files restructuration

14 files changed, 1072 insertions, 0 deletions

diff --git a/src/capture.c b/src/capture.c
new file mode 100644
index 0000000..521774a
--- /dev/null
+++ b/src/capture.c
@@ -0,0 +1,25 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   capture.c                                          :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: cacharle <marvin@42.fr>                    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2020/01/11 13:15:11 by cacharle          #+#    #+#             */
+/*   Updated: 2020/01/16 07:49:17 by cacharle         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "cub3d.h"
+
+int		capture(t_state *state)
+{
+	printf("capture\n");
+	/* render_update_window(state); */
+	/* write_bmp(&state->window); */
+	return (0);
+}
+
+void	write_bmp(t_image *image)
+{
+}
diff --git a/src/error.c b/src/error.c
new file mode 100644
index 0000000..eb94c9f
--- /dev/null
+++ b/src/error.c
@@ -0,0 +1,48 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   error.c                                            :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: cacharle <marvin@42.fr>                    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2020/01/11 13:33:14 by cacharle          #+#    #+#             */
+/*   Updated: 2020/01/11 13:34:18 by cacharle         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "cub3d.h"
+
+void	error_put_usage_exit(char *name)
+{
+	ft_putstr_fd(name, STDERR_FILENO);
+	ft_putendl_fd(": missing file operand", STDERR_FILENO);
+	ft_putstr_fd("Usage: ", STDERR_FILENO);
+	ft_putstr_fd(name, STDERR_FILENO);
+	ft_putendl_fd(" [.cub file] [--save]", STDERR_FILENO);
+	exit(EXIT_FAILURE);
+}
+
+void	error_put(char *message)
+{
+	ft_putstr("Error\nCouldnt ");
+	ft_putendl(message);
+}
+
+void	*error_put_return(char *message)
+{
+	error_put(message);
+	return (NULL);
+}
+
+void	*error_put_return_state_destroy(char *message, t_state *state)
+{
+	state_destroy(state);
+	return (error_put_return(message));
+}
+
+void	*error_put_return_lines_state_destroy(
+			char *message, t_state *state, char **lines)
+{
+	helper_free_splited(lines);
+	return (error_put_return_state_destroy(message, state));
+}
diff --git a/src/event.c b/src/event.c
new file mode 100644
index 0000000..9dcaa75
--- /dev/null
+++ b/src/event.c
@@ -0,0 +1,45 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   event.c                                            :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: cacharle <marvin@42.fr>                    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2019/11/15 06:39:37 by cacharle          #+#    #+#             */
+/*   Updated: 2020/01/30 15:20:18 by cacharle         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "cub3d.h"
+
+#define ROTATE_STEP (M_PI / 40.0)
+#define MOVE_SPEED 0.25
+
+int	event_keydown(int key, t_state *state)
+{
+	if (key == MLXK_ESC)
+		state->running = FALSE;
+	else if (key == MLXK_A)
+		state->pos = vector_add(state->pos,
+				vector_scale(vector_rotate(state->dir, -M_PI_2), MOVE_SPEED));
+	else if (key == MLXK_D)
+		state->pos = vector_add(state->pos,
+				vector_scale(vector_rotate(state->dir, M_PI_2), MOVE_SPEED));
+	else if (key == MLXK_W)
+		state->pos = vector_add(state->pos,
+				vector_scale(state->dir, MOVE_SPEED));
+	else if (key == MLXK_S)
+		state->pos = vector_add(state->pos,
+				vector_scale(state->dir, -MOVE_SPEED));
+	else if (key == MLXK_LEFT)
+		helper_rotate_player(state, -ROTATE_STEP);
+	else if (key == MLXK_RIGHT)
+		helper_rotate_player(state, ROTATE_STEP);
+	return (0);
+}
+
+int	event_quit(t_state *state)
+{
+	state->running = FALSE;
+	return (0);
+}
diff --git a/src/helper.c b/src/helper.c
new file mode 100644
index 0000000..9940848
--- /dev/null
+++ b/src/helper.c
@@ -0,0 +1,60 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   helper.c                                           :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: cacharle <marvin@42.fr>                    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2020/01/11 07:32:20 by cacharle          #+#    #+#             */
+/*   Updated: 2020/01/16 08:57:01 by cacharle         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "cub3d.h"
+
+t_bool	helper_is_player_cell(t_cell cell)
+{
+	return (cell == CELL_LOOK_NORTH || cell == CELL_LOOK_SOUTH ||
+			cell == CELL_LOOK_WEST || cell == CELL_LOOK_EAST);
+}
+
+void	helper_free_splited(char **splited)
+{
+	int	i;
+
+	if (splited == NULL)
+		return ;
+	i = -1;
+	while (splited[++i] != NULL)
+		free(splited[i]);
+	free(splited);
+}
+
+void	helper_rotate_player(t_state *state, double rotation)
+{
+	state->dir = vector_rotate(state->dir, rotation);
+	state->plane = vector_rotate(state->plane, rotation);
+}
+
+/*
+** Initial player direction vector
+** Since the map [0 0] is in the top left corner the north/south direction are slipped.
