Mike Erwin
5b26c36008
As seen at #bcon16. These were produced quickly and probably need further work. SIMPLE variant draws triangle mesh edges. Based on this research: http://www2.imm.dtu.dk/pubdb/views/edoc_download.php/4884/pdf/imm4884.pdf http://developer.download.nvidia.com/SDK/10/direct3d/Source/SolidWireframe/Doc/SolidWireframe.pdf Non-SIMPLE variant can adjust thickness per edge. This can be used to draw only some edges, or accentuate some edges. Given the right inputs this is a general n-gon perimeter shader. Part of T49165
21 lines
469 B
GLSL
21 lines
469 B
GLSL
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#define SMOOTH 1
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const float transitionWidth = 1.0;
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uniform vec4 fillColor = vec4(0);
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uniform vec4 outlineColor = vec4(0,0,0,1);
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noperspective in vec3 distanceToOutline;
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out vec4 FragColor;
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void main() {
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float edgeness = min(min(distanceToOutline.x, distanceToOutline.y), distanceToOutline.z);
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#if SMOOTH
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FragColor = mix(outlineColor, fillColor, smoothstep(0, transitionWidth, edgeness));
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#else
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FragColor = (edgeness <= 0) ? outlineColor : fillColor;
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#endif
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}
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