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0029934: Visualization - handle properly orthogonal clipping plane within SelectMgr_RectangularFrustum::computeClippingRange()

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SelectMgr_RectangularFrustum now considers the direction of clipping plane orthogonal to picking ray.
This commit is contained in:
kgv
2018-07-06 19:04:49 +03:00
committed by bugmaster
parent 98b15dbfce
commit 029594a052
2 changed files with 32 additions and 13 deletions
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29
src/SelectMgr/SelectMgr_RectangularFrustum.cxx
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@@ -665,23 +665,30 @@ void SelectMgr_RectangularFrustum::computeClippingRange (const Graphic3d_Sequenc
const gp_XYZ& aPlaneDirXYZ = aGeomPlane.Axis().Direction().XYZ();
Standard_Real aDotProduct = myViewRayDir.XYZ().Dot (aPlaneDirXYZ);
Standard_Real aDistance = -myNearPickedPnt.XYZ().Dot (aPlaneDirXYZ) - aPlaneD;
Standard_Real aDistToPln = 0.0;
// check whether the pick line is parallel to clip plane
if (Abs (aDotProduct) < Precision::Angular())
{
// line lies below the plane and is not clipped, skip
continue;
if (aDistance < 0.0)
{
continue;
}
aDistToPln = RealLast();
aDotProduct = 1.0;
}
// compute distance to point of pick line intersection with the plane
const Standard_Real aParam = aDistance / aDotProduct;
const gp_Pnt anIntersectionPnt = myNearPickedPnt.XYZ() + myViewRayDir.XYZ() * aParam;
Standard_Real aDistToPln = anIntersectionPnt.Distance (myNearPickedPnt);
if (aParam < 0.0)
else
{
// the plane is "behind" the ray
aDistToPln = -aDistToPln;
// compute distance to point of pick line intersection with the plane
const Standard_Real aParam = aDistance / aDotProduct;
const gp_Pnt anIntersectionPnt = myNearPickedPnt.XYZ() + myViewRayDir.XYZ() * aParam;
aDistToPln = anIntersectionPnt.Distance (myNearPickedPnt);
if (aParam < 0.0)
{
// the plane is "behind" the ray
aDistToPln = -aDistToPln;
}
}
// change depth limits for case of opposite and directed planes