Collision detection for Animation? [Solved]

jkosonen

Is it possible to add collision detection to animation so that it launches every time the animation moves?

Example if you have PropertyAnimation on x { from: 0; to:100; duration 1000}
Is it somehow possible to bind for example PropertyChange on x to that animation?

Or is there any other way to make good collision detection, if you create timer, it doesn't take all pixels.. and it lags when your phone lags..

mbrasser

You could try performing the collision detection in the onXChanged handler:

@onXChanged: detectCollisions()@

Depending on what you are making, you might also be able to make use of something like http://gitorious.org/qml-box2d (QML bindings for Box2D).

Regards,
Michael

jkosonen

I tried to use onXChanged, but animation didn't trigger it.

mbrasser

Hmm, it should be triggered -- can you check if the following works for you? (it should print lots of messages to the console)

@import QtQuick 1.0

Rectangle {
width: 400
height: 400

Rectangle {
    id: rect
    width: 100
    height: 100
    color: "red"
    PropertyAnimation on x { from: 0; to: 100; duration: 1000 }
    onXChanged: console.log("x changed to " + x)
}

}@

Regards,
Michael

jkosonen

Hey, thanks. It was Behaviour on x, that I had tried earlier!

onXChanged worked like a charm, thanks!