normalize util.bound to Box3 extensions

src/add/three.js

@@ -75,9 +75,7 @@
             this.boundingBox = null;
             this.computeBoundingBox();
         }
-        let bbox = this.boundingBox;
+        return this.boundingBox;
-        // bbox.dim = bbox.max.clone().sub(bbox.min);
-        return bbox;
     };
 
     BP.moveMesh = function(x = 0, y = 0, z = 0) {

src/mesh/api.js

@@ -396,12 +396,12 @@ let util = mesh.util = {
                 z: box.max.y
             }
         };
-        bnd.size = {
+        bnd.size = bnd.dim = {
             x: bnd.max.x - bnd.min.x,
             y: bnd.max.y - bnd.min.y,
             z: bnd.max.z - bnd.min.z
         };
-        bnd.center = {
+        bnd.center = bnd.mid = {
             x: (bnd.max.x + bnd.min.x) / 2,
             y: -(bnd.max.y + bnd.min.y) / 2,
             z: (bnd.max.z + bnd.min.z) / 2

src/mesh/model.js

@@ -103,6 +103,7 @@ mesh.model = class MeshModel extends mesh.object {
         meh.castShadow = true;
         meh.renderOrder = 1;
         // center vertices then restore mesh object position
+        // still this doesn't work. scale broken for bounding boxes
         // let mid = meh.getBoundingBox().mid;
         // geo.moveMesh(-mid.x, -mid.y, -mid.x);
         // this.move(mid.x, mid.y, mid.x);

src/mesh/object.js

@@ -145,10 +145,10 @@ mesh.object = class MeshObject {
             world.remove(helper);
         }
         if (this._showBounds) {
-            let { center, size } = this.bounds;
+            let { mid, dim } = this.bounds;
             let b3 = new THREE.Box3().setFromCenterAndSize(
-                new THREE.Vector3(center.x, center.y, center.z),
+                new THREE.Vector3(mid.x, mid.y, mid.z),
-                new THREE.Vector3(size.x, size.y, size.z)
+                new THREE.Vector3(dim.x, dim.y, dim.z)
             );
             let helper = this._boundsBox = new THREE.Box3Helper(b3, 0x555555);
             world.add(helper);