/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   render2.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: grobledo <grobledo@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/10/24 14:26:22 by grobledo          #+#    #+#             */
/*   Updated: 2024/10/24 14:27:37 by grobledo         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "algo.h"

void	ft_init_texture(const double perpwalldist, t_ray *ray, t_tex *tex)
{
	if (ray->side == 0 && ray->dir.x < 0)
		tex->tex_dir = 0;
	if (ray->side == 0 && ray->dir.x >= 0)
		tex->tex_dir = 1;
	if (ray->side == 1 && ray->dir.y < 0)
		tex->tex_dir = 2;
	if (ray->side == 1 && ray->dir.y >= 0)
		tex->tex_dir = 3;
	if (ray->side == 0)
		ray->wallx = g_map.player.pos.y + perpwalldist \
						* ray->dir.y;
	else
		ray->wallx = g_map.player.pos.x + perpwalldist \
						* ray->dir.x;
	ray->wallx -= floor((ray->wallx));
}

void	draw_wall(t_tex *tex, t_ray *ray, const int line_height, int x,
			int y, u_int32_t *img_data)
{
	u_int32_t	color;
	u_int32_t	*texture_data;

	tex->tex_y = ((y - (-line_height / 2 + SCREEN_HEIGHT / 2)) \
		* tex->tex_height) / line_height;
	tex->tex_x = (int)(ray->wallx * (double)tex->tex_width);
	if (ray->side == 0 && ray->dir.x > 0)
		tex->tex_x = tex->tex_width - tex->tex_x - 1;
	if (ray->side == 1 && ray->dir.y < 0)
		tex->tex_x = tex->tex_height - tex->tex_x - 1;
	texture_data = (u_int32_t *)mlx_get_data_addr(tex->textures[tex->tex_dir],
			&tex->bpp, &tex->size_line, &tex->endian);
	color = texture_data[tex->tex_x * tex->tex_width + tex->tex_y];
	img_data[y * SCREEN_WIDTH + x] = color;
}