/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_draw_sprite.c                                   :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: rbousset <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2020/02/24 20:22:45 by rbousset          #+#    #+#             */
/*   Updated: 2020/02/24 20:22:47 by rbousset         ###   ########lyon.fr   */
/*                                                                            */
/* ************************************************************************** */

#include <libft.h>
#include <cub3d.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>

void
	ft_draw_verline_sprite(t_cub *cl, int x, int y, int tex_y)
{
	if (cl->tlist[4].tex_x)
		cl->img.ptr[x * 4 + (cl->img.sizeline * y)] =
			(char)cl->tlist[4].ptr[cl->tlist[4].tex_x * 4 + 4 *
									cl->tlist[4].img_h * tex_y];
	cl->img.ptr[x * 4 + (cl->img.sizeline * y) + 1] =
			(char)cl->tlist[4].ptr[cl->tlist[4].tex_x * 4 + 4 *
									cl->tlist[4].img_h * tex_y + 1];
	cl->img.ptr[x * 4 + (cl->img.sizeline * y) + 2] =
			(char)cl->tlist[4].ptr[cl->tlist[4].tex_x * 4 + 4 *
									cl->tlist[4].img_h * tex_y + 2];
	cl->img.ptr[x * 4 + cl->wlist->x_size * y + 3] = (char)0;
}

void
	ft_draw_sprite(t_cub *cl, int x)
{
	int hor_it;
	int d;
	int tex_y;

	hor_it = cl->sp_list.s_start_y;
	while (hor_it < cl->sp_list.s_end_y)
	{
		d = hor_it * 256 - cl->wlist->y_size * 128 + cl->rlist.line_h * 128;
		d = (d <= 0) ? (-d) : (d);
		tex_y = ((d * cl->tlist[4].img_h) / cl->rlist.line_h) / 256;
		(tex_y < 0) ? (tex_y = 0) : 0;
		ft_draw_verline_sprite(cl, x, hor_it, tex_y);
		hor_it++;
	}
}