📄 mgcdistlin3rct3.cpp
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kSegPgm.Origin() = rkRct.Origin()+rkRct.Edge0();
kSegPgm.Direction() = rkRct.Edge1();
fSqrDist = MgcSqrDistance(rkSeg,kSegPgm,&fR,&fT);
fS = 1.0;
}
else // region 2
{
// min on face s=1 or t=1
kSegPgm.Origin() = rkRct.Origin()+rkRct.Edge0();
kSegPgm.Direction() = rkRct.Edge1();
fSqrDist = MgcSqrDistance(rkSeg,kSegPgm,&fR,&fT);
fS = 1.0;
kSegPgm.Origin() = rkRct.Origin()+rkRct.Edge1();
kSegPgm.Direction() = rkRct.Edge0();
fSqrDist0 = MgcSqrDistance(rkSeg,kSegPgm,&fR0,&fS0);
fT0 = 1.0;
if ( fSqrDist0 < fSqrDist )
{
fSqrDist = fSqrDist0;
fR = fR0;
fS = fS0;
fT = fT0;
}
}
}
}
else
{
if ( fS < 0.0 )
{
if ( fT < 0.0 ) // region 6p
{
// min on face s=0 or t=0 or r=1
kSegPgm.Origin() = rkRct.Origin();
kSegPgm.Direction() = rkRct.Edge1();
fSqrDist = MgcSqrDistance(rkSeg,kSegPgm,&fR,&fT);
fS = 0.0;
kSegPgm.Origin() = rkRct.Origin();
kSegPgm.Direction() = rkRct.Edge0();
fSqrDist0 = MgcSqrDistance(rkSeg,kSegPgm,&fR0,&fS0);
fT0 = 0.0;
if ( fSqrDist0 < fSqrDist )
{
fSqrDist = fSqrDist0;
fR = fR0;
fS = fS0;
fT = fT0;
}
kPt = rkSeg.Origin()+rkSeg.Direction();
fSqrDist0 = MgcSqrDistance(kPt,rkRct,&fS0,&fT0);
fR0 = 1.0;
if ( fSqrDist0 < fSqrDist )
{
fSqrDist = fSqrDist0;
fR = fR0;
fS = fS0;
fT = fT0;
}
}
else if ( fT <= 1.0 ) // region 5p
{
// min on face s=0 or r=1
kSegPgm.Origin() = rkRct.Origin();
kSegPgm.Direction() = rkRct.Edge1();
fSqrDist = MgcSqrDistance(rkSeg,kSegPgm,&fR,&fT);
fS = 0.0;
fSqrDist0 = MgcSqrDistance(rkSeg.Origin(),rkRct,&fS0,
&fT0);
kPt = rkSeg.Origin()+rkSeg.Direction();
fSqrDist0 = MgcSqrDistance(kPt,rkRct,&fS0,&fT0);
fR0 = 1.0;
if ( fSqrDist0 < fSqrDist )
{
fSqrDist = fSqrDist0;
fR = fR0;
fS = fS0;
fT = fT0;
}
}
else // region 4p
{
// min on face s=0 or t=1 or r=1
kSegPgm.Origin() = rkRct.Origin();
kSegPgm.Direction() = rkRct.Edge1();
fSqrDist = MgcSqrDistance(rkSeg,kSegPgm,&fR,&fT);
fS = 0.0;
kSegPgm.Origin() = rkRct.Origin()+rkRct.Edge1();
kSegPgm.Direction() = rkRct.Edge0();
fSqrDist0 = MgcSqrDistance(rkSeg,kSegPgm,&fR0,&fS0);
fT0 = 1.0;
if ( fSqrDist0 < fSqrDist )
{
fSqrDist = fSqrDist0;
fR = fR0;
fS = fS0;
fT = fT0;
}
kPt = rkSeg.Origin()+rkSeg.Direction();
fSqrDist0 = MgcSqrDistance(kPt,rkRct,&fS0,&fT0);
fR0 = 1.0;
if ( fSqrDist0 < fSqrDist )
{
fSqrDist = fSqrDist0;
fR = fR0;
fS = fS0;
fT = fT0;
}
}
}
else if ( fS <= 1.0 )
{
if ( fT < 0.0 ) // region 7p
{
