light.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include "tachyon.h"
#include "macros.h"
#include "vector.h"
#include "intersect.h"
#include "util.h"
#include "light.h"

Go to the source code of this file.

Macros
#define	TACHYON_INTERNAL   1
#define	LIGHT_PRIVATE

Functions
void	free_light_special (void *voidlight)
directional_light *	newdirectionallight (void *tex, vector dir)
point_light *	newpointlight (void *tex, vector ctr, flt rad)
point_light *	newspotlight (void *tex, vector ctr, flt rad, vector dir, flt fallstart, flt fallend)
void	light_set_attenuation (point_light *li, flt Kc, flt Kl, flt Kq)
static flt	directional_light_shade_diffuse (directional_light *li, shadedata *shadevars)
static flt	simple_point_light_shade_diffuse (point_light *li, shadedata *shadevars)
static flt	point_light_shade_diffuse (point_light *li, shadedata *shadevars)
static flt	light_no_attenuation (void *vli, flt Llen)
static flt	light_complex_attenuation (void *vli, flt Llen)
static flt	light_no_falloff (void *vli, vector *L)
static flt	light_spotlight_falloff (void *vli, vector *L)
static int	light_bbox (void *obj, vector *min, vector *max)
static void	light_intersect (const point_light *l, ray *ry)
static void	light_normal (const point_light *l, const vector *pnt, const ray *incident, vector *N)

Variables
static object_methods	light_methods

Macro Definition Documentation

LIGHT_PRIVATE

#define LIGHT_PRIVATE

Definition at line 23 of file light.c.

TACHYON_INTERNAL

#define TACHYON_INTERNAL   1

Definition at line 16 of file light.c.

Function Documentation

directional_light_shade_diffuse()

static flt directional_light_shade_diffuse ( directional_light *  li, shadedata *  shadevars  )

static

Definition at line 148 of file light.c.

References directional_light_t::dir, and VDOT.

Referenced by free_light_special(), and newdirectionallight().

free_light_special()

void free_light_special

(

void *

voidlight

)

Definition at line 35 of file light.c.

References directional_light_shade_diffuse(), and light_t::shade_diffuse.

Referenced by rt_deletescene().

light_bbox()

static int light_bbox ( void *  obj, vector *  min, vector *  max  )

static

Definition at line 243 of file light.c.

light_complex_attenuation()

static flt light_complex_attenuation ( void *  vli, flt  Llen  )

static

Definition at line 210 of file light.c.

References point_light_t::Kc, point_light_t::Kl, and point_light_t::Kq.

Referenced by light_set_attenuation().

light_intersect()

static void light_intersect ( const point_light *  l, ray *  ry  )

static

Definition at line 248 of file light.c.

References point_light_t::ctr, point_light_t::rad, SQRT, VDOT, and VSUB.

light_no_attenuation()

static flt light_no_attenuation ( void *  vli, flt  Llen  )

static

Definition at line 206 of file light.c.

Referenced by newpointlight(), and newspotlight().

light_no_falloff()

static flt light_no_falloff ( void *  vli, vector *  L  )

static

Definition at line 219 of file light.c.

Referenced by newpointlight().

light_normal()

static void light_normal ( const point_light *  l, const vector *  pnt, const ray *  incident, vector *  N  )

static

Definition at line 275 of file light.c.

References point_light_t::ctr, SQRT, and VDot().

light_set_attenuation()

void light_set_attenuation	(	point_light *	li,
		flt	Kc,
		flt	Kl,
		flt	Kq
	)

Definition at line 129 of file light.c.

References point_light_t::attenuationfunc, point_light_t::Kc, point_light_t::Kl, point_light_t::Kq, light_complex_attenuation(), point_light_shade_diffuse(), and point_light_t::shade_diffuse.

Referenced by rt_light_attenuation().

light_spotlight_falloff()

static flt light_spotlight_falloff ( void *  vli, vector *  L  )

static

Definition at line 224 of file light.c.

References ACOS, point_light_t::fallend, point_light_t::fallstart, point_light_t::spotdir, and VDOT.

Referenced by newspotlight().

newdirectionallight()

directional_light* newdirectionallight	(	void *	tex,
		vector	dir
	)

Definition at line 42 of file light.c.

References directional_light_t::dir, directional_light_shade_diffuse(), light_methods, and directional_light_t::shade_diffuse.

Referenced by rt_directional_light().

newpointlight()

point_light* newpointlight	(	void *	tex,
		vector	ctr,
		flt	rad
	)

Definition at line 63 of file light.c.

References point_light_t::attenuationfunc, point_light_t::ctr, point_light_t::fallend, point_light_t::fallstart, point_light_t::Kc, point_light_t::Kl, point_light_t::Kq, light_methods, light_no_attenuation(), light_no_falloff(), point_light_t::rad, point_light_t::shade_diffuse, simple_point_light_shade_diffuse(), point_light_t::spotdir, and point_light_t::spotfunc.

Referenced by rt_light().

newspotlight()

point_light * newspotlight	(	void *	tex,
		vector	ctr,
		flt	rad,
		vector	dir,
		flt	fallstart,
		flt	fallend
	)

Definition at line 95 of file light.c.

References point_light_t::attenuationfunc, point_light_t::ctr, point_light_t::fallend, point_light_t::fallstart, point_light_t::Kc, point_light_t::Kl, point_light_t::Kq, light_methods, light_no_attenuation(), light_spotlight_falloff(), point_light_shade_diffuse(), point_light_t::rad, point_light_t::shade_diffuse, point_light_t::spotdir, and point_light_t::spotfunc.

Referenced by rt_spotlight().

point_light_shade_diffuse()

static flt point_light_shade_diffuse ( point_light *  li, shadedata *  shadevars  )

static

Definition at line 183 of file light.c.

References point_light_t::attenuationfunc, point_light_t::ctr, point_light_t::spotfunc, SQRT, VDOT, and VSUB.

Referenced by light_set_attenuation(), and newspotlight().

simple_point_light_shade_diffuse()

static flt simple_point_light_shade_diffuse ( point_light *  li, shadedata *  shadevars  )

static

Definition at line 161 of file light.c.

References point_light_t::ctr, SQRT, VDOT, and VSUB.

Referenced by newpointlight().

Variable Documentation

light_methods

object_methods light_methods

static

Initial value:

= {
  (void (*)(const void *, void *))(light_intersect),
  (void (*)(const void *, const void *, const void *, void *))(light_normal),
  light_bbox, 
  free 
}

Definition at line 26 of file light.c.

Referenced by newdirectionallight(), newpointlight(), and newspotlight().