def __init__(self):
# the camera
self.camera = None
# the renderer
self.renderer = None
self.batch = None
self.font = None
# our box2D world
self.world = None
# ground body to connect the mouse joint to
self.groundBody = None
# our mouse joint
self.mouseJoint = None
# a hit body
self.hitBody = None
self.testPoint = Vector3()
self.callback = Box2DTest.QueryCallbackNew(self)
# temp vector
self.tmp = Vector2()
# another temporary vector
self.target = Vector2()
def create(self):
'''
setup the camera. In Box2D we operate on a
meter scale, pixels won't do it. So we use
an orthographic camera with a viewport of
48 meters in width and 32 meters in height.
we also position the camera so that it
looks at (0, 16) (that's where the middle of the
screen will be located).
'''
self.camera = OrthographicCamera(48, 32)
self.camera.position.set(0, 15, 0)
# create the debug renderer
self.renderer = Box2DDebugRenderer()
# create the world
self.world = World(Vector2(0, -10), True)
# we also need an invisible zero size ground body
# to which we can connect the mouse joint
bodyDef = BodyDef()
self.groundBody = self.world.createBody(bodyDef)
# call abstract method to populate the world
self.createWorld(self.world)
self.batch = SpriteBatch()
self.font = BitmapFont(Gdx.files.internal('../data/arial-15.fnt'), False)
Gdx.input.setInputProcessor(self)
def createWorld(self, world):
bd = BodyDef()
ground = world.createBody(bd)
shape = EdgeShape()
shape.set(Vector2(-40, 0), Vector2(40, 0))
ground.createFixture(shape, 0.0)
shape.dispose()
shape = PolygonShape()
shape.setAsBox(0.6, 0.125)
fd = FixtureDef()
fd.shape = shape
fd.density = 20.0
fd.friction = 0.2
jd = RevoluteJointDef()
jd.collideConnected = False
y = 25.0
prevBody = ground
for i in range(30):
bd = BodyDef()
bd.type = BodyType.DynamicBody
bd.position.set(0.5 + i, y)
body = world.createBody(bd)
body.createFixture(fd)
anchor = Vector2(i, y)
jd.initialize(prevBody, body, anchor)
world.createJoint(jd)
prevBody = body
shape.dispose()
def createWorld(self, world):
bd = BodyDef()
ground = world.createBody(bd)
shape = EdgeShape()
shape.set(Vector2(-40, 0), Vector2(40, 0))
ground.createFixture(shape, 0)
shape.dispose()
shape = PolygonShape()
shape.setAsBox(0.5, 0.125)
fd = FixtureDef()
fd.shape = shape
fd.density = 20.0
jd = WeldJointDef()
prevBody = ground
for i in range(self.e_count):
bd = BodyDef()
bd.type = BodyType.DynamicBody
bd.position.set(-14.5 + 1.0 * i, 5.0)
body = world.createBody(bd)
body.createFixture(fd)
anchor = Vector2(-15.0 + 1 * i, 5.0)
jd.initialize(prevBody, body, anchor)
world.createJoint(jd)
prevBody = body
shape.dispose()
shape = PolygonShape()
shape.setAsBox(0.5, 0.125)
fd = FixtureDef()
fd.shape = shape
fd.density = 20.0
jd = WeldJointDef()
prevBody = ground
for i in range(self.e_count):
bd = BodyDef()
bd.type = BodyType.DynamicBody
bd.position.set(-14.5 + 1.0 * i, 15.0)
bd.gravityScale = 10.0
body = world.createBody(bd)
body.createFixture(fd)
anchor = Vector2(-15.0 + 1.0 * i, 15.0)
jd.initialize(prevBody, body, anchor)
world.createJoint(jd)
prevBody = body
shape.dispose()
shape = PolygonShape()
shape.setAsBox(0.5, 0.125)
fd = FixtureDef()
fd.shape = shape
fd.density = 20.0
jd = WeldJointDef()
prevBody = ground
for i in range(self.e_count):
bd = BodyDef()
bd.type = BodyType.DynamicBody
bd.position.set(-4.5 + 1.0 * i, 5.0)
body = world.createBody(bd)
body.createFixture(fd)
if i > 0:
anchor = Vector2(-5.0 + 1.0 * i, 5.0)
jd.initialize(prevBody, body, anchor)
world.createJoint(jd)
prevBody = body
shape.dispose()
shape = PolygonShape()
