8 Data Structures
TQ3SpotLightData
data type.
typedef struct TQ3SpotLightData { TQ3LightData lightData; TQ3Boolean castsShadows; TQ3AttenuationType attenuation; TQ3Point3D location; TQ3Vector3D direction; float hotAngle; float outerAngle; TQ3FallOffType fallOff; } TQ3SpotLightData;lightData
A light data structure specifying basic information about the spot light.castsShadows
A Boolean value that indicates whether the spot light casts shadows (kQ3True
) or not (kQ3False
).attenuation
The type of attenuation of the spot light. See "Light Attenuation Values" on page 8-10 for a description of the constants that can be used in this field.location
The location of the spot light, in world coordinates.direction
The direction of the spot light. Note that the direction is defined as a world-space vector away from the light source. This vector does not need to be normalized, but vectors returned by QuickDraw3D in this field might be normalized.hotAngle
The hot angle of the spot light. The hot angle of a spot light is the half-angle, measured in radians, from the center of the cone of light within which the light remains at constant full intensity. The value in this field is a floating-point number in the range 0.0 to ¹/2, inclusive.outerAngle
The outer angle of the spot light. The outer angle of a spot light is the half angle, measured in radians, from the center of the cone of light to the edge of the light's influence. The value in this field is a floating-point number in the range 0.0 to ¹/2, inclusive, and should always be greater than or equal to the value in thehotAngle
field.fallOff
The fall-off value for the spot light. See "Light Fall-Off Values" on page 8-10 for a description of the constants that can be used in this field.
Let us know what you think of these prototype pages.
Generated with Harlequin WebMaker