def __init__(self):
self.flag = scn.Sphere(0.05)
self.particleSystem = scn.ParticleSystem()
self.particleSystem.loops = True
self.particleSystem.birthRate = 550
self.particleSystem.emissionDuration = 2
self.particleSystem.particleLifeSpan = 0.18
self.particleSystem.particleLifeSpanVariation = 0.29
self.particleSystem.particleVelocity = 8
self.particleSystem.particleVelocityVariation = 15
self.particleSystem.particleSize = 0.04
self.particleSystem.particleSizeVariation = 0.03
self.particleSystem.stretchFactor = 0.02
self.particleSystemColorAnim = scn.CoreKeyframeAnimation()
self.particleSystemColorAnim.values = [(.99, 1.0, .71, 0.8),
(1.0, .52, .0, 0.8),
(1., .0, .1, 1.),
(.78, .0, .0, 0.3)]
self.particleSystemColorAnim.keyTimes = (0., 0.1, 0.8, 1.)
self.particleSystemProp_con = scn.ParticlePropertyController.controllerWithAnimation(
self.particleSystemColorAnim)
self.particleSystem.propertyControllers = {
scn.SCNParticlePropertyColor: self.particleSystemProp_con
}
self.particleSystem.emitterShape = self.flag
self.particleSystem.birthLocation = scn.ParticleBirthLocation.SCNParticleBirthLocationSurface
self.particleSystem.birthDirection = scn.ParticleBirthDirection.Random
def main(self):
self.main_view = ui.View()
w, h = ui.get_window_size()
self.main_view.frame = (0, 0, w, h)
self.main_view.name = 'vehicle demo'
self.close_button = ui.Button()
self.close_button.action = self.close
self.close_button.frame = (20, 40, 40, 40)
self.close_button.background_image = ui.Image.named('emj:No_Entry_2')
if DEBUG:
self.scene_view = scn.View((0,25,w,h-25), superView=self.main_view)
self.scene_view.showsStatistics = True
else:
self.scene_view = scn.View((0, 0, w, h), superView=self.main_view)
self.scene_view.preferredFramesPerSecond = 30
self.scene_view.autoresizingMask = scn.ViewAutoresizing.FlexibleHeight | scn.ViewAutoresizing.FlexibleWidth
self.scene_view.allowsCameraControl = False
self.scene_view.scene = scn.Scene()
self.root_node = self.scene_view.scene.rootNode
self.scene_view.backgroundColor = (.77, .97, 1.0)
self.scene_view.delegate = self
self.physics_world = self.scene_view.scene.physicsWorld
self.physics_world.speed = 2.
self.physics_world.contactDelegate = self
if DEBUG:
marker1 = scn.Sphere(0.1)
marker1.firstMaterial.emission.contents = (1.0, .14, .14)
marker1.firstMaterial.diffuse.contents = (.0, .0, .0)
Demo.marker_node1 = scn.Node.nodeWithGeometry(marker1)
Demo.marker_node1.name = 'marker1'
self.root_node.addChildNode(Demo.marker_node1)
marker2 = scn.Sphere(0.1)
marker2.firstMaterial.emission.contents = (.17, .0, 1.0)
marker2.firstMaterial.diffuse.contents = (.0, .0, .0)
Demo.marker_node2 = scn.Node.nodeWithGeometry(marker2)
Demo.marker_node2.name = 'marker2'
self.root_node.addChildNode(Demo.marker_node2)
floor_geometry = scn.Floor()
floor_geometry.reflectivity = 0.05
tile_image = ui.Image.named('plf:Ground_DirtCenter')
tile_number = 5
tile_factor = scn.Matrix4(tile_number, 0.0, 0.0, 0.0, 0.0, tile_number, 0.0, 0.0, 0.0, 0.0, tile_number, 0.0, 0.0, 0.0, 0.0, 1.0)
floor_geometry.firstMaterial.diffuse.contents = tile_image
floor_geometry.firstMaterial.diffuse.intensity = 0.8
floor_geometry.firstMaterial.diffuse.contentsTransform = tile_factor
floor_geometry.firstMaterial.diffuse.wrapS, floor_geometry.firstMaterial.diffuse.wrapT = scn.WrapMode.Repeat, scn.WrapMode.Repeat
floor_geometry.firstMaterial.locksAmbientWithDiffuse = True
self.floor_node = scn.Node.nodeWithGeometry(floor_geometry)
self.floor_node.name = 'Floor'
self.floor_node.physicsBody = scn.PhysicsBody.staticBody()
self.root_node.addChildNode(self.floor_node)
cars = [dict(name='red', position=(5, 0, 0), volume=1.),
dict(name='yellow', too_far=25, body_color=(1.0, .78, .0), position=(-5, 0, -2), sound='game:Pulley', volume=0.1),
dict(name='blue', too_far=30, body_color=(.0, .61, 1.0), position=(-12, 0, -6), sound='game:Woosh_1', volume=0.5),
dict(name='green', too_far=18, body_color=(.0, .82, .28), position=(10, 0, -10), sound='casino:DiceThrow3', volume=0.8),
dict(name='pink', too_far=20, body_color=(.91, .52, .62), position=(5, 0, 10), sound='casino:DieThrow3', volume=0.5)]
self.cars =[Car(world=self, props=cars[i]) for i in range(min(MAXCARS, len(cars)))]
self.free_flags = []
for i in range(2*len(self.cars)):
node = scn.Node()
self.free_flags.append(node)
self.root_node.addChildNode(node)
self.used_flags = {}
self.crash = Sparks().particleSystem
self.crash_sound = scn.AudioSource('game:Crashing')
self.crash_action = scn.Action.playAudioSource(self.crash_sound, False)
self.road_blocks_node = scn.Node()
self.road_blocks = []
self.road_blocks.append(RoadBlock(w=1.6, l=25, name='block 0', position=(28, 6)))
self.road_blocks.append(RoadBlock(w=20, l=1.6, name='block 1', position=(-2, -12)))
self.road_blocks.append(RoadBlock(w=8, l=1.6, name='block 2', position=(-10, 6), rotation=-math.pi/6))
self.road_blocks.append(RoadBlock(w=40, l=1.6, name='block 3', position=(-40, 0), rotation=-math.pi/3))
