LYGIA Shader Library

stroke (lygia/draw/stroke)

Fill a stroke in a SDF. From PixelSpiritDeck https://github.com/patriciogonzalezvivo/PixelSpiritDeck

Dependencies:

Use:

stroke(<float> sdf, <float> size, <float> width [, <float> edge])

Check it on Github


#ifndef FNC_STROKE
#define FNC_STROKE


float stroke(float x, float size, float w) {
    float d = aastep(size, x + w * 0.5) - aastep(size, x - w * 0.5);
    return saturate(d);
}

float stroke(float x, float size, float w, float edge) {
    float d = smoothstep(size - edge, size + edge, x + w * 0.5) - smoothstep(size - edge, size + edge, x - w * 0.5);
    return saturate(d);
}

#endif

Dependencies:

Use:

stroke(<float> sdf, <float> size, <float> width [, <float> edge])

Check it on Github


#ifndef FNC_STROKE
#define FNC_STROKE


float stroke(float x, float size, float w) {
    float d = aastep(size, x + w * 0.5) - aastep(size, x - w * 0.5);
    return saturate(d);
}

float stroke(float x, float size, float w, float edge) {
    float d = smoothstep(size - edge, size + edge, x + w * 0.5) - smoothstep(size - edge, size + edge, x - w * 0.5);
    return saturate(d);
}

#endif

Dependencies:

Use:

stroke(<float> sdf, <float> size, <float> width [, <float> edge])

Check it on Github


#ifndef FNC_STROKE
#define FNC_STROKE


float stroke(float x, float size, float w) {
    float d = aastep(size, x + w * 0.5) - aastep(size, x - w * 0.5);
    return saturate(d);
}

float stroke(float x, float size, float w, float edge) {
    float d = smoothstep(size - edge, size + edge, x + w * 0.5) - smoothstep(size - edge, size + edge, x - w * 0.5);
    return saturate(d);
}

#endif

Use:

stroke(<float> sdf, <float> size, <float> width [, <float> edge])

Check it on Github


fn stroke(x: f32, size: f32, w: f32, edge: f32) -> f32 {
    return saturate(smoothstep(size - edge, size + edge, x + w * 0.5) - smoothstep(size - edge, size + edge, x - w * 0.5));
}

Licenses

LYGIA is dual-licensed under the Prosperity License and the Patron License for sponsors and contributors.

Sponsors and contributors are automatically added to the Patron License and they can ignore the any non-commercial rule of the Prosperity Licensed software (please take a look to the exception).

It's also possible to get a permanent comercial license hook to a single and specific version of LYGIA.

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