@thi.ng/shader-ast-stdlib/matrix/convert.js

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

import { M2, M3, M4 } from "@thi.ng/shader-ast/api/types";
import { defn, ret } from "@thi.ng/shader-ast/ast/function";
import { indexMat } from "@thi.ng/shader-ast/ast/indexed";
import { VEC3_0, mat3, mat4, vec3, vec4 } from "@thi.ng/shader-ast/ast/lit";
const m22ToM33 = defn(M3, "m22ToM33", [M2], (m) => {
  return [
    ret(mat3(vec3(indexMat(m, 0), 0), vec3(indexMat(m, 1), 0), VEC3_0))
  ];
});
const m33ToM44 = defn(M4, "m33ToM44", [M3], (m) => {
  return [
    ret(
      mat4(
        vec4(indexMat(m, 0), 0),
        vec4(indexMat(m, 1), 0),
        vec4(indexMat(m, 2), 0),
        vec4()
      )
    )
  ];
});
export {
  m22ToM33,
  m33ToM44
};