Method multiplyVec3

src/math/Matrices/Matrix.js:1601–1609

* Takes a vector and returns the vector resulting from multiplying. This function is only for 3x3 matrices. * that vector by this matrix from the left. * * This method applies the current 3x3 matrix to a given vector, effectively * transforming the vector using the matrix. The resulting

(multVector, target)

   * }
   */
  multiplyVec3(multVector, target) {
    if (target === undefined) {
      target = multVector.copy();
    }
    target.x = this.row(0).dot(multVector);
    target.y = this.row(1).dot(multVector);
    target.z = this.row(2).dot(multVector);
    return target;
  }

  // ====================
  // PRIVATE