public void Copy(BoundingBox2D src)
{
MinX = src.MinX;
MaxX = src.MaxX;
MinY = src.MinY;
MaxY = src.MaxY;
IsntEmpty = src.IsntEmpty;
}
public bool IsIntersect(BoundingBox2D bb, double clearance)
{
if (bb.MinX > MaxX + clearance || bb.MaxX < MinX - clearance)
{
return(false);
}
if (bb.MinY > MaxY + clearance || bb.MaxY < MinY - clearance)
{
return(false);
}
return(true);
}
public static BoundingBox2D operator +(BoundingBox2D bb1, BoundingBox2D bb2)
{
BoundingBox2D result;
if (!bb2.IsntEmpty)
{
result = new BoundingBox2D(bb1);
return(result);
}
if (!bb1.IsntEmpty)
{
result = new BoundingBox2D(bb2);
return(result);
}
double xMax = (bb1.MaxX > bb2.MaxX) ? bb1.MaxX : bb2.MaxX;
double xMin = (bb1.MinX < bb2.MinX) ? bb1.MinX : bb2.MinX;
double yMax = (bb1.MaxY > bb2.MaxY) ? bb1.MaxY : bb2.MaxY;
double yMin = (bb1.MinY < bb2.MinY) ? bb1.MinY : bb2.MinY;
result = new BoundingBox2D(xMin, xMax, yMin, yMax);
return(result);
}
public static int CheckEdgeIntersection(IList <Edge2D> edges)
{
uint edgeCnt = (uint)edges.Count;
for (int iedge = 0; iedge < edgeCnt; iedge++)
{
Edge2D iE = edges[iedge];
if (iE.IsCrossEdgeSelf())
{
return(1);
}
uint iPt0 = iE.GetVertexId(true);
uint iPt1 = iE.GetVertexId(false);
BoundingBox2D iBB = iE.GetBoundingBox();
for (int jedge = iedge + 1; jedge < edgeCnt; jedge++)
{
Edge2D jE = edges[jedge];
uint jPt0 = jE.GetVertexId(true);
uint jPt1 = jE.GetVertexId(false);
if ((iPt0 - jPt0) * (iPt0 - jPt1) * (iPt1 - jPt0) * (iPt1 - jPt1) != 0)
{
BoundingBox2D jBB = jE.GetBoundingBox();
if (jBB.MinX > iBB.MaxX || jBB.MaxX < iBB.MinX)
{
continue;
}
if (jBB.MinY > iBB.MaxY || jBB.MaxY < iBB.MinY)
{
continue;
}
if (!iE.IsCrossEdge(jE))
{
continue;
}
return(1);
}
if (iPt0 == jPt0 && iPt1 == jPt1)
{
if (iE.IsCrossEdgeShareBothPoints(jE, true))
{
return(1);
}
}
else if (iPt0 == jPt1 && iPt1 == jPt0)
{
if (iE.IsCrossEdgeShareBothPoints(jE, false))
{
return(1);
}
}
else if (iPt0 == jPt0)
{
if (iE.IsCrossEdgeShareOnePoint(jE, true, true))
{
return(1);
}
}
else if (iPt0 == jPt1)
{
if (iE.IsCrossEdgeShareOnePoint(jE, true, false))
{
return(1);
}
}
else if (iPt1 == jPt0)
{
if (iE.IsCrossEdgeShareOnePoint(jE, false, true))
{
return(1);
}
}
else if (iPt1 == jPt1)
{
if (iE.IsCrossEdgeShareOnePoint(jE, false, false))
{
return(1);
}
}
continue;
}
}
return(0);
}
