- Qt 6.12
- Qt Quick 3D Physics
- Qt Quick 3D Physics Examples and Tutorials
- Qt Quick 3D Physics - Material Example
- Qt Quick 3D Physics | Commercial or GPLv3

# Qt Quick 3D Physics - Material Example

Demonstrates using physical materials.

The Material example demonstrates how to control the material properties of a physical body. The scene contains the usual boilerplate of a View3D, PhysicsWorld, PerspectiveCamera and DirectionalLight. In addition to this the scene contains two physical bodies, namely a slightly tilted plane and a box. Every physical body has a physicsMaterial property containing a PhysicsMaterial node. PhysicsMaterial contains these three material properties; staticFriction, dynamicFriction and restitution and these are used to define how the body will act when colliding with and sliding against other bodies. There is a simple user interface that allows to interactively tweak the material of the box so you can see how it interacts depending on its material properties.

This is the QML code for the material:

     PhysicsMaterial {
         id: physicsMaterial
         staticFriction: staticFrictionSlider.value
         dynamicFriction: dynamicFrictionSlider.value
         restitution: restitutionSlider.value
     }

The material is simply referencing the values of the user interface's sliders. This same material is then used for both the box and the floor:

     DynamicRigidBody {
         id: box
         physicsMaterial: physicsMaterial
         massMode: DynamicRigidBody.CustomDensity
         density: 10
         property vector3d startPosition: Qt.vector3d(700, 300, 0)
         position: startPosition
         Model {
             source: "#Cube"
             materials: PrincipledMaterial {
                 baseColor: "red"
             }
         }
         collisionShapes: BoxShape {}
     }
     StaticRigidBody {
         eulerRotation: Qt.vector3d(-79, -90, 0)
         scale: Qt.vector3d(20, 30, 100)
         physicsMaterial: physicsMaterial
         collisionShapes: PlaneShape {}
         Model {
             source: "#Rectangle"
             materials: PrincipledMaterial {
                 baseColor: "green"
             }
             castsShadows: false
             receivesShadows: true
         }
     }

Files:

- material/CMakeLists.txt
- material/main.cpp
- material/main.qml
- material/material.pro
- material/qml.qrc