self.road_blocks.append(RoadBlock(w=0.8, h=3, l=0.8, name='start', position=(0, 0)))
for aBlock in self.road_blocks: self.road_blocks_node.addChildNode(aBlock.block_node)
self.root_node.addChildNode(self.road_blocks_node)
self.camera_node = scn.Node()
self.camera_node.camera = scn.Camera()
self.camera_node.camera.zFar = 150
carPos = self.cars[0].node.position
self.camera_node.position = scn.Vector3(carPos.x+5, 10, carPos.z+30)
self.root_node.addChildNode(self.camera_node)
self.light_node = scn.Node()
self.light_node.position = (50, 50, 50)
self.light_node.lookAt(self.root_node.position)
self.light = scn.Light()
self.light.type = scn.LightTypeDirectional
self.light.castsShadow = True
self.light.shadowSampleCount = 16
self.light.color = (.95, 1.0, .98)
self.light_node.light = self.light
self.root_node.addChildNode(self.light_node)
self.ambient_node = scn.Node()
self.ambient = scn.Light()
self.ambient.type = scn.LightTypeAmbient
self.ambient.color = (.38, .42, .45, .1)
self.ambient_node.light = self.ambient
self.root_node.addChildNode(self.ambient_node)
self.scene_view.pointOfView = self.camera_node
if DEBUG: self.main_view.add_subview(Demo.status_label)
self.close = False
self.shut_down = False
self.main_view.add_subview(self.close_button)
self.main_view.present(hide_title_bar=~DEBUG)
def buildCar(self, body_color=None, sound_file=None, sound_volume=1.0):
self.chassis_node = scn.Node()
self.chassis_node.categoryBitMask = 1 << 1
self.camera_controller_node = scn.Node()
self.camera_node = scn.Node()
self.camera_node.position = (0, 1.6, 2.05)
self.camera_node.lookAt((0, 0.9, 10))
self.camera = scn.Camera()
self.camera.zNear = 0.25
self.camera.zFar = 10
self.camera.fieldOfView = 35
self.camera_node.camera = self.camera
self.camera_controller_node.addChildNode(self.camera_node)
self.chassis_node.addChildNode(self.camera_controller_node)
self.radar_p1L = scn.Vector3(1.2, 1.3, 2.05)
self.radar_p2L = scn.Vector3(4.5, 0.8, 20)
self.radar_pSL = scn.Vector3(10., 0.8, 2.4)
self.radar_p1R = scn.Vector3(-1.2, 1.3, 2.05)
self.radar_p2R = scn.Vector3(-4.5, 0.8, 20)
self.radar_pSR = scn.Vector3(-10., 0.8, 2.4)
self.body_material = scn.Material()
self.body_material.diffuse.contents = body_color
self.body_material.specular.contents = (.88, .88, .88)
self.body = scn.Box(2, 1, 4, 0.2)
self.body.firstMaterial = self.body_material
self.body_node = scn.Node.nodeWithGeometry(self.body)
self.body_node.position = (0, 0.75, 0)
self.chassis_node.addChildNode(self.body_node)
self.physicsBody = scn.PhysicsBody.dynamicBody()
self.physicsBody.allowsResting = False
self.physicsBody.mass = 1200
self.physicsBody.restitution = 0.1
self.physicsBody.damping = 0.3
self.chassis_node.physicsBody = self.physicsBody
self.top = scn.Box(1.6, 0.6, 1.8, 0.1)
self.top.firstMaterial = self.body_material
self.top_node = scn.Node.nodeWithGeometry(self.top)
self.top_node.position = (0, 0.5+0.2, 0)
self.body_node.addChildNode(self.top_node)
self.door1 = scn.Box(2.02, 1-0.2, 1.8/2.2, 0.08)
self.door1.firstMaterial = self.body_material
self.door1_node = scn.Node.nodeWithGeometry(self.door1)
self.door1_node.position = (0, 0.1, 1.8/4)
self.body_node.addChildNode(self.door1_node)
self.door2_node = scn.Node.nodeWithGeometry(self.door1)
self.door2_node.position = (0, 0.1, -1.8/4+0.1)
self.body_node.addChildNode(self.door2_node)
self.window_material = scn.Material()
self.window_material.diffuse.contents = (.64, .71, .75, 0.6)
self.window_material.specular.contents = (.88, .88, .88, 0.8)
self.sideW1 = scn.Box(1.61, 0.6-0.1, 1.8/2.2, 0.08)
self.sideW1.firstMaterial = self.window_material
self.sideW1_node = scn.Node.nodeWithGeometry(self.sideW1)
self.sideW1_node.position = (0, 0.5+0.2, 1.8/4)
self.body_node.addChildNode(self.sideW1_node)
self.sideW2_node = scn.Node.nodeWithGeometry(self.sideW1)
self.sideW2_node.position = (0, 0.5+0.2, -1.8/4+0.1)
self.body_node.addChildNode(self.sideW2_node)
self.window_materials = [scn.Material() for i in range(6)]
self.window_materials[0] = self.window_material
self.window_materials[2] = self.window_material
for i in [1, 3, 4, 5]:
self.window_materials[i] = self.body_material
alpha = math.pi/5
self.frontW = scn.Box(1.4, 0.6/math.cos(alpha), 0.1, 0.06)
self.frontW.materials = self.window_materials
self.frontW_node = scn.Node.nodeWithGeometry(self.frontW)
self.frontW_node.position = (0, 0.5+0.2-0.05, 1.8/2+math.tan(alpha)*0.6/2-0.1)
self.frontW_node.rotation = (1, 0, 0, -alpha)
self.body_node.addChildNode(self.frontW_node)
alpha = math.pi/5
self.frontW2 = scn.Box(1.3, 0.6/math.cos(alpha), 0.3, 0.0)
self.frontW2.firstMaterial = self.window_material
self.frontW2_node = scn.Node.nodeWithGeometry(self.frontW2)
self.frontW2_node.position = (0, 0.5+0.2-0.05-0.2, 1.8/2+math.tan(alpha)*0.6/2-0.08)
self.frontW2_node.rotation = (1, 0, 0, -alpha)
self.body_node.addChildNode(self.frontW2_node)
alpha = math.pi/3.2
self.rearW = scn.Box(1.4, 0.6/math.cos(alpha), 0.2, 0.2)
