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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_raycasting.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: rbousset <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/02/14 17:22:57 by rbousset #+# #+# */
/* Updated: 2020/02/14 17:23:42 by rbousset ### ########lyon.fr */
/* */
/* ************************************************************************** */
#include <libft.h>
#include <cub3d.h>
#include <stdint.h>
#include <stdlib.h>
#include <math.h>
#include <pthread.h>
static void
ft_calc_tex(t_cub *cl)
{
if (cl->rlist.side == 0)
cl->rlist.wall_hit_x = (cl->plist.pos_x) +
cl->rlist.wall_dist * cl->rlist.y_ray_dir;
else
cl->rlist.wall_hit_x = (cl->plist.pos_y) +
cl->rlist.wall_dist * cl->rlist.x_ray_dir;
cl->rlist.wall_hit_x -= floor(cl->rlist.wall_hit_x);
cl->tlist[cl->w_side].tex_x = (int)(cl->rlist.wall_hit_x *
(double)cl->tlist[cl->w_side].img_w);
if (cl->rlist.side == 0 && cl->rlist.x_ray_dir > 0)
cl->tlist[cl->w_side].tex_x = cl->tlist[cl->w_side].img_w
- cl->tlist[cl->w_side].tex_x - 1;
else if (cl->rlist.side == 1 && cl->rlist.y_ray_dir < 0)
cl->tlist[cl->w_side].tex_x = cl->tlist[cl->w_side].img_w
- cl->tlist[cl->w_side].tex_x - 1;
}
static void
ft_initray(uint16_t i, t_cub *cl)
{
t_win *wl;
t_player *pl;
wl = &cl->wlist;
pl = &cl->plist;
pl->cam_x = 2 * i / (float)(wl->x_size) - 1;
cl->rlist.x_ray_pos = pl->pos_y;
cl->rlist.y_ray_pos = pl->pos_x;
cl->rlist.x_ray_dir = pl->dir_x + pl->plane_x *
pl->cam_x;
cl->rlist.y_ray_dir = pl->dir_y + pl->plane_y *
pl->cam_x;
cl->rlist.sqx = (int16_t)cl->rlist.x_ray_pos;
cl->rlist.sqy = (int16_t)cl->rlist.y_ray_pos;
ft_detect(cl);
if (cl->rlist.side == 0)
{
cl->rlist.wall_dist = (cl->rlist.sqx - cl->rlist.x_ray_pos +
(1 - cl->mlist.x_step) / 2) / cl->rlist.x_ray_dir;
}
else
{
cl->rlist.wall_dist = (cl->rlist.sqy - cl->rlist.y_ray_pos +
(1 - cl->mlist.y_step) / 2) / cl->rlist.y_ray_dir;
}
}
static void
ft_castray_loop(uint16_t i, t_win *wl, t_cub *cl)
{
ft_initray(i, cl);
cl->rlist.line_h = (int16_t)(wl->y_size / cl->rlist.wall_dist);
cl->rlist.wall_t = -cl->rlist.line_h / 2 + wl->y_size / 2;
if (cl->rlist.wall_t < 0)
cl->rlist.wall_t = 0;
cl->rlist.wall_b = cl->rlist.line_h / 2 + wl->y_size / 2;
if (cl->rlist.wall_b >= (int16_t)wl->y_size)
cl->rlist.wall_b = wl->y_size - 1;
ft_choose_tex(i, cl);
ft_calc_tex(cl);
cl->rlist.tex_x_tab[i] = cl->tlist[cl->w_side].tex_x;
cl->rlist.line_h_tab[i] = cl->rlist.line_h;
cl->rlist.wall_t_tab[i] = cl->rlist.wall_t;
cl->rlist.wall_bz[i] = cl->rlist.wall_b;
cl->rlist.wall_dist_tab[i] = cl->rlist.wall_dist;
}
static void
ft_set_fc_tex_xy(uint8_t tid, uint16_t x, uint16_t y, t_cub *cl)
{
const int32_t x_cell = (int32_t)(cl->rlist.x_floor);
const int32_t y_cell = (int32_t)(cl->rlist.y_floor);
cl->tlist[tid].tex_x = (int32_t)(cl->tlist[tid].img_h
* (cl->rlist.y_floor - y_cell));
cl->tlist[tid].tex_y = (int32_t)(cl->tlist[tid].img_w
* (cl->rlist.x_floor - x_cell));
