diff -r 24b0f47f619c -r 4df350dac84f src/context.c
--- a/src/context.c	Sun Jan 25 13:18:26 2026 +0100
+++ b/src/context.c	Sun Jan 25 13:49:49 2026 +0100
@@ -34,6 +34,7 @@
 #include <GL/glew.h>
 
 #include <time.h>
+#include <assert.h>
 
 AscContext asc_context;
 
@@ -119,13 +120,29 @@
     }
 }
 
+static AscWindow * asc_window_find(Uint32 sdl_id) {
+    for (unsigned i = 0 ; i < ASC_MAX_WINDOWS ; i++) {
+        if (asc_context.windows[i].id == sdl_id) {
+            return asc_context.windows + i;
+        }
+    }
+    return NULL;
+}
+
 static void asc_event_window_resized(Uint32 id, Sint32 width, Sint32 height) {
-    unsigned int i = asc_window_index(id);
-    if (i < ASC_MAX_WINDOWS) {
-        asc_context.windows[i].resized = true;
-        asc_context.windows[i].dimensions.width = (unsigned) width;
-        asc_context.windows[i].dimensions.height = (unsigned) height;
-    }
+    AscWindow *window = asc_window_find(id);
+    assert(window != NULL);
+    window->resized = true;
+    window->rect.size.width = (unsigned) width;
+    window->rect.size.height = (unsigned) height;
+}
+
+static void asc_event_window_moved(Uint32 id, Sint32 x, Sint32 y) {
+    AscWindow *window = asc_window_find(id);
+    assert(window != NULL);
+    window->moved = true;
+    window->rect.pos.x = x;
+    window->rect.pos.y = y;
 }
 
 bool asc_loop_next(void) {
@@ -145,6 +162,14 @@
             case SDL_EVENT_QUIT:
                 asc_set_flag(asc_context.flags, ASC_FLAG_QUIT);
                 break;
+            case SDL_EVENT_WINDOW_MOVED: {
+                asc_event_window_moved(
+                        event.window.windowID,
+                        event.window.data1,
+                        event.window.data2
+                );
+                break;
+            }
             case SDL_EVENT_WINDOW_RESIZED: {
                 asc_event_window_resized(
                         event.window.windowID,
@@ -154,13 +179,11 @@
                 break;
             }
             case SDL_EVENT_WINDOW_FOCUS_GAINED: {
-                unsigned int idx = asc_window_index(event.window.windowID);
-                asc_context.windows[idx].focused = true;
+                asc_window_find(event.window.windowID)->focused = true;
                 break;
             }
             case SDL_EVENT_WINDOW_FOCUS_LOST: {
-                unsigned int idx = asc_window_index(event.window.windowID);
-                asc_context.windows[idx].focused = false;
+                asc_window_find(event.window.windowID)->focused = false;
                 break;
             }
             case SDL_EVENT_MOUSE_MOTION: {