def __init__(self,
screen_size,
gravity=(0.0, -9.0),
ppm=100.0,
renderer='pygame'):
""" Init the world with boundaries and gravity, and init colors.
Parameters:
screen_size .. (w, h) -- screen size in pixels [int]
gravity ...... (x, y) in m/s^2 [float] default: (0.0, -9.0)
ppm .......... pixels per meter [float] default: 100.0
renderer ..... which drawing method to use (str) default:
'pygame'
Return: class Elements()
"""
self.set_screenSize(screen_size)
self.set_drawingMethod(renderer)
# Create Subclasses
self.add = add_objects.Add(self)
self.callbacks = callbacks.CallbackHandler(self)
self.camera = camera.Camera(self)
# Gravity + Bodies will sleep on outside
self.gravity = gravity
self.doSleep = True
self.PIN_MOTOR_RADIUS = 2
# Create the World
self.world = box2d.b2World(self.gravity, self.doSleep)
bodyDef = box2d.b2BodyDef()
self.world.groundBody = self.world.CreateBody(bodyDef)
# Init Colors
self.init_colors()
# Set Pixels per Meter
self.ppm = ppm
def __init__(self, screen_size, gravity=(0.0, -9.0), ppm=100.0,
renderer='pygame'):
""" Init the world with boundaries and gravity, and init colors.
Parameters:
screen_size .. (w, h) -- screen size in pixels [int]
gravity ...... (x, y) in m/s^2 [float] default: (0.0, -9.0)
ppm .......... pixels per meter [float] default: 100.0
renderer ..... which drawing method to use (str) default:
'pygame'
Return: class Elements()
"""
self.set_screenSize(screen_size)
self.set_drawingMethod(renderer)
# Create Subclasses
self.add = add_objects.Add(self)
self.callbacks = callbacks.CallbackHandler(self)
self.camera = camera.Camera(self)
# Gravity + Bodies will sleep on outside
self.gravity = gravity
self.doSleep = True
self.PIN_MOTOR_RADIUS = 2
# Create the World
self.world = box2d.b2World(self.gravity, self.doSleep)
bodyDef = box2d.b2BodyDef()
self.world.groundBody = self.world.CreateBody(bodyDef)
# Init Colors
self.init_colors()
# Set Pixels per Meter
self.ppm = ppm
def json_load(self, path, serialized=False):
import json
self.world.groundBody.userData = {"saveid": 0}
f = open(path, 'r')
worldmodel = json.loads(f.read())
f.close()
# clean world
for joint in self.world.joints:
self.world.DestroyJoint(joint)
for body in self.world.bodies:
if body != self.world.groundBody:
self.world.DestroyBody(body)
# load bodies
for body in worldmodel['bodylist']:
bodyDef = box2d.b2BodyDef()
if body['dynamic']:
bodyDef.type = box2d.b2_dynamicBody
bodyDef.position = body['position']
bodyDef.userData = body['userData']
bodyDef.angle = body['angle']
newBody = self.world.CreateBody(bodyDef)
# _logger.debug(newBody)
newBody.angularVelocity = body['angularVelocity']
newBody.linearVelocity = body['linearVelocity']
if 'shapes' in body:
for shape in body['shapes']:
if shape['type'] == 'polygon':
polyDef = box2d.b2FixtureDef()
polyShape = box2d.b2PolygonShape()
polyShape.vertices = shape['vertices']
polyDef.shape = polyShape
polyDef.density = shape['density']
polyDef.restitution = shape['restitution']
polyDef.friction = shape['friction']
newBody.CreateFixture(polyDef)
if shape['type'] == 'circle':
circleDef = box2d.b2FixtureDef()
circleShape = box2d.b2CircleShape()
circleShape.radius = shape['radius']
circleShape.pos = shape['localPosition']
circleDef.shape = circleShape
circleDef.density = shape['density']
circleDef.restitution = shape['restitution']
circleDef.friction = shape['friction']
newBody.CreateFixture(circleDef)
for joint in worldmodel['jointlist']:
if joint['type'] == 'distance':
jointDef = box2d.b2DistanceJointDef()
body1 = self.getBodyWithSaveId(joint['body1'])
anch1 = joint['anchor1']
body2 = self.getBodyWithSaveId(joint['body2'])
anch2 = joint['anchor2']
jointDef.collideConnected = joint['collideConnected']
jointDef.Initialize(body1, body2, anch1, anch2)
jointDef.userData = joint['userData']
self.world.CreateJoint(jointDef)
if joint['type'] == 'revolute':
