32 lines
832 B
GLSL
32 lines
832 B
GLSL
#ifndef VOLUMETRICS
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void node_wireframe(float size, vec2 barycentric, vec3 barycentric_dist, out float fac)
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{
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vec3 barys = barycentric.xyy;
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barys.z = 1.0 - barycentric.x - barycentric.y;
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size *= 0.5;
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vec3 s = step(-size, -barys * barycentric_dist);
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fac = max(s.x, max(s.y, s.z));
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}
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void node_wireframe_screenspace(float size, vec2 barycentric, out float fac)
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{
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vec3 barys = barycentric.xyy;
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barys.z = 1.0 - barycentric.x - barycentric.y;
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size *= (1.0 / 3.0);
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vec3 dx = dFdx(barys);
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vec3 dy = dFdy(barys);
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vec3 deltas = sqrt(dx * dx + dy * dy);
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vec3 s = step(-deltas * size, -barys);
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fac = max(s.x, max(s.y, s.z));
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}
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#else
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/* Stub wireframe because it is not compatible with volumetrics. */
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# define node_wireframe(a, b, c, d) (d = 0.0)
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# define node_wireframe_screenspace(a, b, c) (c = 0.0)
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#endif
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