float *ft_lambert(t_th *mlx, t_obj *tmp, t_obj *light, float *tab)
{
t_vec pos;
t_vec dist;
float d;
pos = (t_vec){mlx->cam_pos.x + mlx->t * mlx->ray_dir.x, mlx->cam_pos.y +
mlx->t * mlx->ray_dir.y, mlx->cam_pos.z + mlx->t * mlx->ray_dir.z};
mlx->norm = ft_norm(mlx, tmp, pos);
while (light != NULL)
{
LAMBERT = 0.15;
dist = ft_vectorsub(&light->pos, &pos);
d = ft_clamp((1.0 / sqrtf(sqrtf(ft_vectordot(&dist, &dist)))), 0., 1.);
ft_vectornorm(&dist);
if (ft_shadow(mlx, tmp, light, pos) == 0)
LAMBERT += ft_clamp(ft_vectordot(&dist, &mlx->norm), 0.0, 1.0);
tab = ft_endlight(tmp, light, tab, d);
tab[0] += (COND2) ? ft_spec(mlx, dist, d, tab[3]) : 0.0;
tab[1] += (COND2) ? ft_spec(mlx, dist, d, tab[3]) : 0.0;
tab[2] += (COND2) ? ft_spec(mlx, dist, d, tab[3]) : 0.0;
light = light->next;
}
mlx->refpos = (t_vec){mlx->ray_dir.x, mlx->ray_dir.y, mlx->ray_dir.z};
return ((PREF2) ? tab : ft_reflect(mlx, tmp, &pos, tab));
}
static float *ft_reflect(t_th *mlx, t_obj *tmp, t_vec *pos, float *tab)
{
t_obj *tmp2;
t_obj *light;
t_vec dist;
double d;
if (mlx->cpt >= mlx->maxref || (light = mlx->light) == NULL)
return (tab);
if ((tmp2 = ft_ref_init(mlx, tmp, pos)) == NULL || (mlx->cpt++) < 0)
return (tab);
while (light != NULL)
{
LAMBERT = 0.14;
dist = ft_vectorsub(&light->pos, pos);
d = ft_clamp(1.0 / sqrtf(sqrtf(ft_vectordot(&dist, &dist))), 0.0, 1.0);
ft_vectornorm(&dist);
if (ft_shadow(mlx, tmp2, light, *pos) == 0)
LAMBERT += ft_clamp(ft_vectordot(&dist, &mlx->norm), 0.0, 1.0);
tab = ft_endlight(tmp2, light, tab, d);
tab[0] += (COND1) ? ft_spec(mlx, dist, d, tab[3]) : 0.0;
tab[1] += (COND1) ? ft_spec(mlx, dist, d, tab[3]) : 0.0;
tab[2] += (COND1) ? ft_spec(mlx, dist, d, tab[3]) : 0.0;
light = light->next;
}
return ((PREF1) ? tab : ft_reflect(mlx, tmp2, pos, tab));
}
float *ft_endlight(t_obj *tmp, t_obj *light, float *tab, float d)
{
LAMBERT = ft_clamp(LAMBERT * 4.0 * d, 0.0, 1.0);
tab[0] += LAMBERT * (tmp->col.red / 255) * (light->col.red / 255);
tab[1] += LAMBERT * (tmp->col.green / 255) * (light->col.green / 255);
tab[2] += LAMBERT * (tmp->col.blue / 255) * (light->col.blue / 255);
return (tab);
}
void vecclamp(t_vec3 *vec, double a, double b)
{
vec->x = ft_clamp(vec->x, a, b);
vec->y = ft_clamp(vec->y, a, b);
vec->z = ft_clamp(vec->z, a, b);
}
