1 files changed, 139 insertions, 0 deletions
diff --git a/td/Assets/Scripts/cameraHandler.cs b/td/Assets/Scripts/cameraHandler.cs
new file mode 100644
index 0000000..a4aa660
--- /dev/null
+++ b/td/Assets/Scripts/cameraHandler.cs
@@ -0,0 +1,139 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class cameraHandler : MonoBehaviour {
+
+	public float PanSpeed = 20f;
+	public float ZoomSpeedTouch = 0.1f;
+	public float ZoomSpeedMouse = .5f;
+
+	public static readonly float[] BoundsX = new float[]{-10f, 10f};
+	public static readonly float[] BoundsY = new float[]{-5f, 10f};
+	public static readonly float[] BoundsZ = new float[]{-8f, 8f};
+	public static readonly float[] ZoomBounds = new float[]{1f, 5f};
+
+	private Camera cam;
+
+	private bool panActive;
+	private Vector3 lastPanPosition;
+	private int panFingerId; // Touch mode only
+
+	private bool zoomActive;
+	private Vector2[] lastZoomPositions; // Touch mode only
+
+	void Awake() {
+		cam = GetComponent<Camera>();
+	}
+
+	void Update() {
+		// If there's an open menu, or the clicker is being pressed, ignore the touch.
+		/*
+		if (GameManager.Instance.MenuManager.HasOpenMenu || GameManager.Instance.BitSpawnManager.IsSpawningBits) {
+			return;
+		}*/
+
+		if (Input.touchSupported && Application.platform != RuntimePlatform.WebGLPlayer) {
+			HandleTouch();
+		} else {
+			//HandleMouse();
+		}
+		HandleTouch ();
+	}
+
+	void HandleTouch() {
+		switch(Input.touchCount) {
+
+		case 1: // Panning
+			zoomActive = false;
+
+			// If the touch began, capture its position and its finger ID.
+			// Otherwise, if the finger ID of the touch doesn't match, skip it.
+			Touch touch = Input.GetTouch(0);
+			if (touch.phase == TouchPhase.Began) {
+				lastPanPosition = touch.position;
+				panFingerId = touch.fingerId;
+				panActive = true;
+			} else if (touch.fingerId == panFingerId && touch.phase == TouchPhase.Moved) {
+				PanCamera(touch.position);
+			}
+			break;
+
+		case 2: // Zooming
+			panActive = false;
+
+			Vector2[] newPositions = new Vector2[]{Input.GetTouch(0).position, Input.GetTouch(1).position};
+			if (!zoomActive) {
+				lastZoomPositions = newPositions;
+				zoomActive = true;
+			} else {
+				// Zoom based on the distance between the new positions compared to the 
+				// distance between the previous positions.
+				float newDistance = Vector2.Distance(newPositions[0], newPositions[1]);
+				float oldDistance = Vector2.Distance(lastZoomPositions[0], lastZoomPositions[1]);
+				float offset = newDistance - oldDistance;
+
+				ZoomCamera(offset, ZoomSpeedTouch);
+
+				lastZoomPositions = newPositions;
+			}
+			break;
+
+		default:
+			panActive = false;
+			zoomActive = false;
+			break;
+		}
+	}
+
+	void HandleMouse() {
+		// On mouse down, capture it's position.
+		// On mouse up, disable panning.
+		// If there is no mouse being pressed, do nothing.
+		if (Input.GetMouseButtonDown(0)) {
+			panActive = true;
+			lastPanPosition = Input.mousePosition;
+		} else if (Input.GetMouseButtonUp(0)) {
+			panActive = false;
+		} else if (Input.GetMouseButton(0)) {
+			PanCamera(Input.mousePosition);
+		}
+
+		// Check for scrolling to zoom the camera
+		float scroll = Input.GetAxis("Mouse ScrollWheel");
+		zoomActive = true;
+		ZoomCamera(scroll, ZoomSpeedMouse);
+		zoomActive = false;
+	}
+
+	void ZoomCamera(float offset, float speed) {
+		if (!zoomActive || offset == 0) {
+			return;
+		}
+
+		cam.orthographicSize = Mathf.Clamp(cam.orthographicSize - (offset * speed), ZoomBounds[0], ZoomBounds[1]);
+	}
+
+	void PanCamera(Vector3 newPanPosition) {
+		if (!panActive) {
+			return;
+		}
+
+		// Translate the camera position based on the new input position
+		Vector3 offset = cam.ScreenToViewportPoint(lastPanPosition - newPanPosition);
+		Vector3 move = new Vector3(offset.x * PanSpeed, offset.y * PanSpeed, 0f);
+		transform.Translate(move, Space.World);  
+		ClampToBounds();
+
+		lastPanPosition = newPanPosition;
+	}
+
+	void ClampToBounds() {
+		Vector3 pos = transform.position;
+		pos.x = Mathf.Clamp(transform.position.x, BoundsX[0], BoundsX[1]);
+		pos.z = Mathf.Clamp(transform.position.z, BoundsZ[0], BoundsZ[1]);
+
+		transform.position = pos;
+	}
+
+}