added swipe mode

assets/config.json

@@ -1,6 +1,6 @@
 {
 	"touchscreen": {
-		"mode": "joystick",
+		"mode": "swipe",
 		"deadzone": 10,
 		"buffer": false
 	},

src/js/main.js

@@ -177,4 +177,32 @@
 		});
 	}
 
+	if(config.touchscreen.mode=='swipe') {
+		let center={x: 0, y: 0};
+		window.center=center;
+		window.addEventListener('touchstart', e => {
+			center.x=e.touches[0].clientX;
+			center.y=e.touches[0].clientY;
+		});
+		window.addEventListener('touchmove', e => {
+			let x=e.touches[0].clientX-center.x;
+			let y=e.touches[0].clientY-center.y;
+			const angle=((Math.atan2(x, y)+2*Math.PI)%(2*Math.PI))/Math.PI;
+			const magnitude=Math.hypot(x, y);
+
+			let inputs=currentInputs;
+			if(magnitude>config.touchscreen.deadzone) {
+				if(angle>.25 && angle <.75) inputs.right=true;
+				else if(angle>.75 && angle<1.25) inputs.up=true;
+				else if(angle>1.25 && angle<1.75) inputs.left=true;
+				else inputs.down=true;
+
+				center.x=e.touches[0].clientX;
+				center.y=e.touches[0].clientY;
+			}
+
+			if(!config.touchscreen.buffer) inputs.clearBuffer=true;
+		});
+	}
+
 })();