From 9f9c0226d03c060c3c5b12b7a8d37d2e8b372a74 Mon Sep 17 00:00:00 2001
From: Xavier Del Campo Romero <xavi.dcr@tutanota.com>
Date: Tue, 8 Feb 2022 15:16:57 +0100
Subject: Refresh camera and terrain rendering on screen resize

---
 src/camera/inc/camera.h   |  4 ++++
 src/camera/src/camera.c   |  6 ++++++
 src/game/src/game.c       |  1 +
 src/terrain/inc/terrain.h |  3 ++-
 src/terrain/src/terrain.c | 23 +++++++++++++++++++----
 5 files changed, 32 insertions(+), 5 deletions(-)

(limited to 'src')

diff --git a/src/camera/inc/camera.h b/src/camera/inc/camera.h
index 1daebd2..151ea74 100644
--- a/src/camera/inc/camera.h
+++ b/src/camera/inc/camera.h
@@ -23,6 +23,10 @@ struct camera
             CURSOR_STATE_IDLE,
             CURSOR_STATE_PRESSED
         } state;
+        struct
+        {
+            int last_w, last_h;
+        } screen;
     } cursor;
 };
 
diff --git a/src/camera/src/camera.c b/src/camera/src/camera.c
index 4b046e1..5146108 100644
--- a/src/camera/src/camera.c
+++ b/src/camera/src/camera.c
@@ -45,6 +45,10 @@ static void cursor_update(struct camera *const cam, const struct pad *const p)
     struct cursor *const c = &cam->cursor;
     enum {STEP = 4};
 
+    if (c->screen.last_w != screen_w
+        || c->screen.last_h != screen_h)
+        cursor_init(c);
+
     if (pad_pressed(p, PAD_KEY_LEFT)
         && (c->x - STEP)
         && (!cam->x || c->x != c->x_init))
@@ -97,6 +101,8 @@ void cursor_init(struct cursor *const c)
 {
     c->x = c->x_init = (screen_w / 2) - CURSOR_WIDTH;
     c->y = c->y_init = (screen_h / 2) - CURSOR_HEIGHT;
+    c->screen.last_w = screen_w;
+    c->screen.last_h = screen_h;
 }
 
 static void update_speed(struct camera *const cam, const struct pad *const p)
diff --git a/src/game/src/game.c b/src/game/src/game.c
index 2f13a64..8907be9 100644
--- a/src/game/src/game.c
+++ b/src/game/src/game.c
@@ -79,6 +79,7 @@ int game(void)
                 };
 
                 exit |= human_player_update(&humans[i], &o);
+                terrain_update(&map);
 
                 if (terrain_render(&map, &h->cam)
                     || human_player_render(h, &o)
diff --git a/src/terrain/inc/terrain.h b/src/terrain/inc/terrain.h
index 9552555..d5f4e12 100644
--- a/src/terrain/inc/terrain.h
+++ b/src/terrain/inc/terrain.h
@@ -26,10 +26,11 @@ enum terrain_type
 struct terrain_map
 {
     enum terrain_type m[MAP_TILES][MAP_TILES];
-    int nx, ny;
+    int nx, ny, last_w, last_h;
 };
 
 void terrain_init(struct terrain_map *map);
+void terrain_update(struct terrain_map *map);
 int terrain_render(const struct terrain_map *map, const struct camera *cam);
 
 extern struct sprite grass_sprite;
diff --git a/src/terrain/src/terrain.c b/src/terrain/src/terrain.c
index 04df6e6..a528c10 100644
--- a/src/terrain/src/terrain.c
+++ b/src/terrain/src/terrain.c
@@ -7,6 +7,25 @@
 
 struct sprite grass_sprite;
 
+void terrain_update(struct terrain_map *const map)
+{
+    if (map->last_w != screen_w)
+    {
+        const int extra = !!(screen_w % TERRAIN_SZ);
+
+        map->nx = screen_w / TERRAIN_SZ + extra;
+        map->last_w = screen_w;
+    }
+
+    if (map->last_h != screen_h)
+    {
+        const int extra = !!(screen_h % TERRAIN_SZ);
+
+        map->ny = screen_h / TERRAIN_SZ + extra;
+        map->last_h = screen_h;
+    }
+}
+
 int terrain_render(const struct terrain_map *const map,
     const struct camera *const cam)
 {
@@ -59,9 +78,5 @@ int terrain_render(const struct terrain_map *const map,
 
 void terrain_init(struct terrain_map *const map)
 {
-    const int extra = !!(screen_w % TERRAIN_SZ);
-
     memset(map, 0, sizeof *map);
-    map->nx = screen_w / TERRAIN_SZ + extra;
-    map->ny = screen_h / TERRAIN_SZ + extra;
 }
-- 
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