Get normed

1 files changed, 87 insertions, 0 deletions

diff --git a/src/ft_castray_loop.c b/src/ft_castray_loop.c
new file mode 100644
index 0000000..28277a7
--- /dev/null
+++ b/src/ft_castray_loop.c
@@ -0,0 +1,87 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_raycasting.c                                    :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: rbousset <marvin@42.fr>                    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2020/02/14 17:22:57 by rbousset          #+#    #+#             */
+/*   Updated: 2020/02/14 17:23:42 by rbousset         ###   ########lyon.fr   */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include <libft.h>
+#include <cub3d.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <math.h>
+
+void
+	ft_calc_tex(t_cub *cl)
+{
+	if (cl->rlist.side == 0)
+		cl->rlist.wall_hit_x = (cl->plist.pos_x) +
+			cl->rlist.wall_dist * cl->rlist.y_ray_dir;
+	else
+		cl->rlist.wall_hit_x = (cl->plist.pos_y) +
+			cl->rlist.wall_dist * cl->rlist.x_ray_dir;
+	cl->rlist.wall_hit_x -= floor(cl->rlist.wall_hit_x);
+	cl->tlist[cl->w_side].tex_x = (int)(cl->rlist.wall_hit_x *
+			(double)cl->tlist[cl->w_side].img_w);
+	if (cl->rlist.side == 0 && cl->rlist.x_ray_dir > 0)
+		cl->tlist[cl->w_side].tex_x = cl->tlist[cl->w_side].img_w
+			- cl->tlist[cl->w_side].tex_x - 1;
+	else if (cl->rlist.side == 1 && cl->rlist.y_ray_dir < 0)
+		cl->tlist[cl->w_side].tex_x = cl->tlist[cl->w_side].img_w
+			- cl->tlist[cl->w_side].tex_x - 1;
+}
+
+void
+	ft_initray(uint16_t i, t_cub *cl)
+{
+	t_win		*wl;
+	t_player	*pl;
+
+	wl = &cl->wlist;
+	pl = &cl->plist;
+	pl->cam_x = 2 * i / (float)(wl->x_size) - 1;
+	cl->rlist.x_ray_pos = pl->pos_y;
+	cl->rlist.y_ray_pos = pl->pos_x;
+	cl->rlist.x_ray_dir = pl->dir_x + pl->plane_x *
+		pl->cam_x;
+	cl->rlist.y_ray_dir = pl->dir_y + pl->plane_y *
+		pl->cam_x;
+	cl->rlist.sqx = (int16_t)cl->rlist.x_ray_pos;
+	cl->rlist.sqy = (int16_t)cl->rlist.y_ray_pos;
+	ft_detect(cl);
+	if (cl->rlist.side == 0)
+	{
+		cl->rlist.wall_dist = (cl->rlist.sqx - cl->rlist.x_ray_pos +
+		(1 - cl->mlist.x_step) / 2) / cl->rlist.x_ray_dir;
+	}
+	else
+	{
+		cl->rlist.wall_dist = (cl->rlist.sqy - cl->rlist.y_ray_pos +
+		(1 - cl->mlist.y_step) / 2) / cl->rlist.y_ray_dir;
+	}
+}
+
+void
+	ft_castray_loop(uint16_t i, t_win *wl, t_cub *cl)
+{
+	ft_initray(i, cl);
+	cl->rlist.line_h = (int16_t)(wl->y_size / cl->rlist.wall_dist);
+	cl->rlist.wall_t = -cl->rlist.line_h / 2 + wl->y_size / 2;
+	if (cl->rlist.wall_t < 0)
+		cl->rlist.wall_t = 0;
+	cl->rlist.wall_b = cl->rlist.line_h / 2 + wl->y_size / 2;
+	if (cl->rlist.wall_b >= (int16_t)wl->y_size)
+		cl->rlist.wall_b = wl->y_size - 1;
+	ft_choose_tex(i, cl);
+	ft_calc_tex(cl);
+	cl->rlist.tex_x_tab[i] = cl->tlist[cl->w_side].tex_x;
+	cl->rlist.line_h_tab[i] = cl->rlist.line_h;
+	cl->rlist.wall_t_tab[i] = cl->rlist.wall_t;
+	cl->rlist.wall_b_tab[i] = cl->rlist.wall_b;
+	cl->rlist.wall_dist_tab[i] = cl->rlist.wall_dist;
+}