Ground gravity for 2d game Android

Question

I am using AndEngine to create a 2d Game for Android platform using ecliplse java.

I have learned how to use Tiled to create tiled maps. The only problem i am having is that i dont know how to place an object such as a character on the ground, and have it count as the ground.

How do i go about doing this or what is the best way to do this?

Answer 1

AndEngine examples have a TMX Map Example which, among other things, demonstrates how to place a character on the map and how to determine in which map cell the character is currently in.

From there it should be simple(-ish) - you need to designate some map tiles as "empty" and some as "solid" - TMX format allows you to specify properties of tiles so I guess that's what I would use. Then you write a function which checks if your character is in "mid-air", an if so, the character should begin falling. In pseudocode:

if (map.isEmptySpace(character.getX(), character.getY()) {
   character.setVSpeed(character.getVSpeed() + GRAVITY);
}