Maya

Question

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

可能吗？

Answer 1

你可以试试下面的脚本

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。您可以阅读讨论以获取更多信息

Answer 2

尽管您必须使用 Maya 的 api 才能做到这一点，但这是很有可能的。您可以使用 OpenMayaUI.MDrawTraversal 收集相机平截头体内的所有对象。

这似乎比使用 OpenMaya.MGlobal.selectFromScreen 更冗长，但它给您带来了一些好处：

您可以在任何相机上执行此操作，尽管它未用作活动视图。
您可以在内存中执行任何需要做的事情，而无需 selecting 和强制重绘。
OpenMaya.MGlobal.selectFromScreen 将依赖于接口，这意味着它不可能在 Maya 批处理作业上执行。这将适用于任何一种情况。

也就是说，这是一个示例，它会创建一堆随机框，创建一个注视它们的相机，然后 select 相机视野内的所有框：

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。

Maya – Select 视口中的对象通过 Python

Maya – Select objects in viewport via Python

python

viewport