VectorAdditionNumerically

manim.py

@@ -37,8 +37,12 @@ if __name__ == "__main__":
     # sys.argv.extend(['old_projects/eola/chapter1.py', 'HelpsToHaveOneThought', '-pl'])
     # sys.argv.extend(['old_projects/eola/chapter1.py', 'HowIWantYouToThinkAboutVectors', '-pl'])
     # sys.argv.extend(['old_projects/eola/chapter1.py', 'ListsOfNumbersAddOn', '-pl'])
-    sys.argv.extend(['old_projects/eola/chapter1.py', 'CoordinateSystemWalkthrough', '-pl'])
-
+    # sys.argv.extend(['old_projects/eola/chapter1.py', 'CoordinateSystemWalkthrough', '-pl'])
+    # sys.argv.extend(['old_projects/eola/chapter1.py', 'WriteZ', '-pl'])
+    # sys.argv.extend(['old_projects/eola/chapter1.py', 'Write3DVector', '-pl']) # 2 1 3 从上到下分步显示
+    # sys.argv.extend(['old_projects/eola/chapter1.py', 'VectorAddition', '-pl'])
+    # sys.argv.extend(['old_projects/eola/chapter1.py', 'AddingNumbersOnNumberLine', '-pl'])
+    sys.argv.extend(['old_projects/eola/chapter1.py', 'VectorAdditionNumerically', '-pl'])
 
     manimlib.main()
 else:

manimlib/scene/vector_space_scene.py

@@ -256,7 +256,7 @@ class VectorScene(Scene):
             vector = np.append(np.array(vector), 0.0)
         x_max = int(FRAME_X_RADIUS + abs(vector[0]))
         y_max = int(FRAME_Y_RADIUS + abs(vector[1]))
-        dots = VMobject(*[
+        dots = VGroup(*[
             Dot(x * RIGHT + y * UP)
             for x in range(-x_max, x_max)
             for y in range(-y_max, y_max)

old_projects/eola/chapter1.py

@@ -871,8 +871,8 @@ class VectorAdditionNumerically(VectorScene):
         x1, y1 = coords1.get_mob_matrix().flatten()
         x2, y2 = coords2.get_mob_matrix().flatten()
         sum_x, sum_y = sum_coords.get_mob_matrix().flatten()
-        sum_x_start = VMobject(x1, x2).copy()
-        sum_y_start = VMobject(y1, y2).copy()
+        sum_x_start = VGroup(x1, x2).copy()
+        sum_y_start = VGroup(y1, y2).copy()
         self.play(
             Write(brackets),
             Write(equals),
@@ -895,8 +895,8 @@ class VectorAdditionNumerically(VectorScene):
             var.move_to(starter)
         self.play(
             Transform(
-                VMobject(*starters[:4]), 
-                VMobject(*variables[:4])
+                VGroup(*starters[:4]), 
+                VGroup(*variables[:4])
             ),
             FadeOut(sum_x_start), 
             FadeOut(sum_y_start)
@@ -904,10 +904,10 @@ class VectorAdditionNumerically(VectorScene):
         sum_x_end, sum_y_end = variables[-2:]
         self.wait(2)
         self.play(
-            Transform(VMobject(x1, x2).copy(), sum_x_end)
+            Transform(VGroup(x1, x2).copy(), sum_x_end)
         )
         self.play(
-            Transform(VMobject(y1, y2).copy(), sum_y_end)
+            Transform(VGroup(y1, y2).copy(), sum_y_end)
         )
         self.wait(3)