23 lines
537 B
Forth
23 lines
537 B
Forth
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// version 120 is needed for gl_PointCoord
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#version 120
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uniform vec4 uniform_color;
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uniform float percent_outline_radius;
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uniform float percent_center_radius;
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vec4 calc_color(float radius, vec4 color)
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{
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return ((radius < percent_center_radius) || (radius > 1.0 - percent_outline_radius)) ?
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vec4(0.5 * color.rgb, color.a) : color;
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}
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void main()
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{
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vec2 pos = (gl_PointCoord - 0.5) * 2.0;
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float radius = length(pos);
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if (radius > 1.0)
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discard;
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gl_FragColor = calc_color(radius, uniform_color);
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}
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