Skip to main content

Move a Softbody

In order to move the Softbody by keys, you can attach it to a CharacterBody2D node. This tutorial is also available in the GitHub repo as a sample samples/softbody2d/attach-to-character-controller.

Create a new SoftBody2D node​

Similar as previous tutorial, create a Softbody and add the texture addons/softbody2d/softbody2d.svg to it. You should see in the 2D scene view the following:

scene view

In the Scene tab you can minimise the children of the SoftBody2D node by clicking the arrow button next to the node:

minimise children

Create a World Boundary​

Create a RigidBody2D and add as child a CollisionShape2D with Shape set to WorldBoundaryShape2D and move it below the Softbody:

move below

Create a CharacterBody2D node​

Create a CharacterBody2D node. Add as a child to it a CollisionShape2D node with Shape set to CapsuleShape2D:

capsule shape

Move it to the center of the softbody​

Next, select the CharacterBody2D node in the Scene View:

select character

and move it in the center of the SoftBody2D node (select Move Tool in order to move it):

move to center

note

In case you see in the Softbody node the Shapes, uncheck the Show Shapes option.

Resize it to the size of the softbody​

Next, resize the CollisionShape2D of the CharacterBody2D node to have about the same size as the SoftBody2D node:

resize shape

In my case I used Radius 118 and Height 302.

Make the CharacterBody2D not interact with SoftBody2D​

If we would run the scene now, the CharacterBody2D would interact with the SoftBody2D. We don't want this as we want the CharacterBody2D to move the SoftBody2D but not interact with it. We also want the StaticBody2D to interact with both.

Select the StaticBody2D and go to:

  • Collision/Layer: Set it to both Layer 1 and Layer 2
  • Collision/Mask: Set it to both Layer 1 and Layer 2

layers

Select the CharacterBody2D and go to:

  • Collision/Layer: Set it to only Layer 2 (Layer 1 deselected)
  • Collision/Mask: Set it to only Layer 2 (Layer 1 deselected)

Now, the CharacterBody2D will no longer interact with the SoftBody2D.

Make the CharacterBody2D movable​

Select the CharacterBody2D, go to Script, select New Script. For template select CharacterBody2D:: Basic Movement and click Create:

controller

If you run the scene now you should be able to move the CharacterBody2D with arrow keys.

Connect the CharacterBody2D and the SoftBody2D by two joint​

Next, create two PinJoint2D children of the CharacterBody2D:

pin joint

Move the first PinJoint2D to the leftmost middle rigidbody of the softbody:

left rigid

Move the second PinJoint2D to the rightmost middle rigidbody of the softbody:

right rigid

Select the first PinJoint2D created and for Node A put the CharacterBody2D node. For Node B put the Rigidbody of the Softbody that it overlaps with.

note

In order to view the name of that Rigidbody, simply hover your mouse over it and the name will appear:

hover

Also, hiding other nodes that are in the same place helps, like hiding the CharacterBody2D node.

In my case, the Rigidbody was called Bone5. The first PinJoint2D configured should look like this:

configured1

The second PinJoint2D configured should look like this:

configured2

Try it out​

Click the Run Current Scene button. If you did everything right, you will see the following:

gif