/*
* METHODS: MISORIENTED
*/
public bool RayAlmostNormal(out RayD ray, out CParam parStartRay)
{
ray = null;
parStartRay = null;
bool isCurveOK = false;
int numTrialMax = 100; // TODO: make constant
int numTrialCur = 0;
while ((!isCurveOK) && (numTrialCur < numTrialMax))
{
numTrialCur++;
try
{
int pozKnotStart = rand.Next(this.NumKnot);
BCurve curveStart = this.CurveByPoz(pozKnotStart);
if (curveStart == null)
{
pozKnotStart = this.PozNext(pozKnotStart);
curveStart = this.CurveByPoz(pozKnotStart);
if (curveStart == null)
{
//Debug.Assert(false, "Contour: RayAlmostNormal");
continue;
}
}
InfoInters inters;
if ((!curveStart.IsDegen) && (curveStart.BBox.Diag >= 1 - MConsts.EPS_DEC_WEAK) &&
(!curveStart.IsSelfInters(out inters)))
{
double parVal = 0.25 * rand.Next(1, 4);
VecD pntStart = curveStart.Evaluate(parVal);
VecD dirNorm = curveStart.DirNorm(parVal);
if ((pntStart == null) || (dirNorm == null))
{
//Debug.Assert(false, "Contour: RayAlmostNormal");
continue;
}
double angleRot = (rand.NextDouble() - 0.5) * (Math.PI / 5.0);
double scale = 100.0; // TODO: make constant
VecD dirRay = new VecD(scale * (Math.Cos(angleRot) * dirNorm.X - Math.Sin(angleRot) * dirNorm.Y),
scale * (Math.Sin(angleRot) * dirNorm.X + Math.Cos(angleRot) * dirNorm.Y));
bool isChanged;
dirRay.FURound(out isChanged);
ray = new RayD(pntStart, pntStart + dirRay);
parStartRay = new CParam(parVal, this.KnotByPoz(pozKnotStart));
isCurveOK = true;
}
}
catch (ExceptionGMath)
{
}
}
return(isCurveOK);
}
public bool RayParity(RayD ray, CParam parStartRay,
out MConsts.TypeParity typeParity)
{
/*
* ASSUMPTIONS
* INPUT:
* - (parStartRay==null) is the ray does not start at
* the contour
* RETURN VALUE;
* - (false) in case of real failure;
* (true)+(typeParity==Undef) in unclear cases
*
*/
typeParity=MConsts.TypeParity.Undef;
ListInfoInters linters=new ListInfoInters();
bool isStartIntersFound=false;
for (int pozKnot=0; pozKnot<this.NumKnot; pozKnot++)
{
BCurve curve=this.CurveByPoz(pozKnot);
if (curve!=null)
{
Knot knot=this.KnotByPoz(pozKnot);
int numIntersBefore=linters.Count;
if (!Inters.IntersectBL(curve,ray,linters))
{
linters.ClearDestroy();
return false;
}
int numIntersAfter=linters.Count;
if (numIntersAfter!=numIntersBefore)
{
InfoInters inters;
if ((curve.IsDegen)||(curve.IsSelfInters(out inters)))
{
linters.ClearDestroy();
return true;
}
}
bool isRayStartOnCurve=((parStartRay!=null)&&
(parStartRay.IndKnot==knot.IndexKnot));
for (int iInters=numIntersBefore; iInters<numIntersAfter; iInters++)
{
InfoInters inters=linters[iInters] as InfoInters;
if (inters.Dim==InfoInters.TypeDim.Dim1)
{
linters.ClearDestroy();
return true;
}
IntersD0 intersD0=inters as IntersD0;
double parValCurve=intersD0.Ipi.Par(0).Val;
double parValRay=intersD0.Ipi.Par(1).Val;
if (Math.Abs(parValRay)<MConsts.EPS_DEC)
{
if ((!isRayStartOnCurve)||(isRayStartOnCurve&&isStartIntersFound))
{
linters.ClearDestroy();
return true;
}
isStartIntersFound=true;
}
if ((Math.Abs(parValCurve)<MConsts.EPS_DEC_WEAK)||
(Math.Abs(1.0-parValCurve)<MConsts.EPS_DEC_WEAK))
{
linters.ClearDestroy();
return true;
}
VecD dirTangCurve=curve.DirTang(parValCurve);
VecD dirTangRay=(ray as LCurve).DirTang;
if ((dirTangCurve==null)||(dirTangRay==null))
{
linters.ClearDestroy();
return true;
}
if (Math.Abs(dirTangRay.Cross(dirTangCurve))<MConsts.EPS_DEC_WEAK)
{
linters.ClearDestroy();
return true;
}
}
if ((isRayStartOnCurve)&&(!isStartIntersFound))
{
linters.ClearDestroy();
return true;
}
}
}
int numIntersAll=(isStartIntersFound)? linters.Count-1: linters.Count;
typeParity=(numIntersAll%2==0)? MConsts.TypeParity.Even: MConsts.TypeParity.Odd;
linters.ClearDestroy();
return true;
}
/*