+** The camera plane has to stay perpendicular to the direction and
+** create a camera with a 66 degree angle (which is a recommended angle for fps)
+*/
+
+void	helper_init_dir_plane(t_state *state, int y, int x)
+{
+	if (state->map[y][x] == CELL_LOOK_NORTH)
+		state->dir.y = -1.0;
+	else if (state->map[y][x] == CELL_LOOK_SOUTH)
+		state->dir.y = 1.0;
+	else if (state->map[y][x] == CELL_LOOK_WEST)
+		state->dir.x = -1.0;
+	else if (state->map[y][x] == CELL_LOOK_EAST)
+		state->dir.x = 1.0;
+	state->plane = vector_rotate(state->dir, M_PI_2);
+	state->plane = vector_scale(state->plane, 1.0 / vector_norm(state->plane));
+	state->plane = vector_scale(state->plane, 0.66);
+	state->plane = vector_apply(state->plane, &fabs);
+}
diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..00a041d
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,77 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   main.c                                             :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: cacharle <marvin@42.fr>                    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2019/11/15 06:39:39 by cacharle          #+#    #+#             */
+/*   Updated: 2020/01/30 14:02:58 by cacharle         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "cub3d.h"
+
+int	main(int argc, char **argv)
+{
+	t_state		*state;
+
+	if (argc != 2 && !(argc == 3 && ft_strcmp(argv[2], "--save") == 0))
+		error_put_usage_exit(argv[0]);
+	if ((state = state_new(parse_check(parse(argv[1])))) == NULL)
+		return (1);
+	if (argc == 3)
+		return (capture(state));
+	/* printf("%d\n", state->window.size_line); */
+	mlx_hook(state->window_ptr, 2, (1L << 1), event_keydown, (void*)state);
+	mlx_hook(state->window_ptr, 17L, 0, event_quit, (void*)state);
+	mlx_loop_hook(state->mlx_ptr, render_update, (void*)state);
+	mlx_loop(state->mlx_ptr);
+	/* while (1) */
+	/* 	render_update(state); */
+	return (0);
+}
+
+/*
+int main(int argc, char **argv)
+{
+	(void)argc;
+	t_state *s = parse_check(parse(argv[1]));
+	if (s == NULL)
+		return (1);
+	printf("R %d %d\n", s->window.width, s->window.height);
+	printf("NO %s\n", s->textures_path[TEX_NORTH]);
+	printf("SO %s\n", s->textures_path[TEX_SOUTH]);
+	printf("WE %s\n", s->textures_path[TEX_WEST]);
+	printf("EA %s\n\n", s->textures_path[TEX_EAST]);
+	printf("S %s\n", s->textures_path[TEX_SPRITE]);
+	printf("F %d,%d,%d\n", s->floor_color.rgb.r, s->floor_color.rgb.g, s->floor_color.rgb.b);
+	printf("C %d,%d,%d\n\n", s->ceilling_color.rgb.r, s->ceilling_color.rgb.g, s->ceilling_color.rgb.b);
+
+	printf("%dx%d\n", s->map_height, s->map_width);
+	for (int i = 0; i < s->map_height; i++)
+	{
+		for (int j = 0; j < s->map_width; j++)
+		{
+			if (s->map[i][j] == CELL_WALL)
+				printf("#");
+			else if (s->map[i][j] == CELL_EMPTY)
+				printf(" ");
+			else
+				printf("%d", s->map[i][j]);
+			if (j != s->map_width - 1)
+				printf(" ");
+		}
+		printf("\n");
+	}
+	printf("post state_new\n");
+	if ((s = state_new(s)) == NULL)
+	{
+		printf("Error: state new");
+		return 1;
+	}
+	printf("state->pos [%f %f]\n", s->pos.x, s->pos.y);
+	state_destroy(s);
+	return 0;
+}
+*/
diff --git a/src/parse/parse.c b/src/parse/parse.c
new file mode 100644
index 0000000..f4b5b66
--- /dev/null
+++ b/src/parse/parse.c
@@ -0,0 +1,142 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   parse.c                                            :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: cacharle <marvin@42.fr>                    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2019/11/15 09:29:21 by cacharle          #+#    #+#             */
+/*   Updated: 2020/01/30 12:03:54 by cacharle         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "cub3d.h"
+
+t_state	*parse(char *filename)
+{
+	int		i;
+	char	**lines;
+	t_state	*state;
+
+	if ((state = state_new_empty()) == NULL)
+		return (error_put_return("create empty state"));
+	if ((lines = get_file_lines(filename)) == NULL)
+		return (error_put_return_state_destroy("read .cub file", state));
+	i = -1;
+	while (lines[++i] != NULL)
+	{
+		if (*lines[i] == '1')
+			break ;
+		if (!parse_line(state, lines[i]))
