Entities

entities/light

#include "dxfio/entities/light.hpp"

In DxfIO::Entities

struct Lamp

The AcDbLight subclass of a LIGHT: its kind, color and place, and how it falls off and casts shadows.

Field	Type and default	Meaning
`Version`	`int{1}`	The version of the light's layout. Group 90.
`Name`	`std::string`	The name of the light. Group 1.
`Kind`	`int{2}`	1 distant, 2 point, 3 spot. Group 70.
`Lit`	`bool{true}`	Whether the light is on. Group 290.
`Color`	`int{7}`	The AutoCAD Color Index of the light. Group 63, from R2004.
`Rgb`	`int{Lamplight}`	The true color of the light, as 0xRRGGBB. Group 421 from R2004; up to R2000, packed in a group 90.
`Glyph`	`bool`	Whether the light's glyph is plotted. Group 291.
`Intensity`	`double{1}`	How bright the light is. Group 40.
`Position`	`Vector`	The position, in world coordinates. Groups 10, 20, 30.
`Target`	`Vector`	The point a spot or distant light aims at, in world coordinates. Groups 11, 21, 31.
`Fading`	`int`	How the light weakens with distance: 0 not at all, 1 inverse linear, 2 inverse square. Group 72.
`Limited`	`bool`	Whether the light reaches only from its start distance to its end distance. Group 292.
`Start`	`double{1}`	The distance the light starts to reach from, when it is limited. Group 41.
`End`	`double{10}`	The distance the light stops reaching at, when it is limited. Group 42.
`Hotspot`	`double{45}`	The angle of a spot light's bright inner cone, in degrees. Group 50.
`Falloff`	`double{50}`	The angle of a spot light's whole cone, in degrees. Group 51.
`Casting`	`bool{true}`	Whether the light casts shadows. Group 293.
`Shading`	`int`	The kind of shadow: 0 ray traced, 1 shadow map. Group 73.
`Size`	`int{256}`	The size of the shadow map. Group 91.
`Softness`	`int{1}`	The softness of the shadow map's edges. Group 280.

struct LightLIGHT

A LIGHT: a point, spot or distant light of the scene.

Field	Type	Meaning
`Record`	`Entities::Record`	The layer, linetype, color and the rest every entity carries.
`Picture`	`std::string`	The proxy graphics, for programs that cannot draw the entity. Group 92, or 160 from R2010, then 310.
`Lamp`	`Boxed<Entities::Lamp>`	The kind, color and place of the light, from the AcDbLight subclass.

Constants

Lamplight int = 0xFFFFFF The true color a new light takes: white, as 0xRRGGBB. Not a color index: Colors::White is that.