Method #transpose4x4

src/math/Matrices/Matrix.js:1792–1845

* transpose according to a given matrix * @param {p5.Matrix|Float32Array|Number[]} a the matrix to be * based on to transpose * @private * @chainable

(a)

   * @chainable
   */
  #transpose4x4(a) {
    console.log('====> 4x4');
    let a01, a02, a03, a12, a13, a23;
    if (a instanceof Matrix) {
      a01 = a.matrix[1];
      a02 = a.matrix[2];
      a03 = a.matrix[3];
      a12 = a.matrix[6];
      a13 = a.matrix[7];
      a23 = a.matrix[11];

      this.matrix[0] = a.matrix[0];
      this.matrix[1] = a.matrix[4];
      this.matrix[2] = a.matrix[8];
      this.matrix[3] = a.matrix[12];
      this.matrix[4] = a01;
      this.matrix[5] = a.matrix[5];
      this.matrix[6] = a.matrix[9];
      this.matrix[7] = a.matrix[13];
      this.matrix[8] = a02;
      this.matrix[9] = a12;
      this.matrix[10] = a.matrix[10];
      this.matrix[11] = a.matrix[14];
      this.matrix[12] = a03;
      this.matrix[13] = a13;
      this.matrix[14] = a23;
      this.matrix[15] = a.matrix[15];
    } else if (isMatrixArray(a)) {
      a01 = a[1];
      a02 = a[2];
      a03 = a[3];
      a12 = a[6];
      a13 = a[7];
      a23 = a[11];

      this.matrix[0] = a[0];
      this.matrix[1] = a[4];
      this.matrix[2] = a[8];
      this.matrix[3] = a[12];
      this.matrix[4] = a01;
      this.matrix[5] = a[5];
      this.matrix[6] = a[9];
      this.matrix[7] = a[13];
      this.matrix[8] = a02;
      this.matrix[9] = a12;
      this.matrix[10] = a[10];
      this.matrix[11] = a[14];
      this.matrix[12] = a03;
      this.matrix[13] = a13;
      this.matrix[14] = a23;
      this.matrix[15] = a[15];
    }
    return this;
  }

  /**
   * This function is only for 3x3 matrices.