src/ft_draw_verline.c


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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_draw_verline.c                                  :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: rbousset <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2020/02/14 17:22:23 by rbousset          #+#    #+#             */
/*   Updated: 2020/02/14 17:23:42 by rbousset         ###   ########lyon.fr   */
/*                                                                            */
/* ************************************************************************** */

#include <cub3d.h>
#include <stdint.h>

int8_t
	ft_draw_verline(t_cub *cl, int32_t x, int32_t y, int32_t y2)
{
	int32_t	d;
	int32_t tex_y;

	(y < 0) ? (y = 0) : 0;
	(y2 < 0) ? (y2 = 0) : 0;
	(cl->rlist.line_h <= 0) ? (cl->rlist.line_h = 1) : 0;
	while (y < y2)
	{
		d = y * 256 - cl->wlist.y_size * 128 + cl->rlist.line_h * 128;
		d = (d <= 0) ? (-d) : (d);
		tex_y = ((d * cl->tlist[cl->w_side].img_h) / cl->rlist.line_h) / 256;
		(tex_y <= 0) ? (tex_y = 1) : 0;
		ft_draw_texture(cl, x, y, tex_y);
		y++;
	}
	return (0);
}