void Slice::ConnectSegmentNeighbors()
{
unsigned int s;
unsigned int potential;
unsigned int s2;
double potentialangle;
double potentialDist;
double minDist = 10000.0;
Segment* thisSeg = NULL;
Segment* thatSeg = NULL;
QVector2D* thisPoint = NULL;
QVector2D* thatPoint = NULL;
std::vector<Segment*> sameXStripSegs;
std::vector<Segment*> potentialLeadSegs;
Segment* finalLeadSeg = NULL;
for(s = 0; s < segmentList.size(); s++)//compare from every segment
{
thisSeg = segmentList[s];
thisPoint = &thisSeg->p2;//compare from the 2nd point on "this" segment
if(thisSeg->leadingSeg)//no need to add a connection if there already is one!
continue;
potentialLeadSegs.clear();//clear out the potentials list
GetSegmentsAroundX(sameXStripSegs, thisPoint->x());
//////////////////////////////////////
for(s2 = 0; s2 < sameXStripSegs.size(); s2++)//to every other segment in ring
{
//make sure its not the same segment
if(s == s2)
{continue;}
thatSeg = sameXStripSegs[s2];
if(thatSeg->trailingSeg)//already connected to a trailing segment...
continue;
thatPoint = &thatSeg->p1;//to the first point of "that" segment
if(IsZero(Distance2D(*thisPoint, *thatPoint),0.03))//they are close enough to each other
{
potentialLeadSegs.push_back(thatSeg);
}
}
//////////////////////////////////////
//sort through and pick from the potential pile
//we want to pick a segment with the sharpest change in direction!
//
//
//1>>>>>>>>>A>>>>>>>>2 1>>>>>>>>B>>>>>>>>>2
// ^
// large delta angle/ Right Wieghted
minDist = 100000.0;
finalLeadSeg = NULL;
potentialangle = 0.0;
for(potential = 0; potential < potentialLeadSegs.size(); potential++)
{
thatSeg = potentialLeadSegs[potential];
//potentialDot = (thisSeg->normal.x() * thatSeg->normal.x()) + (thisSeg->normal.y() * thatSeg->normal.y()); //gives a number indicating how sharp the angle is, -1 is the sharpest (-1,1)
//potentialCross = (thisSeg->normal.x() * thatSeg->normal.y()) - (thisSeg->normal.y() * thatSeg->normal.x());//gives a number indicating a right or left turn. (uphill is positive), (downhill is negative) (-1,1)
potentialDist = Distance2D(thisSeg->p2, thatSeg->p1);
if(potentialDist < minDist)
{
minDist = potentialDist;
finalLeadSeg = potentialLeadSegs[potential];
}
}
if(finalLeadSeg)
{
thisSeg->leadingSeg = finalLeadSeg;
finalLeadSeg->trailingSeg = thisSeg;
thisSeg->p2 = finalLeadSeg->p1;
thisSeg->FormNormal();
}
}
}
int Loop::CorrectDoubleBacks()
{
int numDoubleBacks = 0;
unsigned int s;
double normalsDot;
std::vector<Segment*> keepList;
Segment* thisSeg;
Segment* thatSeg;
if(segListp.size() <= 3)
{
return 0;
}
//first we should find some double backs....
for(s = 0; s < segListp.size(); s++)
{
if(segListp[s]->chucked)
{
continue;//if segments already have been thrown
}
thisSeg = segListp[s];
thatSeg = thisSeg->leadingSeg;
//get dot product
normalsDot = (thisSeg->normal.x() * thatSeg->normal.x()) + (thisSeg->normal.y() * thatSeg->normal.y());
if(normalsDot < -0.999)//doubleback (1-Dot)*2*180 = Degrees freedom, current(-0.999) = 0.36 degrees
{
numDoubleBacks++;
//compute length of thisSeg and thatSeg
//thislength = Distance2D(thisSeg->p1, thisSeg->p2);
//thatlength = Distance2D(thatSeg->p1, thatSeg->p2);
thisSeg->p2 = thatSeg->p2;
thisSeg->FormNormal();
thisSeg->leadingSeg = thatSeg->leadingSeg;
thatSeg->leadingSeg->trailingSeg = thisSeg;
thatSeg->leadingSeg = NULL;
thatSeg->trailingSeg = NULL;
thatSeg->chucked = true;
s = 0;//start from beggining of list again
}
}
if(numDoubleBacks > 0)
{
for(s = 0; s < segListp.size(); s++)
{
if(segListp[s]->chucked)
{
segListp[s]->chucked = false;
}
else
{
keepList.push_back(segListp[s]);
}
}
segListp.clear();
segListp = keepList;
numSegs = segListp.size();
}
return numDoubleBacks;
}