jointDef = box2d.b2RevoluteJointDef()
body1 = self.getBodyWithSaveId(joint['body1'])
body2 = self.getBodyWithSaveId(joint['body2'])
anchor = joint['anchor']
jointDef.Initialize(body1, body2, anchor)
jointDef.userData = joint['userData']
jointDef.motorEnabled = joint['enableMotor']
jointDef.motorSpeed = joint['motorSpeed']
jointDef.maxMotorTorque = joint['maxMotorTorque']
self.world.CreateJoint(jointDef)
self.additional_vars = {}
addvars = {}
for (k, v) in worldmodel['additional_vars'].items():
addvars[k] = v
if serialized and 'trackinfo' in addvars:
trackinfo = addvars['trackinfo']
for key, info in trackinfo.iteritems():
if not info[3]:
addvars['trackinfo'][key][0] = \
self.getBodyWithSaveId(info[0])
addvars['trackinfo'][key][1] = \
self.getBodyWithSaveId(info[1])
else:
addvars['trackinfo'][key][0] = None
addvars['trackinfo'][key][1] = None
self.additional_vars = addvars
for body in self.world.bodies:
del body.userData['saveid'] # remove temporary data
def json_load(self, path, serialized=False):
import json
self.world.groundBody.userData = {"saveid": 0}
f = open(path, 'r')
worldmodel = json.loads(f.read())
f.close()
# clean world
for joint in self.world.joints:
self.world.DestroyJoint(joint)
for body in self.world.bodies:
if body != self.world.groundBody:
self.world.DestroyBody(body)
# load bodies
for body in worldmodel['bodylist']:
bodyDef = box2d.b2BodyDef()
if body['dynamic']:
bodyDef.type = box2d.b2_dynamicBody
bodyDef.position = body['position']
bodyDef.userData = body['userData']
bodyDef.angle = body['angle']
newBody = self.world.CreateBody(bodyDef)
# _logger.debug(newBody)
newBody.angularVelocity = body['angularVelocity']
newBody.linearVelocity = body['linearVelocity']
if 'shapes' in body:
for shape in body['shapes']:
if shape['type'] == 'polygon':
polyDef = box2d.b2FixtureDef()
polyShape = box2d.b2PolygonShape()
polyShape.vertices = shape['vertices']
polyDef.shape = polyShape
polyDef.density = shape['density']
polyDef.restitution = shape['restitution']
polyDef.friction = shape['friction']
newBody.CreateFixture(polyDef)
if shape['type'] == 'circle':
circleDef = box2d.b2FixtureDef()
circleShape = box2d.b2CircleShape()
circleShape.radius = shape['radius']
circleShape.pos = shape['localPosition']
circleDef.shape = circleShape
circleDef.density = shape['density']
circleDef.restitution = shape['restitution']
circleDef.friction = shape['friction']
newBody.CreateFixture(circleDef)
for joint in worldmodel['jointlist']:
if joint['type'] == 'distance':
jointDef = box2d.b2DistanceJointDef()
body1 = self.getBodyWithSaveId(joint['body1'])
anch1 = joint['anchor1']
body2 = self.getBodyWithSaveId(joint['body2'])
anch2 = joint['anchor2']
jointDef.collideConnected = joint['collideConnected']
jointDef.Initialize(body1, body2, anch1, anch2)
jointDef.userData = joint['userData']
self.world.CreateJoint(jointDef)
if joint['type'] == 'revolute':
jointDef = box2d.b2RevoluteJointDef()
body1 = self.getBodyWithSaveId(joint['body1'])
body2 = self.getBodyWithSaveId(joint['body2'])
anchor = joint['anchor']
jointDef.Initialize(body1, body2, anchor)
jointDef.userData = joint['userData']
jointDef.motorEnabled = joint['enableMotor']
jointDef.motorSpeed = joint['motorSpeed']
jointDef.maxMotorTorque = joint['maxMotorTorque']
self.world.CreateJoint(jointDef)
self.additional_vars = {}
addvars = {}
for (k, v) in worldmodel['additional_vars'].items():
addvars[k] = v
if serialized and 'trackinfo' in addvars:
trackinfo = addvars['trackinfo']
for key, info in trackinfo.iteritems():
if not info[3]:
addvars['trackinfo'][key][0] = \
self.getBodyWithSaveId(info[0])
addvars['trackinfo'][key][1] = \
self.getBodyWithSaveId(info[1])
else:
addvars['trackinfo'][key][0] = None
addvars['trackinfo'][key][1] = None
self.additional_vars = addvars
for body in self.world.bodies:
del body.userData['saveid'] # remove temporary data