First commit

manim_presentation/slide.py

@@ -0,0 +1,74 @@
+import os
+import json
+import shutil
+from manim import Scene
+
+class Slide(Scene):
+    def __init__(self, *args, **kwargs):
+        self.output_folder = kwargs.pop("output_folder", "./presentation")
+        super(Slide, self).__init__(*args, **kwargs)
+        self.slides = list()
+        self.current_slide = 1
+        self.current_animation = 0
+        self.loop_start_animation = None
+        self.pause_start_animation = 0
+
+    def play(self, *args, **kwargs):
+        super(Slide, self).play(*args, **kwargs)
+        self.current_animation += 1
+    
+    def pause(self):
+        self.slides.append(dict(
+            type="slide",
+            start_animation=self.pause_start_animation,
+            end_animation=self.current_animation,
+            number=self.current_slide
+        ))
+        self.current_slide += 1
+        self.pause_start_animation = self.current_animation
+    
+    def start_loop(self):
+        assert self.loop_start_animation is None, "You cant nest loops"
+        self.loop_start_animation = self.current_animation
+    
+    def end_loop(self):
+        assert self.loop_start_animation is not None, "You have to start a loop before ending it"
+        self.slides.append(dict(
+            type="loop",
+            start_animation=self.loop_start_animation,
+            end_animation=self.current_animation,
+            number=self.current_slide
+        ))
+        self.current_slide += 1
+        self.loop_start_animation = None
+    
+    def render(self, *args, **kwargs):
+        super(Slide, self).render(*args, **kwargs)
+        if not os.path.exists(self.output_folder):
+            os.mkdir(self.output_folder)
+        
+        files_folder = os.path.join(self.output_folder, "files")
+        if not os.path.exists(files_folder):
+            os.mkdir(files_folder)
+        
+        scene_name = type(self).__name__
+        scene_files_folder = os.path.join(files_folder, scene_name)
+        
+        if os.path.exists(scene_files_folder):
+            shutil.rmtree(scene_files_folder)
+        
+        if not os.path.exists(scene_files_folder):    
+            os.mkdir(scene_files_folder)
+        
+        files = list()
+        for src_file in self.renderer.file_writer.partial_movie_files:
+            dst_file = os.path.join(scene_files_folder, os.path.basename(src_file))
+            shutil.copyfile(src_file, dst_file)
+            files.append(dst_file)
+
+        f = open(os.path.join(self.output_folder, "%s.json" % (scene_name, )), "w")
+        json.dump(dict(
+            slides=self.slides,
+            files=files
+        ), f)
+        f.close()