RayTracer/miniRT.h

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   miniRT.h                                           :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: yantoine <yantoine@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2025/02/13 20:02:36 by yantoine          #+#    #+#             */
/*   Updated: 2025/02/17 18:58:31 by yantoine         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#ifndef MINIRT_H
# define MINIRT_H

# include <SDL2/SDL.h>
# include <math.h>
# include <stdbool.h>
# include <stdio.h>
# include <stdlib.h>
# include <string.h>
# include "libft.h"
# include "float.h"

// ----- Taille ecran ----
# define WIDTH 320
# define HEIGHT 240

// ----- Tableaux de la scène -----
# define MAX_SPHERES 128
# define MAX_PLANES 128
# define MAX_CYLINDERS 128
# define MAX_LIGHTS 16
# define MAX_AMBIENT 1
# define MAX_CAMERA 1

// ----- Calcul d'interesction

typdef struct s_calc
{
	t_vec3	oc;
	float	a;
	float	b;
	float	c;
	float	disc;
	float	sqrtDisc;
	float	t0;
	float	t1;
	float	t;
	t_vec3	hitPoint;
	t_vec3	d;
	t_vec3	v;
	float	d_dot_v;
	float	oc_dot_v;
	t_vec3	d_perp;
	t_vec3	oc_perp;
	float	t_side;
	float	y;
	float	t_cap;
	float	t_bot;
	float	t_top;
	t_vec3	p;
	t_vec3	cp;
	float	dist;
	float	t_final;
	float	proj;
	t_vec3	n;
}				t_calc;

// ----- Espace 3d
typedef struct s_vec3
{
	float		x;
	float		y;
	float		z;
}				t_vec3;

// ----- Ray -----
typedef struct s_ray
{
	t_vec3		origin;
	t_vec3		dir;
}				t_ray;

// ----- Objets de la scène -----
typedef struct s_sphere
{
	t_vec3		center;
	float		radius;
	t_vec3		color;
}				t_sphere;

typedef struct s_plane
{
	t_vec3		point;
	t_vec3		normal;
	t_vec3		color;
}				t_plane;

typedef struct s_cylinder
{
	t_vec3		center;
	t_vec3 axis;  // Axe normalisé
	float radius; // Demi-diamètre
	float		height;
	t_vec3		color;
}				t_cylinder;

typedef struct s_light
{
	t_vec3		pos;
	float		brightness;
	t_vec3		color;
}				t_light;

typedef struct s_ambient
{
	float		ambient_ratio;
	t_vec3		ambient_color;
}				t_ambient;

typedef struct s_camera
{
	t_vec3		camPos;
	t_vec3		camDir;
	float		fov;
	float		yaw;// vue de gauche a droite
	float		pitch; // vue de haut en bas en radians
}				t_camera;

typedef struct s_scene
{
	t_sphere	spheres[MAX_SPHERES];
	t_plane		planes[MAX_PLANES];
	t_cylinder	cylinders[MAX_CYLINDERS];
	t_light		lights[MAX_LIGHTS];
	t_ambient	ambient;
	t_camera	camera;
	int			numSpheres;
	int			numPlanes;
	int			numCylinders;
	int			numLights;
	int			numAmbient;
	const char 		*line_if_exit;
	const int		fd_if_exit;
	const char		**token_if_exit;
}				t_scene;

//	Calcul de vecteur
t_vec3			vec3_add(t_vec3 a, t_vec3 b);
t_vec3			vec3_sub(t_vec3 a, t_vec3 b);
t_vec3			vec3_scale(t_vec3 a, float s);
float			vec3_dot(t_vec3 a, t_vec3 b);
t_vec3			vec3_cross(t_vec3 a, t_vec3 b);
float			vec3_length(t_vec3 a);
t_vec3			vec3_normalize(t_vec3 a);
t_vec3			vec3_mul(t_vec3 a, t_vec3 b);

//	Config de scene
t_scene			create_scene(void);
t_scene			load_config(const char *filename);
t_scene			parsing_ambiant(const char *line, t_scene scene);
t_scene			parsing_camera(const char *line, t_scene scene);
t_scene			parsing_light(const char *line, t_scene scene);
t_scene			parsing_sphere(const char *line, t_scene scene);
t_scene			parsing_plane(const char *line, t_scene scene);
t_scene			parsing_cylindre(const char *line, t_scene scene);
t_vec3			parse_color(const char *token, t_scene scene);
t_vec3			parse_vector(const char *token, t_scene scene);
t_vec3			parse_vector_normalize(const char *token, t_scene scene);


//	Parsing utils
inline	char	**get_tokens_secure(t_scene scene, const int numObject, const int numObjectMax, const int supposed_nb_token);

//	Check
inline int	check_tokens(char **tokens, const int to_test, int expected);
inline void	check_if_max(t_scene scene, const int to_test, const int max);

//	Intersection
float	intersectCylinder(Ray ray, Cylinder cy, t_vec3 *hitNormal);
float	intersectPlane(Ray ray, Plane p, t_vec3 *hitNormal);
float	intersectSphere(Ray ray, Sphere s, t_vec3 *hitNormal);
bool	isInShadow(t_vec3 hitPoint, t_vec3 lightPos);
#endif