#21

src/lib/MeshUtils.js

@@ -50,6 +50,7 @@ function getBoundingBoxCenterPoint(bb, relativeTo){
 }
 
 function autoScale(object, mk = 1) {
+    if (mk === null) return;
     let bb = getBoundingBox(object);
     let k = getBoundingBoxMaxLength(bb);
     object.scale.multiplyScalar(mk / k);
@@ -74,7 +75,7 @@ function centerOrigin(object){
 
 function bottomOrigin(object){
     let group = centerOrigin(object);
-    group.userData.object.position.y += (group.userData.bbox.max.y - group.userData.bbox.min.y)/2
+    group.userData.object.position.y = -group.userData.bbox.min.y
     return group;
 }