+			return (error_put_return_lines_state_destroy(
+						"parse configuration", state, lines));
+	}
+	if ((state = parse_map(state, lines + i)) == NULL)
+		return (error_put_return_lines_state_destroy(
+					"parse map", state, lines));
+	helper_free_splited(lines);
+	return (state);
+}
+
+char	**get_file_lines(char *filename)
+{
+	int		fd;
+	int		ret;
+	char	buf[CUB3D_BUFFER_SIZE + 1];
+	char	*file;
+
+	if ((fd = open(filename, O_RDONLY)) < 0)
+		return (NULL);
+	if ((file = ft_strdup("")) == NULL)
+		return (NULL);
+	while ((ret = read(fd, buf, CUB3D_BUFFER_SIZE)) > 0)
+	{
+		buf[ret] = '\0';
+		if ((file = ft_strjoin(file, buf)) == NULL)
+			return (NULL);
+	}
+	if (ret == -1)
+		return (NULL);
+	close(fd);
+	return (ft_split(file, '\n'));
+}
+
+static t_option_parser	g_option_parsers[] =
+{
+	{"R", parse_resolution},
+	{"NO", parse_north_texture},
+	{"SO", parse_south_texture},
+	{"WE", parse_west_texture},
+	{"EA", parse_east_texture},
+	{"S", parse_sprite_texture},
+	{"F", parse_floor_color},
+	{"C", parse_ceilling_color}
+};
+
+#define OPTIONS_PARSERS_SIZE (sizeof(g_option_parsers) / sizeof(t_option_parser))
+
+t_bool	parse_line(t_state *state, char *line)
+{
+	int i;
+
+	if (!*line)
+		return (TRUE);
+	i = -1;
+	while (++i < (int)OPTIONS_PARSERS_SIZE)
+		if (ft_strncmp(g_option_parsers[i].id, line,
+				ft_strlen(g_option_parsers[i].id)) == 0)
+			return (g_option_parsers[i].func(
+					state, line + ft_strlen(g_option_parsers[i].id) + 1));
+	return (FALSE);
+}
+
+t_state	*parse_map(t_state *state, char **lines)
+{
+	int		i;
+
+	i = -1;
+	while (lines[++i] != NULL)
+		if (*lines[i] != '1')
+			return (NULL);
+	state->map_height = i;
+	if ((state->map = (t_map)malloc(sizeof(t_cell*) * i)) == NULL)
+		return (NULL);
+	state->map_width = ft_strcount(*lines, '1');
+	i = -1;
+	while (lines[++i] != NULL)
+		if ((state->map[i] = create_map_row(lines[i])) == NULL)
+			return (NULL);
+	return (state);
+}
+
+t_cell	*create_map_row(char *line)
+{
+	int		i;
+	t_cell	*row;
+
+	if ((row = (t_cell*)malloc(sizeof(t_cell) * ft_strlen(line))) == NULL)
+		return (NULL);
+	i = 0;
+	while (*line)
+	{
+		if (*line == '0' || *line == '1' || *line == '2')
+			row[i++] = *line - '0';
+		else if (*line == 'N')
+			row[i++] = CELL_LOOK_NORTH;
+		else if (*line == 'S')
+			row[i++] = CELL_LOOK_SOUTH;
+		else if (*line == 'W')
+			row[i++] = CELL_LOOK_WEST;
+		else if (*line == 'E')
+			row[i++] = CELL_LOOK_EAST;
+		else
+		{
+			free(row);
+			return (NULL);
+		}
+		line++;
+		while (*line == ' ')
+			line++;
+	}
+	return (row);
+}
diff --git a/src/parse/parse_check.c b/src/parse/parse_check.c
new file mode 100644
index 0000000..a65d74a
--- /dev/null
+++ b/src/parse/parse_check.c
@@ -0,0 +1,46 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   check.c                                            :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: cacharle <marvin@42.fr>                    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2020/01/11 10:59:15 by cacharle          #+#    #+#             */
+/*   Updated: 2020/01/11 13:03:33 by cacharle         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "cub3d.h"
+
+t_state		*parse_check(t_state *state)
+{
+	int	i;
+	/* int	j; */
+	/* int player_count; */
+
+	i = -1;
+	while (++i < state->map_width)
+		if (state->map[0][i] != CELL_WALL
+				|| state->map[state->map_height - 1][i] != CELL_WALL)
+			return (error_put_return_state_destroy(
+						"validate map without borders", state));
+	i = -1;
+	while (++i < state->map_height)
+		if (state->map[i][0] != CELL_WALL
+				|| state->map[i][state->map_width - 1] != CELL_WALL)
+			return (error_put_return_state_destroy(
+						"validate map without borders", state));
+	// maybe not necessary
+	/* player_count = 0; */
+	/* i = -1; */
+	/* while (++i < state->map_height) */
+	/* { */
+	/* 	j = -1; */
+	/* 	while (++j < state->map_width) */
+	/* 		if (helper_is_player_cell(state->map[i][j])) */
+	/* 			player_count++; */
+	/* } */
+	/* if (player_count != 1) */
+	/* 	return (state_destroy(state)); */
+	return (state);
+}
diff --git a/src/parse/parse_color.c b/src/parse/parse_color.c
new file mode 100644
