From 3fb7b4274c88df2b99cd541ae6ea60c8b4a23885 Mon Sep 17 00:00:00 2001
From: Le Juez Victor <90587919+Bigfoot71@users.noreply.github.com>
Date: Fri, 13 Oct 2023 14:52:02 +0200
Subject: [PATCH] Fix `GetMouseDelta()` issue for Android

---
 src/rcore_android.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/rcore_android.c b/src/rcore_android.c
index 7cc71bbca806..5f6f34bab352 100644
--- a/src/rcore_android.c
+++ b/src/rcore_android.c
@@ -1178,6 +1178,16 @@ static int32_t AndroidInputCallback(struct android_app *app, AInputEvent *event)
     if (CORE.Input.Touch.pointCount > 0) CORE.Input.Touch.currentTouchState[MOUSE_BUTTON_LEFT] = 1;
     else CORE.Input.Touch.currentTouchState[MOUSE_BUTTON_LEFT] = 0;
 
+    // Stores the previous position of touch[0] only while it's active to calculate the delta.
+    if (flags == AMOTION_EVENT_ACTION_MOVE)
+    {
+        CORE.Input.Mouse.previousPosition = CORE.Input.Mouse.currentPosition;
+    }
+    else
+    {
+        CORE.Input.Mouse.previousPosition = CORE.Input.Touch.position[0];
+    }
+
     // Map touch[0] as mouse input for convenience
     CORE.Input.Mouse.currentPosition = CORE.Input.Touch.position[0];
     CORE.Input.Mouse.currentWheelMove = (Vector2){ 0.0f, 0.0f };