169 lines
5.5 KiB
Python
169 lines
5.5 KiB
Python
#!/usr/bin/env python
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'''
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Demonstrate usage of flight stick
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In this sample you can use a flight stick to control the camera and show some
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messages on screen. You can accelerate using the throttle.
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'''
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from direct.showbase.ShowBase import ShowBase
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from panda3d.core import TextNode, InputDevice, loadPrcFileData, Vec3
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from direct.gui.OnscreenText import OnscreenText
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loadPrcFileData("", """
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default-fov 60
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notify-level-device debug
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""")
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STICK_DEAD_ZONE = 0.02
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THROTTLE_DEAD_ZONE = 0.02
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class App(ShowBase):
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def __init__(self):
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ShowBase.__init__(self)
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# Print all events sent through the messenger
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#self.messenger.toggleVerbose()
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self.lblWarning = OnscreenText(
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text = "No devices found",
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fg=(1,0,0,1),
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scale = .25)
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self.lblAction = OnscreenText(
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text = "Action",
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fg=(1,1,1,1),
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scale = .15)
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self.lblAction.hide()
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# Is there a gamepad connected?
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self.flightStick = None
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devices = self.devices.getDevices(InputDevice.DeviceClass.flight_stick)
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if devices:
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self.connect(devices[0])
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self.currentMoveSpeed = 0.0
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self.maxAccleration = 28.0
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self.deaccleration = 10.0
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self.deaclerationBreak = 37.0
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self.maxSpeed = 80.0
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# Accept device dis-/connection events
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self.accept("connect-device", self.connect)
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self.accept("disconnect-device", self.disconnect)
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self.accept("escape", exit)
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self.accept("flight_stick0-start", exit)
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# Accept button events of the first connected flight stick
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self.accept("flight_stick0-trigger", self.action, extraArgs=["Trigger"])
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self.accept("flight_stick0-trigger-up", self.actionUp)
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self.environment = loader.loadModel("environment")
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self.environment.reparentTo(render)
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# disable pandas default mouse-camera controls so we can handle the camera
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# movements by ourself
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self.disableMouse()
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self.reset()
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self.taskMgr.add(self.moveTask, "movement update task")
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def connect(self, device):
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"""Event handler that is called when a device is discovered."""
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# We're only interested if this is a flight stick and we don't have a
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# flight stick yet.
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if device.device_class == InputDevice.DeviceClass.flight_stick and not self.flightStick:
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print("Found %s" % (device))
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self.flightStick = device
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# Enable this device to ShowBase so that we can receive events.
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# We set up the events with a prefix of "flight_stick0-".
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self.attachInputDevice(device, prefix="flight_stick0")
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# Hide the warning that we have no devices.
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self.lblWarning.hide()
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def disconnect(self, device):
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"""Event handler that is called when a device is removed."""
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if self.flightStick != device:
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# We don't care since it's not our gamepad.
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return
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# Tell ShowBase that the device is no longer needed.
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print("Disconnected %s" % (device))
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self.detachInputDevice(device)
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self.flightStick = None
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# Do we have any other gamepads? Attach the first other gamepad.
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devices = self.devices.getDevices(InputDevice.DeviceClass.flight_stick)
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if devices:
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self.connect(devices[0])
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else:
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# No devices. Show the warning.
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self.lblWarning.show()
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def reset(self):
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"""Reset the camera to the initial position."""
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self.camera.setPosHpr(0, -200, 10, 0, 0, 0)
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def action(self, button):
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# Just show which button has been pressed.
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self.lblAction.text = "Pressed %s" % button
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self.lblAction.show()
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def actionUp(self):
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# Hide the label showing which button is pressed.
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self.lblAction.hide()
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def moveTask(self, task):
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dt = globalClock.getDt()
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if not self.flightStick:
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return task.cont
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if self.currentMoveSpeed > 0:
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self.currentMoveSpeed -= dt * self.deaccleration
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if self.currentMoveSpeed < 0:
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self.currentMoveSpeed = 0
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# Accelerate using the throttle. Apply deadzone of 0.01.
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throttle = self.flightStick.findAxis(InputDevice.Axis.throttle).value
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if abs(throttle) < THROTTLE_DEAD_ZONE:
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throttle = 0
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accleration = throttle * self.maxAccleration
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if self.currentMoveSpeed > throttle * self.maxSpeed:
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self.currentMoveSpeed -= dt * self.deaccleration
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self.currentMoveSpeed += dt * accleration
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# Steering
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# Control the cameras yaw/Headding
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stick_yaw = self.flightStick.findAxis(InputDevice.Axis.yaw)
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if abs(stick_yaw.value) > STICK_DEAD_ZONE:
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base.camera.setH(base.camera, 100 * dt * stick_yaw.value)
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# Control the cameras pitch
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stick_y = self.flightStick.findAxis(InputDevice.Axis.pitch)
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if abs(stick_y.value) > STICK_DEAD_ZONE:
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base.camera.setP(base.camera, 100 * dt * stick_y.value)
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# Control the cameras roll
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stick_x = self.flightStick.findAxis(InputDevice.Axis.roll)
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if abs(stick_x.value) > STICK_DEAD_ZONE:
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base.camera.setR(base.camera, 100 * dt * stick_x.value)
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# calculate movement
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base.camera.setY(base.camera, dt * self.currentMoveSpeed)
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# Make sure camera does not go below the ground.
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if base.camera.getZ() < 1:
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base.camera.setZ(1)
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return task.cont
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app = App()
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app.run()
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