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annotate pytouhou/game/background.py @ 792:11bc22bad1bf

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python: Replace the image crate with png We weren’t using any of its features anyway, so the png crate is exactly what we need, without the many heavy dependencies of image. https://github.com/image-rs/image-png/pull/670 will eventually make it even faster to build.
author Link Mauve <linkmauve@linkmauve.fr>
date Sat, 17 Jan 2026 22:22:25 +0100
parents d1f0bb0b7a17
children
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1 # -*- encoding: utf-8 -*-
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2 ##
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3 ## Copyright (C) 2011 Thibaut Girka <thib@sitedethib.com>
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4 ##
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5 ## This program is free software; you can redistribute it and/or modify
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6 ## it under the terms of the GNU General Public License as published
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7 ## by the Free Software Foundation; version 3 only.
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8 ##
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9 ## This program is distributed in the hope that it will be useful,
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10 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 ## GNU General Public License for more details.
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13 ##
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16 from pytouhou.utils.interpolator import Interpolator
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17 from pytouhou.vm import ANMRunner
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18 from pytouhou.game.sprite import Sprite
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21 class Background:
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22 def __init__(self, stage, anm):
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23 self.stage = stage
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24 self.anm = anm
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25 self.last_frame = -1
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27 self.models = []
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28 self.object_instances = []
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29 self.anm_runners = []
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31 self.position_interpolator = Interpolator((0, 0, 0))
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32 self.fog_interpolator = Interpolator((0, 0, 0, 0, 0))
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33 self.position2_interpolator = Interpolator((0, 0, 0))
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35 self.build_models()
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36 self.build_object_instances()
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39 def build_object_instances(self):
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40 self.object_instances = []
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41 for model_id, ox, oy, oz in self.stage.object_instances:
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42 self.object_instances.append((ox, oy, oz, model_id, self.models[model_id]))
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43 # Z-sorting:
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44 # TODO z-sorting may be needed at each iteration
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45 def keyfunc(obj):
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46 return obj[2] + self.stage.models[obj[3]].bounding_box[2]
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47 self.object_instances.sort(key=keyfunc, reverse=True)
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50 def build_models(self):
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51 self.models = []
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52 for obj in self.stage.models:
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53 quads = []
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54 for script_index, ox, oy, oz, width_override, height_override in obj.quads:
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55 sprite = Sprite(width_override, height_override)
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56 anm_runner = ANMRunner(self.anm, script_index, sprite)
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57 quads.append((ox, oy, oz, width_override, height_override, sprite))
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58 self.anm_runners.append(anm_runner)
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59 self.models.append(quads)
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62 def update(self, frame):
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63 for frame_num, message_type, args in self.stage.script:
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64 if self.last_frame < frame_num <= frame:
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65 if message_type == 0:
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66 self.position_interpolator.set_interpolation_start(frame_num, args)
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67 elif message_type == 1:
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68 self.fog_interpolator.set_interpolation_end_values(args)
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69 elif message_type == 2:
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70 self.position2_interpolator.set_interpolation_end_values(args)
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71 elif message_type == 3:
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72 duration, = args
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73 self.position2_interpolator.set_interpolation_end_frame(frame_num + duration)
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74 elif message_type == 4:
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75 duration, = args
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76 self.fog_interpolator.set_interpolation_end_frame(frame_num + duration)
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77 if frame_num > frame and message_type == 0:
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78 self.position_interpolator.set_interpolation_end(frame_num, args)
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79 break
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81 for i in range(frame - self.last_frame):
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82 for anm_runner in tuple(self.anm_runners):
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83 if not anm_runner.run_frame():
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84 self.anm_runners.remove(anm_runner)
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86 self.position2_interpolator.update(frame)
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87 self.fog_interpolator.update(frame)
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88 self.position_interpolator.update(frame)
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90 self.last_frame = frame
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