LYGIA Shader Library

raysSDF (lygia/sdf/raysSDF)

Returns a sdf for rays with N branches

Dependencies:

Use:

raysSDF(<vec2> st, <int> N)

Check it on Github



#ifndef FNC_RAYSSDF
#define FNC_RAYSSDF
float raysSDF(in vec2 st, in int N) {
#ifdef CENTER_2D
    st -= CENTER_2D;
#else
    st -= 0.5;
#endif
    return fract(atan(st.y, st.x) / TAU * float(N));
}
#endif

Dependencies:

Use:

raysSDF(<float2> st, <int> N)

Check it on Github



#ifndef FNC_RAYSSDF
#define FNC_RAYSSDF
float raysSDF(in vec2 st, in int N) {
#ifdef CENTER_2D
    st -= CENTER_2D;
#else
    st -= 0.5;
#endif
    return frac(atan2(st.y, st.x) / TAU * float(N));
}
#endif

Examples

License

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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