Set location of vertices, accessing object's data

Coding Python Support
1

Hello,
I’m absolutely new beginner, and I’d like to ask some general questions.

  1. Is there a way to access object’s data like position of it’s vertices? (I see bpy.data.objects[‘something’], but don’t know what to do next).

  2. I’d like to know whether there is an operator to set position of object’s vertices (not move, but set).

I know these are noob questions, but I can’t find any relelvant info on wiki…

Thanks for your time and patience,

Skyer

2

Setting and moving vertices is the same exact thing. If you set a location for a vertex you have moved it if the new location is different from the previous location.


import bpy

ob = bpy.data.objects["Cube"]
me = ob.data
print("faces:")
for face in me.faces:
    print(face)

print("
verts:")
for vert in me.vertices:
    new_location = vert.co
    new_location[0] = new_location[0] + 1   #X
    new_location[1] = new_location[1] + 1   #Y
    new_location[2] = new_location[2] + 1   #Z
    vert.co = new_location

NOTE: vert.co stands for the vertex coordinate.

3

Comments related to Atoms nice answer:

If you have (x,y,z) the ‘new’ coordinates of your vertex already computed/available
you can use at once: vert.co = (x,y,z)
(or if “from mathutils import Vector” is done)
I would write Atoms example as
vect.co = vect.co + Vector((1,1,1))
:wink:

4

Thank you both, exactly what I wanted to know.

By the way, this Python integration makes Blender extremely usable, I’m planning to create a module to calculate triangle’s sides and angles :).

Skyer

5

angles and lengths are already ‘built in’ use in 3DView and type N (such that the right options are visible) and under Display in edit-mode you can see angles and length …(select works too!)

Though I do not know yet to get the measurements to Python …

6

Huh,
which version of Blender are you using? I can’t find anyting like it. The display section of “N panel” doesn’t seem to contain any information about angles or lenghts. I attached a screen to see what am I missing…

//edit: the whole thing shouldn’t be hard to do in Python, we know coordinates of all points, so we can easily get the rest.

Skyer

Attachments

Screenshot at 2012-01-30 16:41:25.png1680×1050 209 KB

7

moment …

Just compile 2.61 :wink:

this is while dragging the vertices, if finished, less is shown (only used selection used)!

8

You may need to run this little script first. Then open up Mesh Display.


import bpy
bpy.app.debug = True

Setting debug = True gets you some extra numerics.

9

Alright,
I am already using Blender 2.61, but turning on debugging fixed it. Great. (Looks like I won’t even have to, actually, do any work after all :D).

Thanks for your help,

Skyer