3D Graphics Programming with QuickDraw 3D 1.5.4

Directional Lights

Labels

ASCII: DirectionalLight
Binary: drct ( = 0x64726374 )

Data Format



 
Vector3D            direction

Boolean             castsShadows

direction: The direction of the directional light. This vector should be normalized.
castsShadows: A value of True indicates that the light casts shadows; a value of False indicates that the light does not cast shadows.

Data Size

Description

A directional light is a light that emits parallel rays in a specific direction. A directional light may be set to cast shadows.

Some style objects also specify whether or not objects in a scene shall receive shadows. However, objects in the scope of a receive shadows style set to False do not receive shadows, regardless of whether they are also appropriately situated to receive shadows from a light set to cast shadows.

Parent Hierarchy

Shared, shape, light.

Parent Objects

None.

Child Objects

Light data (optional). If no child object is specified, the light should have the properties specified in the default setting of a light data object.

Example



 
Container (

    DirectionalLight ( 1 0 0 True )

    LightData ( ... )

)