Defines a point light object and its behavior.

A point light source is similar to a single light bulb whose light radiates out in all directions from a single point.
 
 

HT_Filter, HT_Light, HT_Spot_Light, HT_Distant_Light, HT_Ambient_Light, chapter 8, "Lighting and Material Functions"

position, set_position

Queries or sets the position of the light.

HT_Point_Light

Purpose

Constructs an HT_Point_Light object.

HT_Point_Light::HT_Point_Light (HT_Point const & pos)

Class HT_Lighting_Info returns the result of illumination information, basically color and direction for point lights. illuminate determines how much light is contributed to that part of the object that is illuminated, whereas position is the coordinate point of the illuminated object.

HT_Lighting_Info HT_Point_Light_Data::illuminate (
    stack       HT_Rendition const *    hr,
    stack       HT_Vector const *       normal,
    stack       HT_Point const *        position,
    stack       HT_Parameter const *    parameter) const

Purpose

Queries or sets the position of the light.

HT_Point position () const

void set_position (HT_Point const & pos, HT_Boolean shared = HK_False)

.

Purpose

Returns the shadow type.

HT_Shadow_Type shadow_type () const

.

Purpose

Returns true if the use limit is activated.

HT_Boolean use_limits () const

.

Purpose

Returns the start limit.

float start_limit () const

.

Purpose

Returns the end limit.

float end_limit () const

.