File: character.py

package info (click to toggle)
balazarbrothers 1.0~rc1-2
  • links: PTS
  • area: main
  • in suites: lenny
  • size: 23,528 kB
  • ctags: 451
  • sloc: python: 3,196; xml: 165; makefile: 20
file content (648 lines) | stat: -rw-r--r-- 22,473 bytes parent folder | download | duplicates (3)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
# Balazar Brothers
# Copyright (C) 2006-2007 Jean-Baptiste LAMY
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

import struct
import cerealizer, soya, soya.label3d, soya.tofu as tofu

import balazar_brothers
from balazar_brothers.platform import Platform, MultiCharactersPlatform

ACTION_JUMP          = "J"
ACTION_STOP_JUMPING  = "j"
ACTION_SAY           = "S"
ACTION_CHAT          = "C"

STATE_ABSOLUTE       = "A"
STATE_ON_PLATFORMS   = "P"

MESSAGE_UPDATE_SCORE = "S"
MESSAGE_DISCUSSION   = "D"
MESSAGE_SAY          = "s"
MESSAGE_CHAT         = "C"
MESSAGE_SOUND        = "!"

P1 = soya.Point ()
V1 = soya.Vector()

    
class Character(tofu.SpeedInterpolatedMobile, tofu.AnimatedMobile, Platform):
  COUIC_SOUND      = "couic2.wav"
  ANIMATION_SUFFIX = ""
  
  def __init__(self):
    super(Character, self).__init__()
    Platform.__init__(self)
    
    self.platform_position   = soya.Point(self, 0.0, 2.1, 0.0)
    self.center              = soya.Point(self, 0.0, 1.1, 0.0)

    self.power               = 8.0 # How far the character can jump ?
    self.speed_factor        = 0.1
    self.platform            = None
    self.next_platform       = None
    self.front               = soya.Vector(self, 0.0, 0.0, -1.0)
    self.jump_proportion     = 0.0
    self.jump_start_position = soya.Point()
    self.dying               = 0
    self.current_discussion  = None
    self.want_to_jump        = 0
    self.wait_before_suicide = 20
    
  def get_network_state(self):
    if self.platform or self.next_platform: return STATE_ON_PLATFORMS + tofu.Unique.dumpsuid_or_none(self.platform) + tofu.Unique.dumpsuid_or_none(self.next_platform) + struct.pack("!f", self.jump_proportion)
    return STATE_ABSOLUTE + tofu.Unique.dumpsuid_or_none(self.platform) + tofu.Unique.dumpsuid_or_none(self.next_platform) + super(Character, self).get_network_state()
  
  def read_network_state(self, f):
    code = f.read(1)
    
    self.network_last_state_round = self.network_next_state_round
    self.network_next_state_round = self.level.round

    platform      = tofu.Unique.undumpsuid(f.read(2))
    next_platform = tofu.Unique.undumpsuid(f.read(2))
    
    if not platform is self.platform:
      if self.platform: self.platform.remove_character(self)
      
      if platform:
        self.platform      = platform
        self.next_platform = next_platform
        self.jump_ended()
      else:
        if not self.platform: self.jump_ended()
        self.platform      = platform
        self.next_platform = next_platform
        self.jump()
        
    elif not next_platform is self.next_platform:
      if not self.platform:
        self.platform = self.next_platform
        self.jump_ended()
        self.next_platform = next_platform
        self.jump()
        
      else:
        self.next_platform = next_platform

    if (self.platform is None) and (self.next_platform is None):
      self.die()
      
    if   code == STATE_ON_PLATFORMS:
      self.jump_proportion = struct.unpack("!f", f.read(4))[0]
      
    elif code == STATE_ABSOLUTE:
      super(Character, self).read_network_state(f)
      
    else: raise ValueError("Unkown state code '%s'!" % code)
    
    
  def __getstate__(self):
    front = soya.Vector(self, 0.0, 0.0, -1.0)
    front.convert_to(self.level)
    
    for i in self.characters_on: self.remove(i)
    parent = self.parent
    if parent: parent.remove(self)
    if self.level: self.level.add(self)
    self.look_at(front)
    
    state = super(Character, self).__getstate__()
    state = map(lambda i: (isinstance(i, list) and i[:]) or i, state[0]), state[1].copy()
    
    if parent: parent.add(self)
    self.look_at(front)
    for i in self.characters_on: self.add(i)
    
    del state[1]["current_discussion" ]
    del state[1]["platform"           ]
    del state[1]["next_platform"      ]
    del state[1]["jump_start_position"]
    del state[1]["characters_on"      ]
    del state[1]["last_state"         ]
    del state[1]["next_state"         ]
    del state[1]["speed"              ]
    
