cub3d/src/main.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   main.c                                             :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: kcolin <kcolin@42.fr>                      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2025/07/17 14:14:30 by kcolin            #+#    #+#             */
/*   Updated: 2025/07/28 15:21:17 by kcolin           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "../libft/includes/libft.h"
#include "../mlx/mlx.h"
#include "consts.h"
#include "cub3d_data.h"
#include "draw/drawutils.h"
#include "map/map_checker.h"
#include "draw/draw_map.h"
#include "map/mapdata.h"
#include "player/player.h"
#include "utils/hooks.h"
#include "utils/frees.h"
#include <stdbool.h>
#include <X11/keysym.h>
#include <X11/X.h>
#include <unistd.h>
#include <fcntl.h>
#include <math.h>

void	init_player(t_mapdata *mapdata, t_player *player)
{
	player->health = 100;
	player->x = mapdata->startx * SIZE;
	player->y = mapdata->starty * SIZE;
	if (mapdata->map[mapdata->starty][mapdata->startx] == 'N')
		player->yaw = M_PI;
	else if (mapdata->map[mapdata->starty][mapdata->startx] == 'S')
		player->yaw = 0;
	else if (mapdata->map[mapdata->starty][mapdata->startx] == 'E')
		player->yaw = M_PI / 2;
	else if (mapdata->map[mapdata->starty][mapdata->startx] == 'W')
		player->yaw = 3 * M_PI / 2;
}

bool	touch(float px, float py, t_mapdata *map)
{
	int	x;
	int	y;

	x = px / SIZE;
	y = py / SIZE;
	if (map->map[y][x] == '1')
		return (true);
	return (false);
}

void draw_line(t_cub3d_data *data, float start_angle)
{
	float cos_angle = cos(start_angle);
	float sin_angle = sin(start_angle);
	float ray_x = data->player.x;
	float ray_y = data->player.y;

	while(!touch(ray_x, ray_y, data->map))
	{
		my_mlx_pixel_put(data->img_data, (int)(MAP_SIZE * (ray_x / SIZE)), (int)(MAP_SIZE * (ray_y / SIZE)), 0xcc241b);
		ray_x += sin_angle;
		ray_y += cos_angle;
	}
}

t_cardinal_dir angle_cardinal_dir(float angle)
{
	if (angle >= g_southwest || (angle > g_south && angle < g_southeast))
		return (SOUTH);
	if (angle >= g_southeast && angle < g_northeast)
		return (EAST);
	if (angle >= g_northeast && angle < g_northwest)
		return (NORTH);
	return (WEST);
}

t_cardinal_dir	player_cardinal_dir(t_player player)
{
	return (angle_cardinal_dir(player.yaw));
}

t_intercardinal_dir angle_intercardinal_dir(float angle)
{
	if (angle >= g_south && angle < g_east)
		return (SOUTHEAST);
	if (angle >= g_east && angle < g_north)
		return (NORTHEAST);
	if (angle >= g_north && angle < g_west)
		return (NORTHWEST);
	return (SOUTHWEST);
}

t_intercardinal_dir	player_intercardinal_dir(t_player player)
{
	return (angle_intercardinal_dir(player.yaw));
}

int	game_loop(t_cub3d_data *data)
{
	mlx_destroy_image(data->mlx, data->img_data->img);
	data->img_data->img = mlx_new_image(data->mlx, WIDTH, HEIGHT);

	if (player_intercardinal_dir(data->player) == SOUTHEAST)
		ft_printf("southeast ");
	if (player_intercardinal_dir(data->player) == SOUTHWEST)
		ft_printf("southwest ");
	if (player_intercardinal_dir(data->player) == NORTHEAST)
		ft_printf("northeast ");
	if (player_intercardinal_dir(data->player) == NORTHWEST)
		ft_printf("northwest ");

	if (player_cardinal_dir(data->player) == SOUTH)
		ft_printf("south\n");
	if (player_cardinal_dir(data->player) == EAST)
		ft_printf("east\n");
	if (player_cardinal_dir(data->player) == NORTH)
		ft_printf("north\n");
	if (player_cardinal_dir(data->player) == WEST)
		ft_printf("west\n");

	float ray_angle = data->player.yaw - M_PI / 6;
	float fraction = M_PI / 3 / WIDTH;
	int column = 0;
	while (column < WIDTH)
	{
		// hline check
		/* float ray_atan = atan(ray_angle); */
		draw_line(data, ray_angle);
		column++;
		ray_angle += fraction;
	}

	draw_map(data->map, &data->player, data->img_data);
	mlx_put_image_to_window(data->mlx, data->mlx_win,
		data->img_data->img, 0, 0);
	mlx_string_put(data->mlx, data->mlx_win, 10, 10, 0x00FFFFFF, COMPILED_TEXT);
	return (0);
}

int	main(int argc, char **argv)
{
	t_cub3d_data	data;

	if (argc < 2)
		return (ft_printf("Error: Missing cub3d file\n"), 1);
	data.map = ft_calloc(sizeof(t_mapdata), 1);
	if (!check_cubfile(argv[1], data.map))
		return (ft_printf("Error: Wrong map file. Reason: %s\n",
				data.map->error), free_map(data.map), 1);
	data.mlx = mlx_init();
	if (data.mlx == NULL)
		return (ft_printf("Error: Failed to initalize mlx\n"),
			free_map(data.map), 1);
	data.mlx_win = mlx_new_window(data.mlx, WIDTH, HEIGHT, "Cub3d");
	data.img_data = ft_calloc(sizeof(t_img_data), 1);
	data.img_data->img = mlx_new_image(data.mlx, WIDTH, HEIGHT);
	data.img_data->addr = mlx_get_data_addr(data.img_data->img,
			&data.img_data->bits_per_pixel, &data.img_data->line_length,
			&data.img_data->endian);
	init_player(data.map, &(data.player));
	mlx_hook(data.mlx_win, KeyPress, KeyPressMask, keypress_handler, &data);
	mlx_hook(data.mlx_win, KeyRelease, KeyReleaseMask,
		keyrelease_handler, &data);
	mlx_loop_hook(data.mlx, game_loop, &data);
	mlx_loop(data.mlx);
}