Normals causing collisions?

[DAT64X]

Is there anyway to turn off normals of GeometryArrays?  Right now I draw a QuadArray in the shape of a square on the xy plane, and another one on the yz plane.  When I place an object, like a cube, on either of the two shape's normals (i.e. in the "line-of-sight" of the squares), it says my cube detects a collision.  The strange thing is, if I only draw a square on one of the planes, I don't detect collisions.  Any clues as to what might be going on?

--DAT

[rdcarvallo]

 Are the planes intersecting the object??

 Example:

   |       <--- plane
+--+--+
|  |  |
|  |  |       <--- box
|  |  |
+--+--+
   |
   |
   |

[DAT64X]

Hm, well I don't think so, though I might be wrong.  For instance, if I wanted to draw a square that is flat on the xz plane, wouldn't I do something like this?

1   2   3   4   5

QuadArray xzShadow = new QuadArray(4, QuadArray.COORDINATES); xzShadow.setCoordinate(0, new Point3d(lp.x, 0.0, lp.z)); xzShadow.setCoordinate(1, new Point3d(up.x, 0.0,lp.z)); xzShadow.setCoordinate(2, new Point3d(up.x,0.0,up.z)); xzShadow.setCoordinate(3, new Point3d(lp.x, 0.0,up.z));

, where lp and up are 2 opposite-cornered points?