Maya - 通过Python在视口中选择对象

Question

谁能帮我？是否可以使用Python制作脚本以自动选择Maya视口中的每个对象？

可能吗？

Answer 1

虽然你必须使用Maya的api才能做到这一点。您可以使用OpenMayaUI.MDrawTraversal来收集相机截头锥体内的所有物体。

这可能看起来比使用OpenMaya.MGlobal.selectFromScreen更长时间，但它给你一些好处：

1. 您可以在任何相机上执行此操作，尽管它不用作活动视图。
2. 您可以执行内存中所需的任何操作，而无需选择并强制重绘。
3. OpenMaya.MGlobal.selectFromScreen将依赖于接口，这意味着无法在Maya批处理作业上执行它。这适用于任何一种情况。

话虽这么说，这是一个例子，它将创建一堆随机框，创建一个相机查看它们，然后选择相机视图内的所有框：

import random

import maya.cmds as cmds
import maya.OpenMaya as OpenMaya
import maya.OpenMayaUI as OpenMayaUI


# Create a new camera.
cam, cam_shape = cmds.camera()
cmds.move(15, 10, 15, cam)
cmds.rotate(-25, 45, 0, cam)
cmds.setAttr("{}.focalLength".format(cam), 70)
cmds.setAttr("{}.displayCameraFrustum".format(cam), True)

# Create a bunch of boxes at random positions.
val = 10
for i in range(50):
    new_cube, _ = cmds.polyCube()
    cmds.move(random.uniform(-val, val), random.uniform(-val, val), random.uniform(-val, val), new_cube)

# Add camera to MDagPath.
mdag_path = OpenMaya.MDagPath()
sel = OpenMaya.MSelectionList()
sel.add(cam)
sel.getDagPath(0, mdag_path)

# Create frustum object with camera.
draw_traversal = OpenMayaUI.MDrawTraversal()
draw_traversal.setFrustum(mdag_path, cmds.getAttr("defaultResolution.width"), cmds.getAttr("defaultResolution.height"))  # Use render's resolution.
draw_traversal.traverse()  # Traverse scene to get all objects in the camera's view.

frustum_objs = []

# Loop through objects within frustum.
for i in range(draw_traversal.numberOfItems()):
    # It will return shapes at first, so we need to fetch its transform.
    shape_dag_path = OpenMaya.MDagPath()
    draw_traversal.itemPath(i, shape_dag_path)
    transform_dag_path = OpenMaya.MDagPath()
    OpenMaya.MDagPath.getAPathTo(shape_dag_path.transform(), transform_dag_path)

    # Get object's long name and make sure it's a valid transform.
    obj = transform_dag_path.fullPathName()
    if cmds.objExists(obj):
        frustum_objs.append(obj)


# At this point we have a list of objects that we can filter by type and do whatever we want.
# In this case just select them.
cmds.select(frustum_objs)

希望能给你一个更好的方向。

Answer 2

您可以尝试以下脚本

import maya.OpenMaya as om
import maya.OpenMayaUI as omUI
view = omUI.M3dView.active3dView()
om.MGlobal.selectFromScreen( 0, 0, view.portWidth(), view.portHeight(),om.MGlobal.kReplaceList)

我在https://forums.cgsociety.org/t/list-objects-in-viewport/1463426上找到了这个片段，它似乎可以解决问题。您可以通过讨论阅读更多信息