def add_body(self, body='planet', pos=(0, 0), texture_index=None,
vel=(0, 0), density=1, mass=100, fixed=False,
light=0, temperature=0, **kwargs):
# create new widget
newplanet = Planet()
# texture of new body, defaults to planet
texture_list = self.texture_mapping[body]
texture_index = texture_index or randint(0, len(texture_list) - 1)
newplanet_texture = texture_list[texture_index]
newplanet.set_base_image(newplanet_texture)
# inform the engine
newindex = self.tape.engine.create_planet(
pos_x=pos[0],
pos_y=pos[1],
vel_x=vel[0],
vel_y=vel[1],
mass=mass,
density=density
)
# if engine says no, do nothing
if newindex == -1:
return
radius = self.tape.engine.get_planet_radius(newindex)
planet_d = {
'position_x': pos[0],
'position_y': pos[1],
'velocity_x': vel[0],
'velocity_y': vel[1],
'density': density,
'mass': mass,
'radius': radius,
'fixed': fixed,
'widget': newplanet,
'texture_index': texture_index,
'body': body
}
# fix body in keeper if neccessary
if fixed:
self.tape.engine.fix_planet(newindex)
# write dict into planets-dict
self.planets[newindex] = planet_d
# modify planet widget
newplanet.size = (radius * 2, radius * 2)
newplanet.center = pos
self.gamezone.add_widget(newplanet)
self.future_changed = True
