26 lines
744 B
GLSL
26 lines
744 B
GLSL
#include "triSDF.glsl"
|
|
#include "../space/scale.glsl"
|
|
|
|
/*
|
|
contributors: Patricio Gonzalez Vivo
|
|
description: Returns a rhomb-shaped sdf
|
|
use: rhombSDF(<vec2> st)
|
|
examples:
|
|
- https://raw.githubusercontent.com/patriciogonzalezvivo/lygia_examples/main/draw_shapes.frag
|
|
license:
|
|
- Copyright (c) 2021 Patricio Gonzalez Vivo under Prosperity License - https://prosperitylicense.com/versions/3.0.0
|
|
- Copyright (c) 2021 Patricio Gonzalez Vivo under Patron License - https://lygia.xyz/license
|
|
*/
|
|
|
|
#ifndef FNC_RHOMBSDF
|
|
#define FNC_RHOMBSDF
|
|
float rhombSDF(in vec2 st) {
|
|
float offset = 1.0;
|
|
#ifdef CENTER_2D
|
|
offset = CENTER_2D.y * 2.0;
|
|
#endif
|
|
return max(triSDF(st),
|
|
triSDF(vec2(st.x, offset-st.y)));
|
|
|
|
}
|
|
#endif
|