106 lines
3.1 KiB
C
106 lines
3.1 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* frame_update.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: bgoulard <bgoulard@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2024/11/12 06:02:54 by bgoulard #+# #+# */
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/* Updated: 2024/12/16 14:51:46 by bgoulard ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "cub3d.h"
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#include "cub3d_struct.h"
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#include "mlx.h"
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#include "ft_string.h"
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#include <math.h>
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#include <unistd.h>
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void search_hit(t_dpoint delta_dist, t_ipoint *pos_i, t_ipoint step, \
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void *_data[3])
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{
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int *side;
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t_info *data;
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t_dpoint *side_dist;
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side = (int *)_data[1];
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data = (t_info *)_data[0];
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side_dist = (t_dpoint *)_data[2];
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while (true)
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{
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if (side_dist->x < side_dist->y)
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{
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side_dist->x += delta_dist.x;
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pos_i->x += step.x;
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*side = 0;
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}
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else
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{
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side_dist->y += delta_dist.y;
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pos_i->y += step.y;
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*side = 1;
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}
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if ((*c3_get_cell(data->map.map, data->map.size, *pos_i))
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.tile_type != EMPTY)
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return ;
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}
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}
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// t_dpoint prep_distoff ->
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// x - perpwall_dist
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// y - wall_off
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void column_handler(t_ipoint pos_i, t_dpoint ray_dir, t_info *data, int x)
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{
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t_dpoint side_dist;
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t_dpoint delta_dist;
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t_dpoint perp_distoff;
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t_ipoint step;
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int side;
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delta_dist = (t_dpoint){fabs(1 / ray_dir.x), fabs(1 / ray_dir.y)};
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set_step(&step, ray_dir);
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set_side_dist(&side_dist, (t_dpoint[]){ray_dir, data->player.pos, \
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delta_dist}, pos_i);
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search_hit(delta_dist, &pos_i, step, (void *[]){data, &side, &side_dist});
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if (side == 0)
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perp_distoff.x = (pos_i.x - data->player.pos.x + \
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(double)(1 - step.x) / 2) / ray_dir.x;
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else
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perp_distoff.x = (pos_i.y - data->player.pos.y + \
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(double)(1 - step.y) / 2) / ray_dir.y;
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perp_distoff.y = data->player.pos.x + perp_distoff.x * ray_dir.x;
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if (side == 0)
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perp_distoff.y = data->player.pos.y + perp_distoff.x * ray_dir.y;
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perp_distoff.y -= floor(perp_distoff.y);
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draw_((int []){side, x}, (double []){perp_distoff.x, perp_distoff.y}, \
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step, data);
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}
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int render_frame(t_info *data)
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{
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double camera_x;
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double coef;
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int x;
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x = 0;
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coef = 2 * tan(deg2rad(FOV) / 2) / (double)data->screen_size.x;
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ft_bzero(data->camera.img_addr, data->screen_size.x * data->screen_size.y \
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* (data->camera.bpp / 8));
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draw_bg(data);
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while (x < data->screen_size.x)
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{
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camera_x = x * coef - 1;
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column_handler(data->player.pos_i, (t_dpoint){\
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data->player.dir.x + data->player.plane.x * camera_x, \
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data->player.dir.y + data->player.plane.y * camera_x}, \
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data, x);
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x++;
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}
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mlx_put_image_to_window(data->mlx_ptr, data->win_ptr, \
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data->camera.screen_buff, 0, 0);
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return (0);
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}
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