Find component selection center

[Matteo Di Lena]

Hi guys,

I'm having troubles trying to find the center of a component selection (vertex, in this case) with
python. I tried looking into commands reference, but I could't find anything useful.

Is this possible with maya cmds or do I need some API?

Thanks a lot for any help.
-Matteo

[Mahmoodreza Aarabi]

Hey
if your mean is find world position of some selected component (vertex here)
you should use an script like this:

import maya.cmds as cmds

selVerts = cmds.ls(sl=True)
clst = cmds.cluster()
pos = cmds.xform(clst[1], q=True, ws=True, rp=True)
loc = cmds.spaceLocator()
cmds.move(pos[0], pos[1], pos[2])
cmds.delete(clst[1])

Now you have a locator that show you center of your selection.you can use pos variable for finding the location of center.

Good luck

​

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Bests,

madoodia

[Matteo Di Lena]

Thanks a lot Mahmoodreza,
clever way to solve it :) I found a way, after quite a few time spent searching, to query a manipulator position and get its world space values.
Anyway your solution is way more intuitive than that!

Thank you again.
-Matteo

On Tuesday, September 16, 2014 6:25:38 PM UTC+2, Mahmoodreza Aarabi wrote:

Hey
if your mean is find world position of some selected component (vertex here)
you should use an script like this:

import maya.cmds as cmds

selVerts = cmds.ls(sl=True)
clst = cmds.cluster()
pos = cmds.xform(clst[1], q=True, ws=True, rp=True)
loc = cmds.spaceLocator()
cmds.move(pos[0], pos[1], pos[2])
cmds.delete(clst[1])

Now you have a locator that show you center of your selection.you can use pos variable for finding the location of center.

Good luck

​

On Tue, Sep 16, 2014 at 7:35 PM, Matteo Di Lena <dilena...@gmail.com> wrote:

Hi guys,

I'm having troubles trying to find the center of a component selection (vertex, in this case) with
python. I tried looking into commands reference, but I could't find anything useful.

Is this possible with maya cmds or do I need some API?

Thanks a lot for any help.
-Matteo

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Bests,

madoodia

[iouzzr]

Try this:

import maya.cmds as cmds

def get_poly_bounding_box_center(object):

    # object can be object or components

    bbox = cmds.xform(object, query=True, boundingBox=True, worldSpace=True)

    # bbox = cmds.exactWorldBoundingBox(object)

    center_x = (bbox[0] + bbox[3]) / 2.0

    center_y = (bbox[1] + bbox[4]) / 2.0

    center_z = (bbox[2] + bbox[5]) / 2.0

    return [center_x, center_y, center_z]

def show_bounding_box_center():

    """

    Adds a locator at bounding box center.

    """

    selection = cmds.ls(selection=True, flatten=True)

    if not selection:

        cmds.warning("No objects or components selected.")

        return

    poly_objects = []

    poly_components = []

    for item in selection:

        if ".vtx[" in item or ".e[" in item or ".f[" in item:

            poly_components.append(item)

        elif cmds.ls(item, type="transform"):

            poly_objects.append(item)

    if poly_objects:

        for obj in poly_objects:

            center = get_poly_bounding_box_center(obj)

            locator = cmds.spaceLocator(name=f"{obj}BoundingBoxCenter")[0]

            cmds.xform(locator, translation=center, worldSpace=True)

    if poly_components:

        center = get_poly_bounding_box_center(poly_components)

        locator = cmds.spaceLocator(name="ComponentsBoundingBoxCenter")[0]

        cmds.xform(locator, translation=center, worldSpace=True)