    state[1]["platform_platid"] = self.platid
    
    return state
  
  def __setstate__(self, state):
    super(Character, self).__setstate__(state)
    
    self.current_discussion  = None
    self.platform            = None
    self.next_platform       = None
    self.jump_start_position = soya.Point()
    self.characters_on       = []
    self.last_state          = soya.CoordSystState(self)
    self.next_state          = soya.CoordSystState(self)
    self.speed               = soya.CoordSystSpeed(None)
    
  def loaded(self):
    super(Character, self).loaded()
    self.put_on_platform()
    
  def put_on_platform(self):
    if self.platform: # For newly created characters
      if not self in self.platform.characters_on:
        self.platform.add_character(self, change_level = 0)
      return
    
    if self.platform_platid == 0:
      if not tofu.has_side("client"): self.die()
    else:
      self.platform = self.level.platforms[self.platform_platid]
      if self in self.platform.characters_on:
        self.platform.remove_character(self)
        self.platform.add_character(self, change_level = 0)
      else:
        while (self.platform.characters_on) and not (self.platform.suitable_for(self)):
          self.platform = self.platform.characters_on[0]
        if not self in self.platform.characters_on:
          if isinstance(self.platform, balazar_brothers.platform.PortailPlatform):
            self.set_platform(self.platform, change_level = 0)
          else:
            self.platform.add_character(self, change_level = 0)
            
    del self.platform_platid
    
  def set_platform(self, platform, **kargs):
    if self.platform and (self in self.platform.characters_on): self.platform.remove_character(self)
    
    self.platform = platform
    
    if platform:
      platform.add_character(self, **kargs)
      self.next_state.look_at(soya.Vector(platform, 0.0, 0.0, -1.0) % platform.level)
      
      self.set_animation("attente")
      self.dying = 0
      self.speed.set_identity()
      
  def get_platid(self):
    if self.platform     : return self.platform     .platid
    if self.next_platform: return self.next_platform.platid
    return 0
  platid = property(get_platid)
  
  def find_next_platform(self, position = None, front = None, power = None, max_angle = 75.0, angle_factor = 0.07, exclude = []):
    if not position: position = self
    if not front   : front    = self.front
    if not power   : power    = self.power
    
    best_platform = None
    best_distance = power
    
    for platform in self.level.mobiles:
      if isinstance(platform, Platform) and (not platform is self) and (not platform is self.platform) and platform.suitable_for(self) and (not platform in exclude):
        if isinstance(self.platform, Character) and (self.platform.next_platform is platform) and (not self.platform.platform): continue
        if isinstance(platform, Character) and platform.dying: continue
        V1.set_start_end(position, platform.platform_position)
        if V1.y <= 0.0: V1.y /= 100.0 # Don't limit how far the character can fall down.
        
        angle = front.angle_to(V1)
        
        if (angle < max_angle) and V1.y < 2.5:
          if (V1.y > 1.0) and isinstance(platform, Character): continue
          distance = V1.length() + angle_factor * angle
          
          if distance < best_distance:
            best_distance = distance
            best_platform = platform
            
    if best_platform: best_platform.set_next_for_character(self)
    return best_platform
  
  def compute_trajectory(self, start_position, end_position, jump_proportion):
    global P1, V1
    V1.set_start_end(self, end_position)
    V1.convert_to(self)
    V1 *= self.speed_factor / (1.0 - jump_proportion)
    self.speed.set_identity()
    self.speed.move(V1)
    self.speed.y += -0.4 * (((jump_proportion - 4.0 * self.speed_factor) * 2.0) - 1.0)
    
    V1.set_start_end(start_position, end_position)
    V1.y = 0.0
    angle = min(self.front.angle_to(V1), 100.0 * self.speed_factor)
    
    P1.clone(end_position)
    P1.convert_to(self)
    if P1.x > 0.0: angle *= -1.0
    
    self.speed.rotate_lateral(angle)
    
  def can_kill    (self, character): return 1
  def want_to_kill(self, character): return self.can_kill(character)
  
  def die(self, dying_sens = None, move = 1):
    if (not self.dying) or (self.dying > 20):
      self.set_current_state_importance(2)
      self.dying = 1
      
      self.jump_start_position.clone(self)
      self.next_platform = None
      self.set_animation("couicavant")
      if self.platform:
        self.platform.remove_character(self)
        self.platform = None
      if move:
        if not dying_sens: dying_sens = soya.Vector(self, 0.0, 0.4, -0.2)
        look_dir = dying_sens % self.level
        look_dir.y = 0.0
        self.next_state.look_at(look_dir)
        dying_sens = dying_sens % self.next_state
        self.speed.set_xyz(dying_sens.x, dying_sens.y, dying_sens.z)
        
