0
$\begingroup$

I am working on a scientific visualization.

Scene is like there is a sphere and I want to mark down the path that it passes through.

Sphere follows a completely unknown path, so I can't draw it manually. Glad to get help!!!

$\endgroup$
  • $\begingroup$ Add a . blend file or a screenshot. $\endgroup$ – Lukasz-40sth Dec 10 '19 at 12:29
0
$\begingroup$

enter link description here

Motion Paths

From the blender user manual

Editor: 3D View, Properties editor Mode: Object Mode Panel: Properties editor ‣ Object ‣ Motion Paths

The Motion Paths tool allows you to visualize the motion of points as paths over a series of frames. These points can be object origins and bone joints. Motion Paths

To create or remove motion paths, it is necessary to first select the bones. Then:

  • To show the paths (or update them, if needed), click on the Calculate Path button.
  • To hide the paths, click on the Clear Paths button.

enter image description here

These are display only, to get them as actual object you'd need to convert them using a script, there's one in this blender artists thread

Unfortunately this won't work in blender 2.81, but with a slight modification it does, here's the updated version:

## path from -calculated- motion path

import bpy
ob = bpy.context.object
mp = ob.motion_path

if mp:
    path = bpy.data.curves.new('path','CURVE')
    curve = bpy.data.objects.new('Curve',path)
    bpy.context.scene.collection.objects.link(curve)
    path.dimensions = '3D'
    spline = path.splines.new('BEZIER')
    spline.bezier_points.add(len(mp.points)-1)

    for i,o in enumerate(spline.bezier_points):
        o.co = mp.points[i].co
        o.handle_right_type = 'AUTO'
        o.handle_left_type = 'AUTO'
$\endgroup$
  • $\begingroup$ Thanks for your help, this is really very helpful. $\endgroup$ – user85218 Dec 10 '19 at 13:41
  • $\begingroup$ You're welcome, feel free to upvote and mark the solution as accepted. $\endgroup$ – Moog Dec 10 '19 at 13:42

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.