Edge length

[Zerflag]

been ages since i've done aything in maya, so there is probably a better way, but... get the vertices that belong to the edge, get their global coordinates, compute vector between the two. there's your length.

[cppgraphics]

been ages since i've done aything in maya, so there is probably a better way, but... get the vertices that belong to the edge, get their global coordinates, compute vector between the two. there's your length.

Thanks dude let me try it.

[kyleh]

Here's some python code that will return the length of a selected edge:


import maya.cmds as cmds
import math
sel=cmds.ls(sl=True,fl=True)
cmds.ConvertSelectionToVertices()
p=cmds.xform(sel,q=True,t=True,ws=True)
length=math.sqrt(math.pow(p[0]-p[3],2)+math.pow(p[1]-p[4],2)+math.pow(p[2]-p[5],2))
cmds.select(sel)
print 'Edge Length=',length

[cppgraphics]

Here's some python code that will return the length of a selected edge:


import maya.cmds as cmds
import math
sel=cmds.ls(sl=True,fl=True)
cmds.ConvertSelectionToVertices()
p=cmds.xform(sel,q=True,t=True,ws=True)
length=math.sqrt(math.pow(p[0]-p[3],2)+math.pow(p[1]-p[4],2)+math.pow(p[2]-p[5],2))
cmds.select(sel)
print 'Edge Length=',length


Thank you kyleh :cool:.

Its working exactly fine and can you please explain what the xform will return. In the document they gave like xform returns depends on flag you selected.

[kyleh]

In this script I convert the selected edge into verts. xform then returns the world space location of the selected verts in this form (v0x, v0y, v0z, v1x, v1y, v1z). From there I just calculate the length between the two verts.

[cppgraphics]

In this script I convert the selected edge into verts. xform then returns the world space location of the selected verts in this form (v0x, v0y, v0z, v1x, v1y, v1z). From there I just calculate the length between the two verts.

kyleh,

Where is the definition of this funtion(cmds.ConvertSelectionToVertices())? It is not available in the Docs.

Is this any internal function used in Maya?

[kyleh]

ConvertSelectionToVertices() is an undocumented command that converts the current component selection to vertices. I try not to us many undocumented commands since they may change in the future, but sometimes they're just too convenient :)

[cppgraphics]

ConvertSelectionToVertices() is an undocumented command that converts the current component selection to vertices. I try not to us many undocumented commands since they may change in the future, but sometimes they're just too convenient :)

Thanks Kyleh, please let me know where did you find all these undocumented commands?

[Blot12345]

You may be able to use the arclen node in maya. It'll give you the length of a curve in maya, and it'll update when the curve changes.

Here is a link: http://download.autodesk.com/us/maya/2009help/Commands/arclen.html

I hope this helps.

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