cione-comp-lib/es/node_modules/claygl/src/glmatrix/mat2.mjs

`$ yarn add cione-comp-lib` 或者 `$ npm i cione-comp-lib -S`

import { GLMAT_ARRAY_TYPE } from "./common.mjs";
var mat2 = {};
mat2.create = function() {
  var out = new GLMAT_ARRAY_TYPE(4);
  out[0] = 1;
  out[1] = 0;
  out[2] = 0;
  out[3] = 1;
  return out;
};
mat2.clone = function(a) {
  var out = new GLMAT_ARRAY_TYPE(4);
  out[0] = a[0];
  out[1] = a[1];
  out[2] = a[2];
  out[3] = a[3];
  return out;
};
mat2.copy = function(out, a) {
  out[0] = a[0];
  out[1] = a[1];
  out[2] = a[2];
  out[3] = a[3];
  return out;
};
mat2.identity = function(out) {
  out[0] = 1;
  out[1] = 0;
  out[2] = 0;
  out[3] = 1;
  return out;
};
mat2.transpose = function(out, a) {
  if (out === a) {
    var a1 = a[1];
    out[1] = a[2];
    out[2] = a1;
  } else {
    out[0] = a[0];
    out[1] = a[2];
    out[2] = a[1];
    out[3] = a[3];
  }
  return out;
};
mat2.invert = function(out, a) {
  var a0 = a[0], a1 = a[1], a2 = a[2], a3 = a[3], det = a0 * a3 - a2 * a1;
  if (!det) {
    return null;
  }
  det = 1 / det;
  out[0] = a3 * det;
  out[1] = -a1 * det;
  out[2] = -a2 * det;
  out[3] = a0 * det;
  return out;
};
mat2.adjoint = function(out, a) {
  var a0 = a[0];
  out[0] = a[3];
  out[1] = -a[1];
  out[2] = -a[2];
  out[3] = a0;
  return out;
};
mat2.determinant = function(a) {
  return a[0] * a[3] - a[2] * a[1];
};
mat2.multiply = function(out, a, b) {
  var a0 = a[0], a1 = a[1], a2 = a[2], a3 = a[3];
  var b0 = b[0], b1 = b[1], b2 = b[2], b3 = b[3];
  out[0] = a0 * b0 + a2 * b1;
  out[1] = a1 * b0 + a3 * b1;
  out[2] = a0 * b2 + a2 * b3;
  out[3] = a1 * b2 + a3 * b3;
  return out;
};
mat2.mul = mat2.multiply;
mat2.rotate = function(out, a, rad) {
  var a0 = a[0], a1 = a[1], a2 = a[2], a3 = a[3], s = Math.sin(rad), c = Math.cos(rad);
  out[0] = a0 * c + a2 * s;
  out[1] = a1 * c + a3 * s;
  out[2] = a0 * -s + a2 * c;
  out[3] = a1 * -s + a3 * c;
  return out;
};
mat2.scale = function(out, a, v) {
  var a0 = a[0], a1 = a[1], a2 = a[2], a3 = a[3], v0 = v[0], v1 = v[1];
  out[0] = a0 * v0;
  out[1] = a1 * v0;
  out[2] = a2 * v1;
  out[3] = a3 * v1;
  return out;
};
mat2.frob = function(a) {
  return Math.sqrt(Math.pow(a[0], 2) + Math.pow(a[1], 2) + Math.pow(a[2], 2) + Math.pow(a[3], 2));
};
mat2.LDU = function(L, D, U, a) {
  L[2] = a[2] / a[0];
  U[0] = a[0];
  U[1] = a[1];
  U[3] = a[3] - L[2] * U[1];
  return [L, D, U];
};
var mat2$1 = mat2;
export { mat2$1 as default };