@thi.ng/shader-ast-stdlib/sdf/mirror.js

Function collection for modular GPGPU / shader programming with @thi.ng/shader-ast

import { V2 } from "@thi.ng/shader-ast/api/types";
import { defn, ret } from "@thi.ng/shader-ast/ast/function";
import { FLOAT05, VEC2_1, VEC2_2 } from "@thi.ng/shader-ast/ast/lit";
import { add, div, mul, sub } from "@thi.ng/shader-ast/ast/ops";
import { sym } from "@thi.ng/shader-ast/ast/sym";
import { floor, mod } from "@thi.ng/shader-ast/builtin/math";
const sdfMirror2 = defn(V2, "sdfMirror2", [V2, V2], (p, size) => {
  let halfSize;
  return [
    halfSize = sym(mul(size, FLOAT05)),
    ret(
      mul(
        sub(mod(add(p, halfSize), size), halfSize),
        sub(
          mul(mod(floor(div(add(p, halfSize), size)), VEC2_2), 2),
          VEC2_1
        )
      )
    )
  ];
});
export {
  sdfMirror2
};