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如何收集 Maya 场景中的所有摄像机，不包括默认的“透视、顶部、正面、侧面”摄像机？

我只想收集用户创建的相机。

cameras = cmds.ls(type=('camera'), l=True) or []
print cameras

我需要listRelatives出于任何原因吗？我最终只想打印每个相机的世界矩阵。

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5 回答 5

3

要清除默认摄像头，您可以查询是否startupCamera使用cmds.camera. 这是一些代码（带注释）来解释。

派梅尔版

# Let's use Pymel for fun
import pymel.core as pm

# Get all cameras first
cameras = pm.ls(type=('camera'), l=True)

# Let's filter all startup / default cameras
startup_cameras = [camera for camera in cameras if pm.camera(camera.parent(0), startupCamera=True, q=True)]

# non-default cameras are easy to find now. Please note that these are all PyNodes
non_startup_cameras_pynodes = list(set(cameras) - set(startup_cameras))

# Let's get their respective transform names, just in-case
non_startup_cameras_transform_pynodes = map(lambda x: x.parent(0), non_startup_cameras_pynodes)

# Now we can have a non-PyNode, regular string names list of them
non_startup_cameras = map(str, non_startup_cameras_pynodes)
non_startup_cameras_transforms = map(str, non_startup_cameras_transform_pynodes)

cmds版本

import maya.cmds as cmds

# Get all cameras first
cameras = cmds.ls(type=('camera'), l=True)

# Let's filter all startup / default cameras
startup_cameras = [camera for camera in cameras if cmds.camera(cmds.listRelatives(camera, parent=True)[0], startupCamera=True, q=True)]

# non-default cameras are easy to find now.
non_startup_cameras = list(set(cameras) - set(startup_cameras))

# Let's get their respective transform names, just in-case
non_startup_cameras_transforms = map(lambda x: cmds.listRelatives(x, parent=True)[0], non_startup_cameras)

进一步阅读：http ://ewertb.soundlinker.com/mel/mel.082.php

于 2016-11-30T07:12:11.103 回答
1

如果有人偶然发现这一点，这里有一些简单的方法，涵盖了一些额外的用例：

  • 包括组内的摄像机/嵌套摄像机。
  • 无论选择是形状还是变换都有效
  • 可选的 kwarg 用于返回变换而不是形状。
import maya.cmds as cmds

def all_user_cameras(return_transforms=False):
    # Get all user created / non-startup cameras in the scene
    all_user_cameras = [c for c in cmds.ls(type='camera') if not cmds.camera(c, q=True, sc=True)]
    if return_transforms:
        return [cmds.listRelatives(c, p=True)[0] for c in all_user_cameras]
    return all_user_cameras

def all_selected_user_cameras(check_nested=True, return_transforms=False):
    # Get the user created / non-startup cameras from the selection, check_nested looks inside groups when set to True
    selected_cameras = cmds.ls(sl=True, type='camera')
    selected_camera_from_shapes = cmds.listRelatives(cmds.ls(sl=True), ad=check_nested, c=True, type='camera')
    if selected_camera_from_shapes:
        selected_cameras.extend(selected_camera_from_shapes)
    if return_transforms:
        return [cmds.listRelatives(c, p=True)[0] for c in selected_cameras]
    return selected_cameras
于 2019-04-17T02:17:00.497 回答
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您可能需要依赖listCamera命令，您只能列出 persp 相机或其他。例如：

perspCameras = cmds.listCameras( p=True )

于 2016-11-29T22:42:57.017 回答
0 
cameras = cmds.ls(type='camera') or []
exclude = ['persp', 'top', 'front', 'side']

cameras = list(set(cameras)-set(exclude))
于 2016-11-29T23:44:46.787 回答
0

遍历场景中的所有摄像机并在那里打印变换 ws 矩阵：

for cam in cmds.listRelatives(cmds.ls(type="camera"), p=True):
    if cmds.objectType(cam, isType='transform'): # True
       print cam, cmds.xform(cam, q=True, ws=True, matrix=True)

front [1.0, 0.0, 0.0, 0.0....
persp [0.707106781186547....
shot_cam [0.9999999999999997, 0.0, .....
side [2.220446049250313e-16, 0.0 .....
top [1.0, 0.0, 0.0, 0.0, 0.0......

让我们在没有相对联系的情况下尝试一下，

for cam in cmds.ls(type="camera"):
    print cmds.objectType(cam, isAType='transform')  # False
    print cam, cmds.xform(cam, q=True, ws=True, matrix=True)

RuntimeError：没有提供给“xform”命令的有效对象

于 2016-12-01T09:06:41.973 回答