LYGIA Shader Library

circleSDF (lygia/v1.1.4/sdf/circleSDF)

Returns a circle-shaped SDF.

Use:

circleSDF(vec2 st[, vec2 center])

Check it on Github


#ifndef CIRCLESDF_FNC
#define CIRCLESDF_FNC(POS_UV) length(POS_UV)
#endif

#ifndef FNC_CIRCLESDF
#define FNC_CIRCLESDF

float circleSDF(in vec2 st, in vec2 center) {
    return CIRCLESDF_FNC(st - center) * 2.;
}

float circleSDF(in vec2 st) {
    return circleSDF(st, vec2(.5));
}

#endif

Use:

circleSDF(float2 st[, float2 center])

Check it on Github


#ifndef CIRCLESDF_LENGHT_FNC
#define CIRCLESDF_LENGHT_FNC(POS_UV) length(POS_UV)
#endif

#ifndef FNC_CIRCLESDF
#define FNC_CIRCLESDF

float circleSDF(in float2 st, in float2 center) {
    return CIRCLESDF_LENGHT_FNC(st - center) * 2.;
}

float circleSDF(in float2 st) {
    return circleSDF(st, float2(0.5, 0.5));
}

#endif

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

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