Fix bug in the rotation of spheres

Author: BruceSherwood

lib/glow/primitives.js

@@ -351,7 +351,7 @@
             }
 
             this.pos = origin.add(this.__pos.sub(origin).rotate({angle:angle, axis:rotaxis}))
-            if (isarrow) this.axis_and_length = this.__axis_and_length.rotate({angle:angle, axis:rotaxis})
+            if (isarrow) this.__axis_and_length = this.__axis_and_length.rotate({angle:angle, axis:rotaxis})
             else this.axis = this.__axis.rotate({angle:angle, axis:rotaxis})
             this.up = Y.rotate({angle:angle, axis:rotaxis})
 
@@ -498,7 +498,7 @@
         radius: {
         	get: function() { return this.__size.__y/2 },
         	set: function(value) {
-        		this.__size.__x = this.__size.__y = this.__size.__z = 2*value
+        		this.size = vec(2*value,2*value,2*value)
         		this.__change()
         	}
         }