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

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

import { isNumber } from "@thi.ng/checks/is-number";
import {
  F,
  V2,
  V3,
  V4
} from "../api/types.js";
import { int } from "./lit.js";
const index = (val, id) => ({
  tag: "idx",
  type: val.type.substring(0, val.type.length - 2),
  id: isNumber(id) ? int(id) : id,
  val
});
const MAT_VEC = {
  mat2: V2,
  mat3: V3,
  mat4: V4
  // mat23: "vec3",
  // mat24: "vec4",
  // mat32: "vec2",
  // mat34: "vec4",
  // mat42: "vec2",
  // mat43: "vec3",
};
function indexMat(m, a, b) {
  const idx = {
    tag: "idxm",
    type: MAT_VEC[m.type],
    id: int(a),
    val: m
  };
  return b !== void 0 ? { tag: "idx", type: F, id: int(b), val: idx } : idx;
}
export {
  index,
  indexMat
};