Fix export algo

Author: NeusFear

apps/studio/src/studio/formats/project/BBModelExporter.ts

@@ -374,7 +374,7 @@ const convertCube = (cube: DCMCube, positionCache: WorldPositionCache): CubeElem
     name: `${cube.name.value}_cube`,
     rescale: false,
     locked: false,
-    from: from,
+    from: minusArray(from, cubeGrow),
     to: plusArr(from, plusArr(dimension, cubeGrow)),
     autouv: 0,
     color: 1,
@@ -471,6 +471,14 @@ const plusArr = (arr1: NumArray, arr2: NumArray): NumArray => {
   ]
 }
 
+const minusArray = (arr1: NumArray, arr2: NumArray): NumArray => {
+  return [
+    arr1[0] - arr2[0],
+    arr1[1] - arr2[1],
+    arr1[2] - arr2[2],
+  ]
+}
+
 const _cloneArr = <T>(lo: LO<T>): T => {
   return Array.from(lo.value as any) as any
 }