Fake 3D humanoid physic-based robot

Unity Engine
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1

Hi there, :slight_smile:

I’m trying to do a 3D humanoid body animated by realistics muscles but I want it to interact only in two dimentions like in a 2D platform game.

The Z translation and the Y and X rotation have to be frozen.

For now, I use ArticulationBody, this give me a perfect way to move muscles in precise ways ans lock movements, but I don’t know a good way to froze axis.

Have you an Idea ?

Thanks a lot !

2

So what’s the question about 2D-Physics? I only ask because you’ve tagged it 2D-Physics despite this looking like a question about 3D-physics.This puts your question in the 2D product area.

The question just seems to be asking about how to lock constraints on a 3D Rigidbody. Those are right there in the inspector and in the manual/scripting reference.

I’ll remove the tag for you if it’s nothing to do with 2D-physics.

Thanks.

3

Hello @MelvMay

I’ve tagged 2D Physics beacause if there is a way to do an “ArticulatioBody like” component in 2D, i’m interested to know how I can do that.

However, if it’s deplaced I can remove the tag.

I Know RigidBody provide constraint to freeze axis positions/rotation and that’s exactly what I want to do but with ArticulatioBody component because, i guess, ArticulationBody are the best way to make joins with precise DoF, movements, torque and angles targeting for simulate human movements.

Thanks for your anwer,

4

I think what you want is a revolute joint.

I base this 100% on reading the docs because I have never touched an ArticulationBody.

5

Hello @Kurt-Dekker

Revolut joint allows rotational movement around the X axis but do not provide a way to apply torque on the articulation.

However Articulation body have a robotic movement simulator engine.

Maybe I have to create it for 2D movement but I don’t want to reinvent the wheel.

I’ve try with configurableJoint but they are less precise and realist than ArticulationBody.

Maybe I have to create a new component based on the ArticulationBody but for 2D physics.

Thanks for your help.

6

So you seem to be asking about 3D-physics here as ArticulationBody is 3D-Physics so you should tag it for that and not 2D-Physics. The 2D-Physics isn’t a tag to be used when you’re simply doing 2D movement, it’s for when you’re actually using 2D-Physics. Adding the tag just causes confusion. :slight_smile:

If you want to ask about 3D-Physics and it’s features then please use the tag “physics” which puts your question in the “Physics Product Area”.

I’ll go ahead and change the tags for you.

Thanks.