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24 lines
638 B
GLSL
24 lines
638 B
GLSL
#version 100
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// Input vertex attributes
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attribute vec3 vertexPosition;
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// Input uniform values
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uniform mat4 mvp;
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uniform float currentTime;
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// NOTE: Add your custom variables here
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void main()
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{
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// Unpack data from vertexPosition
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vec2 pos = vertexPosition.xy;
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float period = vertexPosition.z;
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// Calculate final vertex position (jiggle it around a bit horizontally)
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pos += vec2(100.0, 0.0)*sin(period*currentTime);
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gl_Position = mvp*vec4(pos.x, pos.y, 0.0, 1.0);
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// Calculate the screen space size of this particle (also vary it over time)
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gl_PointSize = 10.0 - 5.0*abs(sin(period*currentTime));
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} |