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Phaser: trying to get pixel??


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Hello. I am trying to do something similar to this example: http://jsbin.com/wutanilura/edit?js,console,output

This is part of my code: 

 // the way I created the bombs (inside its class). This works fine

for(var x = 0; x < 20; x++) {

            *this.bombs_group.bomb = this.bombs_group.create(0,0,this.bmd_bomb);
            this.bombs_group.bomb.name = 'bomb' + x;
            this.bombs_group.bomb.exists = false;
            this.bombs_group.bomb.visible = false;
            this.bombs_group.bomb.checkWorldBounds = true;


// the way I created the wall inside its class

 this.wall = game.add.sprite(800,100,this.wall_bmd, 0,map_elements_group);
 this.wall.body.immovable = true;
 this.wall.body.allowGravity = false;

// to fire bombs

 function fireBomb(player_bombs,player_body) {

        var bomb = player_bombs.getFirstExists(false);

        if(bomb) {

            bomb.reset(player_body.x + 30,player_body.y + 20);
            bomb.body.velocity.x = 300;

// player_bomb is equal to this : *this.bombs_group.bomb
// map_elements
function bombVsMap (player_bomb,map_elements) {
        var bomb_x = Math.floor(player_bomb.x);
        var bomb_y = Math.floor(player_bomb.y);

        var get_collision_pixel = wall_bmd.getPixel(bomb_x,bomb_y);
        wall_bmd.circle(0, 100, 100, 'rgba(0, 0, 0, 255');


The problems I am facing are:

- The bomb_x and bomb_y in the bombVsMap function when console.logged is also "0", but I see the object moving through the map ( Why do I get this value)?

- I can't get the correct pixel when I do wall_bmd.getPixel (even when I put the X and Y position in the parameters the same as the position of the wall_body);

- I can make the wall "dissapear manually" when I set the X and Y of the wall_bmd.circle but the XY referential seems to start on the left upper corner of the bmd? 

Can someone help me please?

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46 minutes ago, samme said:

Make sure the wall bitmap has dimensions identical to the world and the wall sprite is located at (0, 0). That aligns the bitmap coordinates with the world coordinates.

Well, I have it like this. Shouldn't also work?

 this.wall_bmd = game.add.bitmapData(200, 300);
 this.wall_bmd.ctx.rect(0, 0, 200, 300);
 this.wall_bmd.ctx.fillStyle = '#FFA07A';

 this.wall = game.add.sprite(800,100,this.wall_bmd, 0,map_elements_group);


EDIT : oh got it. I understand what you meant. But this way I have to set my wall body to a rect. How is that? 

EDIT2: I just set the body to a rect. The only problem know is why the bomb position is always 0...

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