add support for Apple Pencil and build for iOS

PanoPainter/GameViewController.m

@@ -19,28 +19,98 @@
 - (void)tearDownGL;
 @end
 
+//std::map<
+int t_count = 0;
+
 @implementation GameViewController
 
+- (void)insertText:(NSString *)text
+{
+    if (const char* cstr = [text cStringUsingEncoding:NSASCIIStringEncoding])
+        App::I.key_char(cstr[0]);
+    NSLog(@"%@", text);
+    // Do something with the typed character
+}
+- (void)deleteBackward {
+    App::I.key_char('\b');
+    // Handle the delete key
+}
+- (BOOL)hasText {
+    // Return whether there's any text present
+    return YES;
+}
+- (BOOL)canBecomeFirstResponder {
+    return YES;
+}
+
 - (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
 {
     UITouch *touch = [[event allTouches] anyObject];
+
     CGPoint touchLocation = [touch locationInView:self.view];
     float scale = self.view.contentScaleFactor;
-    App::I.mouse_down(0, touchLocation.x * scale, touchLocation.y * scale);
+    
+    App::I.mouse_down(0, touchLocation.x * scale, touchLocation.y * scale, touch.force);
+    t_count = 1;
 }
 - (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
 {
-    UITouch *touch = [[event allTouches] anyObject];
-    CGPoint touchLocation = [touch locationInView:self.view];
+    NSUInteger n = [[event allTouches] count];
     float scale = self.view.contentScaleFactor;
-    App::I.mouse_move(touchLocation.x * scale, touchLocation.y * scale);
+    
+    UITouch* t0 = nullptr;
+    UITouch* t1 = nullptr;
+    
+    t0 = [[[event allTouches] allObjects] objectAtIndex:0];
+    CGPoint tl0 = [t0 locationInView:self.view];
+    glm::vec2 p0 = glm::vec2(tl0.x * scale, tl0.y * scale);
+    glm::vec2 p1;
+    if  (n > 1)
+    {
+        t1 = [[[event allTouches] allObjects] objectAtIndex:1];
+        CGPoint tl1 = [t1 locationInView:self.view];
+        p1 = glm::vec2(tl1.x * scale, tl1.y * scale);
+    }
+    
+    if (n == 2)
+    {
+        if (t_count == 1)
+        {
+            App::I.mouse_cancel(0);
+            App::I.gesture_start(p0, p1);
+        }
+        else
+            App::I.gesture_move(p0, p1);
+        t_count = 2;
+    }
+    else if (n == 1)
+    {
+        UITouch *touch = [[event allTouches] anyObject];
+        CGPoint touchLocation = [touch locationInView:self.view];
+        //auto p = glm::vec2(touchLocation.x * scale, touchLocation.y * scale);
+        float force = touch.type == UITouchType::UITouchTypeStylus ? touch.force : 1.0f;
+        if (t_count == 2)
+        {
+            //App::I.gesture_end();
+            //App::I.mouse_down(0, touchLocation.x * scale, touchLocation.y * scale, force);
+        }
+        else
+        {
+            App::I.mouse_move(touchLocation.x * scale, touchLocation.y * scale, force);
+        }
+    }
 }
 -(void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
 {
     UITouch *touch = [[event allTouches] anyObject];
     CGPoint touchLocation = [touch locationInView:self.view];
     float scale = self.view.contentScaleFactor;
-    App::I.mouse_up(0, touchLocation.x * scale, touchLocation.y * scale);
+    
+    if (t_count == 2)
+        App::I.gesture_end();
+    else
+        App::I.mouse_up(0, touchLocation.x * scale, touchLocation.y * scale);
+    t_count = 0;
 }
 
 - (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator
@@ -49,11 +119,16 @@
                   size.height * self.view.contentScaleFactor);
 }
 
+- (void)viewDidAppear:(BOOL)animated
+{
+    [self resignFirstResponder];
+}
+
 - (void)viewDidLoad
 {
     [super viewDidLoad];
     App::I.initLog();
-
+    App::I.ios_view = self;
     
     self.context = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES3];