| camera | Camera to use. |
| near | The corners of the near plane. (A minimum size of 4 elements is required.) |
| far | The corners of the far plane. (A minimum size of 4 elements is required.) |
| frustumAspect | The aspect ratio of the frustrum. |
bool Whether the frustrum was calculated.
Calculate the frustrum corners.
Corners are calculated in this order: left bottom, left top, right top, right bottom.