from PIL import Image from colour import Color import numpy as np import itertools as it import warnings import time import os import copy import progressbar import inspect from helpers import * import displayer as disp from tk_scene import TkSceneRoot from mobject import Mobject from animation.transform import ApplyMethod class Scene(object): DEFAULT_CONFIG = { "height" : DEFAULT_HEIGHT, "width" : DEFAULT_WIDTH , "frame_duration" : DEFAULT_FRAME_DURATION, "construct_args" : [], "background" : None, "start_dither_time" : DEFAULT_DITHER_TIME, "announce_construction" : False, } def __init__(self, **kwargs): digest_config(self, kwargs) if self.announce_construction: print "Constructing %s..."%str(self) if self.background: self.original_background = np.array(background) #TODO, Error checking? else: self.original_background = np.zeros( (self.height, self.width, 3), dtype = 'uint8' ) self.background = self.original_background self.frames = [self.background] self.mobjects = [] self.construct(*self.construct_args) def construct(self): pass #To be implemented in subclasses def __str__(self): if hasattr(self, "name"): return self.name return self.__class__.__name__ + \ self.args_to_string(*self.construct_args) def set_name(self, name): self.name = name return self def get_frame(self): return self.frames[-1] def set_frame(self, frame): self.frames[-1] = frame return self def add(self, *mobjects): """ Mobjects will be displayed, from background to foreground, in the order with which they are entered. """ if not all_elements_are_instances(mobjects, Mobject): raise Exception("Adding something which is not a mobject") self.set_frame(disp.paint_mobjects(mobjects, self.get_frame())) old_mobjects = filter(lambda m : m not in mobjects, self.mobjects) self.mobjects = old_mobjects + list(mobjects) return self def add_mobjects_among(self, values): """ So a scene can just add all mobjects it's defined up to that point by calling add_mobjects_among(locals().values()) """ mobjects = filter(lambda x : isinstance(x, Mobject), values) self.add(*mobjects) return self def remove(self, *mobjects): if not all_elements_are_instances(mobjects, Mobject): raise Exception("Removing something which is not a mobject") mobjects = filter(lambda m : m in self.mobjects, mobjects) if len(mobjects) == 0: return self.mobjects = filter(lambda m : m not in mobjects, self.mobjects) self.repaint_mojects() return self def bring_to_front(self, mobject): self.add(mobject) return self def bring_to_back(self, mobject): self.remove(mobject) self.mobjects = [mobject] + self.mobjects self.repaint_mojects() return self def clear(self): self.reset_background() self.mobjects = [] self.set_frame(self.background) return self def highlight_region(self, region, color = None): self.background = disp.paint_region( region, image_array = self.background, color = color, ) self.repaint_mojects() return self def highlight_region_over_time_range(self, region, time_range = None, color = "black"): if time_range: frame_range = map(lambda t : t / self.frame_duration, time_range) frame_range[0] = max(frame_range[0], 0) frame_range[1] = min(frame_range[1], len(self.frames)) else: frame_range = (0, len(self.frames)) for index in range(frame_range[0], frame_range[1]): self.frames[index] = disp.paint_region( region, image_array = self.frames[index], color = color ) def reset_background(self): self.background = self.original_background return self def repaint_mojects(self): self.set_frame(disp.paint_mobjects(self.mobjects, self.background)) return self def paint_into_background(self, *mobjects): #This way current mobjects don't have to be redrawn with #every change, and one can later call "apply" without worrying #about it applying to these mobjects self.background = disp.paint_mobjects(mobjects, self.background) return self def set_frame_as_background(self): self.background = self.get_frame() def play(self, *animations, **kwargs): if "run_time" in kwargs: run_time = kwargs["run_time"] else: run_time = animations[0].run_time for animation in animations: animation.set_run_time(run_time) moving_mobjects = [ mobject for anim in animations for mobject in anim.mobject.get_full_submobject_family() ] bundle = Mobject(*self.mobjects) static_mobjects = filter( lambda m : m not in moving_mobjects, bundle.get_full_submobject_family() ) background = disp.paint_mobjects( static_mobjects, self.background, include_sub_mobjects = False ) print "Generating " + ", ".join(map(str, animations)) progress_bar = progressbar.ProgressBar(maxval=run_time) progress_bar.start() for t in np.arange(0, run_time, self.frame_duration): progress_bar.update(t) for animation in animations: animation.update(t / animation.run_time) new_frame = disp.paint_mobjects(moving_mobjects, background) self.frames.append(new_frame) for animation in animations: animation.clean_up() self.add(*moving_mobjects) self.repaint_mojects() progress_bar.finish() return self def play_over_time_range(self, t0, t1, *animations): needed_scene_time = max(abs(t0), abs(t1)) existing_scene_time = len(self.frames)*self.frame_duration if existing_scene_time < needed_scene_time: self.dither(needed_scene_time - existing_scene_time) existing_scene_time = needed_scene_time #So negative values may be used if t0 < 0: t0 = float(t0)%existing_scene_time if t1 < 0: t1 = float(t1)%existing_scene_time t0, t1 = min(t0, t1), max(t0, t1) moving_mobjects = [anim.mobject for anim in animations] for t in np.arange(t0, t1, self.frame_duration): for animation in animations: animation.update((t-t0)/(t1 - t0)) index = int(t/self.frame_duration) self.frames[index] = disp.paint_mobjects(moving_mobjects, self.frames[index]) for animation in animations: animation.clean_up() return self def apply(self, mobject_method, *args, **kwargs): self.play(ApplyMethod(mobject_method, *args, **kwargs)) def dither(self, duration = DEFAULT_DITHER_TIME): self.frames += [self.get_frame()]*int(duration / self.frame_duration) return self def repeat(self, num): self.frames = self.frames*num return self def write_to_movie(self, name = None): if len(self.frames) == 0: print "No frames, I'll just save an image instead" self.show_frame() self.save_image(name = name) return disp.write_to_movie(self, name or str(self)) def show_frame(self): Image.fromarray(self.get_frame()).show() def preview(self): TkSceneRoot(self) def save_image(self, directory = MOVIE_DIR, name = None): path = os.path.join(directory, name or str(self)) + ".png" Image.fromarray(self.get_frame()).save(path) # To list possible args that subclasses have # Elements should always be a tuple args_list = [] # For subclasses to turn args in the above # list into stings which can be appended to the name @staticmethod def args_to_string(*args): return "" @staticmethod def string_to_args(string): raise Exception("string_to_args Not Implemented!")