lg_light.c File Reference

Functions
LG_Light	lg_light (lg_light_type type, vec3_t pos_or_dir, LG_Color_f color)
void	lg_set_light_src (LG_Light *light, vec3_t pos)
vec3_t	lg_get_light_src (LG_Light *light)
void	lg_move_light_src (LG_Light *light, vec3_t delta)
void	lg_set_light_dir (LG_Light *light, vec3_t dir)
vec3_t	lg_get_light_dir (LG_Light *light)
void	lg_change_light_dir (LG_Light *light, LG_EulerAng angle, const char *rot_order)

Detailed Description

=== It's all about scene lights position, direction, color ===

Use an array of LG_Light structs if you want to have several different lights in a scene

 - Point lighting - vec3_t as a position
 - Directional lighting - vec3_t as an orientation

Function Documentation

lg_light()

LG_Light lg_light	(	lg_light_type	type,
		vec3_t	pos_or_dir,
		LG_Color_f	color
	)

Return a new LG_Light

Parameters

type	Light type (lg_light_type enum), one of POINT, DIRECTIONAL, SPOTLIGHT, AMBIENT, DIFFUSE, EMISSIVE, SPECULAR
pos_or_dir	Source of light (vec3_t) in case of POINT light or light orientation (vec3_t) in case of DIRECTIONAL light
color	Light color

Returns

A new LG_Light

lg_set_light_src()

void lg_set_light_src	(	LG_Light *	light,
		vec3_t	pos
	)

Set light source position

Parameters

light	A LG_Light
pos	Light source pos

lg_get_light_src()

vec3_t lg_get_light_src

(

LG_Light *

light

)

Read light source position

Parameters

light

A LG_Light

Returns

Light source pos

lg_move_light_src()

void lg_move_light_src	(	LG_Light *	light,
		vec3_t	delta
	)

Move light source position by delta

Parameters

light	A LG_Light
delta	Translation vector

lg_set_light_dir()

void lg_set_light_dir	(	LG_Light *	light,
		vec3_t	dir
	)

Set light orientation

Parameters

light	A LG_Light
dir	Light dir

lg_get_light_dir()

vec3_t lg_get_light_dir

(

LG_Light *

light

)

Read light orientation

Parameters

light

A LG_Light

Returns

Light dir

lg_change_light_dir()

void lg_change_light_dir	(	LG_Light *	light,
		LG_EulerAng	angle,
		const char *	rot_order
	)

Change light orientation by rotating by Euler angle

Parameters

light	A LG_Light
rot	Rotation to apply (Euler angle)
rot_order	Rotation order, one of "XYZ", "YXZ", "ZXY", "ZYX", "YZX", "XZY"