select a point on a poly surface and have it return the coords?

[e955...@gmail.com]

Hey guys,

im trying to write some python code to be able to click a random point on a poly surface and then have it create a locator at that coordinate x,y,z.

is this possible ? - at the moment i have to create a locator and then make the surface live and drag the locator into the chosen position.

any advice would be great,

thanks,
Sam

[Mahmoodreza Aarabi]

Hey.

i think for controling click on an object in maya you should write plugin.

but in maya env, you can use a helper(like locator) to put it on your point and then get its position with xform command.

and you can use geometryConstraint for sticking to poly, pointOnSurface node or other ways.

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Bests,

madoodia

[e955...@gmail.com]

i guess plugins are c++ right. way over my head, but ill look into it.
thanks,

Sam

[Mahmoodreza Aarabi]

You can write plugin with Maya Python API too.

but i think you get good result with maya commands too with mel and python script.

thanks,

Sam

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Bests,

madoodia

[Ricardo Viana]

This might help.

I've commented so you can follow.

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[Ricardo Viana]

import maya.cmds as cmds

#list selected vertices, only works if you dont lasso select them.

selVerts = cmds.ls(sl=True)

#create empty list to store positions
selPositions = []


#loop to look up every vertex position and store it in selPositions
for vertex in selVerts:
    #query the position
    pos = cmds.xform(vertex, query = True , t = True)
    #append to list
    selPositions.append(pos)


# loop to create locators
for position in selPositions:
    #create a locator
    locator = cmds.spaceLocator()
    #move it into the position
    cmds.xform(locator, t= position)

[Marcus Ottosson]

Hi Sam,

This is certainly possible, if by "point" you mean vertex, you can:

1a. Get all components

2a. Pick one at random

3a. Emit from object, using the component

It will create 2 nodes, one of which is an emitter that follows the component in worldspace.

If by "point" you mean arbitrary location on a mesh, including inbetween vertices, you can:

1b. Create follicle on surface

2b. Insert a random value between 0-1

If you don't have any UVs, you can

1c. Duplicate the mesh

2c. Project planar

3c. Repeat 1b and 2b.

4c. Delete duplicate

Best,

Marcus

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Marcus Ottosson
konstr...@gmail.com