index 0000000..fd482e5
--- /dev/null
+++ b/src/parse/parse_color.c
@@ -0,0 +1,55 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   parse_color.c                                      :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: cacharle <marvin@42.fr>                    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2020/01/11 09:52:34 by cacharle          #+#    #+#             */
+/*   Updated: 2020/01/30 14:17:37 by cacharle         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "cub3d.h"
+
+t_bool	parse_ceilling_color(t_state *state, char *line)
+{
+	int	tmp;
+
+	state->ceilling_color.hexcode = 0x0;
+	if ((tmp = ft_atoi(line)) > 255 || tmp < 0) // cant do atoi due to overflow stuff, use ft_strtol
+		return (FALSE);
+	state->ceilling_color.rgb.r = (t_byte)tmp;
+	if ((line = ft_strchr(line, ',') + 1) == NULL)
+		return (FALSE);
+	if ((tmp = ft_atoi(line)) > 255 || tmp < 0)
+		return (FALSE);
+	state->ceilling_color.rgb.g = (t_byte)tmp;
+	if ((line = ft_strchr(line, ',') + 1) == NULL)
+		return (FALSE);
+	if ((tmp = ft_atoi(line)) > 255 || tmp < 0)
+		return (FALSE);
+	state->ceilling_color.rgb.b = (t_byte)tmp;
+	return (TRUE);
+}
+
+t_bool	parse_floor_color(t_state *state, char *line)
+{
+	int	tmp;
+
+	state->floor_color.hexcode = 0x0;
+	if ((tmp = ft_atoi(line)) > 255 || tmp < 0)
+		return (FALSE);
+	state->floor_color.rgb.r = (t_byte)tmp;
+	if ((line = ft_strchr(line, ',') + 1) == NULL)
+		return (FALSE);
+	if ((tmp = ft_atoi(line)) > 255 || tmp < 0)
+		return (FALSE);
+	state->floor_color.rgb.g = (t_byte)tmp;
+	if ((line = ft_strchr(line, ',') + 1) == NULL)
+		return (FALSE);
+	if ((tmp = ft_atoi(line)) > 255 || tmp < 0)
+		return (FALSE);
+	state->floor_color.rgb.b = (t_byte)tmp;
+	return (TRUE);
+}
diff --git a/src/parse/parse_resolution.c b/src/parse/parse_resolution.c
new file mode 100644
index 0000000..d6c5759
--- /dev/null
+++ b/src/parse/parse_resolution.c
@@ -0,0 +1,24 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   parse_resolution.c                                 :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: cacharle <marvin@42.fr>                    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2019/11/15 09:29:27 by cacharle          #+#    #+#             */
+/*   Updated: 2020/01/11 09:44:18 by cacharle         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "cub3d.h"
+
+t_bool	parse_resolution(t_state *state, char *line)
+{
+	if ((state->window.width = ft_atoi(line)) < 0)
+		return (FALSE);
+	if ((line = ft_strrchr(line, ' ') + 1) == NULL)
+		return (FALSE);
+	if ((state->window.height = ft_atoi(line)) < 0)
+		return (FALSE);
+	return (TRUE);
+}
diff --git a/src/parse/parse_textures.c b/src/parse/parse_textures.c
new file mode 100644
index 0000000..a0fb8f6
--- /dev/null
+++ b/src/parse/parse_textures.c
@@ -0,0 +1,48 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   parse_textures.c                                   :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: cacharle <marvin@42.fr>                    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2020/01/11 09:47:53 by cacharle          #+#    #+#             */
+/*   Updated: 2020/01/11 09:51:03 by cacharle         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "cub3d.h"
+
+t_bool	parse_north_texture(t_state *state, char *line)
+{
+	if ((state->textures_path[TEX_NORTH] = ft_strdup(line)) == NULL)
+		return (FALSE);
+	return (TRUE);
+}
+
+t_bool	parse_south_texture(t_state *state, char *line)
+{
+	if ((state->textures_path[TEX_SOUTH] = ft_strdup(line)) == NULL)
+		return (FALSE);
+	return (TRUE);
+}
+
+t_bool	parse_west_texture(t_state *state, char *line)
+{
+	if ((state->textures_path[TEX_WEST] = ft_strdup(line)) == NULL)
+		return (FALSE);
+	return (TRUE);
+}
+
+t_bool	parse_east_texture(t_state *state, char *line)
+{
+	if ((state->textures_path[TEX_EAST] = ft_strdup(line)) == NULL)
+		return (FALSE);
+	return (TRUE);
+}
+
+t_bool	parse_sprite_texture(t_state *state, char *line)
+{
+	if ((state->textures_path[TEX_SPRITE] = ft_strdup(line)) == NULL)
+		return (FALSE);
+	return (TRUE);
+}
diff --git a/src/render.c b/src/render.c
