prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <issue>
  Camera API documentation missing
  I could not find a list of available cameras in the docs:
  
  http://vispy.org/scene.html?highlight=cameras#module-vispy.scene.cameras
  
  
  </issue>
  <code>
  [start of vispy/scene/cameras/__init__.py]
  1 # -*- coding: utf-8 -*-
  2 # Copyright (c) Vispy Development Team. All Rights Reserved.
  3 # Distributed under the (new) BSD License. See LICENSE.txt for more info.
  4 """
  5 Cameras are responsible for determining which part of a scene is displayed
  6 in a viewbox and for handling user input to change the view.
  7 
  8 Several Camera subclasses are available to customize the projection of the 
  9 scene such as 3D perspective and orthographic projections, 2D 
  10 scale/translation, and other specialty cameras. A variety of user interaction
  11 styles are available for each camera including arcball, turntable, 
  12 first-person, and pan/zoom interactions.
  13 
  14 Internally, Cameras work by setting the transform of a SubScene object such 
  15 that a certain part of the scene is mapped to the bounding rectangle of the 
  16 ViewBox.
  17 """
  18 from ._base import make_camera  # noqa
  19 from .base_camera import BaseCamera  # noqa
  20 from .panzoom import PanZoomCamera  # noqa
  21 from .arcball import ArcballCamera  # noqa
  22 from .turntable import TurntableCamera  # noqa
  23 from .fly import FlyCamera  # noqa
  24 from .magnify import MagnifyCamera, Magnify1DCamera  # noqa
  25
  [end of vispy/scene/cameras/__init__.py]
  </code>
  
  I need you to solve this issue by generating a single patch file that I can apply directly to this repository using git apply. Please respond with a single patch file in the following format.
  <patch>
  diff --git a/file.py b/file.py
  --- a/file.py
  +++ b/file.py
  @@ -1,27 +1,35 @@
   def euclidean(a, b):
  -    while b:
  -        a, b = b, a % b
  -    return a
  +    if b == 0:
  +        return a
  +    return euclidean(b, a % b)
   
   
   def bresenham(x0, y0, x1, y1):
       points = []
       dx = abs(x1 - x0)
       dy = abs(y1 - y0)
  -    sx = 1 if x0 < x1 else -1
  -    sy = 1 if y0 < y1 else -1
  -    err = dx - dy
  +    x, y = x0, y0
  +    sx = -1 if x0 > x1 else 1
  +    sy = -1 if y0 > y1 else 1
   
  -    while True:
  -        points.append((x0, y0))
  -        if x0 == x1 and y0 == y1:
  -            break
  -        e2 = 2 * err
  -        if e2 > -dy:
  -            err -= dy
  -            x0 += sx
  -        if e2 < dx:
  -            err += dx
  -            y0 += sy
  +    if dx > dy:
  +        err = dx / 2.0
  +        while x != x1:
  +            points.append((x, y))
  +            err -= dy
  +            if err < 0:
  +                y += sy
  +                err += dx
  +            x += sx
  +    else:
  +        err = dy / 2.0
  +        while y != y1:
  +            points.append((x, y))
  +            err -= dx
  +            if err < 0:
  +                x += sx
  +                err += dy
  +            y += sy
  +
  +    points.append((x, y))
       return points
  
  </patch>
golden_diff: diff --git a/vispy/scene/cameras/__init__.py b/vispy/scene/cameras/__init__.py
  --- a/vispy/scene/cameras/__init__.py
  +++ b/vispy/scene/cameras/__init__.py
  @@ -15,6 +15,9 @@
   that a certain part of the scene is mapped to the bounding rectangle of the 
   ViewBox.
   """
  +__all__ = ['ArcballCamera', 'BaseCamera', 'FlyCamera', 'MagnifyCamera',
  +           'Magnify1DCamera', 'PanZoomCamera', 'TurntableCamera']
  +
   from ._base import make_camera  # noqa
   from .base_camera import BaseCamera  # noqa
   from .panzoom import PanZoomCamera  # noqa
  
verification_info: {"golden_diff": "diff --git a/vispy/scene/cameras/__init__.py b/vispy/scene/cameras/__init__.py\n--- a/vispy/scene/cameras/__init__.py\n+++ b/vispy/scene/cameras/__init__.py\n@@ -15,6 +15,9 @@\n that a certain part of the scene is mapped to the bounding rectangle of the \n ViewBox.\n \"\"\"\n+__all__ = ['ArcballCamera', 'BaseCamera', 'FlyCamera', 'MagnifyCamera',\n+           'Magnify1DCamera', 'PanZoomCamera', 'TurntableCamera']\n+\n from ._base import make_camera  # noqa\n from .base_camera import BaseCamera  # noqa\n from .panzoom import PanZoomCamera  # noqa\n", "issue": "Camera API documentation missing\nI could not find a list of available cameras in the docs:\n\nhttp://vispy.org/scene.html?highlight=cameras#module-vispy.scene.cameras\n\n", "before_files": [{"content": "# -*- coding: utf-8 -*-\n# Copyright (c) Vispy Development Team. All Rights Reserved.\n# Distributed under the (new) BSD License. See LICENSE.txt for more info.\n\"\"\"\nCameras are responsible for determining which part of a scene is displayed\nin a viewbox and for handling user input to change the view.\n\nSeveral Camera subclasses are available to customize the projection of the \nscene such as 3D perspective and orthographic projections, 2D \nscale/translation, and other specialty cameras. A variety of user interaction\nstyles are available for each camera including arcball, turntable, \nfirst-person, and pan/zoom interactions.\n\nInternally, Cameras work by setting the transform of a SubScene object such \nthat a certain part of the scene is mapped to the bounding rectangle of the \nViewBox.\n\"\"\"\nfrom ._base import make_camera  # noqa\nfrom .base_camera import BaseCamera  # noqa\nfrom .panzoom import PanZoomCamera  # noqa\nfrom .arcball import ArcballCamera  # noqa\nfrom .turntable import TurntableCamera  # noqa\nfrom .fly import FlyCamera  # noqa\nfrom .magnify import MagnifyCamera, Magnify1DCamera  # noqa\n", "path": "vispy/scene/cameras/__init__.py"}]}