class Plugin(PandaSteerPlugin):
"""PandaSteer plugin demonstrating seek and flee steering behaviors."""
def __init__(self):
"""Initialise the plugin."""
PandaSteerPlugin.__init__(self)
self.numVehicles = 6
self.text = """"""
self.obstaclesOn = True
self.text = """Path Following:
Six vehicles follow two overlapping paths at different speeds.
Characters can steer around obstacles and other characters that intersect their
path (but cannot handle an obstacle that covers a waypoint).
This is a very primitive path following behaviour. A path is a list of 2D
waypoints. Characters first seek toward the nearest waypoint on the path, then
seek toward each following waypoint in turn. Because characters don't anticipate
the change of direction when passing a waypoint they may overshoot if moving too
fast, then have to find their way back to the path. When reaching the end of the
path, characters can either loop back to the first waypoint or can arrive and
stop at the final waypoint.
"""
def restart(self):
"""Start or restart the plugin."""
self.draw = Draw() # Utility for drawing 2D lines and shapes in 3-space
path = Path([Vec2(40,40),Vec2(40,-40),Vec2(-40,40),Vec2(-40,-40)])
for vehicle in self.vehicles[:3]:
vehicle._pos = SteerVec((random.random()-0.5)*100,(random.random()-0.5)*100)
vehicle._velocity = SteerVec((random.random()-0.5)*2,(random.random()-0.5)*2)
vehicle.followPath(path,loop=True)
c=(.6,.6,.6,.3)
t=1
z=1.5
self.draw.drawLine(Vec3(path[0].getX(),path[0].getY(),z),Vec3(path[1].getX(),path[1].getY(),z),color=c,thickness=t)
self.draw.drawLine(Vec3(path[1].getX(),path[1].getY(),z),Vec3(path[2].getX(),path[2].getY(),z),color=c,thickness=t)
self.draw.drawLine(Vec3(path[2].getX(),path[2].getY(),z),Vec3(path[3].getX(),path[3].getY(),z),color=c,thickness=t)
self.draw.drawLine(Vec3(path[3].getX(),path[3].getY(),z),Vec3(path[0].getX(),path[0].getY(),z),color=c,thickness=t)
path = Path([Vec2(-40,-40),Vec2(40,-40),Vec2(-40,40),Vec2(40,40)])
for vehicle in self.vehicles[3:]:
vehicle._pos = SteerVec((random.random()-0.5)*100,(random.random()-0.5)*100)
vehicle._velocity = SteerVec((random.random()-0.5)*2,(random.random()-0.5)*2)
vehicle.followPath(path,loop=True)
self.draw.drawLine(Vec3(path[0].getX(),path[0].getY(),z),Vec3(path[1].getX(),path[1].getY(),z),color=c,thickness=t)
self.draw.drawLine(Vec3(path[1].getX(),path[1].getY(),z),Vec3(path[2].getX(),path[2].getY(),z),color=c,thickness=t)
self.draw.drawLine(Vec3(path[2].getX(),path[2].getY(),z),Vec3(path[3].getX(),path[3].getY(),z),color=c,thickness=t)
self.draw.drawLine(Vec3(path[3].getX(),path[3].getY(),z),Vec3(path[0].getX(),path[0].getY(),z),color=c,thickness=t)
for vehicle in self.vehicles:
vehicle.avoidObstacles = True
vehicle.avoidVehicles = True
vehicle.maxforce = 0.1
vehicle.maxspeed = 0.5 + (random.random()/2)
node = self.draw.create()
np = NodePath(node)
np.reparentTo(render)
