diff --git a/panda/src/mathutil/boundingBox.I b/panda/src/mathutil/boundingBox.I
index 2b595b5794..9887d75860 100644
--- a/panda/src/mathutil/boundingBox.I
+++ b/panda/src/mathutil/boundingBox.I
@@ -114,3 +114,17 @@ get_plane(int n) const {
                 get_point(plane_def[n][1]),
                 get_point(plane_def[n][2]));
 }
+
+////////////////////////////////////////////////////////////////////
+//     Function: BoundingBox::set_min_max
+//       Access: Published
+//  Description: Sets the min and max point of the rectangular solid.
+////////////////////////////////////////////////////////////////////
+INLINE_MATHUTIL void BoundingBox::
+set_min_max(const LPoint3 &min, const LPoint3 &max) {
+  nassertv(!min.is_nan() && !max.is_nan());
+  nassertv(_min[0] <= _max[0] && _min[1] <= _max[1] && _min[2] <= _max[2]);
+  _min = min;
+  _max = max;
+  _flags = 0;
+}
diff --git a/panda/src/mathutil/boundingBox.h b/panda/src/mathutil/boundingBox.h
index d816e69a58..8d76955e8e 100644
--- a/panda/src/mathutil/boundingBox.h
+++ b/panda/src/mathutil/boundingBox.h
@@ -46,6 +46,7 @@ public:
 
   virtual void output(ostream &out) const;
 
+
 PUBLISHED:
   INLINE_MATHUTIL int get_num_points() const;
   INLINE_MATHUTIL LPoint3 get_point(int n) const;
@@ -54,6 +55,8 @@ PUBLISHED:
   INLINE_MATHUTIL LPlane get_plane(int n) const;
   MAKE_SEQ(get_planes, get_num_planes, get_plane);
 
+  INLINE_MATHUTIL void set_min_max(const LPoint3 &min, const LPoint3 &max);
+
 public:
   // Inline accessors for speed.
   INLINE_MATHUTIL const LPoint3 &get_minq() const;
diff --git a/panda/src/mathutil/boundingSphere.I b/panda/src/mathutil/boundingSphere.I
index c42c7a40e4..708753ec3d 100644
--- a/panda/src/mathutil/boundingSphere.I
+++ b/panda/src/mathutil/boundingSphere.I
@@ -19,7 +19,7 @@
 //  Description: Constructs an empty sphere.
 ////////////////////////////////////////////////////////////////////
 INLINE_MATHUTIL BoundingSphere::
-BoundingSphere() {
+BoundingSphere() : _center(0) {
 }
 
 ////////////////////////////////////////////////////////////////////
@@ -44,7 +44,6 @@ BoundingSphere(const LPoint3 &center, PN_stdfloat radius) :
 ////////////////////////////////////////////////////////////////////
 INLINE_MATHUTIL LPoint3 BoundingSphere::
 get_center() const {
-  nassertr(!is_empty(), LPoint3::zero());
   nassertr(!is_infinite(), LPoint3::zero());
   return _center;
 }
@@ -61,3 +60,25 @@ get_radius() const {
   return _radius;
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: BoundingSphere::set_center
+//       Access: Published
+//  Description: Sets the center point of the sphere.
+////////////////////////////////////////////////////////////////////
+INLINE_MATHUTIL void BoundingSphere::
+set_center(const LPoint3 &center) {
+  nassertv(!center.is_nan());
+  _center = center;
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: BoundingSphere::set_radius
+//       Access: Published
+//  Description: Sets the radius of the sphere.
+////////////////////////////////////////////////////////////////////
+INLINE_MATHUTIL void BoundingSphere::
+set_radius(PN_stdfloat radius) {
+  nassertv(!cnan(radius));
+  _radius = radius;
+  _flags = 0;
+}
diff --git a/panda/src/mathutil/boundingSphere.h b/panda/src/mathutil/boundingSphere.h
index d5b8854763..26e78209cb 100644
--- a/panda/src/mathutil/boundingSphere.h
+++ b/panda/src/mathutil/boundingSphere.h
@@ -47,6 +47,10 @@ PUBLISHED:
   INLINE_MATHUTIL LPoint3 get_center() const;
   INLINE_MATHUTIL PN_stdfloat get_radius() const;
 
+  INLINE_MATHUTIL void set_center(const LPoint3 &center);
+  INLINE_MATHUTIL void set_radius(PN_stdfloat radius);
+
+
 public:
   virtual const BoundingSphere *as_bounding_sphere() const;