    if self.characters_on:
      V1.__init__(self, 0.0, 0.0, -1.0)
      self.characters_on[0].look_at(V1)
      self.characters_on[0].next_state.look_at(V1)
      self.characters_on[0].set_animation("freresurf")
      self.characters_on[0].set_current_state_importance(2)
      soya.SoundPlayer(self, soya.Sound.get("brother_surf.wav"))
      
  def kill(self):
    if not self.dying: self.dying = 1 # Must have dying == 1 for being killed
    for character in self.characters_on:
      character.kill()
    super(Character, self).kill()
    
  @tofu.side("client")
  def start_discussion(self, gettext_key): pass
  
  @tofu.side("single", "server")
  def start_discussion(self, gettext_key):
    self.send_message(MESSAGE_DISCUSSION + gettext_key.encode("utf8"))
    
  def do_action(self, action):
    if   action[0] == ACTION_JUMP: self.want_to_jump = 1
    
    elif action[0] == ACTION_STOP_JUMPING: self.want_to_jump = 0
    
    elif action[0] == ACTION_SAY:
      if self.current_discussion: self.send_message(MESSAGE_SAY)
      
    elif action[0] == ACTION_CHAT:
      self.send_message(action)
      
    else: raise ValueError("Unkown action code '%s'!" % code)
    
  def jump(self):
    if self.next_platform:
      self.wait_before_suicide = 20
      if self.platform: self.jump_start_position.clone(self.platform.platform_position)
      else:             self.jump_start_position.clone(self)
      self.jump_start_position.convert_to(self.level)
      self.jump_proportion = 0.0
      self.set_animation("saute")
      if self.platform:
        self.platform.remove_character(self)
        self.platform = None
      self.set_current_state_importance(2)
    else:
      if self.wait_before_suicide: self.wait_before_suicide -= 1
      else:                        self.die()
      
  def jump_ended(self):
    self.set_current_state_importance(2)
    self.platform.add_character(self)
    
    if not self.platform: return # Occurs if the platform is already occuped by someone you cannot kill. Implies that the character is currently dying.
    soya.SoundPlayer(self, soya.Sound.get(self.platform.FALL_SOUND))
    self.speed.set_identity()
    self.set_animation("attente")
    
  def do_physics(self):
    if self.platform:
      if not self.current_animation: self.set_animation("attente")
      
    if self.dying:
      
      #if self.dying == 1:
      #  self.set_current_state_importance(2)
      self.set_current_state_importance(1)
      if self.dying <  60:
        #if   self.dying == 1: self.speed.turn_vertical(-5.0)
        #elif self.dying == 8: self.speed.turn_vertical( 5.0)
        if self.characters_on:
          self.speed.y -= 0.01
        else:
          self.speed.y -= 0.02
          
      if self.characters_on:
        self.dying += 0.25
      else:
        if self.dying == 10.0:
          soya.SoundPlayer(self, soya.Sound.get(self.COUIC_SOUND))
        self.dying += 1
        
    elif not self.platform:
      self.set_current_state_importance(1)
      if self.jump_proportion < 0.96: # Jumping
        self.compute_trajectory(self.jump_start_position, self.next_platform.platform_position, self.jump_proportion)
        
        if (self.jump_proportion > 0.8) and not self.current_animation.startswith("attente"):
          self.set_animation("attente")
          
      else: # Jump is ended.
        self.platform = self.next_platform
        self.jump_ended()
        
    if self.dying and self.characters_on:
      self.speed.set_xyz(self.speed.x / 2.0, self.speed.y / 2.0, self.speed.z / 2.0)
      
    super(Character, self).do_physics()
    
    if self.dying and self.characters_on:
      self.speed.set_xyz(self.speed.x * 2.0, self.speed.y * 2.0, self.speed.z * 2.0)
      
  def do_collisions(self):
    if self.y < -50.0:
      self.kill()
      return
    
    if self.platform:
      next_platform = self.find_next_platform()
      if not next_platform is self.next_platform:
        self.next_platform = next_platform
        self.set_current_state_importance(2)
        
      if self.want_to_jump: self.jump()
      else:                 self.wait_before_suicide = 20
      
  def get_discussion(self, gettext_key):
    characters = { "owner" : self }
    if isinstance(self, Balazar):
      characters["red" ], characters["blue"] = self.get_teamates()
      
    return balazar_brothers.discussion.Discussion(gettext_key, characters)
    
