MantisBT - VTK
In the function vtkXYPlotActor::ClipPlotData, it checks all the points are creates new cells for which the points outside the specified range are kept. The ones outside the range are excluded.
One case is not handled. In the following code, if there are no trivial rejection, nor trivial acceptance, than we check if x1 is out of range. If so, we assume that x2 is not, which is not always true.
In that case, an id of -1 will be set to a cell, which may cause a crash at rendering time.
//intersect each segment with the four planes
if ( (x1[0] < p1[0] && x2[0] < p1[0]) || (x1[0] > p2[0] && x2[0] > p2[0]) ||
(x1[1] < p1[1] && x2[1] < p1[1]) || (x1[1] > p2[1] && x2[1] > p2[1]) )
{
;//trivial rejection
}
else if (x1[0] >= p1[0] && x2[0] >= p1[0] && x1[0] <= p2[0] && x2[0] <= p2[0] &&
x1[1] >= p1[1] && x2[1] >= p1[1] && x1[1] <= p2[1] && x2[1] <= p2[1] )
{//trivial acceptance
newPts[0] = pointMap[pts[i]];
newPts[1] = pointMap[pts[i+1]];
newLines->InsertNextCell(2,newPts);
}
else
{
if (x1[0] >= p1[0] && x1[0] <= p2[0] && x1[1] >= p1[1] && x1[1] <= p2[1] )
{//first point in
newPts[0] = pointMap[pts[i]];
}
else
{//second point in
newPts[0] = pointMap[pts[i+1]];
}
for (j=0; j<4; j++)
{
this->ClipPlanes->GetPoints()->GetPoint(j, px);
this->ClipPlanes->GetNormals()->GetTuple(j, n);
if ( vtkPlane::IntersectWithLine(x1,x2,n,px,t,xint) && t >= 0 && t <= 1.0 )
{
newPts[1] = newPoints->InsertNextPoint(xint);
break;
}
}
newLines->InsertNextCell(2,newPts);
}
}
vtkXYPlotActorPatch.txt (597) 2009-11-11 13:44https://www.vtk.org/Bug/file/7651/vtkXYPlotActorPatch.txt