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https://codeberg.org/ACME-Corporation/cub3d.git
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68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
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/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* render.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: tchampio <tchampio@student.42lehavre.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2025/07/30 12:50:10 by tchampio #+# #+# */
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/* Updated: 2025/07/30 16:22:42 by tchampio ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "../cub3d_data.h"
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#include "../consts.h"
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#include "ray.h"
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int get_cardinal(t_ray *ray)
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{
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if (ray->side == 0)
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{
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if (ray->dir_x < 0)
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return (2);
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else
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return (3);
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}
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else
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{
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if (ray->dir_y > 0)
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return (1);
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else
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return (0);
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}
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}
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/*
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* Dir values are:
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* 0: North
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* 1: South
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* 2: West
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* 3: East
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*/
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void render_walls(t_cub3d_data *data, t_ray *ray, int x)
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{
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int dir;
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int tex_x;
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unsigned int color;
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double step;
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double pos;
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static int texture_size = 64; // to be changed in favor of a const
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dir = get_cardinal(ray);
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tex_x = (int)(ray->wall_x * texture_size);
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if ((ray->side == 0 && ray->dir_x < 0) || (ray->side == 1 && ray->dir_y > 0))
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tex_x = texture_size - tex_x - 1;
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step = 1.0 * texture_size / ray->wall_height;
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pos = (ray->draw_start - HEIGHT / 2 + ray->wall_height / 2) * step;
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while (ray->draw_start < ray->draw_end)
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{
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pos += step;
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color = 0x0000ff;
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(void)dir; // cc complains otherwise
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(void)pos; // cc complains otherwise
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data->screen_matrix[ray->draw_start][x] = color;
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ray->draw_start++;
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}
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}
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