Hide the part of the map that cannot be seen from the player's point of view.

1 files changed, 37 insertions, 1 deletions

diff --git a/src/game/entry.c b/src/game/entry.c
index 50cf78c..067cc6c 100644
--- a/src/game/entry.c
+++ b/src/game/entry.c
@@ -1,6 +1,7 @@
 #include "entry.h"
 #include "game.h"
 #include <stdlib.h>
+#include <stdbool.h>
 #include <string.h>
 #include <ncurses.h>
 #include "utilities.h"
@@ -44,6 +45,37 @@ static void mv_draw_block(int y, int x, struct block *block)
     }
 }
 
+bool visible(struct maze* maze, struct point player, int x, int y)
+{
+    if (player.x == x && player.y == y)
+        return true;
+    else if (player.x == x)
+    {
+        int step = player.y - y >= 0 ? -1 : 1;
+        for (int i = player.y + step; i != y; i += step)
+            if (maze->map[x][i])
+                return false;
+        return true;
+    }
+    else if (player.y == y)
+    {
+        int step = player.x - x >= 0 ? -1 : 1;
+        for (int i = player.x + step; i != x; i += step)
+            if (maze->map[i][y])
+                return false;
+        return true;
+    }
+    else if (player.y == y - 1)
+        return visible(maze, player, x, y - 1);
+    else if (player.y == y + 1)
+        return visible(maze, player, x, y + 1);
+    else if (player.x == x - 1)
+        return visible(maze, player, x - 1, y);
+    else if (player.x == x + 1)
+        return visible(maze, player, x + 1, y);
+    return false;
+}
+
 void draw_maze(struct maze_display *maze_draw, struct game_blocks *blocks)
 {
     int width = getmaxx(stdscr);
@@ -66,7 +98,11 @@ void draw_maze(struct maze_display *maze_draw, struct game_blocks *blocks)
                 if (real_x >= 0 && real_x < width)
                 {
                     path_sign = maze_draw->signs[x][y];
-                    if (path_sign == RS_NONE || (path_sign == RS_PATH && !maze_draw->display_player_path)) //Maze
+                    if (!visible(maze_draw->maze, maze_draw->player_pos, x, y))
+                    {
+                        darw_block(&(blocks->hidden));
+                    }
+                    else if (path_sign == RS_NONE || (path_sign == RS_PATH && !maze_draw->display_player_path)) //Maze
                     {
                         if (maze_draw->maze->map[x][y])
                             darw_block(&(blocks->wall));