This system adds the code necessary for letting content creators specify
complex events by specifying a simple, program-like sequence of
operations that will be executed by the engine when a certain event is
triggered.
This works around the Windows only limitation where the standard random
function only returns up to 2^15 which limits how many vertices in the
model can be picked.
Since we already have a function that handles this properly and returns
values in the entire integer range, using that fixes that low limit.
Since instance-specific fields have been moved to polymodel_instance and submodel_instance, the gun_submodel_rotation field should also be moved. This is also reworked a bit to keeping track of the rotation via the normal submodel instance angles.
This removes an unnecessary look_at field as well.
Since angles are no longer written in three redundant places, the temporary hijacking of the turret angles in `model_make_turret_matrix` was overwriting the turret's proper position. So this PR just saves the angles and restores them when the calculation is done.
Just for sanity's sake. This just displays a Warning without modifying the dockpoint name. I considered an nprintf but figured a Warning was more appropriate.
Retail has a hud_find_target_distance function that returns the distance between the player position and a bounding box. This is useful for the HUD because it shows the distance to the perimeter of an object like a jump node or a large ship. However, this function was re-used for the `distance` SEXP, resulting in the awkward situation where the distance is measured from one ship's center to another ship's bounding box. This can lead to unexpected results and it also means that the SEXP returns a different distance when the arguments are swapped.
This PR deprecates the original SEXP and introduces the new SEXPs `center-distance` and `bbox-distance` which use consistent methods for both ships. It also renames the `distance-ship-subystem` SEXP to `center-distance-subsystem` and adds a new `bbox-distance-subsystem` SEXP.
Having recalled that other SCP folks stated pow shoud not be used to do simple squaring, I figured it might be a good idea to update the two instances I found where that was the case.
asarium