gltut / Tut 03 OpenGLs Moving Triangle / data / calcOffset.vert

#version 330

layout(location = 0) in vec4 position;
uniform float loopDuration;
uniform float time;

void main()
	float timeScale = 3.14159f * 2.0f / loopDuration;
	float currTime = mod(time, loopDuration);
	vec4 totalOffset = vec4(
		cos(currTime * timeScale) * 0.5f,
		sin(currTime * timeScale) * 0.5f,

	gl_Position = position + totalOffset;
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