shape.setAsBox(0.5, 0.125)
fd = FixtureDef()
fd.shape = shape
fd.density = 20.0
jd = WeldJointDef()
prevBody = ground
for i in range(self.e_count):
bd = BodyDef()
bd.type = BodyType.DynamicBody
bd.position.set(5.5 + 1.0 * i, 10.0)
bd.gravityScale = 10.0
body = world.createBody(bd)
body.createFixture(fd)
if i > 0:
anchor = Vector2(5.0 + 1.0 * i, 10.0)
jd.initialize(prevBody, body, anchor)
world.createJoint(jd)
prevBody = body
shape.dispose()
for i in range(2):
vertices = []
vertices.append(Vector2(-0.5, 0))
vertices.append(Vector2(0.5, 0))
vertices.append(Vector2(0, 1.5))
shape = PolygonShape()
shape.set(vertices)
fd = FixtureDef()
fd.shape = shape
fd.density = 1.0
bd = BodyDef()
bd.type = BodyType.DynamicBody
bd.position.set(-8.0 + 8.0 * i, 12.0)
body = world.createBody(bd)
body.createFixture(fd)
shape.dispose()
for i in range(2):
shape = CircleShape()
shape.setRadius(0.5)
fd = FixtureDef()
fd.shape = shape
fd.density = 1.0
bd = BodyDef()
bd.type = BodyType.DynamicBody
bd.position.set(-6.0 + 6.0 * i, 10.0)
body = world.createBody(bd)
body.createFixture(fd)
shape.dispose()
def createWorld(self, world):
world.setGravity(Vector2(0, 0))
k_restitution = 0.4
bd = BodyDef()
bd.position.set(0, 20)
ground = world.createBody(bd)
shape = EdgeShape()
sd = FixtureDef()
sd.shape = shape
sd.density = 0
sd.restitution = k_restitution
shape.set(Vector2(-20, -20), Vector2(-20, 20))
ground.createFixture(sd)
shape.set(Vector2(20, -20), Vector2(20, 20))
ground.createFixture(sd)
shape.set(Vector2(-20, 20), Vector2(20, 20))
ground.createFixture(sd)
shape.set(Vector2(-20, -20), Vector2(20, -20))
ground.createFixture(sd)
shape.dispose()
xf1 = Transform(Vector2(), 0.3524 * Math.PI)
xf1.setPosition(xf1.mul(Vector2(1, 0)))
vertices = [None, None, None]
vertices[0] = xf1.mul(Vector2(-1, 0))
vertices[1] = xf1.mul(Vector2(1, 0))
vertices[2] = xf1.mul(Vector2(0, 0.5))
poly1 = PolygonShape()
poly1.set(vertices)
sd1 = FixtureDef()
sd1.shape = poly1
sd1.density = 4.0
xf2 = Transform(Vector2(), -0.3524 * Math.PI)
xf2.setPosition(xf2.mul(Vector2(-1, 0)))
vertices[0] = xf2.mul(Vector2(-1, 0))
vertices[1] = xf2.mul(Vector2(1, 0))
vertices[2] = xf2.mul(Vector2(0, 0.5))
poly2 = PolygonShape()
poly2.set(vertices)
sd2 = FixtureDef()
sd2.shape = poly2
sd2.density = 2.0
bd = BodyDef()
bd.type = BodyType.DynamicBody
bd.angularDamping = 5.0
bd.linearDamping = 0.1
bd.position.set(0, 2)
bd.angle = Math.PI
bd.allowSleep = False
self.m_body = world.createBody(bd)
self.m_body.createFixture(sd1)
self.m_body.createFixture(sd2)
poly1.dispose()
poly2.dispose()
shape = PolygonShape()
shape.setAsBox(0.5, 0.5)
fd = FixtureDef()
fd.shape = shape
fd.density = 1.0
fd.friction = 0.3
for i in range(10):
bd = BodyDef()
bd.type = BodyType.DynamicBody
bd.position.set(0, 5 + 1.54 * i)
body = world.createBody(bd)
body.createFixture(fd)
gravity = 10.0
I = body.getInertia()
mass = body.getMass()
radius = Math.sqrt(2 * I / mass)
jd = FrictionJointDef()
jd.localAnchorA.set(0, 0)
jd.localAnchorB.set(0, 0)
jd.bodyA = ground
jd.bodyB = body
jd.collideConnected = True
jd.maxForce = mass * gravity
jd.maxTorque = mass * radius * gravity
world.createJoint(jd)
shape.dispose()
def __init__(self):
super(ApplyForce, self).__init__()
self.m_body = None
self.tmp = Vector2()
def createWorld(self, world):
bd = BodyDef()
ground = world.createBody(bd)
shape = EdgeShape()
shape.set(Vector2(-20, 0), Vector2(20, 0))
ground.createFixture(shape, 0)
shape.dispose()
bd = BodyDef()
ground = world.createBody(bd)
shape = EdgeShape()
shape.setRadius(0)
shape.set(Vector2(-8, 1), Vector2(-6, 1))
