Collision with Tilemap Layer

[Uneven_Prankster]

A boolean "Collidable" would be impractical, as there are many types of collisions: is the block solid walkable floor? One-way platform? A ladder?  Sliding slope? Dangerous spikes? All of them are collidable but must behave differently.

Currently up to version 2.4.x, Tilengine reads a custom property called "type" in the tileset. It is numeric in type, and is the value returned in TLN_TileInfo::type structure member (http://www.tilengine.org/doc/struct_t_l_..._info.html). The example project SuperMarioClone uses this system to determine the type of tile, if you open the file smw_foreground.tsx you will see it.

Since I implemented this feature, the Tiled editor has had the standard property Type added to the tilleset. In a future update that I am preparing, it will also bring this property to get the type, although I will leave the current custom property for backwards compatibility. You can even see this parameter unused in your screenshot, just below ID.

There are other gameplay implementations that use a layer exclusively for collisions, in which there are as many different tiles as there are collidable block types, and it uses the tile ID as a type. It is a bit redundant, and although it can be done it is preferable to work directly with the "type" property in the main tileset:
https://ansimuz.itch.io/sunnyland-forest

I have managed to get it working now, but my implementation seems wonky at best. I can't seem to hit well geometry and in some instances getting collisions close to the 0,0 coordinate can result in a segfault! Here is my code as it currently is. I don't know how I can correctly test with tiles... I have been making use of the fixed point stuff too which resulted in a few moments I forgot to convert to int hah. I should pay more attention!