KlassischeKeplerKriege/data/shader/particle.vert

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#version 120
attribute vec2 in_vertex;
attribute vec2 in_position;
attribute vec2 in_velocity;
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varying vec2 velocity;
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varying vec2 vertex;
uniform float time;
uniform float size;
void main()
{
vec2 p = size*in_vertex;
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p += log(1.0+time) * in_velocity;
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p += in_position;
gl_Position = vec4(p, 0.0, 1.0);
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vertex = in_vertex;
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velocity = in_velocity;
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}