PhysicsWorld QML Type
Controls the physics simulation. More...
|Import Statement:||import QtQuick3D.Physics|
- defaultDensity : float
- enableCCD : bool
- forceDebugDraw : bool
- gravity : vector3d
- maximumTimestep : float
- minimumTimestep : float
- running : bool
- scene : Node
- typicalLength : float
- typicalSpeed : float
- viewport : Node
- frameDone(float timestep)
The PhysicsWorld type controls the physics simulation. This node is used to create an instance of the physics world as well as define its properties. There can only be one physics world. All collision nodes in the qml will get added automatically to the physics world.
defaultDensity : float
This property defines the default density of dynamic objects, measured in kilograms per cubic unit. This is equal to the weight of a cube with side
The default value is
0.001, corresponding to 1 g/cm³: the density of water. If your unit of measurement is meters, a good value would be
1000. Note that only positive values are allowed.
enableCCD : bool
This property enables continuous collision detection. This will reduce the risk of bodies going through other bodies at high velocities (also known as tunnelling). The default value is
forceDebugDraw : bool
This property enables debug drawing of all active shapes in the physics world. The default value is
gravity : vector3d
This property defines the gravity vector of the physics world. The default value is
(0, -981, 0). Set the value to
Qt.vector3d(0, -9.81, 0) if your unit of measurement is meters and you are simulating Earth gravity.
maximumTimestep : float
This property defines the maximum simulation timestep in milliseconds. The default value is
33.333 which corresponds to
30 frames per second.
minimumTimestep : float
This property defines the minimum simulation timestep in milliseconds. The default value is
16.667 which corresponds to
60 frames per second.
running : bool
This property starts or stops the physical simulation. The default value is
scene : Node
typicalLength : float
This property defines the approximate size of objects in the simulation. This is used to estimate certain length-related tolerances. Objects much smaller or much larger than this size may not behave properly. The default value is
typicalSpeed : float
This property defines the typical magnitude of velocities of objects in simulation. This is used to estimate whether a contact should be treated as bouncing or resting based on its impact velocity, and a kinetic energy threshold below which the simulation may put objects to sleep.
For normal physical environments, a good choice is the approximate speed of an object falling under gravity for one second. The default value is
viewport : Node
This signal is emitted when the physical simulation is done simulating a frame. The timestep parameter is how long in milliseconds the timestep was in the simulation.
Note: The corresponding handler is
This signal was introduced in Qt 6.5.
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