self.rearW.materials = self.window_materials
self.rearW_node = scn.Node.nodeWithGeometry(self.rearW)
self.rearW_node.position = (0, 0.5+0.2-0.0417, -1.8/2-math.tan(alpha)*0.6/2+0.15)
self.rearW_node.rotation = (1, 0, 0, alpha)
self.body_node.addChildNode(self.rearW_node)
alpha = math.pi/3.2
self.rearW2 = scn.Box(1.3, 0.6/math.cos(alpha), 0.3, 0.05)
self.rearW2.firstMaterial = self.window_material
self.rearW2_node = scn.Node.nodeWithGeometry(self.rearW2)
self.rearW2_node.position = (0, 0.5+0.2-0.05-0.2, -1.8/2-math.tan(alpha)*0.6/2+0.1)
self.rearW2_node.rotation = (1, 0, 0, alpha)
self.body_node.addChildNode(self.rearW2_node)
self.nose = scn.Pyramid(2-0.4, 0.15, 1-0.2)
self.nose.firstMaterial = self.body_material
self.nose_node = scn.Node.nodeWithGeometry(self.nose)
self.nose_node.position = (0, 0.75, 2-0.03)
self.nose_node.rotation = (1, 0, 0, math.pi/2)
self.chassis_node.addChildNode(self.nose_node)
self.lampBack_colors = [(.6, .0, .0), (1.0, .0, .0)]
self.front_spot = scn.Light()
self.front_spot.type = scn.LightTypeSpot
self.front_spot.castsShadow = False
self.front_spot.color = (1.0, 1.0, .95)
self.front_spot.spotInnerAngle = 20
self.front_spot.spotOuterAngle = 25
self.front_spot.attenuationEndDistance = 15
self.exhaust = scn.Tube(0.05, 0.07, 0.08)
self.exhaust.firstMaterial.metalness.contents = (.5, .5, .5)
self.exhaust_node = scn.Node.nodeWithGeometry(self.exhaust)
self.exhaust_node.position = (0.5, -0.42, -2.04)
self.exhaust_node.rotation = (1, 0, 0, math.pi/2)
self.body_node.addChildNode(self.exhaust_node)
self.smoke = scn.ParticleSystem()
self.smoke.emitterShape = scn.Sphere(0.01)
self.smoke.birthLocation = scn.ParticleBirthLocation.SCNParticleBirthLocationSurface
self.smoke.birthRate =6000
self.smoke.loops = True
self.smoke.emissionDuration = 0.08
self.smoke.idleDuration = 0.4
self.smoke.idleDurationVariation = 0.2
self.smoke.particleLifeSpan = 0.3
self.smoke.particleLifeSpanVariation = 1.2
self.smoke.particleColor = (1., 1., 1., 1.)
self.smoke.particleColorVariation = (.6, .0, .6, 0.)
self.smoke.blendMode = scn.ParticleBlendMode.Multiply
self.smoke.birthDirection = scn.ParticleBirthDirection.Random
self.smoke.particleVelocity = 2.
self.smoke.particleVelocityVariation = 3.5
self.smoke.acceleration = (0., 15, 0.)
self.sizeAnim = scn.CoreBasicAnimation()
self.sizeAnim.fromValue = 0.1
self.sizeAnim.toValue = 0.0
self.size_con = scn.ParticlePropertyController.controllerWithAnimation(self.sizeAnim)
self.smoke.propertyControllers = {scn.SCNParticlePropertySize:self.size_con}
self.smoker_node = scn.Node()
self.smoker_node.position = (0., -0.15, 0.)
self.smoker_node.addParticleSystem(self.smoke)
self.exhaust_node.addChildNode(self.smoker_node)
self.lamp = scn.Tube(0.12, 0.15, 4.07)
self.lamp.firstMaterial.metalness.contents = (.93, .93, .93)
self.lampGlasFront = scn.Sphere(0.13)
self.lampGlasFront.firstMaterial.emission.contents = (.92, .93, .66)
self.lampGlasBack = scn.Sphere(0.13)
self.lampGlasBack.firstMaterial.diffuse.contents = 'black'
self.lampGlasBack.firstMaterial.emission.contents = self.lampBack_colors[0]
self.lamp_nodeR = scn.Node.nodeWithGeometry(self.lamp)
self.lamp_nodeR.position = (-0.6, 0.75, 0.015)
self.lamp_nodeR.rotation = (1, 0, 0, math.pi/2)
self.chassis_node.addChildNode(self.lamp_nodeR)
self.lamp_nodeL = scn.Node.nodeWithGeometry(self.lamp)
self.lamp_nodeL.position = (0.6, 0.75, 0.015)
self.lamp_nodeL.rotation = (1, 0, 0, math.pi/2)
self.chassis_node.addChildNode(self.lamp_nodeL)
self.lampGlasFront_nodeR = scn.Node.nodeWithGeometry(self.lampGlasFront)
self.lampGlasFront_nodeR.position = (0, 1.95, 0)
self.lampGlasFront_nodeR.lookAt((0, 45, 10))
self.lampGlasFront_nodeR.light = self.front_spot
self.lamp_nodeR.addChildNode(self.lampGlasFront_nodeR)
self.lampGlasBack_nodeR = scn.Node.nodeWithGeometry(self.lampGlasBack)
self.lampGlasBack_nodeR.position = (0, -1.95, 0)
self.lamp_nodeR.addChildNode(self.lampGlasBack_nodeR)
self.lampGlasFront_nodeL = scn.Node.nodeWithGeometry(self.lampGlasFront)
self.lampGlasFront_nodeL.position = (0, 1.95, 0)
self.lampGlasFront_nodeL.lookAt((0, 45, 10))
self.lampGlasFront_nodeL.light = self.front_spot
self.lamp_nodeL.addChildNode(self.lampGlasFront_nodeL)
self.lampGlasBack_nodeL = scn.Node.nodeWithGeometry(self.lampGlasBack)
self.lampGlasBack_nodeL.position = (0, -1.95, 0)
self.lamp_nodeL.addChildNode(self.lampGlasBack_nodeL)
self.wheel_nodes = [scn.Node()]
self.tire = scn.Tube(0.12, 0.35, 0.25)
self.tire.firstMaterial.diffuse.contents = 'black'
self.wheel_nodes[0].position = (0.94, 0.4, 2-0.6)
self.tire_node = scn.Node.nodeWithGeometry(self.tire)
self.tire_node.rotation = (0, 0, 1, math.pi/2)
self.wheel_nodes[0].addChildNode(self.tire_node)
self.trace = scn.ParticleSystem()
self.trace.birthRate = 750
self.trace.loops = True
self.trace.emissionDuration = 0.1
self.trace.particleLifeSpan = 4.6
self.trace.particleLifeSpanVariation = 5
self.trace.particleSize = 0.02
self.trace.particleColor = (.1, .1, .1, 1.)
