Inside Macintosh: 3D Graphics Programming With QuickDraw 3D /

Chapter 8 - Light Objects / Light Objects Reference

Data Structures

Point Light Data Structure

You use a point light data structure to get or set information about a point light source. A point light data structure is defined by the TQ3PointLightData data type.

typedef struct TQ3PointLightData {
   TQ3LightData               lightData;
   TQ3Boolean                 castsShadows;
   TQ3AttenuationType         attenuation;
   TQ3Point3D                 location;
} TQ3PointLightData;

Field Description

lightData

A light data structure specifying basic information about the point light.

castsShadows

A Boolean value that indicates whether the point light casts shadows (kQ3True) or not (kQ3False).

attenuation

The type of attenuation of the point light. See "Light Attenuation Values" on page 8-9 for a description of the constants this field can contain.

location

The location of the point light, in world coordinates.