- Qt 6.6
- Qt Quick 3D
- QML Types
- DirectionalLight
- Qt Quick 3D | Commercial or GPLv3

# DirectionalLight QML Type

Defines a directional light in the scene. More...

Import Statement: | import QtQuick3D
Inherits: | Light

- List of all members, including inherited members

## Detailed Description

The directional light emits light in one direction from an unidentifiable source located infinitely far away. This is similar to the way sunlight works in real life. A directional light has infinite range and does not diminish.

If castsShadow is enabled, shadows will be parallel to the light direction.

A directional light effectively have no position, so moving it does not have any effect. The light will always be emitted in the direction of the light's Z axis.

Rotating the light along its X or Y axis will change the direction of the light emission.

Scaling a directional light will only have an effect in the following cases:

- If Z scale is set to a negative number, the light will be emitted in the opposite direction.
- If the scale of any axis is set to 0, the light will be emitted along the world's Z axis.

  Note: Rotating the light will then have no effect.

Let's look at a simple example:

     import QtQuick
     import QtQuick3D
     View3D {
         anchors.fill: parent

         PerspectiveCamera { z: 600 }

         DirectionalLight {
         }

         Model {
             source: "#Sphere"
             scale: Qt.vector3d(4, 4, 4)
             materials: PrincipledMaterial {
                 baseColor: "#40c060"
                 roughness: 0.1 // make specular highlight visible
             }
         }
     }

Here the DirectionalLight uses the default `white` color, emitting in the direction of the DirectionalLight node's Z axis.

Rotating 60 degrees around the X axis would lead to the following. Instead of emitting straight in the direction of the Z axis, the light is now pointing 60 degrees "down":

     DirectionalLight {
         eulerRotation.x: 30
     }

For further usage examples, see Qt Quick 3D - Lights Example.

See also PointLight and SpotLight.