
So obviously there is something wrong with either the geometry shader or my C++
code, any ideas?
Cheers,
Ahmed
------------------
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http://forum.openscenegraph.org/viewtopic.php?p=61076#61076
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