From bc34ea6faab5bed6d2a7ef1293d1ad8f869306e0 Mon Sep 17 00:00:00 2001
From: blueloveTH <blueloveth@foxmail.com>
Date: Wed, 27 Mar 2024 21:55:50 +0800
Subject: [PATCH] Update rcore_ios.c

---
 src/platforms/rcore_ios.c | 38 ++++++++++++++++++++++++++++----------
 1 file changed, 28 insertions(+), 10 deletions(-)

diff --git a/src/platforms/rcore_ios.c b/src/platforms/rcore_ios.c
index e09ee6354..24598c964 100644
--- a/src/platforms/rcore_ios.c
+++ b/src/platforms/rcore_ios.c
@@ -73,7 +73,7 @@ extern void ios_destroy();
 //----------------------------------------------------------------------------------
 typedef struct {
     GameViewController *viewController;  // Root view controller
-
+    
     // Display data
     EGLDisplay device;                  // Native display device (physical screen connection)
     EGLSurface surface;                 // Surface to draw on, framebuffers (connected to context)
@@ -91,6 +91,33 @@ static PlatformData platform = { 0 };   // Platform specific data
 //----------------------------------------------------------------------------------
 // Module Internal Functions Declaration
 //----------------------------------------------------------------------------------
+static int map_point_id(UITouch *touch){
+    static UITouch* touchs[MAX_TOUCH_POINTS] = { 0 };
+    for(int i = 0; i < MAX_TOUCH_POINTS; i++){
+        if(touchs[i] == touch) return i + 1;
+    }
+    // clear unused touch pairs before insert
+    for(int i = 0; i < MAX_TOUCH_POINTS; i++){
+        if(touchs[i] == NULL) continue;
+        bool found = false;
+        for(int j = 0; j < MAX_TOUCH_POINTS; j++){
+            if(CORE.Input.Touch.pointId[j] == i + 1){
+                found = true;
+                break;
+            }
+        }
+        if(!found) touchs[i] = NULL;
+    }
+    for(int i = 0; i < MAX_TOUCH_POINTS; i++){
+        if(touchs[i] == NULL){
+            touchs[i] = touch;
+            return i + 1;
+        }
+    }
+    TRACELOG(LOG_ERROR, "Touch point id overflow. This may be a bug!");
+    return 0;
+}
+
 int InitPlatform(void);          // Initialize platform (graphics, inputs and more)
 
 //----------------------------------------------------------------------------------
@@ -644,15 +671,6 @@ void ClosePlatform(void)
     return false;
 }
 
-static int map_point_id(UITouch* touch){
-    int value = (int)(long long)touch;
-    // handle collisions
-    while(array_index_of(value, CORE.Input.Touch.pointId, MAX_TOUCH_POINTS) >= 0){
-        value++;
-    }
-    return value;
-}
-
 static void sync_all_touches(UIEvent* event)
 {
     CORE.Input.Touch.pointCount = (int)event.allTouches.count;