Table of Contents
All client-side movement is done using the physics object that acts like a controller, sending position updates to the server.
The navigation mesh is not present on the client, so the functions
seek() and chase() must be
used. They provide simple direct movement, following the terrain and
colliding with obstacles.
In this example we will use seek to implement a simple mouse click-based movement.
To access this functionality in the FantasyDemo, press Z to bring up the cursor, and right-click on the terrain to move.
def moveKey( self, isDown ): if isDown: mp = GUI.mcursor().position type, target = collide.collide( mp.x, mp.y ) if type == collide.COLLIDE_TERRAIN: self._movePlayer( target ) elif type == collide.COLLIDE_ENTITY: self._movePlayer( target.position ) def _movePlayer( self, position ): player = BigWorld.player() velocity = player.runFwdSpeed timeout = 1.5 * (position - player.position).length / velocity curr_yaw = (position - player.position).yaw destination = (position[0], position[1], position[2], curr_yaw) player.physics.velocity = (0, 0, velocity) player.physics.seek( destination, timeout, 10, self._seekCallback ) self.isMoving = True
client/MouseControl.py
Note
The destination needed by seek() is a
four-member tuple containing the position and yaw.
The seek method is often used in conjunction with coordinated actions. These are actions involving two models, such as a handshake.
The position and yaw needed for the actions to line up can be extracted from the action, as in the following excerpt:
self.physics.seek( partner.model.Shake_B_Accept.seekInv, 5.0, 0.10, onSeek ) self.physics.velocity = ( 0, 0, self.walkFwdSpeed )
client/Avatar.py
To demonstrate the chase function we will implement a /follow chat console command in FantasyDemo. The command will cause the player to follow the targeted entity, until they press a movement key breaking the pursuit.
The Fantasy Demo chat console will automatically resolve the typed ‘/follow’ command to a function call. All we need to do is add the following function to the ConsoleCommands.py module.
def follow( player, string ):
# Follow the current target
if BigWorld.target() != None:
player.physics.chase( BigWorld.target(), 2.0, 0.5 )
player.physics.velocity = ( 0, 0, 6.0 )client/Helpers/ConsoleCommands.py
To cancel the chase action, we need to add the code below to PlayerAvatar's moveForward, moveBackward, moveLeft and moveRight functions as in the excerpt below.
def moveForward(self, isDown):
if isDown:
if self.mouseControl.isMoving:
self.mouseControl.cancel()
if self.physics.chasing:
self.physics.stop()
self.forwardMagnitude = min(self.forwardMagnitude+1.0,1.0)
if self.mode == Mode.COMBAT_CLOSE:
if self.stance == Avatar.STANCE_BACKWARD:
nst = Avatar.STANCE_NEUTRAL
else:
nst = Avatar.STANCE_FORWARD
self.takeStance( nst )
else:
self.forwardMagnitude = max(self.forwardMagnitude-1.0,-1.0)client/Avatar.py