cl->rlist.fc_tex_x_tab[tid - 6][y][x] = cl->tlist[tid].tex_x;
cl->rlist.fc_tex_y_tab[tid - 6][y][x] = cl->tlist[tid].tex_y;
}
void
ft_castray(t_cub *cl)
{
pthread_t tid[2];
uint16_t y;
uint16_t x;
if (!(cl->rlist.wall_dist_tab = (float*)malloc(cl->wlist.x_size *
sizeof(float))) ||
!(cl->rlist.wall_bz = (int16_t*)malloc(cl->wlist.x_size *
sizeof(int16_t))) ||
!(cl->rlist.w_side_tab = (uint8_t*)malloc(cl->wlist.x_size *
sizeof(uint8_t))) ||
!(cl->rlist.line_h_tab = (uint16_t*)malloc(cl->wlist.x_size *
sizeof(uint16_t))) ||
!(cl->rlist.wall_t_tab = (int16_t*)malloc(cl->wlist.x_size *
sizeof(int16_t))) ||
!(cl->rlist.tex_x_tab = (int32_t*)malloc(cl->wlist.x_size *
sizeof(int32_t))) ||
!(cl->rlist.fc_tex_x_tab = (int32_t***)malloc(2 * sizeof(int32_t**))) ||
!(cl->rlist.fc_tex_y_tab = (int32_t***)malloc(2 * sizeof(int32_t**))) ||
!(cl->rlist.row_dist_tab = (float*)malloc(cl->wlist.y_size *
sizeof(float))))
ft_error(FT_RET_ALLOC_ERR, FT_ERR_ALLOCATE, cl);
x = 0;
while (x < 2)
{
if (!(cl->rlist.fc_tex_x_tab[x] = (int**)malloc(cl->wlist.y_size *
sizeof(int*))) ||
!(cl->rlist.fc_tex_y_tab[x] = (int**)malloc(cl->wlist.y_size *
sizeof(int*))))
ft_error(FT_RET_ALLOC_ERR, FT_ERR_ALLOCATE, cl);
y = 0;
while (y < cl->wlist.y_size)
{
if (!(cl->rlist.fc_tex_x_tab[x][y] = (int*)malloc(cl->wlist.x_size *
sizeof(int))) ||
!(cl->rlist.fc_tex_y_tab[x][y] = (int*)malloc(cl->wlist.x_size *
sizeof(int))))
ft_error(FT_RET_ALLOC_ERR, FT_ERR_ALLOCATE, cl);
y++;
}
x++;
}
x = 0;
while (x < cl->wlist.x_size)
{
ft_castray_loop(x, &cl->wlist, cl);
x++;
}
y = cl->wlist.y_size / 2;
while (y < cl->wlist.y_size)
{
x = 0;
ft_floor_cast_inits(y, &cl->rlist, cl);
while (x < cl->wlist.x_size)
{
if (cl->rlist.wall_bz[x] <= y)
{
if (cl->mlist.isftex)
ft_set_fc_tex_xy(6, x, y, cl);
if (cl->mlist.isctex && !cl->mlist.isskybox)
ft_set_fc_tex_xy(7, x, cl->wlist.y_size - y - 1, cl);
}
cl->rlist.x_floor += cl->mlist.x_floor_step;
cl->rlist.y_floor += cl->mlist.y_floor_step;
x++;
}
cl->rlist.row_dist_tab[y] = cl->rlist.row_dist;
cl->rlist.row_dist_tab[cl->wlist.y_size - y] = cl->rlist.row_dist;
y++;
}
pthread_create(&tid[0], 0x0, ft_wall_cast, (void*)cl);
pthread_create(&tid[1], 0x0, ft_floor_cast, (void*)cl);
pthread_join(tid[0], 0x0);
pthread_join(tid[1], 0x0);
x = 0;
y = 0;
while (x < 2)
{
while (y < cl->wlist.y_size)
{
free(cl->rlist.fc_tex_x_tab[x][y]);
free(cl->rlist.fc_tex_y_tab[x][y]);
y++;
}
free(cl->rlist.fc_tex_x_tab[x]);
free(cl->rlist.fc_tex_y_tab[x]);
x++;
}
free(cl->rlist.fc_tex_x_tab);
free(cl->rlist.fc_tex_y_tab);
ft_memdel((void*)&cl->rlist.tex_x_tab);
ft_memdel((void*)&cl->rlist.row_dist_tab);
ft_memdel((void*)&cl->rlist.wall_t_tab);
ft_memdel((void*)&cl->rlist.w_side_tab);
ft_memdel((void*)&cl->rlist.line_h_tab);
ft_memdel((void*)&cl->rlist.wall_bz);
ft_calc_sprite(cl);
ft_calc_heal(cl);
ft_calc_trap(cl);
ft_calc_weaps(cl);
if (cl->plist.handles_weapon > -1)
ft_draw_handweap(cl);
ft_memdel((void*)&cl->rlist.wall_dist_tab);
}
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