lygia/sdf/flowerSDF)Returns a flower shaped SDF
Use:
flowerSDF(<vec2> st, <int> n_sides)
#ifndef FNC_FLOWERSDF
#define FNC_FLOWERSDF
float flowerSDF(vec2 st, int N) {
#ifdef CENTER_2D
st -= CENTER_2D;
#else
st -= 0.5;
#endif
st *= 4.0;
float r = length(st) * 2.0;
float a = atan(st.y, st.x);
float v = float(N) * 0.5;
return 1.0 - (abs(cos(a * v)) * 0.5 + 0.5) / r;
}
#endif
Use:
flowerSDF(<float2> st, <int> n_sides)
#ifndef FNC_FLOWERSDF
#define FNC_FLOWERSDF
float flowerSDF(vec2 st, int N) {
#ifdef CENTER_2D
st -= CENTER_2D;
#else
st -= 0.5;
#endif
st *= 4.0;
float r = length(st) * 2.0;
float a = atan2(st.y, st.x);
float v = float(N) * 0.5;
return 1.0 - (abs(cos(a * v)) * 0.5 + 0.5) / r;
}
#endif
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