Actually intervals are unnecessary to move. Surprisingly, the panda offers unpopular textbook solutions. Intervals have a problem, the time that the panda is trying to calculate to move is not constant for each frame. Object properties are also blocked, for example, you cannot control the Z axis. Use task manager for this purpose.
I changed the code:
from math import pi, sin, cos
from direct.showbase.ShowBase import ShowBase
from direct.task import Task
from direct.actor.Actor import Actor
class MyApp(ShowBase):
def __init__(self):
ShowBase.__init__(self)
# Disable the camera trackball controls.
self.disableMouse()
# Load the environment model.
self.scene = self.loader.loadModel("models/environment")
# Reparent the model to render.
self.scene.reparentTo(self.render)
# Apply scale and position transforms on the model.
self.scene.setScale(0.25, 0.25, 0.25)
self.scene.setPos(-8, 42, 0)
# Add the spinCameraTask procedure to the task manager.
self.taskMgr.add(self.spinCameraTask, "SpinCameraTask")
# Load and transform the panda actor.
self.pandaActor = Actor("models/panda-model", {"walk": "models/panda-walk4"})
self.pandaActor.setScale(0.005, 0.005, 0.005)
self.pandaActor.setPos(0, 10, 0)
self.pandaActor.reparentTo(self.render)
# Loop its animation.
self.pandaActor.loop("walk")
# Run 1 interval
self.taskMgr.add(self.pandaPosInterval1, "pandaPosInterval1")
#Moving speed
self.speed = 1
#Rotational speed
self.rotational = 50
def pandaPosInterval1(self, task):
if self.pandaActor.getY() <= -10:
self.pandaActor.setY(-10)# Stop the increase in error over time.
self.taskMgr.add(self.pandaRotation1, "pandaRotation1")
return Task.done
else:
self.pandaActor.setY(self.pandaActor.getY()-self.speed*globalClock.getDt())
return Task.cont
def pandaRotation1(self, task):
if self.pandaActor.getH() >= 180:
self.pandaActor.setH(180)# Stop the increase in error over time.
self.taskMgr.add(self.pandaPosInterval2, "pandaPosInterval2")
return Task.done
else:
self.pandaActor.setH(self.pandaActor.getH()+self.rotational*globalClock.getDt())
return Task.cont
def pandaPosInterval2(self, task):
if self.pandaActor.getY() >= 10:
self.pandaActor.setY(10) # Stop the increase in error over time.
self.taskMgr.add(self.pandaRotation2, "pandaRotation2")
return Task.done
else:
self.pandaActor.setY(self.pandaActor.getY()+self.speed*globalClock.getDt())
return Task.cont
def pandaRotation2(self, task):
if self.pandaActor.getH() <= 0:
self.pandaActor.setH(0)# Stop the increase in error over time.
self.taskMgr.add(self.pandaPosInterval1, "pandaPosInterval1")
return Task.done
else:
self.pandaActor.setH(self.pandaActor.getH()-self.rotational*globalClock.getDt())
return Task.cont
# Define a procedure to move the camera.
def spinCameraTask(self, task):
angleDegrees = task.time * 6.0
angleRadians = angleDegrees * (pi / 180.0)
self.camera.setPos(20 * sin(angleRadians), -20.0 * cos(angleRadians), 3)
self.camera.setHpr(angleDegrees, 0, 0)
return Task.cont
app = MyApp()
app.run()