/* ************************************************************************** */

/* */

/* :::::::: */

/* init_mlx.c :+: :+: */

/* +:+ */

/* By: dnoom <[email protected]> +#+ */

/* +#+ */

/* Created: 2022/04/06 11:25:31 by dnoom #+# #+# */

/* Updated: 2022/04/06 11:25:31 by dnoom ######## odam.nl */

/* */

/* ************************************************************************** */

#include "miniRT.h"

#include "mlx/mlx.h"

#include "vec/vec.h"

#include <math.h>

#define ASPECT_RATIO 1.7777777777

#define DESTROY_NOTIFY 17

void get_lower_left_corner(t_info *info, t_scene *scene)

{

t_vec3f left_edge;

t_vec3f lower_left_corner1;

t_vec3f right;

t_vec3f up;

up = vec3f_init(0, 1, 0);

if (scene->camera->dir.x == 0 && scene->camera->dir.z == 0)

up = vec3f_init(0, 0, 1);

right = vec3f_cross(scene->camera->dir, up);

right = vec3f_unit(right);

up = vec3f_cross(right, scene->camera->dir);

info->horizontal = vec3f_mul(right, info->viewport_width);

info->vertical = vec3f_mul(up, info->viewport_height);

left_edge = vec3f_sub(scene->camera->pos, vec3f_div(info->horizontal, 2));

lower_left_corner1 = vec3f_sub(left_edge, vec3f_div(info->vertical, 2));

info->lower_left_corner = vec3f_add(lower_left_corner1, \

vec3f_mul(scene->camera->dir, info->focal_length));

}

void init_mlx(t_scene *scene)

{

t_info info;

info.mlx_ptr = mlx_init();

info.win_height = (WIN_WIDTH / ASPECT_RATIO);

info.win_ptr = mlx_new_window(info.mlx_ptr, WIN_WIDTH, info.win_height, \

"miniRT");

info.mlximg_ptr = mlx_new_image(info.mlx_ptr, WIN_WIDTH, info.win_height);

init_image(&info);

info.viewport_height = 2.0;

info.viewport_width = ASPECT_RATIO * info.viewport_height;

info.focal_length = (info.viewport_width / \

tan(((scene->camera->fov / 180) * M_PI) / 2)) / 2;

scene->camera->dir = vec3f_unit(scene->camera->dir);

get_lower_left_corner(&info, scene);

paint_img(&info, scene);

mlx_hook(info.win_ptr, DESTROY_NOTIFY, 0, handle_destroy, NULL);

mlx_expose_hook(info.win_ptr, draw_to_window, &info);

mlx_key_hook(info.win_ptr, handle_key, &info);

if (!PROFILE && !HEADLESS)

mlx_loop(info.mlx_ptr);

}