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Mildly more efficient CameraFrame.get_view_matrix()

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Grant Sanderson 2024-08-19 16:54:29 -05:00
parent c064b11e2a
commit 058914fdd2
1 changed files with 6 additions and 7 deletions
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13
manimlib/camera/camera_frame.py
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@ -38,6 +38,7 @@ class CameraFrame(Mobject):
self.default_orientation = Rotation.identity() self.default_orientation = Rotation.identity()
self.view_matrix = np.identity(4) self.view_matrix = np.identity(4)
self.id4x4 = np.identity(4)
self.camera_location = OUT # This will be updated by set_points self.camera_location = OUT # This will be updated by set_points
self.euler_axes = euler_axes self.euler_axes = euler_axes
@ -100,17 +101,15 @@ class CameraFrame(Mobject):
into the camera's internal coordinate system into the camera's internal coordinate system
""" """
if self._data_has_changed: if self._data_has_changed:
shift = np.identity(4) shift = self.id4x4.copy()
rotation = np.identity(4) rotation = self.id4x4.copy()
scale_mat = np.identity(4)
scale = self.get_scale()
shift[:3, 3] = -self.get_center() shift[:3, 3] = -self.get_center()
rotation[:3, :3] = self.get_inverse_camera_rotation_matrix() rotation[:3, :3] = self.get_inverse_camera_rotation_matrix()
scale = self.get_scale() np.dot(rotation, shift, out=self.view_matrix)
if scale > 0: if scale > 0:
scale_mat[:3, :3] /= self.get_scale() self.view_matrix[:3, :4] /= scale
self.view_matrix = np.dot(scale_mat, np.dot(rotation, shift))
return self.view_matrix return self.view_matrix