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0029791: Visualization - Wrong result of SelectMgr_RectangularFrustum::IsClipped

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SelectMgr_RectangularFrustum::computeClippingRange() fix skipping depth range starting behind the ray.
This commit is contained in:
kgv 2018-05-24 20:10:32 +03:00 committed by abv
parent 3e782664b8
commit fad3eca77f
2 changed files with 26 additions and 8 deletions
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13
src/SelectMgr/SelectMgr_RectangularFrustum.cxx
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@ -675,18 +675,15 @@ void SelectMgr_RectangularFrustum::computeClippingRange (const Graphic3d_Sequenc
}
// compute distance to point of pick line intersection with the plane
Standard_Real aParam = aDistance / aDotProduct;
// check if ray intersects the plane, in case aIntDist < 0
// the plane is "behind" the ray
const Standard_Real aParam = aDistance / aDotProduct;
const gp_Pnt anIntersectionPt = myNearPickedPnt.XYZ() + myViewRayDir.XYZ() * aParam;
Standard_Real aDistToPln = anIntersectionPt.Distance (myNearPickedPnt);
if (aParam < 0.0)
{
continue;
// the plane is "behind" the ray
aDistToPln = -aDistToPln;
}
const gp_Pnt anIntersectionPt = myNearPickedPnt.XYZ() + myViewRayDir.XYZ() * aParam;
const Standard_Real aDistToPln = anIntersectionPt.Distance (myNearPickedPnt);
// change depth limits for case of opposite and directed planes
if (aDotProduct < 0.0)
{

21
tests/bugs/vis/bug29791 Normal file
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@ -0,0 +1,21 @@
puts "============"
puts "0029791: Visualization - Wrong result of SelectMgr_RectangularFrustum::IsClipped"
puts "============"
puts ""
pload MODELING VISUALIZATION
restore [locate_data_file occ/bottle.brep] b
vclear
vinit View1
vdisplay -dispMode 1 -highMode 1 b
vfit
vzbufftrihedron
vviewparams -scale 14.7435 -proj 0.193921 -0.891229 0.410007 -up -0.0205984 0.414149 0.909976 -at 11.3689 1.32152 24.9954
vclipplane p -equation 1 0 0 -20 -set
vmoveto 150 200
vstate -entities
vselect 150 200
if { [vreadpixel 150 200 rgb name] != "BLACK" } { puts "Error: object is not clipped" }
if { [vreadpixel 300 200 rgb name] != "GOLDENROD1" } { puts "Error: object should NOT be selected" }
vdump $imagedir/${casename}.png