  def add_character(self, character, change_level = 0):
    Platform.add_character(self, character)
    animation = (self.current_animation or "attente").split("_")[0]
    if animation == "bonus": animation = "attente"
    self.set_animation(animation)
    character.set_animation("attente")
    
  def remove_character(self, character):
    Platform.remove_character(self, character)
    animation = (self.current_animation or "attente").split("_")[0]
    if animation == "bonus": animation = "attente"
    self.set_animation(animation)
    
  def set_animation(self, animation, fade = 0.1):
    if (animation == "attente") and (self.current_animation.startswith("bonus")) and (not self.characters_on): return
    if animation == "bonus" and self.characters_on: return
    if   animation == "attente":
      if   self.characters_on:                   animation += "_portage"
      elif isinstance(self.platform, Character): animation += "_porte"
    elif animation == "saute":
      if   self.characters_on:                   animation += "_portage"
    if not animation.endswith(self.ANIMATION_SUFFIX): animation += self.ANIMATION_SUFFIX
    
    super(Character, self).set_animation(animation, fade)
    
  def advance_time(self, proportion):
    if not self.platform:
      if self.dying: pass
      else: self.jump_proportion += proportion * self.speed_factor
      
    super(Character, self).advance_time(proportion)
    


class Balazar(Character):
  def __init__(self):
    Character.__init__(self)
    
    self.events              = []
    self.previous_level_name = ""
    
    self.score = 0
    self.keys  = 0

  @tofu.side("client")
  def loaded(self):
    Character.loaded(self)
    
    label = soya.label3d.Label3D(self, self.player_name, font = balazar_brothers.main_loop.BIG_FONT, size = 0.01)
    label.y = 3.5
    label.lit = 0
    label.auto_flip = 1
    
  def want_to_kill(self, character):
    if isinstance(character, Balazar) and (character.player_name == self.player_name): return 0
    return Character.want_to_kill(self, character)
  
  def control_owned(self):
    super(Balazar, self).control_owned()
    
    soya.MAIN_LOOP.camera.zap()
    self.arrow.visible = 1
    
  def generate_actions(self):
    for event in self.events:
      if   event == ACTION_JUMP:         self.send_action(ACTION_JUMP + ((self.next_platform and self.next_platform.dumpsuid()) or struct.pack("!H", 0)))
      elif event == ACTION_STOP_JUMPING: self.send_action(ACTION_STOP_JUMPING)
      elif event == ACTION_SAY         : self.send_action(ACTION_SAY)
    self.events *= 0
    
    
  @tofu.side("server")
  def get_teamates(self):
    player = tofu.Player.get(self.player_name)
    return [player.mobiles[0], player.mobiles[-1]]
    
  @tofu.side("single", "client")
  def get_teamates(self):
    if soya.MAIN_LOOP.traveling.characters:
      return [soya.MAIN_LOOP.traveling.characters[ 0], soya.MAIN_LOOP.traveling.characters[-1]]
      
    else:
      teamates = [None, None]
      level = self.level
      if not level:
        level = self.platform
        while not isinstance(level, balazar_brothers.level.Level): level = level.parent
      if level:
        for i in level.recursive():
          if isinstance(i, Character):
            if i.player_name == self.player_name:
              if   isinstance(i, RedBalazar ): teamates[0] = i
              elif isinstance(i, BlueBalazar): teamates[1] = i
      return teamates
    
  def added_into(self, level):
    super(Balazar, self).added_into(level)
    
  def do_message(self, message):
    if   message.startswith(MESSAGE_UPDATE_SCORE):
      self.score, self.keys = struct.unpack("!HH", message[1:])
      
    elif message.startswith(MESSAGE_DISCUSSION):
      self.do_discussion(message[1:].decode("utf-8"))
      
    elif message.startswith(MESSAGE_SAY):
      self.current_discussion.on_validate()
      
    elif message.startswith(MESSAGE_CHAT):
      self.do_say_chat(message[1:].decode("utf-8"))
      
    elif message.startswith(MESSAGE_SOUND):
      if " " in message:
        sound, gain = message[1:].split(" ")
        gain = int(gain)
      else:
        sound = message[1:]
        gain = 1.0
      soya.SoundPlayer(self, soya.Sound.get(sound), gain = gain)
    else: raise ValueError("Unknown message code '%s'!" % message[0])
    
  @tofu.side("server")
  def do_discussion(self, gettextkey):
    discussion = self.get_discussion(gettextkey) # Sets self.current_discussion
    
  @tofu.side("single", "client")
  def do_discussion(self, gettextkey):
    discussion = self.get_discussion(gettextkey)
    if discussion.can_say(): discussion.show()
    