new file mode 100644
index 0000000..88b0cae
--- /dev/null
+++ b/src/render.c
@@ -0,0 +1,107 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   render.c                                           :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: cacharle <marvin@42.fr>                    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2020/01/11 13:37:17 by cacharle          #+#    #+#             */
+/*   Updated: 2020/01/30 15:17:49 by cacharle         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "cub3d.h"
+
+int		render_update(void *param)
+{
+	t_state *state;
+
+	state = param;
+	if (!state->running)
+	{
+		state_destroy(state);
+		exit(EXIT_SUCCESS);
+		return (0);
+	}
+	render_update_window(state);
+	mlx_put_image_to_window(state->mlx_ptr, state->window_ptr, state->window.id, 0, 0);
+	return (0);
+}
+
+void	render_update_window(t_state *state)
+{
+	int x;
+
+	x = -1;
+	while (++x < state->window.width)
+		render_column(state, x);
+}
+
+void	render_column(t_state *state, int x)
+{
+	t_render_state	rstate;
+
+	rstate.x = x;
+	rstate_ray(state, &rstate);
+	rstate.map_pos = vector_new((double)((int)state->pos.x), (double)((int)state->pos.y)); //floor?
+	rstate_delta(&rstate);
+	rstate_init_probe(state, &rstate);
+	rstate.map_step = vector_new(rstate.ray.x < 0.0 ? -1.0 : 1.0, rstate.ray.y < 0.0 ? -1.0 : 1.0);
+	while (TRUE)
+	{
+		rstate.side = rstate.probe.x < rstate.probe.y ? SIDE_WE : SIDE_NS;
+		rstate_next_probe(&rstate);
+		if (state->map[(int)rstate.map_pos.y][(int)rstate.map_pos.x] == CELL_WALL)
+			break ;
+	}
+	rstate_perp_dist(state, &rstate);
+	rstate_line_height(state, &rstate);
+	rstate.draw_start = state->window.height / 2 - rstate.line_height / 2;
+	rstate.draw_end = state->window.height / 2 + rstate.line_height / 2;
+	if (rstate.draw_start < 0)
+		rstate.draw_start = 0;
+	if (rstate.draw_end > state->window.height - 1)
+		rstate.draw_end = state->window.height - 1;
+	render_window_column(state, &rstate);
+}
+
+void	render_window_column(t_state *state, t_render_state *rstate)
+{
+	int		i;
+	t_color	white;
+
+	white.hexcode = 0x00ffffff;
+	i = 0;
+	while (i < rstate->draw_start)
+		((t_color*)state->window.data)[i++ * state->window.width + rstate->x] = state->ceilling_color;
+	while (i < rstate->draw_end)
+		((t_color*)state->window.data)[i++ * state->window.width + rstate->x] = white;
+	render_texture(state, rstate);
+	i = rstate->draw_end;
+	while (i < state->window.height)
+		((t_color*)state->window.data)[i++ * state->window.width + rstate->x] = state->floor_color;
+
+}
+
+void	render_texture(t_state *state, t_render_state *rstate)
+{
+	int 	i;
+	double	step;
+	double	tex_pos;
+	int		tex_y;
+	int		tex_x;
+	t_image	*texture;
+
+	texture = get_tex(state, rstate);
+	tex_x = get_tex_x(state, rstate, texture);
+	step = 1.0 * texture->height / rstate->line_height;
+	tex_pos = (rstate->draw_start - state->window.height / 2 + rstate->line_height / 2) * step;
+	i = rstate->draw_start - 1;
+	while (++i < rstate->draw_end)
+	{
+		tex_y = (int)tex_pos & (texture->height - 1);
+		tex_pos += step;
+		((t_color*)state->window.data)[i * state->window.width + rstate->x] =
+			((t_color*)texture->data)[texture->height * tex_y + tex_x];
+	}
+}
diff --git a/src/render_state.c b/src/render_state.c
new file mode 100644
index 0000000..46fc7c5
--- /dev/null
+++ b/src/render_state.c
@@ -0,0 +1,205 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   render_state.c                                     :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: cacharle <marvin@42.fr>                    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2020/01/15 14:40:14 by cacharle          #+#    #+#             */
+/*   Updated: 2020/01/30 15:50:48 by cacharle         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "cub3d.h"
+
+/*
+** -1      0       1 <-- camera_x
+**  v      v       v
+**  ################
+**  #      |       # <-- screen
+**  #      |       #
+**  ################
+**
+** camera_x is the x column from the camera percpective
+** scaling the plane vector and adding it to the direction vector
+** to create a vector in the *direction* of the column x.
