#version 430
uniform float offset;
void main(void)
{
	if (gl_VertexID == 0) gl_Position = vec4(0.25 + sin(offset), -0.25+0.5*cos(offset), 0.0, 1.0);
	else if (gl_VertexID == 1) gl_Position = vec4(-0.25 + sin(offset), -0.25+0.5*cos(offset),0.0,1.0);
	else gl_Position = vec4(0.25 + sin(offset), 0.25+0.5*cos(offset), 0.0, 1.0);
}