  @tofu.side("server")
  def do_say_chat(self, text):
    print "* BalazarBrothers * %s says '%s'" % (self.player_name, text)
    
  @tofu.side("single", "client")
  def do_say_chat(self, text):
    from balazar_brothers.discussion import ChatLabel
    ChatLabel(soya.MAIN_LOOP.root_widget, self, text)

class BlueBalazar(Balazar):
  ANIMATION_SUFFIX = "_blu"
  
  def __init__(self):
    Balazar.__init__(self)
    
    self.set_model(soya.AnimatedModel.get("balazar"), ["perso"])
    
    self.arrow = Arrow(self, (0.3, 0.0, 1.0, 1.0))
    self.arrow.visible = 0
    
  def control_owned(self):
    Balazar.control_owned(self)

    for i in soya.MAIN_LOOP.traveling.characters[:]:
      if isinstance(i, self.__class__): soya.MAIN_LOOP.traveling.characters.remove(i)
    soya.MAIN_LOOP.traveling.characters.insert(1, self)
    
    soya.MAIN_LOOP.score_label.character = soya.MAIN_LOOP.keys_label.character = self
    
  def have_said___quit_None_blue__(self, discussion):
    if not self.controller.remote: soya.MAIN_LOOP.stop()
cerealizer.register(BlueBalazar)
    
    
class RedBalazar(Balazar):
  ANIMATION_SUFFIX = "_red"
  
  def __init__(self):
    Balazar.__init__(self)
    
    self.set_model(soya.AnimatedModel.get("balazar@rouge"), ["perso"])
    
    self.arrow = Arrow(self, (1.0, 0.2, 0.2, 1.0))
    self.arrow.visible = 0
    
  def control_owned(self):
    Balazar.control_owned(self)
    
    for i in soya.MAIN_LOOP.traveling.characters[:]:
      if isinstance(i, self.__class__): soya.MAIN_LOOP.traveling.characters.remove(i)
    soya.MAIN_LOOP.traveling.characters.insert(0, self)
    
  def have_said___quit_None_red__(self, discussion):
    if not self.doer.remote: tofu.Player.get(self.player_name).restart_world()
cerealizer.register(RedBalazar)

    
import soya.opengl as opengl

class Arrow(soya.PythonCoordSyst):
  def __init__(self, parent = None, color = (1.0, 1.0, 1.0, 1.0)):
    soya.PythonCoordSyst.__init__(self, parent)
    
    self.color = color
    
  def batch(self):
    if self.color[3] < 1.0: return 2, self, None
    else:                   return 1, self, None

  def render(self):
    character = self.parent
    if character.platform and character.next_platform:
      P1.clone(character.next_platform.platform_position)
      P1.convert_to(self)
      
    elif not character.platform:
      if character.next_platform:
        P1.clone(character.next_platform.platform_position)
        P1.convert_to(self)
      else: return
    else: return
    
    self.look_at(self.parent.next_platform.platform_position)
    
    soya.DEFAULT_MATERIAL.activate()
    opengl.glDisable(opengl.GL_TEXTURE_2D)
    opengl.glDisable(opengl.GL_CULL_FACE)
    opengl.glDisable(opengl.GL_LIGHTING)
    opengl.glColor4f(*self.color)
    opengl.glBegin(opengl.GL_LINES)

    dy = 0.0
    for i in range(6):
      f1 = (i + 0.0) / 6.0
      f2 = (i + 1.0) / 6.0

      z1 = P1.z * f1
      z2 = P1.z * f2

      y1 = P1.y * f1 + dy; dy -= 0.6 * (2.0 * f1 - 1.0)
      y2 = P1.y * f2 + dy

      if i == 5:
        opengl.glVertex3f(-0.15, y1, z1)
        opengl.glVertex3f(-0.4, y1, z1)
        opengl.glVertex3f( 0.15, y1, z1)
        opengl.glVertex3f( 0.4, y1, z1)
        
        opengl.glVertex3f(-0.4, y1, z1)
        opengl.glVertex3f(-0.0, y2, z2)
        opengl.glVertex3f( 0.0, y2, z2)
        opengl.glVertex3f( 0.4, y1, z1)
      else:
        opengl.glVertex3f(-0.15, y1, z1)
        opengl.glVertex3f(-0.15, y2, z2)
        opengl.glVertex3f( 0.15, y2, z2)
        opengl.glVertex3f( 0.15, y1, z1)

    opengl.glEnd()
    
    opengl.glEnable(opengl.GL_CULL_FACE)
    opengl.glEnable(opengl.GL_LIGHTING)
cerealizer.register(Arrow)