// min on face t=0 or r=1
kSegPgm.Origin() = rkRct.Origin();
kSegPgm.Direction() = rkRct.Edge0();
fSqrDist = MgcSqrDistance(rkSeg,kSegPgm,&fR,&fS);
fT = 0.0;
kPt = rkSeg.Origin()+rkSeg.Direction();
fSqrDist0 = MgcSqrDistance(kPt,rkRct,&fS0,&fT0);
fR0 = 1.0;
if ( fSqrDist0 < fSqrDist )
{
fSqrDist = fSqrDist0;
fR = fR0;
fS = fS0;
fT = fT0;
}
}
else if ( fT <= 1.0 ) // region 0p
{
// min on face r=1
kPt = rkSeg.Origin()+rkSeg.Direction();
fSqrDist = MgcSqrDistance(kPt,rkRct,&fS,&fT);
fR = 1.0;
}
else // region 3p
{
// min on face t=1 or r=1
kSegPgm.Origin() = rkRct.Origin()+rkRct.Edge1();
kSegPgm.Direction() = rkRct.Edge0();
fSqrDist = MgcSqrDistance(rkSeg,kSegPgm,&fR,&fS);
fT = 1.0;
kPt = rkSeg.Origin()+rkSeg.Direction();
fSqrDist0 = MgcSqrDistance(kPt,rkRct,&fS0,&fT0);
fR0 = 1.0;
if ( fSqrDist0 < fSqrDist )
{
fSqrDist = fSqrDist0;
fR = fR0;
fS = fS0;
fT = fT0;
}
}
}
else
{
if ( fT < 0.0 ) // region 8p
{
// min on face s=1 or t=0 or r=1
kSegPgm.Origin() = rkRct.Origin()+rkRct.Edge0();
kSegPgm.Direction() = rkRct.Edge1();
fSqrDist = MgcSqrDistance(rkSeg,kSegPgm,&fR,&fT);
fS = 1.0;
kSegPgm.Origin() = rkRct.Origin();
kSegPgm.Direction() = rkRct.Edge0();
fSqrDist0 = MgcSqrDistance(rkSeg,kSegPgm,&fR0,&fS0);
fT0 = 0.0;
if ( fSqrDist0 < fSqrDist )
{
fSqrDist = fSqrDist0;
fR = fR0;
fS = fS0;
fT = fT0;
}
kPt = rkSeg.Origin()+rkSeg.Direction();
fSqrDist0 = MgcSqrDistance(kPt,rkRct,&fS0,&fT0);
fR0 = 1.0;
if ( fSqrDist0 < fSqrDist )
{
fSqrDist = fSqrDist0;
fR = fR0;
fS = fS0;
fT = fT0;
}
}
else if ( fT <= 1.0 ) // region 1p
{
// min on face s=1 or r=1
kSegPgm.Origin() = rkRct.Origin()+rkRct.Edge0();
kSegPgm.Direction() = rkRct.Edge1();
fSqrDist = MgcSqrDistance(rkSeg,kSegPgm,&fR,&fT);
fS = 1.0;
kPt = rkSeg.Origin()+rkSeg.Direction();
fSqrDist0 = MgcSqrDistance(kPt,rkRct,&fS0,&fT0);
fR0 = 1.0;
if ( fSqrDist0 < fSqrDist )
{
fSqrDist = fSqrDist0;
fR = fR0;
fS = fS0;
fT = fT0;
}
}
else // region 2p
{
// min on face s=1 or t=1 or r=1
kSegPgm.Origin() = rkRct.Origin()+rkRct.Edge0();
kSegPgm.Direction() = rkRct.Edge1();
fSqrDist = MgcSqrDistance(rkSeg,kSegPgm,&fR,&fT);
fS = 1.0;
kSegPgm.Origin() = rkRct.Origin()+rkRct.Edge1();
kSegPgm.Direction() = rkRct.Edge0();
fSqrDist0 = MgcSqrDistance(rkSeg,kSegPgm,&fR0,&fS0);
fT0 = 1.0;
if ( fSqrDist0 < fSqrDist )
{
fSqrDist = fSqrDist0;
fR = fR0;
fS = fS0;
fT = fT0;
}
kPt = rkSeg.Origin()+rkSeg.Direction();
fSqrDist0 = MgcSqrDistance(kPt,rkRct,&fS0,&fT0);
