Why is object's location is same, ( vector (0,0,0) ) in all frames of animation?

Asked Mar 15 '17 at 11:50

Active Mar 15 '17 at 12:00

Viewed 84 times

I have imported a human model mesh, with armature and animated it with mocap. What I exactly need is the position of its eyes at different frames.

              for f in frame_numbers:

                    eye_ob = bpy.data.objects[model+':Low-poly'] #eyes 
                    ob = bpy.data.objects[model]
                    REyeIdx=95 
                    LEyeIdx=47
                    scene.objects.active = eye_ob
                    scene.frame_set( f )
                    scene.update()                              
                    verts= eye_ob.data.vertices
                    print("right eyes ",verts[REyeIdx].co) #--this prints same value in all frames 
                    print("left eyes ", verts[LEyeIdx].co) #--this prints same value in all frames 
                    print("model pos" , ob.matrix_world.translation) #--this prints vector((0.0, 0.0, 0.0))
                    print("eye pos" ,  eye_ob.matrix_world.translation) #--this prints vector((0.0, 0.0, 0.0))

I am getting same 0,0,0 vector for object and its eye's positions. The coordinates of a specific vertex of eyes remains the same throughout the animation( not 0 vector). What could be the reason? How can I fix it? I saw related questions, but did not help.

edited Mar 15 '17 at 12:00

asked Mar 15 '17 at 11:50

p.Neu

You need to look at the pose bone locations. – batFINGER Mar 15 '17 at 12:41
Yes, pose bone works. but i need eye's location in specific, also ears and nose! – p.Neu Mar 15 '17 at 12:48
Add an empty with a vertex parent. The matrix_world.to_translation() "should" work on empty. – batFINGER Mar 15 '17 at 12:52
Sorry, I didn't get you. What should be empty? I am new to blender scripting – p.Neu Mar 15 '17 at 12:58
Add Object Empty and Parent to vertex – batFINGER Mar 15 '17 at 13:05
Thanks, but would you mind writing few lines of code for this? – p.Neu Mar 15 '17 at 14:08
Is there any other way to do this? – p.Neu Mar 15 '17 at 15:02
See http://blender.stackexchange.com/questions/3462/vertex-coordinate-after-pose-change – lemon Mar 16 '17 at 06:01
@lemon thank you so much. I had tried different things, only this worked. :D Thanks again! – p.Neu Mar 16 '17 at 09:06

Why is object's location is same, ( vector (0,0,0) ) in all frames of animation?

0 Answers0