self.trace.particleColorVariation = (0.1, 0.1, 0.1, 0.1)
self.trace.blendMode = scn.ParticleBlendMode.Replace
self.trace.emitterShape = scn.Cylinder(0.02, 0.26)
self.trace.birthLocation = scn.ParticleBirthLocation.SCNParticleBirthLocationVolume
self.trace.handle(scn.ParticleEvent.Birth, [scn.ParticlePropertyPosition], self.traceParticleEventBlock)
self.tire_node.addParticleSystem(self.trace)
self.rim = scn.Cylinder(0.14, 0.1)
self.rim.firstMaterial.diffuse.contents = 'gray'
self.rim.firstMaterial.specular.contents = (.88, .88, .88)
self.rim_node = scn.Node.nodeWithGeometry(self.rim)
self.rim_node.name = 'rim'
self.rim_node.position = (0, 0.06, 0)
self.tire_node.addChildNode(self.rim_node)
self.rim_deco = scn.Text('Y', 0.05)
self.rim_deco.font = ('Arial Rounded MT Bold', 0.3)
self.rim_deco.firstMaterial.diffuse.contents = 'black'
self.rim_deco.firstMaterial.specular.contents = (.88, .88, .88)
self.rim_deco_node = scn.Node.nodeWithGeometry(self.rim_deco)
self.rim_deco_node.name = 'deco'
self.rim_deco_node.position = (-0.1, 0.03, -1.12)
self.rim_deco_node.rotation = (1, 0, 0, math.pi/2)
self.rim_node.addChildNode(self.rim_deco_node)
self.wheel_nodes.append(self.wheel_nodes[0].clone())
self.wheel_nodes[1].position = (-0.94, 0.4, 2-0.6)
self.wheel_nodes[1].childNodeWithName('rim', True).position = (0, -0.06, 0)
self.wheel_nodes[1].childNodeWithName('deco', True).position = (-0.1, -0.03, -1.12)
self.wheel_nodes[1].childNodeWithName('rim', True).rotation = (0, 1, 0, -math.pi/7)
self.wheel_nodes.append(self.wheel_nodes[0].clone())
self.wheel_nodes[2].position = (0.94, 0.4, -2+0.7)
self.wheel_nodes[2].childNodeWithName('rim', True).rotation = (0, 1, 0, math.pi/7)
self.wheel_nodes.append(self.wheel_nodes[0].clone())
self.wheel_nodes[3].position = (-0.94, 0.4, -2+0.7)
self.wheel_nodes[3].childNodeWithName('rim', True).position = (0, -0.06, 0)
self.wheel_nodes[3].childNodeWithName('deco', True).position = (-0.1, -0.03, -1.12)
self.wheel_nodes[3].childNodeWithName('rim', True).rotation = (0, 1, 0, math.pi/3)
for aNode in self.wheel_nodes: self.chassis_node.addChildNode(aNode)
self.wheels = [scn.PhysicsVehicleWheel(node=aNode) for aNode in self.wheel_nodes]
for i in [0, 1]: self.wheels[i].suspensionRestLength = 1.3
for i in [2, 3]: self.wheels[i].suspensionRestLength = 1.4
for aWheel in self.wheels: aWheel.maximumSuspensionTravel = 150
self.chassis_node.physicsBody.contactTestBitMask = scn.PhysicsCollisionCategory.Default.value
self.chassis_node.physicsBody.continuousCollisionDetectionThreshold = 2.
self.vehicle = scn.PhysicsVehicle(chassisBody=self.chassis_node.physicsBody, wheels=self.wheels)
self.physics_world.addBehavior(self.vehicle)
self.world.root_node.addChildNode(self.chassis_node)
if ENGINESOUND:
self.sound = scn.AudioSource(sound_file)
self.sound.load()
self.sound.loops = True
self.sound.volume = sound_volume
self.sound_player = scn.AudioPlayer.audioPlayerWithSource(self.sound)
self.chassis_node.addAudioPlayer(self.sound_player)
def setup_axes():
axis_rode = scn.Cylinder(0.015, 7.5)
axis_rode.firstMaterial.contents = 'blue'
vertical_axis_rode = scn.Cylinder(0.015, 11.)
vertical_axis_rode.firstMaterial.contents = 'blue'
rotate_control_geometry = scn.Sphere(0.35)
rotate_control_geometry.firstMaterial.contents = 'red'
cube_rotate_control_geometry = scn.Sphere(0.35)
cube_rotate_control_geometry.firstMaterial.contents = 'green'
shift_control_geometry = scn.Cone(0, 0.38, 0.7)
shift_control_geometry.firstMaterial.contents = 'orange'
axis_handle = scn.Node()
axis_handle.name = 'origo'
axis_handle.position = (-0.5, -0.5, 0.5)
x_axis_node = scn.Node.nodeWithGeometry(axis_rode)
x_axis_node.rotation = (0, 0, 1, math.pi / 2)
x_axis_node.position = (1.5, 0, 0)
x_axis_rotate_control_node_1 = scn.Node.nodeWithGeometry(
rotate_control_geometry)
x_axis_rotate_control_node_1.position = (0., -axis_rode.height / 2 + 1, 0.)
x_axis_rotate_control_node_1.name = 'rx1'
x_axis_rotate_control_node_1.categoryBitMask = 2
x_axis_node.addChildNode(x_axis_rotate_control_node_1)
x_axis_rotate_control_node_2 = scn.Node.nodeWithGeometry(
rotate_control_geometry)
x_axis_rotate_control_node_2.position = (0., axis_rode.height / 2 - 1, 0.)
x_axis_rotate_control_node_2.name = 'rx2'
x_axis_rotate_control_node_2.categoryBitMask = 2
x_axis_node.addChildNode(x_axis_rotate_control_node_2)
x_axis_shift_control_node_1 = scn.Node.nodeWithGeometry(
shift_control_geometry)
x_axis_shift_control_node_1.position = (0., -axis_rode.height / 2, 0.)
x_axis_shift_control_node_1.rotation = (0., 0., 1., -math.pi)
x_axis_shift_control_node_1.name = 'sx1'
x_axis_shift_control_node_1.categoryBitMask = 2
x_axis_node.addChildNode(x_axis_shift_control_node_1)
x_axis_shift_control_node_2 = scn.Node.nodeWithGeometry(
shift_control_geometry)
x_axis_shift_control_node_2.position = (0., axis_rode.height / 2, 0.)
