Phaser using overlap() with two sprites

[kcurtin]

Hi All - I have two Sprites, a player and a shape. When the player is overlapping the shape, I want it to accerate the player sprite object (like a conveyor belt).. I'm having some issues getting this to work with the following code:

 

var Player = function(game, x, y, frame) {

  Phaser.Sprite.call(this, game, x, y, 'playerMovements', 0);

  this.game.physics.arcade.enableBody(this);

  this.body.collideWorldBounds = true

  this.anchor.setTo(0.5, 0.5);

};

 

var Belt = function(game, player, x, y) {

  var beltBMD = game.add.bitmapData(50, 400);

  beltBMD.ctx.fillStyle = 'red';

  beltBMD.ctx.fillRect(0, 0, 50, 400);

  Phaser.Sprite.call(this, game, x, y, beltBMD);

  this.game.physics.arcade.enable(this);

 

  // Code that isn't working as intended

  this.game.physics.arcade.overlap(this, player, this.applyEffect, null, this);

 

  this.game.time.events.add(2000, this.destroy, this);

  this.game.add.existing(this);

  player.bringToTop()

};

 

Belt.prototype.applyEffect = function(drop, player) {

  console.log(drop.body.overlapX); // 0

  console.log(drop.body.overlapY); // 0

  console.log(player.body.overlapX); // 0

  console.log(player.body.overlapY); // 0

  player.body.velocity.y += 400;

};

 

The issue is that my applyEffect callback gets triggered, but there isn't an overlap property set on either of the two objects so I can't accelerate until the overlap properties are back to 0 because they never seem to be set in the first place. If the callback gets triggered, shouldn't an overlap be set? Open to other suggestions about how to do this, I went with the bitmap data approach because I need to be able to draw shapes w/ physics bodies which the Graphics class doesn't support.

 

Thanks!

 

 

[lewster32]

Overlap needs to be called in a repeating function, usually update or a function called from update, as it is a discreet check. Take it out of your belt constructor and place it in your main game's update loop, and have it check player against all belts (add the belts to a group or an array to do this) which will be much faster than having every belt check its own collision against the player. 

[kcurtin]

Ah, got it. I was misunderstanding how this works. Thank you.