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Squaby Demo

 import QtQuick 2.0
 import Felgo 4.0

 Item {
   id: towerBaseSprite
   // the logical 0° point is to the right, but the images are pointing downwards, so to let them look to the right as well they must be rotated 90° counterclockwise
   property int rotationOffset: -90

   // we do not want the base to rotate with the entity so we rotate against the parent(entity) rotation
   rotation: -parent.rotation+rotationOffset

   property string spriteSheetSource
   // update state (normal, rapid, area, super)
   property int frameElement: 1

   MultiResolutionImage {
 //    filename: "../../assets/img/all-sd.json"
     source: towerBaseSprite.spriteSheetSource
     anchors.centerIn: parent
   }

   function setTowerImageFromEvent(event) {
     var rangeUpgrade;
     var shootDelayUpgrade;
     for(var i=0;i<event.upgrades.length;i++) {
       var upgrade = event.upgrades[i];
       if(upgrade.type === "range")
         rangeUpgrade = upgrade;
       else if(upgrade.type === "shootDelay" || upgrade.type === "damagePerSecond")
         shootDelayUpgrade = upgrade;
     }

     if(!rangeUpgrade || !shootDelayUpgrade) {
       console.log("WARNING: one of the necessary upgrades range or shootDelay not found, this should never happen!");
       return;
     }

     if(shootDelayUpgrade.currentPlayerUpgradeLevel === 1 && rangeUpgrade.currentPlayerUpgradeLevel === 1) {
       frameElement = 4;
     } else if(rangeUpgrade.currentPlayerUpgradeLevel === 1) {
       frameElement = 3;
     } else if(shootDelayUpgrade.currentPlayerUpgradeLevel === 1) {
       frameElement = 2;
     } else {
       frameElement = 1;