x_axis_shift_control_node_2.name = 'sx2'
x_axis_shift_control_node_2.categoryBitMask = 2
x_axis_node.addChildNode(x_axis_shift_control_node_2)
axis_handle.addChildNode(x_axis_node)
y_axis_node = scn.Node.nodeWithGeometry(vertical_axis_rode)
y_axis_node.rotation = (1, 0, 0, -math.pi)
y_axis_node.position = (0, -3, 0)
y_axis_rotate_control_node_1 = scn.Node.nodeWithGeometry(
rotate_control_geometry)
y_axis_rotate_control_node_1.position = (0.,
-vertical_axis_rode.height / 2,
0.)
y_axis_rotate_control_node_1.name = 'ry1'
y_axis_rotate_control_node_1.categoryBitMask = 2
y_axis_node.addChildNode(y_axis_rotate_control_node_1)
y_axis_rotate_control_node_2 = scn.Node.nodeWithGeometry(
rotate_control_geometry)
y_axis_rotate_control_node_2.position = (0., vertical_axis_rode.height / 2,
0.)
y_axis_rotate_control_node_2.name = 'ry2'
y_axis_rotate_control_node_2.categoryBitMask = 2
y_axis_node.addChildNode(y_axis_rotate_control_node_2)
axis_handle.addChildNode(y_axis_node)
z_axis_node = scn.Node.nodeWithGeometry(axis_rode)
z_axis_node.rotation = (1, 0, 0, -math.pi / 2)
z_axis_node.position = (0, 0, -1.5)
z_axis_rotate_control_node_1 = scn.Node.nodeWithGeometry(
rotate_control_geometry)
z_axis_rotate_control_node_1.position = (0., -axis_rode.height / 2 + 1, 0.)
z_axis_rotate_control_node_1.name = 'rz1'
z_axis_rotate_control_node_1.categoryBitMask = 2
z_axis_node.addChildNode(z_axis_rotate_control_node_1)
z_axis_rotate_control_node_2 = scn.Node.nodeWithGeometry(
rotate_control_geometry)
z_axis_rotate_control_node_2.position = (0., axis_rode.height / 2 - 1, 0.)
z_axis_rotate_control_node_2.name = 'rz2'
z_axis_rotate_control_node_2.categoryBitMask = 2
z_axis_node.addChildNode(z_axis_rotate_control_node_2)
z_axis_shift_control_node_1 = scn.Node.nodeWithGeometry(
shift_control_geometry)
z_axis_shift_control_node_1.position = (0., -axis_rode.height / 2, 0.)
z_axis_shift_control_node_1.rotation = (0., 0., 1., math.pi)
z_axis_shift_control_node_1.name = 'sz1'
z_axis_shift_control_node_1.categoryBitMask = 2
z_axis_node.addChildNode(z_axis_shift_control_node_1)
z_axis_shift_control_node_2 = scn.Node.nodeWithGeometry(
shift_control_geometry)
z_axis_shift_control_node_2.position = (0., axis_rode.height / 2, 0.)
z_axis_shift_control_node_2.name = 'sz2'
z_axis_shift_control_node_2.categoryBitMask = 2
z_axis_node.addChildNode(z_axis_shift_control_node_2)
axis_handle.addChildNode(z_axis_node)
return axis_handle
def main(self):
main_view = ui.View()
w, h = ui.get_screen_size()
main_view.frame = (0, 0, w, h)
main_view.name = 'Feisar_Ship demo'
scene_view = scn.View(main_view.frame, superView=main_view)
scene_view.autoresizingMask = scn.ViewAutoresizing.FlexibleHeight | scn.ViewAutoresizing.FlexibleWidth
scene_view.allowsCameraControl = True
scene_view.backgroundColor = 'black'
scene_view.scene = scn.Scene.sceneWithURL(url='Feisar_Ship.scn')
root_node = scene_view.scene.rootNode
feisar_node = root_node.childNodes[0]
feisar_node.light = scn.nil
root_node.light = scn.nil
feisar_geometry = feisar_node.geometry
geometry_sources = feisar_geometry.geometrySources
feisar_material = feisar_geometry.firstMaterial
feisar_material.emission.intensity = 0.05
feisar_material.roughness.contents = (.79, .79, .79)
feisar_material.metalness.contents = (.11, .11, .11)
pulse_action = scn.Action.repeatActionForever(
scn.Action.sequence([
scn.Action.fadeInWithDuration(1.2),
scn.Action.fadeOutWithDuration(0.5)
]))
blue_emitter = scn.Material()
blue_emitter.diffuse.contents = 'black'
blue_emitter.emission.contents = (.0, .35, 1.0)
white_emitter = scn.Material()
white_emitter.diffuse.contents = 'black'
white_emitter.emission.contents = (.86, .98, 1.0)
nose_geometry = scn.Sphere(radius=1.5)
nose_geometry.firstMaterial = blue_emitter
nose_node = scn.Node.nodeWithGeometry(nose_geometry)
nose_node.position = (0., 4.35, 161.)
nose_node.castsShadow = False
nose_node.runAction(pulse_action)
feisar_node.addChildNode(nose_node)
front_grille_p0 = scn.vector3Make((0., 10., 137.6))
front_grille_p1 = scn.vector3Make((0., 20., 153.5))
front_grille_ds1 = scn.vector3Make((-0.25, 0.7, -0.25))
grille_nr = 15
dt = 0.8 / grille_nr
front_grille_node = scn.Node()
feisar_node.addChildNode(front_grille_node)
front_grille_geometry = scn.Cylinder(0.45, 13.7)
front_grille_geometry.firstMaterial = white_emitter
for i in range(grille_nr):
aNode = scn.Node.nodeWithGeometry(front_grille_geometry)
aNode.position = (
0., front_grille_p0.y +
(front_grille_p1.y - front_grille_p0.y) * i / grille_nr,
front_grille_p0.z +
(front_grille_p1.z - front_grille_p0.z) * i / grille_nr)
aNode.scale = (1. + front_grille_ds1.x * i / grille_nr,
1. + front_grille_ds1.y * i / grille_nr,
1. + front_grille_ds1.z * i / grille_nr)
aNode.rotation = (0., 0., 1., math.pi / 2)
grille_action = scn.Action.sequence([
scn.Action.waitForDuration(i * dt),
scn.Action.fadeOutWithDuration(0.7 * dt),
scn.Action.waitForDuration(dt),
scn.Action.fadeInWithDuration(0.3 * dt),
scn.Action.waitForDuration((grille_nr - 2 - i) * dt)
])
aNode.runAction(
scn.Action.repeatActionForever(
scn.Action.sequence(
[grille_action,
grille_action.reversedAction()])))
front_grille_node.addChildNode(aNode)
constraint = scn.LookAtConstraint.lookAtConstraintWithTarget(
feisar_node)
constraint.gimbalLockEnabled = True
light_node = scn.Node()
light_node.position = (150, 60, -20)
light = scn.Light()
light.type = scn.LightTypeDirectional
light.castsShadow = True
light.color = (.99, 1.0, .86)
light_node.light = light
light_node.constraints = constraint
root_node.addChildNode(light_node)
main_view.present(hide_title_bar=False)
def main(self):
main_view = ui.View()
w, h = ui.get_screen_size()
main_view.frame = (0,0,w,h)
main_view.name = 'physics experiment demo - 2'
scene_view = scn.View(main_view.frame, superView=main_view)
scene_view.autoresizingMask = scn.ViewAutoresizing.FlexibleHeight | scn.ViewAutoresizing.FlexibleRightMargin
scene_view.allowsCameraControl = True
self.counter_scene = Counter()
counter_view = SceneView()
counter_view.frame = (0., 0., 100., 50.)
