RigidBody3D

Learn physics-based motion with RigidBody3D.

Physics Simulation with RigidBody3D

In Godot 3D, the RigidBody3D node is used for objects governed by physics rules like gravity, mass, and collisions. Its movement is computed by the physics engine rather than direct script transforms. To detect collisions, it must have a CollisionShape3D child node.

RigidBody3D body = new RigidBody3D();
body.Mass = 5.0f;

Mass and Central Impulse

The Mass property of the RigidBody3D node determines the object's mass in kilograms. To toss or shove an object physically, force is applied via the ApplyCentralImpulse() method instead of mutating coordinates directly.

// Pushes object with an instantaneous physical impulse:
// body.ApplyCentralImpulse(new Vector3(0, 10, 0));

Exercise Configure Physics Mass

Assign 5.0f to body.Mass and print it with GD.Print("Kutle: " + body.Mass);.

Show example solution

using System;

public class RigidBody3D
{
    public float Mass { get; set; } = 1.0f;
    public bool Freeze { get; set; } = false;
}

public static class GD
{
    public static void Print(object message) => Console.WriteLine(message);
}

public class Program
{
    public static void Main()
    {
        RigidBody3D body = new RigidBody3D();
        body.Mass = 5.0f;
        GD.Print("Kutle: " + body.Mass);
    }
}

Test yourself

Which child node is required for a RigidBody3D node to physically collide with other objects in Godot 3D?
- CollisionShape3D
- Camera3D
- DirectionalLight3D
- MeshInstance3D
Show answer

CollisionShape3D — A CollisionShape3D node is required for the physics engine to calculate the object's collision boundaries.
Assign Mass Value
```
body.____ = 10.0f;
```
Show answer
```
body.Mass = 10.0f;
```
Godot Physics Terminology

RigidBody3D

Dynamic 3D node moving with physics
CollisionShape3D

Node defining collision geometry
Mass

Physical mass value of the object
ApplyCentralImpulse

Applies impulse to object center

Next lesson: Summary - Godot 3D

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