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

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

import { F, V2, V3 } from "@thi.ng/shader-ast/api/types";
import { defn, ret } from "@thi.ng/shader-ast/ast/function";
import { div, mul, sub } from "@thi.ng/shader-ast/ast/ops";
import { sym } from "@thi.ng/shader-ast/ast/sym";
import { dot, length } from "@thi.ng/shader-ast/builtin/math";
import { clamp01 } from "../math/clamp.js";
const $ = (n, type) => defn(F, `sdLine${n}`, [type, type, type], (p, a, b) => {
  let pa, ba;
  return [
    pa = sym(sub(p, a)),
    ba = sym(sub(b, a)),
    ret(
      length(sub(pa, mul(ba, clamp01(div(dot(pa, ba), dot(ba, ba))))))
    )
  ];
});
const sdfLine2 = $(2, V2);
const sdfLine3 = $(3, V3);
export {
  sdfLine2,
  sdfLine3
};