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Old 02-15-2012, 08:30 AM
Andy Andy is offline
Join Date: Mar 2008
Location: Germany
Posts: 36
geometryshader parameters

I want to use a simple geometry shader. How can I set the GEOMETRY_INPUT_TYPE_ARB, GL_GEOMETRY_OUTPUT_TYPE_ARB and GL_GEOMETRY_VERTICES_OUT_ARB parameters?

#version 120
#extension GL_ARB_geometry_shader4 : enable
//output GL_LINE_STRIP
varying in vec4 V[3];
varying in vec3 N[3];
uniform float nLength;
void createNormal( vec3 V, vec3 N )
    gl_Position = gl_ModelViewProjectionMatrix * vec4( V, 1.0f );
    gl_Position = gl_ModelViewProjectionMatrix * vec4( V + N * nLength, 1.0f );
void main()
    for ( int i = 0; i < 3; ++i )
        createNormal( V[i].xyz, N[i] );
Any idear?
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