/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   rtv1.h                                             :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: gbrochar <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2019/02/06 10:11:47 by gbrochar          #+#    #+#             */
/*   Updated: 2019/02/22 16:24:26 by gbrochar         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#ifndef RTV1_H
# define RTV1_H

# include "mlx.h"
# include <math.h>
# include <stdlib.h>

# include "../libft/libft.h"

# define E (double)0.000001
# define TO_RAD (double)57.2957795131
# define SUCCESS 0
# define FAILURE -1
# define TRUE 1
# define FALSE 0

# define PLANE 0
# define SPHERE 1
# define CYLINDER 2
# define CONE 3
# define SPOT 4
# define CAMERA 5
# define SPECULAR 6
# define AMBIENT 7
# define COMMENTARY 8

# define MLX_NOFLAG 0
# define MLX_PTR 1 << 0
# define MLX_WIN 1 << 1
# define MLX_IMG 1 << 2

# define WINX (double)1280
# define WINY (double)720
# define ZOOM (double)1
# define VP_DIST (double)1

# define DEFAULT_AMBIENT (double)0.2
# define DEFAULT_SPEC_RADIUS (double)0.3
# define DEFAULT_SPEC_RATIO (double)1

typedef struct s_vec		t_vec;
typedef struct s_ray		t_ray;

struct						s_vec
{
	double					x;
	double					y;
	double					z;
};

struct						s_ray
{
	t_vec					o;
	t_vec					d;
};

typedef struct s_color		t_color;

struct						s_color
{
	int						r;
	int						g;
	int						b;
};

typedef struct s_plane		t_plane;
typedef struct s_sphere		t_sphere;
typedef struct s_cylinder	t_cylinder;
typedef struct s_cone		t_cone;

struct						s_plane
{
	t_vec					o;
	t_vec					d;
};

struct						s_sphere
{
	t_vec					o;
	double					r;
};

struct						s_cylinder
{
	t_vec					o;
	t_vec					d;
	double					r;
};

struct						s_cone
{
	t_vec					o;
	t_vec					d;
	double					k;
};

typedef struct s_spot		t_spot;

struct						s_spot
{
	t_vec					o;
	double					i;
};

typedef struct s_camera		t_camera;

struct						s_camera
{
	t_vec					o;
	t_vec					d;
	t_vec					uv;
	t_vec					rv;
	t_vec					ul;
	double					width;
	double					height;
	double					dist;
};

typedef struct s_spot_list	t_spot_list;
typedef struct s_obj_list	t_obj_list;

struct						s_obj_list
{
	void					*obj;
	int						type;
	t_color					c;
	double					t;
	t_obj_list				*next;
};

struct						s_spot_list
{
	t_spot					spot;
	t_spot_list				*next;
};

typedef struct				s_mlx
{
	void					*ptr;
	void					*win;
	void					*img;
	int						*data;
	int						size_l;
	int						endian;
	int						bpp;
	int						padding;
}							t_mlx;

typedef struct				s_func
{
	double					(*intersect_obj[4])(void *, t_ray);
	t_vec					(*normal_obj[4])(void *, t_ray, double);
}							t_func;

typedef struct				s_env
{
	t_mlx					mlx;
	t_func					func;
	t_spot_list				*spots;
	t_obj_list				*objs;
	t_camera				camera;
	double					spec_radius;
	double					spec_ratio;
	double					ambient;
}							t_env;

typedef int					(*t_add_elem)(char **, t_env *);

int							parse(char *path, t_env *e);
int							parse_line(char *line, t_env *e);
void						free_parsing(t_env *e);
int							lex(char *str);

int							set_specular(char **data, t_env *e);
int							set_ambient(char **data, t_env *e);
void						init_camera(t_camera *camera);
int							set_camera(char **data, t_env *e);
void						init_spot(t_spot *spot);
int							add_spot(char **data, t_env *e);
void						init_plane(t_plane *plane, t_color *c);
int							add_plane(char **data, t_env *e);
void						init_sphere(t_sphere *sphere, t_color *c);
int							add_sphere(char **data, t_env *e);
void						init_cylinder(t_cylinder *cylinder, t_color *c);
int							add_cylinder(char **data, t_env *e);
void						init_cone(t_cone *cone, t_color *c);
int							add_cone(char **data, t_env *e);

int							add_obj_node(t_env *e, void *obj, int type,
							t_color c);
int							add_spot_node(t_env *e, t_spot spot);

void						mlx_free(char flags, t_mlx *mlx);
void						put_pixel(t_env *e, int x, int y, t_color c);
int							mlx_exit(char flags, t_mlx *mlx);
int							init_mlx(t_env *e);
int							key_hook(int keycode, void *e_void);
int							red_cross_hook(void *e_void);

t_color						color(int r, int g, int b);
t_color						color_add(t_color c1, t_color c2);
t_color						color_mul(t_color c, double scalar);
t_color						color_cap(t_color c);

t_vec						vec(double x, double y, double z);
t_vec						vec_add(t_vec u, t_vec v);
t_vec						vec_sub(t_vec u, t_vec v);
t_vec						vec_mul(t_vec vec, double scalar);
double						vec_length(t_vec vec);
t_vec						cross_product(t_vec u, t_vec v);
double						dot_product(t_vec u, t_vec v);
int							check_direction(t_vec d);
t_vec						normalize(t_vec *vec);

t_ray						set_ray(t_env *e, int x, int y);
t_vec						get_r_vec(t_vec i_ray, t_vec normal);
t_vec						rotate(t_vec vec, t_vec axis, double theta);

int							solve_quadratic(double params[3], double roots[2]);

double						intersect_plane(void *obj, t_ray r);
double						intersect_sphere(void *obj, t_ray r);
double						intersect_cylinder(void *obj, t_ray r);
double						intersect_cone(void *obj, t_ray r);
t_vec						normal_plane(void *obj, t_ray r, double t);
t_vec						normal_sphere(void *obj, t_ray r, double t);
t_vec						normal_cylinder(void *obj, t_ray r, double t);
t_vec						normal_cone(void *obj, t_ray r, double t);

void						raytrace(t_env *e);
void						raytrace_pixel(t_env *e, int x, int y);
t_obj_list					*intersect_ray(t_env *e, t_ray r);
t_color						phong(t_env *e, t_ray r, t_obj_list *obj);

#endif