Question

Hy, I have started a Game in andengine for android, I want to apply a jump functionality on a sprite which will be like some projectile motion , up and forward as well . I have applied move modifier to gain that functionality. But that is not in projectile motion.

How can i achieve that and while the jump of my sprite by tapping again it cant jump again until it completes it jump.i dont want to use delay function on scene touch .any help .

final Entity playerEntity = move;
final float jumpDuration = 1;
final float startX = playerEntity.getX();
final float jumpHeight = 60;
move.getTextureRegion().setFlippedVertical(true);
final MoveModifier jumpForwardUp = new MoveModifier(jumpDuration/2, startX, startX - jumpHeight, playerEntity.getY(), playerEntity.getY() + 130);
final MoveModifier jumpForwardDown = new MoveModifier(jumpDuration/2, startX - jumpHeight, startX, playerEntity.getY() + 130, playerEntity.getY() + 170);
final SequenceEntityModifier modifier = new SequenceEntityModifier(jumpForwardUp ,jumpForwardDown);
playerEntity.registerEntityModifier(modifier);

Answer 1

Try using JumpModifier and for some real physics work, go for Box2d Extension of AndEngine and go through some of AndEngine examples code.

Edit:

AndEngine have list of modifiers. JumpModifier is one of them. Maintain a class level or project level flag that is true when your object is in jump and is false when object is in normal state.

Every modifier takes an object of IModifierListner set that flag to true in onStart of IModifierListner and set that to false at onEnd of IModifierListner. at every tap check if that flag is true then simple return and do nothing.