+*/
+
+void	rstate_ray(t_state *state, t_render_state *rstate)
+{
+	double camera_x;
+
+	camera_x = 2.0 * (double)rstate->x / (double)state->window.width - 1.0;
+	rstate->ray = vector_add(state->dir, vector_scale(state->plane, camera_x));
+}
+
+/*
+** delta between each grid unit form the vector percpective
+**
+** if we have a vector v = [2 3]:
+** dx = |v| / v_1
+**    = sqrt(v_1^2 + v_2^2) / v_1
+**    = (v_1^2 + v_2^2) / v_1^2
+**    = 1 + v_2^2 / v_1^2
+** Same thing for dy
+** dy = |v| / v_2
+**    = sqrt(v_1^2 + v_2^2) / v_1
+**    = (v_1^2 + v_2^2) / v_2^2
+**    = v_1^2 / v_2^2 + 1
+**
+** This can be simplified (for some obscure reason):
+** dx = |1 / v_1|
+** dy = |1 / v_2|
+*/
+
+void	rstate_delta(t_render_state *rstate)
+{
+	rstate->delta.x = fabs(1 / rstate->ray.x); //vector_norm(rstate->ray) / rstate->ray.x;
+	rstate->delta.y = fabs(1 / rstate->ray.y); // vector_norm(rstate->ray) / rstate->ray.y;
+}
+
+/*
+** first delta between player position and first grid unit
+**
+** current x and y are the perpendicular distance to the nearest wall,
+** we multiply them by their corresponding delta.
+** 0 <= perpendicular distance <= 1 is a ratio, how much of the full delta we need to take.
+**
+** if (rstate->ray.x < 0)
+**     rstate->probe.x = state->pos.x - rstate->map_pos.x;
+** else
+**     rstate->probe.x = fabs(state->pos.x - rstate->map_pos.x + 1.0);
+** if (rstate->ray.y < 0)
+**     rstate->probe.y = state->pos.y - rstate->map_pos.y;
+** else
+**     rstate->probe.y = fabs(state->pos.y - rstate->map_pos.y + 1.0);
+** rstate->probe.x *= rstate->delta.x;
+** rstate->probe.y *= rstate->delta.y;
+*/
+
+void	rstate_init_probe(t_state *state, t_render_state *rstate)
+{
+	if (rstate->ray.x < 0)
+		rstate->probe.x = (state->pos.x - rstate->map_pos.x) * rstate->delta.x;
+	else
+		rstate->probe.x = (rstate->map_pos.x + 1.0 - state->pos.x) * rstate->delta.x;
+	if (rstate->ray.y < 0)
+		rstate->probe.y = (state->pos.y - rstate->map_pos.y) * rstate->delta.y;
+	else
+		rstate->probe.y = (rstate->map_pos.y + 1.0 - state->pos.y) * rstate->delta.y;
+	/* rstate->probe = VECTOR_SUB(state->pos, rstate->map_pos); */
+	/* if (rstate->ray.x > 0) */
+	/* 	rstate->probe.x += 1.0; */
+	/* if (rstate->ray.y > 0) */
+	/* 	rstate->probe.y += 1.0; */
+	/* rstate->probe.x *= rstate->delta.x; */
+	/* rstate->probe.y *= rstate->delta.y; */
+}
+
+/*
+** Move the probe to it's next iteration by advancing to the nearest square unit
+** in the x or y direction.
+** This advance is represented both with the
+** player/ray percpective and the map pecpective.
