Hello forum, recently I began to use a Tiled map for my game. I was thinking about using a more traditional AABB collision method but then found out I can get tile ID's and so I would imagine I could figure out collision that way. I was trolling through past posts about Tiled and collision detection and came upon this:
Moving on. This is you would get the ID of a Tile with libgdx:
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| private int computeCollisionLayerIndex(TiledMap map) {
for (int i = 0; i < map.getLayers().getCount(); i++) {
if (map.getLayers().get(i).getName().equalsIgnoreCase("collision")) {
return i;
}
}
return -1;
}
public void whatevername(TiledMap map) {
int collisionLayerIndex = computeCollisionLayerIndex(map);
if (collisionLayerIndex != -1) {
MapLayer layer = map.getLayers().get(collisionLayerIndex
if (layer instanceof TiledMapTileLayer) {
getCollisionTilesFrom((TiledMapTileLayer) layer);
} else throw some kind of error
} else throw some kind of error
}
public void getCollisionTilesFrom(TiledMapTileLayer layer) {
for (int x = 0; x < layer.getWidth(); x++) {
for (int y = 0; y < layer.getHeight(); y++) {
TiledMapTileLayer.Cell cell = layer.getCell(x, y);
if (cell == null) continue; if (cell.getTile() == null) continue;
System.out.println(cell.getTile().getID()); }
}
} |
With this code in particular
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| TiledMapTileLayer.Cell cell = layer.getCell(x, y); |
You can get the ID from a specific cell. Now for the questions:
1. What would the cell ID turn up as ? A number or some string - how would this be relevant to what is exactly placed?
2. After I figure out when my player is next to a certain tile, how could i prevent the player from moving onto that tile? Would there be a simple way to determine if the tile is to the left of the character, and making a variable like isAbleToMoveLeft set to false if its near a tile where it can not move left.Maybe something like this?
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| if(collisionTile.x < player.x){
isAbleToMoveLeft = false;
} |
3. Final question is this: I have items drawn in 4 layers in Tiled. Is this something that will effect the way collision detection works? In the method written by matheus23 the
getCollisionTilesFrom method requires a layer. So I am curious if 4 layers will create problems.
Thanks for the help!
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also re added that mining robot now with moving animations for up down left and right. More mobs and animals should now be simple to add. If you have suggestions for which to add feel free to tell me.
