set_wall_slice.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   set_wall_slice.c                                   :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: kamitsui <kamitsui@student.42tokyo.jp>     +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/08/26 22:34:03 by kamitsui          #+#    #+#             */
/*   Updated: 2024/12/20 17:49:19 by kamitsui         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */
 
#include "cub3d.h"
 
#define MIN_PERP_WALL_DIST 1e-4
void    set_wall_slice(t_frame *frame, int x)
{
    t_wall_slice    wall_slice;
    double          safe_perp_wall_dist;
 
    safe_perp_wall_dist = frame->dda.perp_wall_dist;
    if (frame->dda.perp_wall_dist < MIN_PERP_WALL_DIST)
        safe_perp_wall_dist = MIN_PERP_WALL_DIST;
    wall_slice.line_height = (int)(WIN_HEIGHT / safe_perp_wall_dist);
    wall_slice.draw_start = -wall_slice.line_height / 2 + IMG_3D_HEIGHT / 2;
    wall_slice.draw_end = wall_slice.line_height / 2 + IMG_3D_HEIGHT / 2;
    if (wall_slice.draw_start < 0)
        wall_slice.draw_start = 0;
    if (wall_slice.draw_end >= WIN_HEIGHT)
        wall_slice.draw_end = WIN_HEIGHT - 1;
    frame->wall_slice = wall_slice;
    (void)x;
}
    //debug_wall_slice(frame->debug.fd,
    //  frame->dda.perp_wall_dist, wall_slice, "set_wall_slice()");