+*/
+
+void	rstate_next_probe(t_render_state *rstate)
+{
+	if (rstate->probe.x < rstate->probe.y)
+	{
+		rstate->probe.x += rstate->delta.x;
+		rstate->map_pos.x += rstate->map_step.x;
+	}
+	else
+	{
+		rstate->probe.y += rstate->delta.y;
+		rstate->map_pos.y += rstate->map_step.y;
+	}
+}
+
+/*
+** perpendicular distance between the wall hit and the camera plane.
+** We don't use euclidean distance because it would cause a fisheye effect.
+**
+** ====================X========== wall
+**         |          /|
+**         | <------ / | -----+
+**         |        /  |      |
+**   plane |       /   | <- perpendicular distance
+**    |    |      /    |
+**    v    |     /     |
+** <-------^----/----------------- camera plane
+**         |   /
+**  dir -> |  /
+**         | / <- euclidean distance
+**         |/
+**         x <- pos
+**
+** In this case the perpendicular distance (p) is the difference
+** of the y-coord of the hit point and the y-coord of the pos + dir vector.
+** We use the y component because we hit the wall
+** from a south/north percepective,
+** if we had hit it form west/east, we would use the x component instead.
+*/
+
+void	rstate_perp_dist(t_state *state, t_render_state *rstate)
+{
+	if (rstate->side == SIDE_WE)
+		rstate->perp_dist = (rstate->map_pos.x - state->pos.x + (1 - rstate->map_step.x) / 2) / rstate->ray.x;
+	else
+		rstate->perp_dist = (rstate->map_pos.y - state->pos.y + (1 - rstate->map_step.y) / 2) / rstate->ray.y;
+}
+
+/*
+** 0 <= 1 / perp_dist <= 1
+** height * (1 / perp_dist) is how much of the screen height do we take
+*/
+
+void	rstate_line_height(t_state *state, t_render_state *rstate)
+{
+	rstate->line_height = (int)((double)state->window.height / rstate->perp_dist);
+}
+
+t_image	*get_tex(t_state *state, t_render_state *rstate)
+{
+	if (rstate->side == SIDE_NS)
+	{
+		if (rstate->probe.y < state->pos.y)
+			return (state->textures + TEX_NORTH);
+		else
+			return (state->textures + TEX_SOUTH);
+	}
+	else if (rstate->side == SIDE_WE)
+	{
+		if (rstate->probe.x > state->pos.x)
+			return (state->textures + TEX_WEST);
+		else
+			return (state->textures + TEX_EAST);
+	}
+	return (NULL);
+}
+
+/*
+** Since we're drawing each column, all the texels we want to draw on the window
+** are on a single column of the texture.
+** First we find the x-coord relative to the wall we hit
+*/
+
+int			get_tex_x(t_state *state, t_render_state *rstate, t_image *texture)
+{
+	int		tex_x;
+	double	wall_x;
+
+	if (rstate->side == SIDE_WE)
+		wall_x = state->pos.y + rstate->perp_dist * rstate->ray.y;
+	else
+		wall_x = state->pos.x + rstate->perp_dist * rstate->ray.x;
+	wall_x -= floor(wall_x);
+
+	tex_x = (int)(wall_x * (double)texture->width);
+	if (rstate->side == 0 && rstate->ray.x > 0)
+		tex_x = texture->width - tex_x - 1;
+	if (rstate->side == 1 && rstate->ray.y < 0)
+		tex_x = texture->width - tex_x - 1;
+	return (tex_x);
+}
diff --git a/src/state.c b/src/state.c
new file mode 100644
index 0000000..11e1c65
--- /dev/null
+++ b/src/state.c
@@ -0,0 +1,128 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   graphics.c                                         :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: cacharle <marvin@42.fr>                    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2019/11/19 16:39:57 by cacharle          #+#    #+#             */
+/*   Updated: 2020/01/30 15:13:42 by cacharle         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "cub3d.h"
+
+/*
+** Initialize the state attributes that weren't already filled by the parsing
+*/
+
+t_state	*state_new(t_state *state)
+{
+	int	i;
+
+	state->running = TRUE;
+	if ((state->mlx_ptr = mlx_init()) == NULL)
+		return (state_destroy(state));
+	if ((state->window_ptr = mlx_new_window(state->mlx_ptr,
+			state->window.width, state->window.height, WINDOW_TITLE)) == NULL)
+		return (state_destroy(state));
+	printf("init mlx and mlx window\n");
+	i = -1;
