Animation frames/sprites [8] and there relation with voxel data ?

[Skybuck]

It seems each Tile Part for O_FLOOR, O_WESTWALL, O_NORTHWALL, O_OBJECT has 8 animation frames available and possibly associated sprites.

There seems to be only one loft array in MapData and one voxel data array in Tile.

So am I correct in assuming that all 8 animation frames/sprites share the same voxel data ? Or is it possible for each animation from to have it's own voxel data/lofts somehow

I saw that an apple tree can be shot and I believe the voxel data/loft changed for the apple tree. So I assume that somehow the apple tree is replaced by a different MapData which contains different voxel data is this correct ?

Could you also point me towards the code which is responsible for this switcheroo ? I would like to see it.

I am a bit curious to spots in code which somehow changes the voxel/collision logic/data so if you know any other interesting points in code I am all ears.

So far a promising unit to study maybe be TileEngine... it seems to be a utility class and might it changes voxel data/logic here and there... but I suspect there are probably other files/classes that might do much more...

[kevL]

there is only one loftset per MCD record.

for a part to change its loftset, the part in the tileslot must be changed.

1. it's a door
2. it got destroyed
3.

The 8 sprites for each part cycle constantly on the battlefield. But this doesn't change the loftset of the tilepart.

note: Sliding/UFO doors are tricky ... (they don't cycle until activated, then do only 4 animations before changing to their alternate part, iirc)

[kevL]

here for example is the code that changes to a different MCD record if a part gets destroyed by an explosion

bool TileEngine::detonate(Tile* tile)
https://github.com/OpenXcom/OpenXcom/blob/94640aab1279ae268e0420a7b5c99cc44eb09473/src/Battlescape/TileEngine.cpp#L1560

bool Tile::destroy(TilePart part, SpecialTileType type)
https://github.com/OpenXcom/OpenXcom/blob/94640aab1279ae268e0420a7b5c99cc44eb09473/src/Savegame/Tile.cpp#L466