* METHODS: MISORIENTED
*/
public bool RayAlmostNormal(out RayD ray, out CParam parStartRay)
{
ray=null;
parStartRay=null;
bool isCurveOK=false;
int numTrialMax=100; // TODO: make constant
int numTrialCur=0;
while ((!isCurveOK)&&(numTrialCur<numTrialMax))
{
numTrialCur++;
try
{
int pozKnotStart=rand.Next(this.NumKnot);
BCurve curveStart=this.CurveByPoz(pozKnotStart);
if (curveStart==null)
{
pozKnotStart=this.PozNext(pozKnotStart);
curveStart=this.CurveByPoz(pozKnotStart);
if (curveStart==null)
{
//Debug.Assert(false, "Contour: RayAlmostNormal");
continue;
}
}
InfoInters inters;
if ((!curveStart.IsDegen)&&(curveStart.BBox.Diag>=1-MConsts.EPS_DEC_WEAK)&&
(!curveStart.IsSelfInters(out inters)))
{
double parVal=0.25*rand.Next(1,4);
VecD pntStart=curveStart.Evaluate(parVal);
VecD dirNorm=curveStart.DirNorm(parVal);
if ((pntStart==null)||(dirNorm==null))
{
//Debug.Assert(false, "Contour: RayAlmostNormal");
continue;
}
double angleRot=(rand.NextDouble()-0.5)*(Math.PI/5.0);
double scale=100.0; // TODO: make constant
VecD dirRay=new VecD(scale*(Math.Cos(angleRot)*dirNorm.X-Math.Sin(angleRot)*dirNorm.Y),
scale*(Math.Sin(angleRot)*dirNorm.X+Math.Cos(angleRot)*dirNorm.Y));
bool isChanged;
dirRay.FURound(out isChanged);
ray=new RayD(pntStart,pntStart+dirRay);
parStartRay=new CParam(parVal,this.KnotByPoz(pozKnotStart));
isCurveOK=true;
}
}
catch (ExceptionGMath)
{
}
}
return isCurveOK;
}
public bool RayParity(RayD ray, CParam parStartRay,
out MConsts.TypeParity typeParity)
{
/*
* ASSUMPTIONS
* INPUT:
* - (parStartRay==null) is the ray does not start at
* the contour
* RETURN VALUE;
* - (false) in case of real failure;
* (true)+(typeParity==Undef) in unclear cases
*
*/
typeParity = MConsts.TypeParity.Undef;
ListInfoInters linters = new ListInfoInters();
bool isStartIntersFound = false;
for (int pozKnot = 0; pozKnot < this.NumKnot; pozKnot++)
{
BCurve curve = this.CurveByPoz(pozKnot);
if (curve != null)
{
Knot knot = this.KnotByPoz(pozKnot);
int numIntersBefore = linters.Count;
if (!Inters.IntersectBL(curve, ray, linters))
{
linters.ClearDestroy();
return(false);
}
int numIntersAfter = linters.Count;
if (numIntersAfter != numIntersBefore)
{
InfoInters inters;
if ((curve.IsDegen) || (curve.IsSelfInters(out inters)))
{
linters.ClearDestroy();
return(true);
}
}
bool isRayStartOnCurve = ((parStartRay != null) &&
(parStartRay.IndKnot == knot.IndexKnot));
for (int iInters = numIntersBefore; iInters < numIntersAfter; iInters++)
{
InfoInters inters = linters[iInters] as InfoInters;
if (inters.Dim == InfoInters.TypeDim.Dim1)
{
linters.ClearDestroy();
return(true);
}
IntersD0 intersD0 = inters as IntersD0;
double parValCurve = intersD0.Ipi.Par(0).Val;
double parValRay = intersD0.Ipi.Par(1).Val;
if (Math.Abs(parValRay) < MConsts.EPS_DEC)
{
if ((!isRayStartOnCurve) || (isRayStartOnCurve && isStartIntersFound))
{
linters.ClearDestroy();
return(true);
}
isStartIntersFound = true;
}
if ((Math.Abs(parValCurve) < MConsts.EPS_DEC_WEAK) ||
(Math.Abs(1.0 - parValCurve) < MConsts.EPS_DEC_WEAK))
{
linters.ClearDestroy();
return(true);
}
VecD dirTangCurve = curve.DirTang(parValCurve);
VecD dirTangRay = (ray as LCurve).DirTang;
if ((dirTangCurve == null) || (dirTangRay == null))
{
linters.ClearDestroy();
return(true);
}
if (Math.Abs(dirTangRay.Cross(dirTangCurve)) < MConsts.EPS_DEC_WEAK)
{
linters.ClearDestroy();
return(true);
}
}
if ((isRayStartOnCurve) && (!isStartIntersFound))
{
linters.ClearDestroy();
return(true);
}
}
}
int numIntersAll = (isStartIntersFound)? linters.Count - 1: linters.Count;
typeParity = (numIntersAll % 2 == 0)? MConsts.TypeParity.Even: MConsts.TypeParity.Odd;
linters.ClearDestroy();
return(true);
}