apply patch to allow soft body rayTest. Minor change in patch: test for current hitfraction, so only report hits closer than current closest hit fraction.

Thanks to Benoit Bolsee for the patch, see Issue 311
http://code.google.com/p/bullet/issues/detail?id=311

src/BulletCollision/BroadphaseCollision/btBroadphaseProxy.h

@@ -150,6 +150,12 @@ BT_DECLARE_ALIGNED_ALLOCATOR();
 	{
 		return (proxyType == COMPOUND_SHAPE_PROXYTYPE);
 	}
+
+	static SIMD_FORCE_INLINE bool	isSoftBody(int proxyType)
+	{
+		return (proxyType == SOFTBODY_SHAPE_PROXYTYPE);
+	}
+
 	static SIMD_FORCE_INLINE bool isInfinite(int proxyType)
 	{
 		return (proxyType == STATIC_PLANE_PROXYTYPE);

src/BulletCollision/CollisionDispatch/btCollisionWorld.h

@@ -363,7 +363,7 @@ public:
 
 	/// rayTest performs a raycast on all objects in the btCollisionWorld, and calls the resultCallback
 	/// This allows for several queries: first hit, all hits, any hit, dependent on the value returned by the callback.
-	void	rayTest(const btVector3& rayFromWorld, const btVector3& rayToWorld, RayResultCallback& resultCallback) const; 
+	virtual void rayTest(const btVector3& rayFromWorld, const btVector3& rayToWorld, RayResultCallback& resultCallback) const; 
 
 	// convexTest performs a swept convex cast on all objects in the btCollisionWorld, and calls the resultCallback
 	// This allows for several queries: first hit, all hits, any hit, dependent on the value return by the callback.

src/BulletCollision/CollisionShapes/btCollisionShape.h

@@ -80,6 +80,11 @@ public:
 		return btBroadphaseProxy::isCompound(getShapeType());
 	}
 
+	SIMD_FORCE_INLINE bool	isSoftBody() const
+	{
+		return btBroadphaseProxy::isSoftBody(getShapeType());
+	}
+
 	///isInfinite is used to catch simulation error (aabb check)
 	SIMD_FORCE_INLINE bool isInfinite() const
 	{