/// <summary>
/// 得到以某视图坐标为中心的视图矩形;
/// </summary>
/// <param name="nativeCenterRectPoint">以视图为准的中心坐标</param>
/// <param name="width">宽度</param>
/// <param name="height">高度</param>
/// <returns></returns>
public static Rectangle2D2 GetNativeSuroundingScreenRect(Vector2D nativeCenterRectPoint, double width, double height)
{
if (nativeCenterRectPoint == null)
{
throw new ArgumentNullException(nameof(nativeCenterRectPoint));
}
var surroundingRect = Rectangle2D2.CreateEmpty();
GetNativeSuroundingScreenRect(nativeCenterRectPoint, width, height, surroundingRect);
return(surroundingRect);
}
public ISnapShape MatchSnapShape(DrawObject[] drawObjects, Vector2D position, ICanvasContext canvasContext)
{
if (drawObjects == null)
{
return(null);
}
#if DEBUG
//position = new Vector2D(0, 0);
#endif
var screenPosition = canvasContext.CanvasProxy.ToScreen(position);
var rect = Rectangle2D2.CreateEmpty();
//双游标两两遍历;
for (int i = 0; i < drawObjects.Length - 1; i++)
{
for (int j = i + 1; j < drawObjects.Length; j++)
{
var intersectPositions = DrawObjectIntersectRule.GetIntersectPositions(drawObjects[i], drawObjects[j]);
if (intersectPositions == null)
{
continue;
}
foreach (var intersectPosition in intersectPositions)
{
NativeGeometryExtensions.GetNativeSuroundingScreenRect(
canvasContext.CanvasProxy.ToScreen(intersectPosition),
TolerantedScreenLength,
TolerantedScreenLength,
rect
);
if (rect.Contains(screenPosition))
{
return(new IntersectSnapPoint(intersectPosition));
}
}
}
}
return(null);
}
