27 lines
781 B
GLSL
27 lines
781 B
GLSL
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in vec4 finalColor;
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layout(location = 0) out vec4 fragColor;
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layout(location = 1) out vec4 lineOutput;
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void main()
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{
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vec2 uv = gl_PointCoord - vec2(0.5);
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float dist = length(uv);
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if (dist > 0.5) {
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discard;
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}
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/* Nice sphere falloff. */
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float intensity = sqrt(1.0 - dist * 2.0) * 0.5 + 0.5;
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fragColor = finalColor * vec4(intensity, intensity, intensity, 1.0);
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/* The default value of GL_POINT_SPRITE_COORD_ORIGIN is GL_UPPER_LEFT. Need to reverse the Y. */
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uv.y = -uv.y;
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/* Subtract distance to outer edge of the circle. (0.75 is manually tweaked to look better) */
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vec2 edge_pos = gl_FragCoord.xy - uv * (0.75 / (dist + 1e-9));
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vec2 edge_start = edge_pos + vec2(-uv.y, uv.x);
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lineOutput = pack_line_data(gl_FragCoord.xy, edge_start, edge_pos);
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}
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