intra to gitea

2025-11-15 22:16:13 +00:00
parent 0c0d28ab36
commit 50b45e597f
27 changed files with 888 additions and 624 deletions
@@ -0,0 +1,97 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   raycast_utils.c                                   :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: jle-neze <[email protected]>                    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2025/10/29 18:20:00 by jle-neze          #+#    #+#             */
+/*   Updated: 2025/10/29 18:20:00 by jle-neze         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "cub.h"
+
+static void	draw_textured(t_game *g, t_texdraw d)
+{
+	double		wall_x;
+	int			tex_x;
+	double		step;
+	double		tex_pos;
+	t_texline	l;
+
+	if (d.r->side == 0)
+		wall_x = g->cam.pos_y + d.c.perp_dist * d.r->ray_dir_y;
+	else
+		wall_x = g->cam.pos_x + d.c.perp_dist * d.r->ray_dir_x;
+	wall_x -= floor(wall_x);
+	tex_x = (int)(wall_x * (double)d.t->w);
+	if ((d.r->side == 0 && d.r->ray_dir_x > 0)
+		|| (d.r->side == 1 && d.r->ray_dir_y < 0))
+		tex_x = d.t->w - tex_x - 1;
+	step = (double)d.t->h / (double)d.c.line_h;
+	tex_pos = (d.c.draw_start - g->gfx.h / 2 + d.c.line_h / 2) * step;
+	l.tex = d.t;
+	l.tex_x = tex_x;
+	l.step = step;
+	l.tex_pos = tex_pos;
+	l.y0 = d.c.draw_start;
+	l.y1 = d.c.draw_end;
+	draw_tex_vline(g, d.x, l);
+}
+
+static void	set_tex_id(t_ray *r)
+{
+	if (r->side == 0)
+	{
+		if (r->step_x < 0)
+			r->tex_id = 2;
+		else
+			r->tex_id = 3;
+	}
+	else
+	{
+		if (r->step_y < 0)
+			r->tex_id = 1;
+		else
+			r->tex_id = 0;
+	}
+}
+
+static void	draw_color_column(t_game *g, int x, t_ray *r, t_col c)
+{
+	t_vline	v;
+
+	v.y0 = c.draw_start;
+	v.y1 = c.draw_end;
+	v.color = g->colors.wall_nsew[r->tex_id];
+	if (r->side == 1)
+		v.color = (v.color & 0xFEFEFE) >> 1;
+	draw_vline(g, x, v);
+}
+
+void	draw_column(t_game *g, int x, t_ray *r)
+{
+	t_tex		*t;
+	t_col		c;
+	t_texdraw	d;
+
+	if (r->side == 0)
+		c.perp_dist = r->side_dist_x - r->delta_dist_x;
+	else
+		c.perp_dist = r->side_dist_y - r->delta_dist_y;
+	if (c.perp_dist < 1e-6)
+		c.perp_dist = 1e-6;
+	c.line_h = (int)(g->gfx.h / c.perp_dist);
+	c.draw_start = -c.line_h / 2 + g->gfx.h / 2;
+	c.draw_end = c.line_h / 2 + g->gfx.h / 2;
+	set_tex_id(r);
+	if (!g->has_tex)
+		return (draw_color_column(g, x, r, c));
+	t = &g->tex[r->tex_id];
+	d.x = x;
+	d.r = r;
+	d.t = t;
+	d.c = c;
+	draw_textured(g, d);
+}