counter_view.scene = self.counter_scene
main_view.add_subview(counter_view)
# scene_view.debugOptions = scn.DebugOption.ShowBoundingBoxes | scn.DebugOption.ShowCameras | scn.DebugOption.ShowLightInfluences
# scene_view.debugOptions = scn.DebugOption.ShowPhysicsShapes
scene_view.backgroundColor = 'white'
scene_view.scene = scn.Scene()
physics_world = scene_view.scene.physicsWorld
physics_world.contactDelegate = self
root_node = scene_view.scene.rootNode
box_size = 10
box = scn.Box(box_size, box_size, box_size, 0.0)
box.firstMaterial.diffuse.contents = (.86, .86, .86)
box.firstMaterial.transparency = 0.15
box.firstMaterial.cullMode = scn.CullMode.Front
box_node = scn.Node.nodeWithGeometry(box)
root_node.addChildNode(box_node)
self.particle_number = 25
particle_max_r = box_size/20
particle_colors = ['black', 'blue', 'green', 'pink', 'yellow', 'red', 'cyan', 'gray', 'magenta', 'brown', 'crimson', 'gold', 'indigo', 'olive']
particles_node = scn.Node()
particles_node.physicsField = scn.PhysicsField.electricField()
particles_node.physicsField.strength = 5.0
root_node.addChildNode(particles_node)
for i in range(self.particle_number):
r = random.uniform(0.35*particle_max_r, particle_max_r)
particle = scn.Sphere(r)
particle.firstMaterial.diffuse.contents = random.choice(particle_colors)
particle.firstMaterial.specular.contents = (.86, .94, 1.0, 0.8)
particle_node = scn.Node.nodeWithGeometry(particle)
particle_node.position = (random.uniform(-(box_size/2-particle_max_r)*0.95, (box_size/2-particle_max_r)*0.95), random.uniform(-(box_size/2-particle_max_r)*0.95, (box_size/2-particle_max_r)*0.95), random.uniform(-(box_size/2-particle_max_r)*0.95, (box_size/2-particle_max_r)*0.95))
particle_node.physicsBody = scn.PhysicsBody.dynamicBody()
particle_node.physicsBody.mass = 1.2*r
particle_node.physicsBody.charge = random.uniform(-10*r, +0*r)
particle_node.physicsBody.restitution = 1.0
particle_node.physicsBody.damping = 0.0
particle_node.physicsBody.angularDamping = 0.0
particle_node.physicsBody.continuousCollisionDetectionThreshold = 1*r
particle_node.physicsBody.affectedByGravity = False
particle_node.physicsBody.contactTestBitMask = scn.PhysicsCollisionCategory.Default.value
particle_node.physicsBody.velocity = (random.uniform(-box_size, box_size), random.uniform(-box_size, box_size), random.uniform(-box_size, box_size))
particles_node.addChildNode(particle_node)
box_nodes = scn.Node()
d = box_size/2
for pos in [(d,0,0), (-d,0,0), (0,d,0), (0,-d,0), (0,0,d), (0,0,-d)]:
aNode = scn.Node()
aNode.position = pos
aNode.lookAt((0,0,0))
aNode.physicsBody = scn.PhysicsBody.staticBody()
aNode.physicsBody.physicsShape = scn.PhysicsShape.shapeWithGeometry(scn.Plane(box_size, box_size))
box_nodes.addChildNode(aNode)
root_node.addChildNode(box_nodes)
constraint = scn.LookAtConstraint.lookAtConstraintWithTarget(root_node)
constraint.gimbalLockEnabled = True
camera_node = scn.Node()
camera_node.camera = scn.Camera()
camera_node.position = (-2.5*box_size, 1.5*box_size, 2*box_size)
camera_node.constraints = constraint
root_node.addChildNode(camera_node)
light_node = scn.Node()
light_node.position = (box_size, box_size, box_size)
light = scn.Light()
light.type = scn.LightTypeDirectional
light.castsShadow = True
light.shadowSampleCount = 32
light.color = (.95, 1.0, .98)
light_node.light = light
light_node.constraints = constraint
root_node.addChildNode(light_node)
main_view.present(style='fullscreen', hide_title_bar=False)
def main(self):
main_view = ui.View()
w, h = ui.get_screen_size()
main_view.frame = (0, 0, w, h)
main_view.name = 'physics experiment demo - 1'
scene_view = scn.View(main_view.frame, superView=main_view)
scene_view.autoresizingMask = scn.ViewAutoresizing.FlexibleHeight | scn.ViewAutoresizing.FlexibleRightMargin
scene_view.allowsCameraControl = True
scene_view.backgroundColor = 'white'
scene_view.scene = scn.Scene()
physics_world = scene_view.scene.physicsWorld
root_node = scene_view.scene.rootNode
floor_geometry = scn.Floor()
floor_geometry.reflectivity = 0.1
floor_node = scn.Node.nodeWithGeometry(floor_geometry)
root_node.addChildNode(floor_node)
ball_radius = 0.2
ball_geometry = scn.Sphere(radius=ball_radius)
ball_geometry.firstMaterial.diffuse.contents = (.48, .48, .48)
ball_geometry.firstMaterial.specular.contents = (.88, .88, .88)
ball_node = scn.Node.nodeWithGeometry(ball_geometry)
rope_seg_nr = 45
rope_length = 5.0
rope_radius = 0.025
rope_seg_length = rope_length / rope_seg_nr
rope_element_geometry = scn.Capsule(rope_radius, rope_seg_length)
rope_element_geometry.firstMaterial.diffuse.content = (.77, .67, .09)
rope_nodes = []
for i in range(rope_seg_nr):
rope_nodes.append(scn.Node.nodeWithGeometry(rope_element_geometry))
if i > 0:
rope_nodes[-1].position = (0., -rope_seg_length, 0.)
