27 lines
779 B
Forth
27 lines
779 B
Forth
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#version 330
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// Input vertex attributes (from vertex shader)
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in vec2 fragTexCoord;
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in vec4 fragColor;
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// Input uniform values
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uniform sampler2D texture0;
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uniform vec4 colDiffuse;
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// Output fragment color
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out vec4 finalColor;
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// NOTE: Add here your custom variables
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void main()
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{
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// Texel color fetching from texture sampler
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// NOTE: Calculate alpha using signed distance field (SDF)
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float distanceFromOutline = texture(texture0, fragTexCoord).a - 0.5;
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float distanceChangePerFragment = length(vec2(dFdx(distanceFromOutline), dFdy(distanceFromOutline)));
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float alpha = smoothstep(-distanceChangePerFragment, distanceChangePerFragment, distanceFromOutline);
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// Calculate final fragment color
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finalColor = vec4(fragColor.rgb, fragColor.a*alpha);
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}
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