fR0 = 1.0;
if ( fSqrDist0 < fSqrDist )
{
fSqrDist = fSqrDist0;
fR = fR0;
fS = fS0;
fT = fT0;
}
}
}
}
}
else
{
// segment and rectangle are parallel
kSegPgm.Origin() = rkRct.Origin();
kSegPgm.Direction() = rkRct.Edge0();
fSqrDist = MgcSqrDistance(rkSeg,kSegPgm,&fR,&fS);
fT = 0.0;
kSegPgm.Direction() = rkRct.Edge1();
fSqrDist0 = MgcSqrDistance(rkSeg,kSegPgm,&fR0,&fT0);
fS0 = 0.0;
if ( fSqrDist0 < fSqrDist )
{
fSqrDist = fSqrDist0;
fR = fR0;
fS = fS0;
fT = fT0;
}
kSegPgm.Origin() = rkRct.Origin()+rkRct.Edge1();
kSegPgm.Direction() = rkRct.Edge0();
fSqrDist0 = MgcSqrDistance(rkSeg,kSegPgm,&fR0,&fS0);
fT0 = 1.0;
if ( fSqrDist0 < fSqrDist )
{
fSqrDist = fSqrDist0;
fR = fR0;
fS = fS0;
fT = fT0;
}
kSegPgm.Origin() = rkRct.Origin()+rkRct.Edge0();
kSegPgm.Direction() = rkRct.Edge1();
fSqrDist0 = MgcSqrDistance(rkSeg,kSegPgm,&fR0,&fT0);
fS0 = 1.0;
if ( fSqrDist0 < fSqrDist )
{
fSqrDist = fSqrDist0;
fR = fR0;
fS = fS0;
fT = fT0;
}
fSqrDist0 = MgcSqrDistance(rkSeg.Origin(),rkRct,&fS0,&fT0);
fR0 = 0.0;
if ( fSqrDist0 < fSqrDist )
{
fSqrDist = fSqrDist0;
fR = fR0;
fS = fS0;
fT = fT0;
}
kPt = rkSeg.Origin()+rkSeg.Direction();
fSqrDist0 = MgcSqrDistance(kPt,rkRct,&fS0,&fT0);
fR0 = 1.0;
if ( fSqrDist0 < fSqrDist )
{
fSqrDist = fSqrDist0;
fR = fR0;
fS = fS0;
fT = fT0;
}
}
if ( pfSegP )
*pfSegP = fR;
if ( pfRctP0 )
*pfRctP0 = fS;
if ( pfRctP1 )
*pfRctP1 = fT;
return MgcMath::Abs(fSqrDist);
}
//----------------------------------------------------------------------------
MgcReal MgcDistance (const MgcLine3& rkLine, const MgcRectangle3& rkRct,
MgcReal* pfLinP, MgcReal* pfRctP0, MgcReal* pfRctP1)
{
return MgcMath::Sqrt(MgcSqrDistance(rkLine,rkRct,pfLinP,pfRctP0,pfRctP1));
}
//----------------------------------------------------------------------------
MgcReal MgcDistance (const MgcRay3& rkRay, const MgcRectangle3& rkRct,
MgcReal* pfRayP, MgcReal* pfRctP0, MgcReal* pfRctP1)
{
return MgcMath::Sqrt(MgcSqrDistance(rkRay,rkRct,pfRayP,pfRctP0,pfRctP1));
}
//----------------------------------------------------------------------------
MgcReal MgcDistance (const MgcSegment3& rkSeg, const MgcRectangle3& rkRct,
MgcReal* pfSegP, MgcReal* pfRctP0, MgcReal* pfRctP1)
{
return MgcMath::Sqrt(MgcSqrDistance(rkSeg,rkRct,pfSegP,pfRctP0,pfRctP1));
}
//----------------------------------------------------------------------------
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