FastBall Game

mikealfa

hello everyone,
i am trying to implement the fastball game of iOS by Qt...
i have created Sprite for the active game componenets..

@Image {
id: sprite
source: image

property int type : 0
property string image : ""
property int damage : 1
property real velocity : 0

property real topOffset : 0
property real leftOffset : 0
property real rightOffset : 0
property real bottomOffset : 0

}@

@Sprite
{
id: ball
property int life: 1
property bool imune: false
property int imunePhase: 0
topOffset: 1
rightOffset: 1
bottomOffset: 1
leftOffset: 1

  //objectName: "ball"

Image {
x: -8
y: 18
smooth: true

source: "images/ball8.png"

 RotationAnimation on rotation {
    id:ballRotation
    from: 0
    to: 360
    direction: RotationAnimation.Clockwise
    duration: 1200
    loops: Animation.Infinite
}

}
@

Have the codes for the obstacles in a similar manner in Sprites with type = 1
and the code for the @Star@ with type= 2 in Sprites

How to implement the collision when Ball collides with the obstacles or the Ball collides with the stars to gain points...

chriadam

One possibility, is every tick, call a JavaScript function which iterates over the balls, stars and obstacles to find intersections, and then cause the appropriate change (eg, remove stars, change direction of balls, etc). Not sure whether that would be too performant, however.

mikealfa

i tried this
actually referredto code of Qtflying bus
@function checkCollisions(){
var imune = ball.imune

var obj,collides,damage = 0;

for(var i = 0; i < sprites.length; i++)
{
    obj = sprites[i];

    //if(obj == null || obj.type == ENEMY_TYPE && imune)
      //  continue;

     collides = (ball.y + ball.height - ball.bottomOffset >= obj.y + obj.topOffset
                && ball.y + ball.topOffset <= obj.y + obj.height - obj.bottomOffset
                && ball.x + ball.width - ball.rightOffset >= obj.x + obj.leftOffset
                && ball.x + ball.leftOffset <= obj.x + obj.width - obj.rightOffset);

    if(collides){
        if(obj.type == ENEMY_TYPE){
            imune = true;
            damage = obj.damage;
        }else if(obj.type == STAR_TYPE){


        }

    }

}

if(damage > 0){
    ball.imune = true;
    ball.life = Math.max(ball.life - 1, 0);

    if (ball.life == 0) {
        saveScoreToDisk();
        menu.setState("gameover", false);
        start.state = "";
    }
}

}@

and called this function using a timer

@Timer{

id:timer
repeat: true
interval: 30
running: false
onTriggered: Engine.checkCollisions();

}@

but this isnt working :(