Arcade Circle bodies moving through other bodies. Reproducible.

[Arcanorum]

This Issue is about

• A bug in the API

I'm using 2.7.5.
When a physics body is moving fast enough, it can pass though other bodies that it is supposed to collide with. The velocity that this happens at is not the same for rectangle and circle bodies.

Here it can be seen, from Phaser sandbox. Press space to jump. The rectangle and circle bodies fall and hit the platform below at the same speed, but the circle passes though. When tried with lower values for gravity, this doesn't happen.

/**
 * Generated from the Phaser Sandbox
 *
 * //phaser.io/sandbox/rDpRbHcW
 *
 * This source requires Phaser 2.6.2
 */

var game = new Phaser.Game(800, 600, Phaser.AUTO, '', { preload: preload, create: create, update: update, render: render });

function preload() {

    game.stage.backgroundColor = '#85b5e1';

    game.load.baseURL = 'http://examples.phaser.io/assets/';
    game.load.crossOrigin = 'anonymous';

    game.load.image('player', 'sprites/phaser-dude.png');
    game.load.image('platform', 'sprites/platform.png');

}

var player;
var player2;
var platforms;
var cursors;
var jumpButton;

function create() {

    player = game.add.sprite(100, 200, 'player');
    player2 = game.add.sprite(150, 200, 'player');

    game.physics.arcade.enable(player);
    game.physics.arcade.enable(player2);

    player.body.collideWorldBounds = true;
    player.body.gravity.y = 200;
    
    player2.body.setCircle(20);
    player2.body.collideWorldBounds = true;
    player2.body.gravity.y = 200;

    platforms = game.add.physicsGroup();

    platforms.create(500, 150, 'platform');
    platforms.create(-200, 300, 'platform');
    platforms.create(400, 450, 'platform');

    platforms.setAll('body.immovable', true);

    cursors = game.input.keyboard.createCursorKeys();
    jumpButton = game.input.keyboard.addKey(Phaser.Keyboard.SPACEBAR);

}

var collideSpeed = 0;
var collideSpeed2 = 0;

function update () {

    game.physics.arcade.collide(player, platforms, function(){
        collideSpeed = player.body.velocity.y;
    });
    game.physics.arcade.collide(player2, platforms, function(){
        collideSpeed2 = player2.body.velocity.y;
    });

    player.body.velocity.x = 0;
    player2.body.velocity.x = 0;

    if (cursors.left.isDown)
    {
        player.body.velocity.x = -250;
        player2.body.velocity.x = -250;
    }
    else if (cursors.right.isDown)
    {
        player.body.velocity.x = 250;
        player2.body.velocity.x = 250;
    }

    if (jumpButton.isDown && (player.body.onFloor() || player.body.touching.down))
    {
        player.body.velocity.y = -400;
    }
    
    if (jumpButton.isDown && (player2.body.onFloor() || player2.body.touching.down))
    {
        player2.body.velocity.y = -400;
    }
}

function render () {
    game.debug.text('rect Y velocity: ' + player.body.velocity.y, 8, 140, "#ff00ff");
    game.debug.text('rect X velocity: ' + player.body.velocity.x, 8, 160, "#ff00ff");
    game.debug.text('rect collide speed: ' + collideSpeed, 8, 180, "#ff00ff");
    game.debug.body(player);
    
    game.debug.text('circ Y velocity: ' + player2.body.velocity.y, 408, 140, "#ff00ff");
    game.debug.text('circ X velocity: ' + player2.body.velocity.x, 408, 160, "#ff00ff");
    game.debug.text('circ collide speed: ' + collideSpeed2, 408, 180, "#ff00ff");
    game.debug.body(player2);
}

[samme]

http://codepen.io/samme/pen/gmJeYK