lygia/sdf/triSDF)Returns a triangle-shaped sdf
Use:
triSDF(<vec2> st)
#ifndef FNC_TRISDF
#define FNC_TRISDF
float triSDF(in vec2 st) {
#ifdef CENTER_2D
st -= CENTER_2D;
st *= 5.0;
#else
st -= 0.5;
st *= 5.0;
#endif
return max(abs(st.x) * .866025 + st.y * .5, -st.y * 0.5);
}
#endif
Use:
triSDF(<float2> st)
#ifndef FNC_TRISDF
#define FNC_TRISDF
float triSDF(in float2 st) {
#ifdef CENTER_2D
st -= CENTER_2D;
st *= 5.0;
#else
st -= 0.5;
st *= 5.0;
#endif
return max(abs(st.x) * .866025 + st.y * .5, -st.y * 0.5);
}
#endif
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