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Check if SCNNode SCNAction is finished

I have created a SceneKit 3D maze world in which a player can move. Some of the moves like jumping involve moving the camera up and down while changing to view direction over a period of time of several seconds. During this time I would like to ignore taps and swipes by the user that would normally result in other types of movements like turning and moving forward.

I could create a timer that matches the jump duration and sets a Bool but I was hoping for a simplier way of checking the SCNNode for the camera.

Is there a simple way to see if the SCNNode for the camera is no longer running the SCNAction for the jump so I can add this logic in front of other tap and swipe actions?

Or perhaps there is an SCNAction that could set the Bool that I could put at the start and finish of my jump sequence?

Here is my jump code:

        let jumpUp: SCNAction = SCNAction.move(to: SCNVector3Make(Float(Int(-yPos)), Float(Int(xPos)), jumpHeight), duration: jumpTime)
        let jumpAppex: SCNAction = SCNAction.wait(duration: jumpWaitTime)
        let fallDown: SCNAction = SCNAction.move(to: SCNVector3Make(Float(Int(-yPos)), Float(Int(xPos)), cameraHeight), duration: jumpTime)

        var lookDown: SCNAction = SCNAction.rotateTo(x: 0, y: 0, z: CGFloat(π), duration: jumpTurnTime)
        let noLook: SCNAction = SCNAction.wait(duration: jumpTime*2.0)
        var lookBack: SCNAction = SCNAction.rotateTo(x: 0, y: 0, z: 0, duration: jumpTurnTime)

        switch playerDirection.direction
        {
            case .south:
                lookDown = SCNAction.rotateTo(x: 0, y: 0, z: CGFloat(southZ), duration: jumpTurnTime)
                lookBack = SCNAction.rotateTo(x: CGFloat(π/2), y: 0, z: CGFloat(southZ), duration: jumpTurnTime)
            case .north:
                lookDown = SCNAction.rotateTo(x: 0, y: 0, z: CGFloat(northZ), duration: jumpTurnTime)
                lookBack = SCNAction.rotateTo(x: CGFloat(π/2), y: 0, z: CGFloat(northZ), duration: jumpTurnTime)
            case .east:
                lookDown = SCNAction.rotateTo(x: 0, y: 0, z: CGFloat(eastZ), duration: jumpTurnTime)
                lookBack = SCNAction.rotateTo(x: CGFloat(π/2), y: 0, z: CGFloat(eastZ), duration: jumpTurnTime)
            case .west:
                lookDown = SCNAction.rotateTo(x: 0, y: 0, z: CGFloat(westZ), duration: jumpTurnTime)
                lookBack = SCNAction.rotateTo(x: CGFloat(π/2), y: 0, z: CGFloat(westZ), duration: jumpTurnTime)
        }

        let sequenceJump = SCNAction.sequence([jumpUp, jumpAppex, fallDown])
        let sequenceLook = SCNAction.sequence([lookDown, noLook, lookBack])

        mazeScene.mazeCamera.runAction(sequenceJump)
        mazeScene.mazeCamera.runAction(sequenceLook)

Thanks

Greg

Solution

  • I ended up using a .customAction:

    I added a class variable isJumping

    then at front of the function code I added:

     isJumping = true

    and added the SCNAction:

     let jumpDone: SCNAction = SCNAction.customAction(duration: 0, action: {_,_ in self.isJumping = false})

    then changed the sequence to:

     let sequenceLook = SCNAction.sequence([lookDown, noLook, lookBack, jumpDone])

    then I just do an if on isJumping to see if the jump movement has completed.