rope_nodes[-2].addChildNode(rope_nodes[-1])
aConstraint = scn.DistanceConstraint.distanceConstraintWithTarget(
rope_nodes[-2])
aConstraint.maximumDistance = rope_seg_length
aConstraint.minimumDistance = rope_seg_length
rope_nodes[-1].constraints = aConstraint
else:
rope_nodes[0].position = (0, rope_length + 1.0 -
rope_seg_length / 2, 0)
aConstraint = scn.DistanceConstraint.distanceConstraintWithTarget(
root_node)
aConstraint.maximumDistance = rope_length + 1.0 - rope_seg_length / 2
aConstraint.minimumDistance = rope_length + 1.0 - rope_seg_length / 2
rope_nodes[0].constraints = aConstraint
ball_node.position = (0,
-rope_seg_length / 2 - rope_radius - ball_radius,
0)
aConstraint = scn.DistanceConstraint.distanceConstraintWithTarget(
rope_nodes[-1])
aConstraint.maximumDistance = rope_seg_length / 2 + rope_radius + ball_radius
aConstraint.minimumDistance = rope_seg_length / 2 + rope_radius + ball_radius
ball_node.constraints = aConstraint
rope_nodes[-1].addChildNode(ball_node)
root_node.addChildNode(rope_nodes[0])
ball_physicsBody = scn.PhysicsBody.dynamicBody()
ball_physicsBody.physicsShape = scn.PhysicsShape.shapeWithGeometry(
ball_geometry)
ball_physicsBody.mass = 5.0
ball_physicsBody.damping = 0.005
ball_physicsBody.angularDamping = 0.00
ball_node.physicsBody = ball_physicsBody
rope_element_physicsShape = scn.PhysicsShape.shapeWithGeometry(
rope_element_geometry)
for i in range(rope_seg_nr):
rope_nodes[i].physicsBody = scn.PhysicsBody.dynamicBody()
rope_nodes[i].physicsBody.physicsShape = rope_element_physicsShape
rope_nodes[i].physicsBody.mass = 1.1
rope_nodes[i].physicsBody.damping = 0.00
rope_nodes[i].physicsBody.angularDamping = 0.00
if i > 0:
physics_world.addBehavior(
scn.PhysicsBallSocketJoint.joint(
rope_nodes[i - 1].physicsBody,
(0, -rope_seg_length / 2, 0),
rope_nodes[i].physicsBody,
(0, rope_seg_length / 2, 0)))
physics_world.addBehavior(
scn.PhysicsBallSocketJoint.joint(rope_nodes[0].physicsBody,
(0, rope_seg_length / 2, 0)))
physics_world.addBehavior(
scn.PhysicsBallSocketJoint.joint(rope_nodes[-1].physicsBody,
(0, -rope_seg_length / 2, 0),
ball_node.physicsBody,
(0, ball_radius, 0)))
ball_node.physicsBody.applyForce((45.0, 0.0, 0.0), True)
camera_node = scn.Node()
camera_node.camera = scn.Camera()
camera_node.position = (0, rope_length + 1.0, rope_length)
camera_node.lookAt((0, rope_length / 2 + 1.0, 0))
root_node.addChildNode(camera_node)
light_node = scn.Node()
light_node.position = (rope_length, rope_length, rope_length)
light = scn.Light()
light.type = scn.LightTypeDirectional
light.castsShadow = True
light.shadowSampleCount = 32
light.color = (.99, 1.0, .86)
light_node.light = light
light_node.lookAt((0, rope_length / 2 + 1.0, 0))
root_node.addChildNode(light_node)
main_view.present(style='fullscreen', hide_title_bar=False)
def setupSceneElements(self, scene):
#add walls
wall = scn.Node(geometry=scn.Box(width=400, height=100, length=4, chamferRadius=0))
wall.geometry.firstMaterial.diffuse.contents = "resources/wall.jpg"
scale = list(scn.Matrix4Identity)
scale[0], scale[5], scale[13], scale[10] = 24., 2., 1., 1.
wall.geometry.firstMaterial.diffuse.contentsTransform = scale
wall.geometry.firstMaterial.diffuse.wrapS = scn.WrapMode.Repeat
wall.geometry.firstMaterial.diffuse.wrapT = scn.WrapMode.Mirror
wall.geometry.firstMaterial.doubleSided = False
wall.castsShadow = False
wall.geometry.firstMaterial.locksAmbientWithDiffuse = False
wall.position = scn.Vector3(0, 50, -92)
wall.physicsBody = scn.PhysicsBody.staticBody()
scene.rootNode.addChildNode(wall)
wall = wall.clone()
wall.position = scn.Vector3(-202, 50, 0)
wall.rotation = scn.Vector4(0, 1, 0, M_PI_2)
scene.rootNode.addChildNode(wall)
wall = wall.clone()
wall.position = scn.Vector3(202, 50, 0)
wall.rotation = scn.Vector4(0, 1, 0, -M_PI_2)
scene.rootNode.addChildNode(wall)
backWall = scn.Node(geometry=scn.Plane(width=400, height=100))
backWall.geometry.firstMaterial = wall.geometry.firstMaterial
backWall.position = scn.Vector3(0, 50, 200)
backWall.rotation = scn.Vector4(0, 1, 0, M_PI)
backWall.castsShadow = False
backWall.physicsBody = scn.PhysicsBody.staticBody()
scene.rootNode.addChildNode(backWall)
#add ceil
ceilNode = scn.Node(geometry=scn.Plane(width=400, height=400))
ceilNode.position = scn.Vector3(0, 100, 0)
ceilNode.rotation = scn.Vector4(1, 0, 0, M_PI_2)
ceilNode.geometry.firstMaterial.doubleSided = False
ceilNode.castsShadow = False
ceilNode.geometry.firstMaterial.locksAmbientWithDiffuse = False
scene.rootNode.addChildNode(ceilNode)
#add a train
self.addTrainToScene(scene, pos=scn.Vector3(-5, 20, -40))
#add wooden blocks
self.addWoodenBlockToScene(scene, imageName="resources/WoodCubeA.jpg", position=scn.Vector3(-10, 15, 10))
self.addWoodenBlockToScene(scene, imageName="resources/WoodCubeB.jpg", position=scn.Vector3(-9, 10, 10))
self.addWoodenBlockToScene(scene, imageName="resources/WoodCubeC.jpg", position=scn.Vector3(20, 15, -11))
