test colission

[jbicalhk]

hi, I want to know how I test the collisions that I indicated on tiledmaps?

[fallahn]

That's a very broad question - it depends on how you added your collision data to your maps. Generally:

• Create an object layer (or more) with your collision objects on it
• Load the map with the map loader and put all the collision objects in some kind of container like std::vector
• If the objects are all rectangular you can use them for simple AABB collision
• If the objects are complex polygons, deconstruct them into smaller convex shapes and use SAT

[ldornbusch]

Back in 2019 I created some methods to query a tile in a specific layer: #49
I use it for my platformer: I have a separate Layer (which is optional invisible) and it shows all places the character can stand on or walls. You can check with the
tmx::TileLayer::Tile getTile(int tileX, int tileY) function if a collision occurred by checking the new position. If the tile is empty the Tile Id is zero.