pointmarker.geom

#version 330
 
/*
 *  Copyright (C) 2010 - 2016 Leonid Kostrykin
 *
 *  Chair of Medical Engineering (mediTEC)
 *  RWTH Aachen University
 *  Pauwelsstr. 20
 *  52074 Aachen
 *  Germany
 * 
 * 
 *  Copyright (C) 2021 - 2025 Leonid Kostrykin
 * 
 */
 
uniform vec4 color;
uniform float pointSize;
 
layout( points ) in;
layout( points, max_vertices = 2 ) out;
 
out vec4 fragColor;
 
 
// ----------------------------------------------------------------------------------
// Geometry Procedure
// ----------------------------------------------------------------------------------
 
void main()
{
    gl_Position = gl_in[ 0 ].gl_Position;
    gl_PointSize = pointSize + 2;
    fragColor = vec4( 1, 1, 1, color.a );
    EmitVertex();
    EndPrimitive();
    
    gl_Position = gl_in[ 0 ].gl_Position;
    gl_PointSize = pointSize;
    fragColor = color;
    EmitVertex();
    EndPrimitive();
}