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Added zoom independent sharp edges to the SDF text example.

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Stephan Soller 2021-04-18 16:31:48 +02:00
parent 2ad3eb1d57
commit 1cb32ff8a2
1 changed files with 3 additions and 3 deletions
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6
examples/text/resources/shaders/glsl330/sdf.fs
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@ -12,14 +12,14 @@ uniform vec4 colDiffuse;
out vec4 finalColor;
// NOTE: Add here your custom variables
const float smoothing = 1.0/16.0;
void main()
{
// Texel color fetching from texture sampler
// NOTE: Calculate alpha using signed distance field (SDF)
float distance = texture(texture0, fragTexCoord).a;
float alpha = smoothstep(0.5 - smoothing, 0.5 + smoothing, distance);
float distanceFromOutline = texture(texture0, fragTexCoord).a - 0.5;
float distanceChangePerFragment = length(vec2(dFdx(distanceFromOutline), dFdy(distanceFromOutline)));
float alpha = smoothstep(-distanceChangePerFragment, distanceChangePerFragment, distanceFromOutline);
// Calculate final fragment color
finalColor = vec4(fragColor.rgb, fragColor.a*alpha);