@thi.ng/shader-ast-stdlib/math/cartesian.js

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

import { V3 } from "@thi.ng/shader-ast/api/types";
import { defn, ret } from "@thi.ng/shader-ast/ast/function";
import { vec3 } from "@thi.ng/shader-ast/ast/lit";
import { mul } from "@thi.ng/shader-ast/ast/ops";
import { $x, $y, $z } from "@thi.ng/shader-ast/ast/swizzle";
import { sym } from "@thi.ng/shader-ast/ast/sym";
import { cossin } from "./sincos.js";
const cartesian2 = (v) => cossin($y(v), $x(v));
const cartesian3 = defn(V3, "cartesian3", [V3], (v) => {
  let r;
  let t;
  let p;
  return [
    r = sym($x(v)),
    t = sym(cossin($y(v))),
    p = sym(cossin($z(v))),
    ret(
      vec3(
        mul(mul(r, $x(t)), $x(p)),
        mul(mul(r, $x(t)), $y(p)),
        mul(r, $y(t))
      )
    )
  ];
});
export {
  cartesian2,
  cartesian3
};