@thi.ng/shader-ast/ast/item.js

DSL to define shader code in TypeScript and cross-compile to GLSL, JS and other targets

import { bool, float, int, uint, vec2, vec3, vec4 } from "./lit.js";
const itemType = (type) => type.replace("[]", "");
const numberWithMatchingType = (t, x) => {
  const id = t.type[0];
  return id === "i" ? int(x) : id === "u" ? uint(x) : id === "b" ? bool(x) : float(x);
};
const matchingPrimFor = (t, x) => {
  const ctor = { vec2, vec3, vec4 }[t.type];
  return ctor ? ctor(x) : x;
};
const matchingBoolType = (t) => ({
  float: "bool",
  int: "bool",
  uint: "bool",
  vec2: "bvec2",
  ivec2: "bvec2",
  uvec2: "bvec2",
  vec3: "bvec3",
  ivec3: "bvec3",
  uvec3: "bvec3",
  vec4: "bvec4",
  ivec4: "bvec4",
  uvec4: "bvec4"
})[t.type];
export {
  itemType,
  matchingBoolType,
  matchingPrimFor,
  numberWithMatchingType
};