ground.createFixture(shape, 0)
shape.set(Vector2(-6, 1), Vector2(-4, 1))
ground.createFixture(shape, 0)
shape.set(Vector2(-4, 1), Vector2(-2, 1))
ground.createFixture(shape, 0)
shape.dispose()
bd = BodyDef()
ground = world.createBody(bd)
shape = PolygonShape()
shape.setAsBox(1, 1, Vector2(4, 3), 0)
ground.createFixture(shape, 0)
shape.setAsBox(1, 1, Vector2(6, 3), 0)
ground.createFixture(shape, 0)
shape.setAsBox(1, 1, Vector2(8, 3), 0)
ground.createFixture(shape, 0)
shape.dispose()
bd = BodyDef()
ground = world.createBody(bd)
shape = EdgeShape()
d = 2 * 2 * 0.005
shape.setRadius(0)
shape.set(Vector2(-1 + d, 3), Vector2(1 - d, 3))
ground.createFixture(shape, 0)
shape.set(Vector2(1, 3 + d), Vector2(1, 5 - d))
ground.createFixture(shape, 0)
shape.set(Vector2(1 - d, 5), Vector2(-1 + d, 5))
ground.createFixture(shape, 0)
shape.set(Vector2(-1, 5 - d), Vector2(-1, 3 + d))
ground.createFixture(shape, 0)
shape.dispose()
bd = BodyDef()
bd.position.set(-3, 5)
bd.type = BodyType.DynamicBody
bd.fixedRotation = True
bd.allowSleep = False
body = world.createBody(bd)
shape = PolygonShape()
shape.setAsBox(0.5, 0.5)
fd = FixtureDef()
fd.shape = shape
fd.density = 20.0
body.createFixture(fd)
shape.dispose()
bd = BodyDef()
bd.position.set(-5, 5)
bd.type = BodyType.DynamicBody
bd.fixedRotation = True
bd.allowSleep = False
body = world.createBody(bd)
angle = 0.0
delta = Math.PI / 3
vertices = []
for i in range(6):
vertices.append(
Vector2(0.5 * Math.cos(angle), 0.5 * Math.sin(angle)))
angle += delta
shape = PolygonShape()
shape.set(vertices)
fd = FixtureDef()
fd.shape = shape
fd.density = 20.0
body.createFixture(fd)
shape.dispose()
bd = BodyDef()
bd.position.set(3, 5)
bd.type = BodyType.DynamicBody
bd.fixedRotation = True
bd.allowSleep = False
body = world.createBody(bd)
shape = CircleShape()
shape.setRadius(0.5)
fd = FixtureDef()
fd.shape = shape
fd.density = 20.0
body.createFixture(fd)
shape.dispose()
def createWorld(self, world):
shape = EdgeShape()
shape.set(Vector2(-40.0, 0), Vector2(40, 0))
fd = FixtureDef()
fd.shape = shape
fd.friction = 0.3
bd = BodyDef()
ground = world.createBody(bd)
ground.createFixture(fd)
shape.dispose()
vertices = []
vertices.append(Vector2(-1, 0))
vertices.append(Vector2(1, 0))
vertices.append(Vector2(0, 2))
polygon = PolygonShape()
polygon.set(vertices)
triangleShapeDef = FixtureDef()
triangleShapeDef.shape = polygon
triangleShapeDef.density = 1.0
triangleShapeDef.filter.groupIndex = self.k_smallGroup
triangleShapeDef.filter.categoryBits = self.k_triangleCategory
triangleShapeDef.filter.maskBits = self.k_triangleMask
triangleBodyDef = BodyDef()
triangleBodyDef.type = BodyType.DynamicBody
triangleBodyDef.position.set(-5, 2)
body1 = world.createBody(triangleBodyDef)
body1.createFixture(triangleShapeDef)
vertices[0].scl(2)
vertices[1].scl(2)
vertices[2].scl(2)
polygon.set(vertices)
triangleShapeDef.filter.groupIndex = self.k_largeGroup
triangleBodyDef.position.set(-5, 6)
triangleBodyDef.fixedRotation = True
body2 = world.createBody(triangleBodyDef)
body2.createFixture(triangleShapeDef)
bd = BodyDef()
bd.type = BodyType.DynamicBody
bd.position.set(-5, 10)
body = world.createBody(bd)
p = PolygonShape()
p.setAsBox(0.5, 1.0)
body.createFixture(p, 1)
jd = PrismaticJointDef()
jd.bodyA = body2
jd.bodyB = body
jd.enableLimit = True
jd.localAnchorA.set(0, 4)
jd.localAnchorB.set(0, 0)
jd.localAxisA.set(0, 1)
jd.lowerTranslation = -1
jd.upperTranslation = 1
world.createJoint(jd)
p.dispose()
polygon.setAsBox(1, 0.5)
boxShapeDef = FixtureDef()
boxShapeDef.shape = polygon
boxShapeDef.density = 1
