fix for strafe

direct/src/controls/GravityWalker.py

@@ -515,9 +515,7 @@ class GravityWalker(DirectObject.DirectObject):
             rotation = dt * self.rotationSpeed
 
             # Take a step in the direction of our previous heading.
-            self.vel=Vec3(Vec3.forward() * distance +
+            if distance or slideDistance or self.priorParent != Vec3.zero():
-                          Vec3.right() * slideDistance)
-            if self.vel != Vec3.zero() or self.priorParent != Vec3.zero():
                 # rotMat is the rotation matrix corresponding to
                 # our previous heading.
                 rotMat=Mat3.rotateMatNormaxis(self.avatarNodePath.getH(), Vec3.up())
@@ -526,24 +524,23 @@ class GravityWalker(DirectObject.DirectObject):
                 else:
                     contact = self.lifter.getContactNormal()
                     forward = contact.cross(Vec3.right())
-                forward = Vec3(rotMat.xform(forward))
+                    # Consider commenting out this normalize.  If you do so
-                # Consider commenting out this normalize.  If you do so
+                    # then going up and down slops is a touch slower and
-                # then going up and down slops is a touch slower and
+                    # steeper terrain can cut the movement in half.  Without
-                # steeper terrain can cut the movement in half.  Without
+                    # the normalize the movement is slowed by the cosine of 
-                # the normalize the movement is slowed by the cosine of 
+                    # the slope (i.e. it is multiplied by the sign as a
-                # the slope (i.e. it is multiplied by the sign as a
+                    # side effect of the cross product above).
-                # side effect of the cross product above).
+                    forward.normalize()
-                forward.normalize()
                 self.vel=Vec3(forward * distance)
                 if slideDistance:
                     if self.isAirborne:
                         right = Vec3.right()
                     else:
                         right = forward.cross(contact)
-                    right = Vec3(rotMat.xform(right))
+                        # See note above for forward.normalize()
-                    # See note above for forward.normalize()
+                        right.normalize()
-                    right.normalize()
+                    self.vel=Vec3(self.vel + (right * slideDistance))
-                    self.vel=Vec3(self.vel + right * slideDistance)
+                self.vel=Vec3(rotMat.xform(self.vel))
                 step=self.vel + (self.priorParent * dt)
                 self.avatarNodePath.setFluidPos(Point3(
                         self.avatarNodePath.getPos()+step))