internal LitMath.Vector2 Snap(LitMath.Vector2 posInCanvas)
{
LitMath.Vector2 posInModel = _presenter.CanvasToModel(posInCanvas);
foreach (KeyValuePair <ObjectId, List <GripPoint> > kvp in _gripPnts)
{
int index = -1;
foreach (GripPoint gripPnt in kvp.Value)
{
++index;
double width = 10;
double height = 10;
LitMath.Vector2 gripPosInCanvas = _presenter.ModelToCanvas(gripPnt.position);
gripPosInCanvas.x -= width / 2;
gripPosInCanvas.y -= height / 2;
LitMath.Rectangle2 rect = new LitMath.Rectangle2(gripPosInCanvas, width, height);
if (MathUtils.IsPointInRectangle(posInCanvas, rect))
{
_currGripPoint = gripPnt;
_currGripEntityId = kvp.Key;
_currGripPointIndex = index;
return(gripPnt.position);
}
}
}
_currGripPoint = null;
_currGripEntityId = ObjectId.Null;
_currGripPointIndex = -1;
return(posInModel);
}
static void Main(string[] args)
{
//LitMath.Vector2 v = new LitMath.Vector2(0.7, 0.7);
//v = LitMath.Vector2.RotateInRadian(v, LitMath.Utils.PI / 2);
//Console.WriteLine(v.ToString());
//Console.WriteLine(Math.Asin(0.5).ToString());
{
LitMath.Vector3 va = new LitMath.Vector3(0, 0, 1);
LitMath.Vector3 vb = new LitMath.Vector3(0, 1, 0);
LitMath.Vector3 axis = new LitMath.Vector3(1, 1, 0);
double angle = LitMath.Vector3.SignedAngle(va, vb, axis);
Console.WriteLine(angle);
}
{
LitMath.Vector3 va = new LitMath.Vector3(0, 0, 1);
LitMath.Vector3 vb = new LitMath.Vector3(0, 0, 1);
LitMath.Vector3 axis = new LitMath.Vector3(1, 1, 0);
double angle = LitMath.Vector3.SignedAngle(va, vb, axis);
Console.WriteLine(angle);
}
{
LitMath.Vector3 va = new LitMath.Vector3(0, 0, 1);
LitMath.Vector3 vb = new LitMath.Vector3(0, 1, 0);
LitMath.Vector3 axis = new LitMath.Vector3(0, 1, 1);
double angle = LitMath.Vector3.SignedAngle(va, vb, axis);
Console.WriteLine(angle);
}
return;
//LitMath.Vector2 v1 = new LitMath.Vector2(1, 3);
//Console.WriteLine(v1.ToString());
LitMath.Line2 line1 = new LitMath.Line2(
new LitMath.Vector2(0, 0),
new LitMath.Vector2(10, 0));
line1.startPoint.x = 10;
LitMath.Line2 line2 = new LitMath.Line2(
new LitMath.Vector2(5, 0),
new LitMath.Vector2(5, 10));
LitMath.Vector2 intersection = new LitMath.Vector2();
if (LitMath.Line2.Intersect(line1, line2, ref intersection))
{
Console.WriteLine("相交: " + intersection.ToString());
}
LitMath.Rectangle2 rect = new LitMath.Rectangle2(new LitMath.Vector2(10, 10), 10, 20);
Console.WriteLine(rect.ToString());
Console.WriteLine(rect.leftBottom.ToString());
Console.WriteLine(rect.leftTop.ToString());
Console.WriteLine(rect.rightTop.ToString());
Console.WriteLine(rect.rightBottom.ToString());
LitMath.Circle2 circle = new LitMath.Circle2(new LitMath.Vector2(25, 25), 10);
Console.WriteLine(circle.ToString());
Console.WriteLine(circle.diameter.ToString());
}
/// <summary>
/// 点是否在矩形内
/// </summary>
internal static bool IsPointInRectangle(LitMath.Vector2 point, LitMath.Rectangle2 rect)
{
LitMath.Vector2 rectLeftBottom = rect.leftBottom;
LitMath.Vector2 rectRightTop = rect.rightTop;
if (point.x >= rectLeftBottom.x &&
point.x <= rectRightTop.x &&
point.y >= rectLeftBottom.y &&
point.y <= rectRightTop.y)
{
return(true);
}
else
{
return(false);
}
}
internal override bool Cross(Bounding selectBound, Entity entity)
{
Polyline polyline = entity as Polyline;
if (polyline == null)
{
return(false);
}
Bounding polylineBound = polyline.bounding;
if (selectBound.Contains(polylineBound))
{
return(true);
}
LitMath.Rectangle2 selRect = new LitMath.Rectangle2(
new LitMath.Vector2(selectBound.left, selectBound.bottom),
new LitMath.Vector2(selectBound.right, selectBound.top));
LitMath.Line2 rectLine1 = new LitMath.Line2(selRect.leftBottom, selRect.leftTop);
LitMath.Line2 rectLine2 = new LitMath.Line2(selRect.leftTop, selRect.rightTop);
LitMath.Line2 rectLine3 = new LitMath.Line2(selRect.rightTop, selRect.rightBottom);
LitMath.Line2 rectLine4 = new LitMath.Line2(selRect.rightBottom, selRect.leftBottom);
for (int i = 1; i < polyline.NumberOfVertices; ++i)
{
LitMath.Vector2 spnt = polyline.GetPointAt(i - 1);
LitMath.Vector2 epnt = polyline.GetPointAt(i);
LitMath.Line2 line2 = new LitMath.Line2(spnt, epnt);
LitMath.Vector2 intersection = new LitMath.Vector2();
if (LitMath.Line2.Intersect(rectLine1, line2, ref intersection) ||
LitMath.Line2.Intersect(rectLine2, line2, ref intersection) ||
LitMath.Line2.Intersect(rectLine3, line2, ref intersection) ||
LitMath.Line2.Intersect(rectLine4, line2, ref intersection))
{
return(true);
}
}
return(false);
}
internal override bool Cross(Bounding selectBound, Entity entity)
{
Line line = entity as Line;
if (line == null)
{
return(false);
}
Bounding lineBound = line.bounding;
if (selectBound.Contains(lineBound))
{
return(true);
}
LitMath.Rectangle2 selRect = new LitMath.Rectangle2(
new LitMath.Vector2(selectBound.left, selectBound.bottom),
new LitMath.Vector2(selectBound.right, selectBound.top));
LitMath.Line2 rectLine1 = new LitMath.Line2(selRect.leftBottom, selRect.leftTop);
LitMath.Line2 rectLine2 = new LitMath.Line2(selRect.leftTop, selRect.rightTop);
LitMath.Line2 rectLine3 = new LitMath.Line2(selRect.rightTop, selRect.rightBottom);
LitMath.Line2 rectLine4 = new LitMath.Line2(selRect.rightBottom, selRect.leftBottom);
LitMath.Line2 line2 = new LitMath.Line2(line.startPoint, line.endPoint);
LitMath.Vector2 intersection = new LitMath.Vector2();
if (LitMath.Line2.Intersect(rectLine1, line2, ref intersection) ||
LitMath.Line2.Intersect(rectLine2, line2, ref intersection) ||
LitMath.Line2.Intersect(rectLine3, line2, ref intersection) ||
LitMath.Line2.Intersect(rectLine4, line2, ref intersection))
{
return(true);
}
else
{
return(false);
}
}
