[Kool]

Hi guys,

I have an issue where I’ve placed some entities inside a Row item. I use a row because it’s useful in positioning my entities together and moving them as one. I could create them in the scene itself, but it over complicates what I want to do.

Here is a sample game that illustrates the issue:

import Felgo 3.0
import QtQuick 2.0

GameWindow {
    id: gameWindow
    
    activeScene: scene
    
    screenWidth: 960
    screenHeight: 640
    
    EntityManager {
        id: entityManager
        entityContainer: scene
    }
    
    Scene {
        id: scene
        width: 480
        height: 320
        
        PhysicsWorld {
            debugDrawVisible: true
        }
        
        Rectangle {
            color: "black"
            anchors.fill: parent
        }
        
        Item {
            width: 100
            height: 50
            anchors {top: parent.top; right: parent.right}
            
            Text {
                text: "Click"
                color: "white"
                anchors.centerIn: parent
            }
            
            MouseArea {
                anchors.fill: parent
                onClicked: movement.start()
            }
        }
        
        MovementAnimation {
            id: movement
            target: content
            property: "y"
            velocity: 10
        }
        
        Row {
            id: content
            height: 50
            width: 200
            spacing: 2
            x: scene.width/2 - content.width/2
            y: scene.height/2 - content.height/2
            Repeater {
                model: 4
                
                EntityBase {
                    width: 50
                    height: 50
                    
                    Rectangle {
                        color: "white"
                        anchors.fill: parent
                    }
                    
                    BoxCollider {
                        anchors.fill: parent
                        bodyType: Body.Static
                        collisionTestingOnlyMode: true
                    }
                }
            }
        }
    }
}

If you run the game, you’ll see the box colliders are not centered within the entities but are in the top left of the scene. This appears to be due to something fishy with the coordinate mapping from the entity base, the row and the scene itself.

Any ideas what I can do here?

• This topic was modified 6 years, 12 months ago by  cplusplusistough@gmail.com.

[GüntherFelgo Team]

Hi Kool!

At the moment, the collider position in the physics-world only takes the position of the entity into account, but not additional offsets due to the position of parent items.

If you use the following code for the collider to also include the offset of the row, the positions should match again:

BoxCollider {
  width: parent.width
  height: parent.height
  x: content.x
  y: content.y
  bodyType: Body.Static
  collisionTestingOnlyMode: true
}

Best,
Günther

[Kool]

Perfect! Thanks!