class GameModel:
#Represents the world data.
def __init__(self, base, mapNo):
self.isListening = False
# Holds rigid bodies, joints, controls global params
self.world = OdeWorld()
self.world.setGravity(0, 0, -9.8)
st = SurfaceType()
st.load(self.world)
del st
self.contactgroup = OdeJointGroup()
self.space = OdeHashSpace()
self.space.setAutoCollideWorld(self.world)
self.space.setAutoCollideJointGroup(self.contactgroup)
self.space.setCollisionEvent(EventType.ODE_COLLISION)
base.accept(EventType.ODE_COLLISION, self.onCollision)
self.ball = Ball(self.world, self.space, "Johanneksen pallo")
self.level = Level(self, mapNo)
self.player = Player("Johannes")
self.camera = Camera(base, self.ball)
def turnGravityTask(self):
''''''
g = self.world.getGravity()
g = -g
self.world.setGravity(g)
self.camera.turn()
def turnGravityTask2(self):
''''''
g = self.world.getGravity()
g2 = self.ball.perpendicularUnitVec3WithFixedX(g)
g2 *= g.length()
self.world.setGravity(g2)
def updateObjects(self):
'''
Update objects after one physics iteration
@see GameLoop.simulationTask
'''
self.level.updateModelNode()
self.camera.updateModelNode()
#Has to be last for RESTART to work inside Ball
self.ball.updateModelNode()
def getBall(self):
return self.ball
def getPlayer(self):
return self.player
# http://www.panda3d.org/wiki/index.php/Collision_Detection_with_ODE
def onCollision(self, entry):
geom1 = entry.getGeom1()
geom2 = entry.getGeom2()
body1 = entry.getBody1()
body2 = entry.getBody2()
# Is the ball touching something?
if body1 == self.ball.getBody() or body2 == self.ball.getBody():
self.ball.refreshCollisionTime(entry)
for coin in self.level.getCoins():
if body1 == coin.getBody() and body2 == self.ball.getBody():
coin.collect()
messenger.send(EventType.UPDATE_HUD)
exit = self.level.getExit()
if geom1 == exit or geom2 == exit:
if Coin.collectable == self.level.getGoal():
# todo: make event based
messenger.send(EventType.NEXT_LEVEL)
def cleanUp(self):
self.level.removeLevel()
self.ball.removeNode()
class World:
def __init__(self, game):
self.game = game
self.world = OdeWorld()
self.world.setGravity(0, 0, -9.81 * 3)
self.group = OdeJointGroup()
self.space = OdeHashSpace()
self.space.setAutoCollideWorld(self.world)
self.space.setAutoCollideJointGroup(self.group)
self.setSurfaceTables()
self.objects = []
self.objectsToRemove = []
self.postStepTasks = []
self.engineRunning = True
self.dtAccumulator = 0.0
self.physicsFps = 90
self.physicsMinFps = 10
base.taskMgr.doMethodLater(0.1, self.processPhysics, "Physics")
base.accept("escape", self.togglePhysics)
self.space.setCollisionEvent("odeCollision")
base.accept("odeCollision", self.onCollision)
def setSurfaceTables(self):
self.surfaces = {}
self.surfaces["plane"] = 0
self.surfaces["box"] = 1
self.surfaces["sphere"] = 2
self.surfaces["bullet"] = 3
n = len(self.surfaces)
self.world.initSurfaceTable(n)
for i in range(n):
for j in range(n):
# id1, id2, mu (0 to inf), bounce (1 = bouncy), min_bounce_vel, erp (1 = hard), cfm (0 = hard), slip, dampen
# sample: 150, 0.0, 9.1, 0.9, 0.00001, 0.0, 0.002
self.world.setSurfaceEntry(i, j, 10.0, 1.0, 0.0, 0.9, 0.0, 0.5, 0.001) # Default value for unspecified pairs.
self.world.setSurfaceEntry(self.surfaces["box"], self.surfaces["box"],
200.0, 0.2, 0.3, 1.0, 0.0, 0.0, 0.01)
self.world.setSurfaceEntry(self.surfaces["plane"], self.surfaces["box"],
200.0, 0.2, 0.3, 1.0, 0.0, 0.0, 0.01)
self.world.setSurfaceEntry(self.surfaces["box"], self.surfaces["bullet"],
10.0, 0.1, 0.5, 1.0, 0.0, 0.0, 0.01)
self.world.setSurfaceEntry(self.surfaces["plane"], self.surfaces["bullet"],
100.0, 0.01, 0.1, 1.0, 0.0, 0.0, 1.0)
def addObject(self, obj):
self.objects.append(obj)
def removeObject(self, obj):
if obj not in self.objectsToRemove:
self.objectsToRemove.append(obj)
def removeDestroyedObjects(self):
while len(self.objectsToRemove) > 0:
obj = self.objectsToRemove.pop()
if obj in self.objects:
self.objects.remove(obj)
obj.doDestroy()
def togglePhysics(self):
self.engineRunning = not self.engineRunning
self.dtAccumulator = 0.0
def processPhysics(self, task):
stepSize = 1.0 / self.physicsFps
maxDt = 1.0 / self.physicsMinFps
if self.engineRunning:
self.dtAccumulator += globalClock.getDt()
self.dtAccumulator = min(self.dtAccumulator, maxDt)
while self.dtAccumulator >= stepSize:
self.space.autoCollide()
self.world.quickStep(stepSize)
for obj in self.objects:
obj.updatePosFromPhysics()
self.group.empty()
self.performPostStepTasks()
self.removeDestroyedObjects()
self.dtAccumulator -= stepSize
return task.cont
def onCollision(self, entry):
body1 = entry.getBody1()
body2 = entry.getBody2()
if not body1.isEmpty():
body1.getData().onCollision(body2, entry)
if not body2.isEmpty():
body2.getData().onCollision(body1, entry)
def performAfterStep(self, method, params):
self.postStepTasks.append([method, params])
def performPostStepTasks(self):
for task in self.postStepTasks:
method = task[0]
params = task[1]
method(*params)
self.postStepTasks = []