Panda3D基础实例
创建一个简单的Panda3D场景，加载一个模型并显示：
from direct.showbase.ShowBase import ShowBase
class MyApp(ShowBase):
def __init__(self):
ShowBase.__init__(self)
self.scene = self.loader.loadModel("models/environment")
self.scene.reparentTo(self.render)
self.scene.setScale(0.25, 0.25, 0.25)
self.scene.setPos(-8, 42, 0)
app = MyApp()
app.run()
键盘控制实例
实现键盘控制模型移动：
from direct.showbase.ShowBase import ShowBase
from direct.actor.Actor import Actor
class MyApp(ShowBase):
def __init__(self):
ShowBase.__init__(self)
self.panda = Actor("models/panda-model", {"walk": "models/panda-walk"})
self.panda.reparentTo(self.render)
self.panda.loop("walk")
self.accept("arrow_left", self.turnLeft)
self.accept("arrow_right", self.turnRight)
self.accept("arrow_up", self.moveForward)
self.accept("arrow_down", self.moveBackward)
def turnLeft(self):
self.panda.setH(self.panda.getH() + 5)
def turnRight(self):
self.panda.setH(self.panda.getH() - 5)
def moveForward(self):
self.panda.setY(self.panda, -0.5)
def moveBackward(self):
self.panda.setY(self.panda, 0.5)
app = MyApp()
app.run()
碰撞检测实例
实现简单的碰撞检测系统：
from direct.showbase.ShowBase import ShowBase
from panda3d.core import CollisionTraverser, CollisionNode
from panda3d.core import CollisionHandlerQueue, CollisionRay
class MyApp(ShowBase):
def __init__(self):
ShowBase.__init__(self)
self.cTrav = CollisionTraverser()
self.picker = CollisionRay()
pickerNode = CollisionNode('mouseRay')
pickerNode.addSolid(self.picker)
self.pickerNP = self.camera.attachNewNode(pickerNode)
self.pickerQueue = CollisionHandlerQueue()
self.cTrav.addCollider(self.pickerNP, self.pickerQueue)
self.accept("mouse1", self.handleClick)
def handleClick(self):
if self.pickerQueue.getNumEntries() > 0:
self.pickerQueue.sortEntries()
pickedObj = self.pickerQueue.getEntry(0).getIntoNodePath()
print("Clicked on:", pickedObj.getName())
app = MyApp()
app.run()
光照效果实例
添加多种光源到场景中：
from direct.showbase.ShowBase import ShowBase
from panda3d.core import AmbientLight, DirectionalLight, PointLight
class MyApp(ShowBase):
def __init__(self):
ShowBase.__init__(self)
self.scene = self.loader.loadModel("models/environment")
self.scene.reparentTo(self.render)
# 环境光
ambientLight = AmbientLight("ambientLight")
ambientLight.setColor((0.2, 0.2, 0.2, 1))
self.render.setLight(self.render.attachNewNode(ambientLight))
# 方向光
directionalLight = DirectionalLight("directionalLight")
directionalLight.setColor((0.8, 0.8, 0.5, 1))
directionalLight.setShadowCaster(True, 512, 512)
dlnp = self.render.attachNewNode(directionalLight)
dlnp.setHpr(45, -45, 0)
self.render.setLight(dlnp)
# 点光源
pointLight = PointLight("pointLight")
pointLight.setColor((1, 0.5, 0.5, 1))
plnp = self.render.attachNewNode(pointLight)
plnp.setPos(10, 10, 10)
self.render.setLight(plnp)
app = MyApp()
app.run()
粒子系统实例
创建简单的粒子效果：
from direct.showbase.ShowBase import ShowBase
from panda3d.core import ParticlePool, ParticleSystem
from panda3d.core import PointParticles, SpriteParticleRenderer
from panda3d.core import BaseParticleEmitter, RingEmitter
class MyApp(ShowBase):
def __init__(self):
ShowBase.__init__(self)
self.particles = ParticleSystem()
self.particles.setPoolSize(100)
renderer = SpriteParticleRenderer("particle.png")
self.particles.addRenderer(renderer)
emitter = RingEmitter()
emitter.setAngle(10)
emitter.setRadius(1)
emitter.setEmissionRate(20)
emitter.setLitterSize(5)
self.particles.addEmitter(emitter)
self.particles.reparentTo(self.render)
self.particles.setPos(0, 10, 0)
self.particles.enable()
app = MyApp()
app.run()
物理引擎实例
使用Bullet物理引擎创建物理场景：
from direct.showbase.ShowBase import ShowBase
from panda3d.bullet import BulletWorld, BulletPlaneShape
from panda3d.bullet import BulletBoxShape, BulletRigidBodyNode
from panda3d.core import Vec3
class MyApp(ShowBase):
def __init__(self):
ShowBase.__init__(self)
self.world = BulletWorld()
self.world.setGravity(Vec3(0, 0, -9.81))
# 创建地面
shape = BulletPlaneShape(Vec3(0, 0, 1), 0)
node = BulletRigidBodyNode('Ground')
node.addShape(shape)
np = self.render.attachNewNode(node)
np.setPos(0, 0, 0)
self.world.attachRigidBody(node)
# 创建盒子
shape = BulletBoxShape(Vec3(0.5, 0.5, 0.5))
node = BulletRigidBodyNode('Box')
node.addShape(shape)
node.setMass(1.0)
np = self.render.attachNewNode(node)
np.setPos(0, 0, 10)
self.world.attachRigidBody(node)
self.taskMgr.add(self.updatePhysics, 'updatePhysics')
def updatePhysics(self, task):
dt = globalClock.getDt()
self.world.doPhysics(dt)
return task.cont
app = MyApp()
app.run()
GUI界面实例
创建简单的GUI界面：
from direct.showbase.ShowBase import ShowBase
from direct.gui.DirectGui import DirectButton, DirectLabel
class MyApp(ShowBase):
def __init__(self):
ShowBase.__init__(self)
self.label = DirectLabel(text="Panda3D GUI Demo",
scale=0.1,
pos=(0, 0, 0.8))
self.button = DirectButton(text="Click Me",
scale=0.1,
pos=(0, 0, 0),
command=self.buttonPressed)
def buttonPressed(self):
self.label["text"] = "Button was clicked!"
app = MyApp()
app.run()
动画混合实例
混合多个动画序列：
from direct.showbase.ShowBase import ShowBase
from direct.actor.Actor import Actor
class MyApp(ShowBase):
def __init__(self):
ShowBase.__init__(self)
self.panda = Actor("models/panda-model",
{"walk": "models/panda-walk",
"dance": "models/panda-dance"})
self.panda.reparentTo(self.render)
self.panda.setPos(0, 0, 0)
# 混合动画
self.panda.enableBlend()
self.panda.setBlend(frameBlend=True)
self.panda.setControlEffect("walk", 0.5)
self.panda.setControlEffect("dance", 0.5)
self.panda.loop("walk")
self.panda.loop("dance")
self.accept("w", self.setWalkWeight, [1.0])
self.accept("d", self.setDanceWeight, [1.0])
self.accept("s", self.setBothWeight, [0.5])