/*
 * CS5600 University of Utah
 * Charles McGarvey
 * mcgarvey@eng.utah.edu
 */

#ifndef _LIGHT_H_
#define _LIGHT_H_

#include "color.h"
#include "vec.h"


/*
 * A light source.
 */
struct light
{
    vec_t   v;  // position
    color_t d;  // diffuse
    color_t s;  // specular
};
typedef struct light light_t;

/*
 * Initialize a light with a position and color.
 */
INLINE_MAYBE
void light_init(light_t* l, vec_t position, color_t diffuse, color_t specular)
{
    l->v = position;
    l->d = diffuse;
    l->s = specular;
}


/*
 * Create a new light with a position and color.
 */
INLINE_MAYBE
light_t light_new(vec_t position, color_t diffuse, color_t specular)
{
    light_t l;
    light_init(&l, position, diffuse, specular);
    return l;
}


/*
 * Create a new light on the heap.
 */
INLINE_MAYBE
light_t* light_alloc(vec_t position, color_t diffuse, color_t specular)
{
    light_t* l = (light_t*)mem_alloc(sizeof(light_t));
    light_init(l, position, diffuse, specular);
    return l;
}

INLINE_MAYBE
light_t* light_copy(light_t l)
{
    light_t* n = (light_t*)mem_alloc(sizeof(light_t));
    memcpy(n, &l, sizeof(light_t));
    return n;
}


#endif // _LIGHT_H_