public static PointF ResolveToImage(this PointF self, float zoom, float dx, float dy,
CoordinateResolvingOrigin origin = CoordinateResolvingOrigin.Image)
{
float x, y;
ResolveCoordinates(self.X, self.Y, dx, dy, out x, out y, zoom, CoordinateResolvingDirection.ViewToImage,
origin);
return(new PointF(x, y));
}
/// <summary>
/// Разрешаем координаты изображения с учетом зума и сдвига относительно отображения.
/// Сдвиг считается в координатах для origin
/// </summary>
/// <param name="x"></param>
/// <param name="y"></param>
/// <param name="dx"></param>
/// <param name="dy"></param>
/// <param name="rx"></param>
/// <param name="ry"></param>
/// <param name="zoom"></param>
/// <param name="direction"></param>
/// <param name="origin"></param>
public static void ResolveCoordinates(float x, float y, float dx, float dy, out float rx, out float ry,
float zoom, CoordinateResolvingDirection direction,
CoordinateResolvingOrigin origin = CoordinateResolvingOrigin.Image)
{
if (direction == CoordinateResolvingDirection.ImageToView)
{
ResolveCoordinates_ImageToView(x, y, dx, dy, out rx, out ry, zoom, origin);
}
else
{
ResolveCoordinates_ViewToImage(x, y, dx, dy, out rx, out ry, zoom, origin);
}
}
private static void ResolveCoordinates_ViewToImage(float vx, float vy, float dx, float dy, out float ix,
out float iy, float zoom, CoordinateResolvingOrigin origin)
{
ix = vx / zoom;
iy = vy / zoom;
if (origin == CoordinateResolvingOrigin.View)
{
dx = dx / zoom;
dy = dy / zoom;
}
ix += dx;
iy += dy;
}
private static void ResolveCoordinates_ImageToView(float ix, float iy, float dx, float dy, out float vx,
out float vy, float zoom, CoordinateResolvingOrigin origin)
{
vx = ix * zoom;
vy = iy * zoom;
if (origin == CoordinateResolvingOrigin.Image)
{
dx = dx * zoom;
dy = dy * zoom;
}
vx += dx;
vy += dy;
}
