public static void PinchAndZoom(this Urho.Camera camera, TouchState fingerOne, TouchState fingerTwo, float min, float max)
{
float zoom = GetZoomAmountFromPinch(fingerOne, fingerTwo);
if (zoom != 0)
{
bool reset2DPosition = false;
// TODO: transform the precision depending on distance from screen to camera so
// that the user can zoom in really closely with great precision
float newPosition = camera.Node.Position.Z + (float)zoom;
if (newPosition <= min)
{
newPosition = min;
// We also need to reset panning (2D position)
// TODO: Handle a smooth transition hier
reset2DPosition = true;
}
else if (newPosition >= max)
{
newPosition = max;
}
// NOTE: Is this marked as dirty and only updated in the update loop
camera.Node.SetWorldPosition(new Vector3(reset2DPosition == true ? 0.0f : camera.Node.Position.X, reset2DPosition == true ? 0.0f : camera.Node.Position.Y, newPosition));
}
}
public GridScreenLayout(int itemCount, int columns, Urho.Camera camera)
{
Columns = columns;
Camera = camera;
ItemCount = itemCount;
// TODO: Handle offset when panning
Offset = 0;
}
// TODO: Add initialization for float frameHeight, float frameWidth, float min
public CameraScreen(DataModels.Camera camera, Node cameraNode)
{
Camera = camera;
this.cameraNode = cameraNode;
urhoCamera = cameraNode.GetComponent <Urho.Camera>();
orientation = camera.Orientation;
ReceiveSceneUpdates = true;
// Set position in relation to the number of cameras that are already initialized
// so the screens can be positioned accordingly
position = screenCount + 1;
screenCount++;
}
/// <summary>
/// Pans a camera in both x- and y-direction
/// </summary>
/// <param name="camera">the camera to be panned</param>
/// <param name="dx">the pan value in x-direction</param>
/// <param name="dy">the pan value in y-direction</param>
public static void Pan(this Urho.Camera camera, int dx, int dy, float precision = 0.005f, bool onZoom = true, float maxY = -99999, float minY = -99999, float maxX = -99999, float minX = -99999)
{
// Only pan if camera is zoomed
if (!onZoom || camera.Zoom > 1)
{
float x = camera.Node.Position.X + -dx * precision;
float y = camera.Node.Position.Y + dy * precision;
// TODO: create an extension method to handle clamping of values
if (maxY > -99999 && y > maxY)
{
y = maxY;
}
if (minY > -99999 && y < minY)
{
y = minY;
}
if (maxX > -99999 && x > maxX)
{
x = maxX;
}
if (minX > -99999 && x < minX)
{
x = minX;
}
Urho.Application.InvokeOnMain(() => camera.Node.SetPosition2D(new Vector2(x, y)));
}
else
{
// Reset camera position
camera.Node.Position = new Vector3(0, 0, camera.Node.Position.Z);
}
}