self.addWoodenBlockToScene(scene, imageName="resources/WoodCubeA.jpg", position=scn.Vector3(25, 5, -20))
#add more block
for _ in range(4):
self.addWoodenBlockToScene(scene, imageName="resources/WoodCubeA.jpg", position=scn.Vector3(random.randint(-30, 30), 20, random.randint(-20, 20)))
self.addWoodenBlockToScene(scene, imageName="resources/WoodCubeB.jpg", position=scn.Vector3(random.randint(-30, 30), 20, random.randint(-20, 20)))
self.addWoodenBlockToScene(scene, imageName="resources/WoodCubeC.jpg", position=scn.Vector3(random.randint(-30, 30), 20, random.randint(-20, 20)))
#add cartoon book
block = scn.Node()
block.position = scn.Vector3(20, 10, -16)
block.rotation = scn.Vector4(0, 1, 0, -M_PI_4)
block.geometry = scn.Box(width=22, height=2., length=34, chamferRadius=0)
frontMat = scn.Material()
frontMat.locksAmbientWithDiffuse = True
frontMat.diffuse.contents = "resources/book_front.jpg"
frontMat.diffuse.mipFilter = scn.FilterMode.Linear
backMat = scn.Material()
backMat.locksAmbientWithDiffuse = True
backMat.diffuse.contents = "resources/book_back.jpg"
backMat.diffuse.mipFilter = scn.FilterMode.Linear
edgeMat = scn.Material()
edgeMat.locksAmbientWithDiffuse = True
edgeMat.diffuse.contents = "resources/book_side_title.jpg"
edgeMat.diffuse.mipFilter = scn.FilterMode.Linear
edgeMatSide = scn.Material()
edgeMatSide.locksAmbientWithDiffuse = True
edgeMatSide.diffuse.contents = "resources/book_side.jpg"
edgeMatSide.diffuse.mipFilter = scn.FilterMode.Linear
block.geometry.materials = [edgeMatSide, edgeMatSide, edgeMatSide, edgeMat, frontMat, backMat]
block.physicsBody = scn.PhysicsBody.dynamicBody()
scene.rootNode.addChildNode(block)
#add carpet
path = ui.Path.rounded_rect(-50, -30, 100, 50, 2.5)
rug_geometry = scn.Shape.shapeWithPath(path, extrusionDepth=0.05)
rug = scn.Node.nodeWithGeometry(rug_geometry)
rug.geometry.firstMaterial.locksAmbientWithDiffuse = True
rug.geometry.firstMaterial.diffuse.contents = "resources/carpet.jpg"
rug.position = scn.Vector3(0, 0.01, 0)
rug.rotation = scn.Vector4(1, 0, 0, M_PI_2)
scene.rootNode.addChildNode(rug)
#add ball
ball = scn.Node()
ball.position = scn.Vector3(-5, 5, -18)
ball.geometry = scn.Sphere(radius=5)
ball.geometry.firstMaterial.locksAmbientWithDiffuse = True
ball.geometry.firstMaterial.diffuse.contents = "resources/ball.jpg"
scale = list(scn.Matrix4Identity)
scale[0], scale[5], scale[10] = 2., 1., 1.
ball.geometry.firstMaterial.diffuse.contentsTransform = scale
ball.geometry.firstMaterial.diffuse.wrapS = scn.WrapMode.Mirror
ball.physicsBody = scn.PhysicsBody.dynamicBody()
ball.physicsBody.restitution = 0.9
scene.rootNode.addChildNode(ball)
def main(self):
main_view = ui.View()
w, h = ui.get_screen_size()
main_view.frame = (0, 0, w, h)
main_view.name = 'avoid occluder demo'
scene_view = scn.View(main_view.frame, superView=main_view)
scene_view.autoresizingMask = scn.ViewAutoresizing.FlexibleHeight | scn.ViewAutoresizing.FlexibleWidth
scene_view.allowsCameraControl = True
scene_view.delegate = self
scene_view.backgroundColor = 'white'
scene_view.rendersContinuously = True
scene_view.scene = scn.Scene()
root_node = scene_view.scene.rootNode
floor_geometry = scn.Floor()
floor_node = scn.Node.nodeWithGeometry(floor_geometry)
root_node.addChildNode(floor_node)
ball_radius = 0.2
ball_geometry = scn.Sphere(radius=ball_radius)
ball_geometry.firstMaterial.diffuse.contents = (.48, .48, .48)
ball_geometry.firstMaterial.specular.contents = (.88, .88, .88)
self.ball_node_1 = scn.Node.nodeWithGeometry(ball_geometry)
self.ball_node_2 = scn.Node.nodeWithGeometry(ball_geometry)
root_node.addChildNode(self.ball_node_1)
root_node.addChildNode(self.ball_node_2)
occluder_geometry = scn.Box(0.3, 2., 15., 0.2)
occluder_geometry.firstMaterial.diffuse.contents = (.91, .91, .91)
occluder_node = scn.Node.nodeWithGeometry(occluder_geometry)
occluder_node.position = (0., 0.8, 0.)
root_node.addChildNode(occluder_node)
self.orbit_r = 10
self.omega_speed_1 = math.pi / 1500
self.omega_speed_2 = 1.5 * self.omega_speed_1
self.ball_node_1.position = (self.orbit_r, 0.5, 0.)
self.ball_node_2.position = (0., 0.5, self.orbit_r)
constraint = scn.AvoidOccluderConstraint.avoidOccluderConstraintWithTarget(
self.ball_node_1)
self.ball_node_2.constraints = [constraint]
camera_node = scn.Node()
camera_node.camera = scn.Camera()
camera_node.position = (0.5 * self.orbit_r, 0.5 * self.orbit_r,
1.5 * self.orbit_r)
camera_node.lookAt(root_node.position)
root_node.addChildNode(camera_node)
light_node = scn.Node()
light_node.position = (self.orbit_r, self.orbit_r, self.orbit_r)
light = scn.Light()
light.type = scn.LightTypeDirectional
light.castsShadow = True
light.shadowSampleCount = 32
light.color = (.99, 1.0, .86)
light_node.light = light
light_node.lookAt(root_node.position)
root_node.addChildNode(light_node)
main_view.present(style='fullscreen', hide_title_bar=False)