boxShapeDef.restitution = 0.1
boxShapeDef.filter.groupIndex = self.k_smallGroup
boxShapeDef.filter.categoryBits = self.k_boxCategory
boxShapeDef.filter.maskBits = self.k_boxMask
boxBodyDef = BodyDef()
boxBodyDef.type = BodyType.DynamicBody
boxBodyDef.position.set(0, 2)
body3 = world.createBody(boxBodyDef)
body3.createFixture(boxShapeDef)
polygon.setAsBox(2, 1)
boxShapeDef.filter.groupIndex = self.k_largeGroup
boxBodyDef.position.set(0, 6)
body4 = world.createBody(boxBodyDef)
body4.createFixture(boxShapeDef)
circle = CircleShape()
circle.setRadius(1)
circleShapeDef = FixtureDef()
circleShapeDef.shape = circle
circleShapeDef.density = 1.0
circleShapeDef.filter.groupIndex = self.k_smallGroup
circleShapeDef.filter.categoryBits = self.k_circleCategory
circleShapeDef.filter.maskBits = self.k_circleMask
circleBodyDef = BodyDef()
circleBodyDef.type = BodyType.DynamicBody
circleBodyDef.position.set(5, 2)
body5 = world.createBody(circleBodyDef)
body5.createFixture(circleShapeDef)
circle.setRadius(2)
circleShapeDef.filter.groupIndex = self.k_largeGroup
circleBodyDef.position.set(5, 6)
body6 = world.createBody(circleBodyDef)
body6.createFixture(circleShapeDef)
def createWorld(self, world):
world.setContactListener(self)
bd = BodyDef()
ground = world.createBody(bd)
shape = EdgeShape()
shape.set(Vector2(-20, 0), Vector2(20, 0))
ground.createFixture(shape, 0)
shape.dispose()
bd = BodyDef()
ground = world.createBody(bd)
shape = EdgeShape()
shape.setRadius(0)
shape.set(Vector2(-8, 1), Vector2(-6, 1))
ground.createFixture(shape, 0)
shape.set(Vector2(-6, 1), Vector2(-4, 1))
ground.createFixture(shape, 0)
shape.set(Vector2(-4, 1), Vector2(-2, 1))
ground.createFixture(shape, 0)
shape.dispose()
bd = BodyDef()
ground = world.createBody(bd)
shape = PolygonShape()
shape.setAsBox(1, 1, Vector2(4, 3), 0)
ground.createFixture(shape, 0)
shape.setAsBox(1, 1, Vector2(6, 3), 0)
ground.createFixture(shape, 0)
shape.setAsBox(1, 1, Vector2(8, 3), 0)
ground.createFixture(shape, 0)
shape.dispose()
def createWorld(self, world):
ground = None
bd = BodyDef()
ground = world.createBody(bd)
shape = EdgeShape()
shape.set(Vector2(-20, 0), Vector2(20, 0))
fd = FixtureDef()
fd.shape = shape
ground.createFixture(fd)
shape.dispose()
bd = BodyDef()
bd.type = BodyType.DynamicBody
bd.position.set(0, 3.0)
self.m_attachment = world.createBody(bd)
shape = PolygonShape()
shape.setAsBox(0.5, 2.0)
self.m_attachment.createFixture(shape, 2.0)
shape.dispose()
bd = BodyDef()
bd.type = BodyType.DynamicBody
bd.position.set(-4.0, 5.0)
self.m_platform = world.createBody(bd)
shape = PolygonShape()
shape.setAsBox(0.5, 4.0, Vector2(4.0, 0), 0.5 * Math.PI)
fd = FixtureDef()
fd.shape = shape
fd.friction = 0.6
fd.density = 2.0
self.m_platform.createFixture(fd)
shape.dispose()
rjd = RevoluteJointDef()
rjd.initialize(self.m_attachment, self.m_platform, Vector2(0, 5.0))
rjd.maxMotorTorque = 50.0
rjd.enableMotor = True
world.createJoint(rjd)
pjd = PrismaticJointDef()
pjd.initialize(ground, self.m_platform, Vector2(0, 5.0), Vector2(1, 0))
pjd.maxMotorForce = 1000.0
pjd.enableMotor = True
pjd.lowerTranslation = -10.0
pjd.upperTranslation = 10.0
pjd.enableLimit = True
world.createJoint(pjd)
self.m_speed = 3.0
bd = BodyDef()
bd.type = BodyType.DynamicBody
bd.position.set(0, 8.0)
body = world.createBody(bd)
shape = PolygonShape()
shape.setAsBox(0.75, 0.75)
fd = FixtureDef()
fd.shape = shape
fd.friction = 0.6
fd.density = 2.0
body.createFixture(fd)
shape.dispose()
def __init__(self):
self.m_attachment = None
self.m_platform = None
self.m_speed = None
self.tmp = Vector2()