No collision detected on sprite sides

[Alwin]

Hi guys !

 

I am trying to create a classical 2D platform game (They are so great, aren't they?) with Phaser that i discovered recently. I certainly explain why i am not able to explain the reason of this strange behavior.

 

My problem is that when i am moving my character, it only collides with the top and down sides of my blocks.

Is there any reason for that behavior ?

 

Here is my global configuration:

 // Physics configurationthis.phaserInstance.physics.startSystem(Phaser.Physics.ARCADE);this.phaserInstance.physics.arcade.gravity.y = 300;// Setting the world boundariesthis.phaserInstance.world.setBounds(0,0, 2800, 1400);// Adding the blue backgroundthis.phaserInstance.add.tileSprite(0,0, 2800 , 1400,'background');this.phaserInstance.camera.y = 1000;

Then i add my sprites:

box = this.phaserInstance.add.sprite(200, 1300, 'tiles', 'box');this.phaserInstance.physics.enable(box, Phaser.Physics.ARCADE);box.body.collideWorldBounds = true;box.body.allowGravity = false;box.body.immovable = true;me = this.phaserInstance.add.sprite(200, 1000, 'player1');this.phaserInstance.physics.enable(me, Phaser.Physics.ARCADE);me.body.collideWorldBounds = true;console.log(me.body.checkCollision.right);console.log(box.body.checkCollision.right);cursors = this.game.input.keyboard.createCursorKeys();

Finally, i add my collision detection in the 'update' function

update: function(){	this.phaserInstance.physics.arcade.collide(me, box);	if(cursors.right.isDown) {		me.body.x += 5;	}	if(cursors.left.isDown) {		me.body.x -= 5;	}},

Any thoughts ?

Thanks !

[lewster32]

You shouldn't be changing the body.x directly, you should be using body.velocity.x otherwise the physics system will not know how to correctly apply the appropriate separation. See this example: http://gamemechanicexplorer.com/#platformer-1

[Alwin]

Thanks for your answer.

Its seems that managing the character with velocity.{x|y} instead of body.{x|y} fix my issue.

 

Should i signal that problem on github ?

[ZoomBox]

Not at all because that's the way it's supposed to work.

By setting the possition of the body, your are saying "go there but don't especially check for collision".

By setting a velocity you are saying "Go this way and check collisions on the way".