getComponent method

double getComponent(int index)

• index - 0, 1 or 2.

• If index equals 0 returns the x value.

• If index equals 1 returns the y value.

• If index equals 2 returns the z value.

Implementation

double getComponent(int index) {
  switch (index) {
    case 0:
      return x;
    case 1:
      return y;
    case 2:
      return z;
    default:
      throw ('index is out of range: $index');
  }
}