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Can't get collision working


nb0yc33
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Hey, I'm relatively new to Phaser, it'd be great if anyone could help with getting the collision between the user and the laserBoundaries group to work. The main code is below:

 

 

 

 

var user;
var laserBoundaries;
var collisionHandler;
var Level1State = {
    
    
    create: function(){
        
    game.physics.startSystem(Phaser.Physics.ARCADE);
        
        
    var backdrop = game.add.image(0, 0, 'backdrop'); 
    var exit = game.add.image(1066, 3156, 'staircaseexit');
    var bomb = game.add.image(900, 25, 'bomb');
        
    
    game.world.setBounds(0, 0, 1152, 3240);
        
    
    user = game.add.sprite(560, 5, 'player');
    game.physics.enable(user, Phaser.Physics.ARCADE);
    game.camera.follow(user);
    user.body.collideWorldBounds = true;
        
        
    laserBoundaries = this.add.group();
    game.physics.enable(laserBoundaries, Phaser.Physics.ARCADE);
    var laser1 = game.add.image(650, 273, 'laser');
    var laser2 = game.add.image(650, 0, 'laser2');
    var laser3 = game.add.image(470, 0, 'laser2');
    var laser4 = game.add.image(72, 273, 'laser');
    laserBoundaries.add(laser1);
    laserBoundaries.add(laser2);
    laserBoundaries.add(laser3);
    laserBoundaries.add(laser4);
    
    
    

        
    
    
        
cursors = game.input.keyboard.createCursorKeys();
    
 

    
    
        
    },
    
    
    

    
    update: function(){
        
        
        game.physics.arcade.overlap(user, laserBoundaries, collisionHandler, null, this);
    
        
        
        

        if (game.input.keyboard.isDown(Phaser.Keyboard.LEFT))
    {
      
        user.x = user.x-4;
        
        
    }
    else if (game.input.keyboard.isDown(Phaser.Keyboard.RIGHT)) 

    {
        
        user.x = user.x+4;
        
        
    }

    if (game.input.keyboard.isDown(Phaser.Keyboard.UP))
    {
        
        user.y = user.y-4;
        
        
    }
    else if (game.input.keyboard.isDown(Phaser.Keyboard.DOWN))
    {
        
        user.y = user.y+4;
        
        
     }


  
    
        
    },
    
    
    collisionHandler: function() {
        
        console.log('COLLISION!');
        
        

        
        
    }
    
    


    
    
    
};

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A couple of things noticeable:

-Your using images instead of sprites.
- Adding physics to group objects can be done by using game.add.physicsGroup(), enabling them on each body individually or by ysing enableBody, but not by enabling physics on the group:

     //you can do this
     laserBoundaries = this.add.group();
     laserBoundaries.enableBody = true;

    //or the above in one line
    laserBoundaries = this.add.physicsGroup();
    
    //but this won't have any effect.
    game.physics.enable(laserBoundaries, Phaser.Physics.ARCADE);

    var laser1 = game.add.sprite(650, 273, 'laser');//change to sprite
    var laser2 = game.add.sprite(650, 0, 'laser2');//change to sprite
    var laser3 = game.add.sprite(470, 0, 'laser2');//change to sprite
    var laser4 = game.add.sprite(72, 273, 'laser');//change to sprite

- collisionHandler is called, but it is never defined (the global variable is not required, you have defined it within your state object). try calling the right function:

        console.log(collisionHandler); //will show undefined
        console.log(this.collisionHandler);//will show the correct one
        game.physics.arcade.overlap(user, laserBoundaries,this.collisionHandler); //this will work

 

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