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Improved scrolling

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This commit is contained in:
Grant Sanderson
2021-01-19 14:12:25 -08:00
parent e08784400a
commit e4f888fbc4
1 changed files with 9 additions and 2 deletions
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11
manimlib/scene/scene.py
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@@ -519,9 +519,12 @@ class Scene(object):
frame.increment_theta(-d_point[0])
frame.increment_phi(d_point[1])
elif self.window.is_key_pressed(ord("s")):
shift = -d_point
shift[0] *= frame.get_width() / 2
shift[1] *= frame.get_height() / 2
transform = frame.get_inverse_camera_rotation_matrix()
shift = np.dot(np.transpose(transform), d_point)
frame.shift(-frame.get_height() * shift / 2)
shift = np.dot(np.transpose(transform), shift)
frame.shift(shift)
def on_mouse_drag(self, point, d_point, buttons, modifiers):
self.mouse_drag_point.move_to(point)
@@ -537,6 +540,10 @@ class Scene(object):
if self.window.is_key_pressed(ord("z")):
factor = 1 + np.arctan(10 * offset[1])
frame.scale(factor, about_point=point)
else:
transform = frame.get_inverse_camera_rotation_matrix()
shift = np.dot(np.transpose(transform), offset)
frame.shift(-20.0 * shift)
def on_key_release(self, symbol, modifiers):
pass