+	while (++i < TEXTURES_NUM)
+	{
+		load_texture(state->mlx_ptr, &state->textures[i],
+				state->textures_path[i]);
+		if (state->textures[i].id == NULL)
+			return (error_put_return_state_destroy("load texture", state));
+	}
+	if ((state->window.id = mlx_new_image(state->mlx_ptr,
+			state->window.width, state->window.height)) == NULL)
+		return (state_destroy(state));
+	state->window.data = mlx_get_data_addr(state->window.id,
+			&state->window.depth, &state->window.size_line,
+			&state->window.endian);
+	printf("init mlx window image\n");
+	state_init_player(state);
+	printf("init player\n");
+	return (state);
+}
+
+void	state_init_player(t_state *state)
+{
+	int	i;
+	int j;
+
+	i = -1;
+	while (++i < state->map_height)
+	{
+		j = -1;
+		while (++j < state->map_width)
+			if (helper_is_player_cell(state->map[i][j]))
+			{
+				state->pos.x = (double)j + 0.5;
+				state->pos.y = (double)i + 0.5;
+			}
+	}
+	helper_init_dir_plane(state, (int)state->pos.y, (int)state->pos.x);
+}
+
+t_state	*state_new_empty(void)
+{
+	int		i;
+	t_state	*state;
+
+	if ((state = (t_state*)malloc(sizeof(t_state))) == NULL)
+		return (NULL);
+	state->mlx_ptr = NULL;
+	state->window_ptr = NULL;
+	i = -1;
+	while (++i < TEXTURES_NUM)
+	{
+		state->textures_path[i] = NULL;
+		state->textures[i].id = NULL;
+	}
+	state->dir.x = 0.0;
+	state->dir.y = 0.0;
+	state->map = NULL;
+	state->ceilling_color.hexcode = 0x0;
+	state->floor_color.hexcode = 0x0;
+	return (state);
+}
+
+void	*state_destroy(t_state *state)
+{
+	int	i;
+
+	if (state == NULL)
+		return (NULL);
+	i = -1;
+	while (++i < TEXTURES_NUM)
+	{
+		free(state->textures_path[i]);
+		if (state->mlx_ptr != NULL && state->textures[i].id != NULL)
+			mlx_destroy_image(state->mlx_ptr, state->textures[i].id);
+	}
+	printf("free window image\n");
+	if (state->mlx_ptr != NULL && state->window.id != NULL)
+		mlx_destroy_image(state->mlx_ptr, state->window.id);
+	printf("free window\n");
+	if (state->mlx_ptr && state->window_ptr)
+		mlx_destroy_window(state->mlx_ptr, state->window_ptr);
+	printf("free map\n");
+	if (state->map != NULL)
+		while (state->map_height-- > 0 && state->map[state->map_height] != NULL)
+			free(state->map[state->map_height]);
+	free(state->map);
+	printf("free state\n");
+	free(state);
+	return (NULL);
+}
+
+void	load_texture(void *mlx_ptr, t_image *image, char *path)
+{
+	if ((image->id = mlx_xpm_file_to_image(
+			mlx_ptr, path, &image->width, &image->height)) == NULL)
+		return ;
+	image->data = mlx_get_data_addr(image->id, &image->depth,
+									&image->size_line, &image->endian);
+}
diff --git a/src/vector.c b/src/vector.c
new file mode 100644
index 0000000..44f784b
--- /dev/null
+++ b/src/vector.c
@@ -0,0 +1,62 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   linear_algebra.c                                   :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: cacharle <marvin@42.fr>                    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2019/11/18 01:28:01 by cacharle          #+#    #+#             */
+/*   Updated: 2020/01/16 08:43:09 by cacharle         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "cub3d.h"
+
+t_vector	vector_add(t_vector a, t_vector b)
+{
+	a.x += b.x;
+	a.y += b.y;
+	return (a);
+}
+
+t_vector	vector_scale(t_vector v, double scalar)
+{
+	v.x *= scalar;
+	v.y *= scalar;
+	return (v);
+}
+
+/*
+** rotate counter clockwise
+*/
+
+t_vector	vector_rotate(t_vector v, double angle)
+{
+	t_vector rotated;
+
+	rotated.x = cos(angle) * v.x - sin(angle) * v.y;
+	rotated.y = sin(angle) * v.x + cos(angle) * v.y;
+	return (rotated);
+}
+
+double		vector_norm(t_vector v)
+{
+	/* return (sqrt(SQUARE(v.x) + SQUARE(v.y))); */
+	return (hypot(v.x, v.y));
+}
+
+t_vector	vector_new(double x, double y)
+{
+	t_vector	v;
+
+	v.x = x;
+	v.y = y;
+	return (v);
+}
+
+t_vector	vector_apply(t_vector v, double (*f)(double))
+{
+	v.x = f(v.x);
+	v.y = f(v.y);
+	return (v);
+}