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224 lines
9 KiB
Python
224 lines
9 KiB
Python
from collections import OrderedDict
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import os.path
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try:
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import json
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except ImportError:
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try:
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import simplejson as json
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except ImportError:
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raise SystemExit('No JSON module found')
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try:
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from punyverse._model import model_list, load_model
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except ImportError:
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from punyverse.model import model_list, load_model
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from punyverse.glgeom import *
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from punyverse.entity import *
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from punyverse.texture import *
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from punyverse import texture
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from math import pi, sqrt
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G = 6.67384e-11 # Gravitation Constant
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def get_best_texture(info, optional=False):
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cheap = False
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skip = False
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texture = None
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if isinstance(info, list):
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for item in info:
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if isinstance(item, list):
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if len(item) == 4:
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cheap = True
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texture = item
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break
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continue
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try:
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texture = load_texture(item)
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except ValueError:
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pass
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else:
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break
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else:
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try:
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texture = load_texture(info)
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except ValueError:
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if optional:
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skip = True
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else:
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cheap = True
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texture = [1, 1, 1, 1]
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return cheap, skip, texture
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def load_world(file):
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with open(os.path.join(os.path.dirname(__file__), file)) as f:
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root = json.load(f, object_pairs_hook=OrderedDict)
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world = World()
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au = root.get('au', 2000)
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e = lambda x: eval(str(x), {'__builtins__': None}, {'AU': au, 'TEXTURE': texture.max_texture})
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tick = root.get('tick', 4320) # How many second is a tick?
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length = root.get('length', 4320) # Satellite distance is in km, divide by this gets in world units
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world.tick_length = tick
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if 'start' in root:
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info = root['start']
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x = e(info.get('x', 0))
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y = e(info.get('y', 0))
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z = e(info.get('z', 0))
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pitch = e(info.get('pitch', 0))
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yaw = e(info.get('yaw', 0))
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roll = e(info.get('roll', 0))
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world.start = (x, y, z)
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world.direction = (pitch, yaw, roll)
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def body(name, info, parent=None):
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lighting = info.get('lighting', True)
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x = e(info.get('x', 0))
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y = e(info.get('y', 0))
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z = e(info.get('z', 0))
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pitch = e(info.get('pitch', 0))
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yaw = e(info.get('yaw', 0))
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roll = e(info.get('roll', 0))
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rotation = e(info.get('rotation', 86400))
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radius = e(info.get('radius', length)) / length
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background = info.get('background', False)
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orbit_distance = e(info.get('orbit_distance', au))
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division = info.get('division', max(min(int(radius / 8), 60), 10))
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if 'texture' in info:
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cheap, skip, texture = get_best_texture(info['texture'], optional=info.get('optional', False))
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if skip:
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return
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if cheap:
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object_id = compile(colourball, radius, division, division, texture)
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else:
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object_id = compile(sphere, radius, division, division, texture, lighting=lighting)
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elif 'model' in info:
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scale = info.get('scale', 1)
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object_id = model_list(load_model(info['model']), info.get('sx', scale), info.get('sy', scale),
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info.get('sz', scale), (0, 0, 0))
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else:
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print 'Nothing to load for %s.' % name
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return
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params = {'world': world, 'orbit_distance': orbit_distance}
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if parent is None:
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type = Body
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else:
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x, y, z = parent.location
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distance = e(info.get('distance', 100)) # Semi-major axis when actually displayed in virtual space
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sma = e(info.get('sma', distance)) # Semi-major axis used to calculate orbital speed
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if hasattr(parent, 'mass') and parent.mass is not None:
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period = 2 * pi * sqrt((sma * 1000) ** 3 / (G * parent.mass))
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speed = 360 / (period + .0)
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if not rotation: # Rotation = 0 assumes tidal lock
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rotation = period
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else:
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speed = info.get('orbit_speed', 1)
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type = Satellite
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params.update(parent=parent, orbit_speed=speed,
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distance=distance / length, eccentricity=info.get('eccentricity', 0),
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inclination=info.get('inclination', 0), longitude=info.get('longitude', 0),
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argument=info.get('argument', 0))
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if 'mass' in info:
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params['mass'] = info['mass']
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atmosphere_id = 0
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cloudmap_id = 0
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corona_id = 0
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if 'atmosphere' in info:
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atmosphere_data = info['atmosphere']
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atm_size = e(atmosphere_data.get('diffuse_size', None))
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atm_texture = atmosphere_data.get('diffuse_texture', None)
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cloud_texture = atmosphere_data.get('cloud_texture', None)
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corona_texture = atmosphere_data.get('corona_texture', None)
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if cloud_texture is not None:
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cheap, _, cloud_texture = get_best_texture(cloud_texture)
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if not cheap:
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cloudmap_id = compile(sphere, radius + 2, division, division, cloud_texture,
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lighting=False)
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if corona_texture is not None:
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cheap, _, corona = get_best_texture(corona_texture)
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if not cheap:
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corona_size = atmosphere_data.get('corona_size', radius / 2)
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corona_division = atmosphere_data.get('corona_division', 100)
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corona_ratio = atmosphere_data.get('corona_ratio', 0.5)
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corona_id = compile(flare, radius, radius + corona_size, corona_division,
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corona_ratio, corona)
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if atm_texture is not None:
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cheap, _, atm_texture = get_best_texture(atm_texture)
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if not cheap:
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atmosphere_id = compile(disk, radius, radius + atm_size, 30, atm_texture)
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theta = 360 / (rotation + .0) if rotation else 0
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object = type(object_id, (x, y, z), (pitch, yaw, roll), rotation_angle=theta,
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atmosphere=atmosphere_id, cloudmap=cloudmap_id, background=background,
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corona=corona_id, **params)
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world.tracker.append(object)
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if 'ring' in info:
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ring_data = info['ring']
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texture = ring_data.get('texture', None)
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distance = e(ring_data.get('distance', radius * 1.2))
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size = e(ring_data.get('size', radius / 2))
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pitch = e(ring_data.get('pitch', pitch))
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yaw = e(ring_data.get('yaw', yaw))
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roll = e(ring_data.get('roll', roll))
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cheap, _, texture = get_best_texture(texture)
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if not cheap:
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world.tracker.append(
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type(compile(disk, distance, distance + size, 30, texture), (x, y, z),
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(pitch, yaw, roll), **params))
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for satellite, info in info.get('satellites', {}).iteritems():
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print "Loading %s, satellite of %s." % (satellite, name)
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body(satellite, info, object)
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for planet, info in root['bodies'].iteritems():
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print "Loading %s." % planet
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body(planet, info)
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for name, info in root['belts'].iteritems():
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print 'Loading %s.' % name
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x = e(info.get('x', 0))
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y = e(info.get('y', 0))
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z = e(info.get('z', 0))
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radius = e(info.get('radius', 0))
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cross = e(info.get('cross', 0))
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count = int(e(info.get('count', 0)))
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scale = info.get('scale', 1)
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longitude = info.get('longitude', 0)
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inclination = info.get('inclination', 0)
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argument = info.get('argument', 0)
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rotation = info.get('period', 31536000)
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theta = 360 / (rotation + .0) if rotation else 0
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object_id = model_list(load_model(info['model']), info.get('sx', scale), info.get('sy', scale),
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info.get('sz', scale), (0, 0, 0))
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world.tracker.append(Belt(compile(belt, radius, cross, object_id, count),
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(x, y, z), (inclination, longitude, argument),
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rotation_angle=theta, world=world))
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return world
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class World(object):
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def __init__(self):
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self.tracker = []
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self.start = (0, 0, 0)
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self.direction = (0, 0, 0)
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self.x = None
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self.y = None
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self.z = None
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self.tick_length = 1
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self.tick = 0
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