Shooting a "gun"

Scripting Issues
1

Hi, I been trying to figure out how to shoot a gun but can’t seem to get it to work or I dont understand a little bit of the code.

I know you need to use “clicking on 3d objects” by “shooting” a ray and test to see what it hits, but for some reason I don’t get what i’m trying to hit back to me. Actully I dont know if i’m doing the code right at all either.

    def Collisions(self):
      base.cTrav = CollisionTraverser()
      base.pusher = CollisionHandlerPusher()
      base.pusher.setHorizontal(False)
      base.handler = CollisionHandlerQueue()

      self.pickerNode=CollisionNode('mouseRay')
      self.pickerNP=base.camera.attachNewNode(self.pickerNode)
      self.pickerNode.setFromCollideMask(BitMask32.bit(0))
      self.pickerNode.setIntoCollideMask(BitMask32.allOff())
      self.pickerRay=CollisionRay()
      self.pickerNode.addSolid(self.pickerRay)
      base.cTrav.addCollider(self.pickerNP, base.handler)
###############################################################################

      if (self.keyMap["shoot"]!=0):
          self.mpos=base.mouseWatcherNode.getMouse()
          self.pickerRay.setFromLens(base.camNode, self.mpos.getX(), self.mpos.getY())
          base.cTrav.traverse(render) 
          if base.handler.getNumEntries() > 0:
            base.handler.sortEntries()
            self.pickedObj=base.handler.getEntry(0).getIntoNodePath()
            self.pickedObj=self.pickedObj.findNetTag('myObjectTag')
            if not self.pickedObj.isEmpty(): 
              print "shoot"
2

The problem is probably this line:

self.pickerNode.setFromCollideMask(BitMask32.bit(0))

That turns off your picker ray as a from object so the handler never actually works. Give the from mask any number other than zero.

3

Actually, it says BitMask32.bit(0) which means the first bit is on, actually, so it is enabled. BitMask32(0) would have been a zero bitmask.

4

Ty all. So maybe its in another part of my code, i’ll play around with it, I think I got the problem actully now, let me test some of the code.

KK yea it was cus of my CollisionSphere blocking the ray from sending out. So I turn it off using

cnodePath.node().setIntoCollideMask(BitMask32.allOff())