Update deleteClone for cube coords

src/modules/game/soldier.js

@@ -9,16 +9,9 @@ function traceSelector(counter) {
 }
 
 function getCellPosition(cell) {
-  let pt = new DOMPoint(0, 0),
-    transform = getComputedStyle(cell).transform.match(/-?\d+\.?\d*/g),
-    mtx = new DOMMatrix(transform);
-    pt = pt.matrixTransform(mtx);
+  const [x, y] = cell.getAttributeNS(null, 'transform').match(/-?\d+\.?\d*/g);
 
-  transform = getComputedStyle(cell.parentElement).transform.match(/-?\d+\.?\d*/g);
-  mtx = new DOMMatrix(transform);
-  pt = pt.matrixTransform(mtx);
-
-  return pt;
+  return { x, y };
 }
 
 function getClones(svg, counter) {
@@ -35,12 +28,9 @@ function addMoveToHistory(selected) {
 }
 
 function updatePlacement(cell, selected, clone) {
-  const prevCoords = [
-    clone.parentElement.dataset.x,
-    clone.parentElement.parentElement.dataset.y
-  ]
+  const { q, r, s, t } = clone.parentElement.dataset;
 
-  selected.dataset.previous = prevCoords;
+  selected.dataset.previous = [q, r, s, t];
   cell.appendChild(selected);
 
   Array.from(selected.children).forEach(n => {