public void CreateLineLoops()
{
bool[] hasBeenAddedList = new bool[LineSegments.Count];
for (int segmentToAddIndex = 0; segmentToAddIndex < LineSegments.Count; segmentToAddIndex++)
{
if (!hasBeenAddedList[segmentToAddIndex])
{
// now find all the connected segments until we get back to this one
List <Vector2> loopToAdd = new List <Vector2>();
// walk the loop
int currentSegmentIndex = segmentToAddIndex;
LineSegmentFloat currentSegment = LineSegments[currentSegmentIndex];
Vector2 connectionVertex = currentSegment.end;
loopToAdd.Add(connectionVertex);
hasBeenAddedList[currentSegmentIndex] = true;
bool addedToLoop = false;
do
{
bool foundNextSegment = false;
addedToLoop = false;
for (int segmentToCheckIndex = 0; segmentToCheckIndex < LineSegments.Count; segmentToCheckIndex++)
{
LineSegmentFloat segmentToCheck = LineSegments[segmentToCheckIndex];
if (!hasBeenAddedList[segmentToCheckIndex])
{
if (connectionVertex == segmentToCheck.start)
{
connectionVertex = segmentToCheck.end;
foundNextSegment = true;
}
else if (connectionVertex == segmentToCheck.end)
{
connectionVertex = segmentToCheck.start;
foundNextSegment = true;
}
else
{
int i = 0;
}
if (foundNextSegment)
{
hasBeenAddedList[segmentToCheckIndex] = true;
currentSegmentIndex = segmentToCheckIndex;
currentSegment = segmentToCheck;
loopToAdd.Add(connectionVertex);
addedToLoop = true;
break;
}
}
}
} while (addedToLoop);
LineLoops.Add(loopToAdd);
}
}
}
LineSegmentFloat GetInterpolatedSegment(LineSegmentFloat segmentA, LineSegmentFloat segmentB)
{
#if false
float colorAStart = Math.Min(imageToMarch.GetBuffer()[imageToMarch.GetBufferOffsetXY((int)segmentA.start.x, (int)segmentA.start.y)], 1);
float colorAEnd = Math.Min(imageToMarch.GetBuffer()[imageToMarch.GetBufferOffsetXY((int)segmentA.end.x, (int)segmentA.end.y)], 1);
Vector2 directionA = segmentA.end - segmentA.start;
double offsetA = 1 - (colorAEnd + colorAStart) / 2.0;
directionA *= offsetA;
float colorBStart = Math.Min(imageToMarch.GetBuffer()[imageToMarch.GetBufferOffsetXY((int)segmentB.start.x, (int)segmentB.start.y)], 1);
float colorBEnd = Math.Min(imageToMarch.GetBuffer()[imageToMarch.GetBufferOffsetXY((int)segmentB.end.x, (int)segmentB.end.y)], 1);
#else
float colorAStart = imageToMarch.GetBuffer()[imageToMarch.GetBufferOffsetXY((int)segmentA.start.x, (int)segmentA.start.y)];
float colorAEnd = imageToMarch.GetBuffer()[imageToMarch.GetBufferOffsetXY((int)segmentA.end.x, (int)segmentA.end.y)];
Vector2 directionA = segmentA.end - segmentA.start;
double offsetA = 1 - (colorAEnd + colorAStart) / 2.0;
directionA *= offsetA;
float colorBStart = imageToMarch.GetBuffer()[imageToMarch.GetBufferOffsetXY((int)segmentB.start.x, (int)segmentB.start.y)];
float colorBEnd = imageToMarch.GetBuffer()[imageToMarch.GetBufferOffsetXY((int)segmentB.end.x, (int)segmentB.end.y)];
#endif
Vector2 directionB = segmentB.end - segmentB.start;
double ratioB = 1 - (colorBEnd + colorBStart) / 2.0;
directionB *= ratioB;
double offsetToPixelCenter = .5;
LineSegmentFloat segment = new LineSegmentFloat(
(segmentA.start.x + directionA.x) + offsetToPixelCenter,
(segmentA.start.y + directionA.y) + offsetToPixelCenter,
(segmentB.start.x + directionB.x) + offsetToPixelCenter,
(segmentB.start.y + directionB.y) + offsetToPixelCenter);
return(segment);
}
private LineSegmentFloat GetInterpolatedSegment(LineSegmentFloat segmentA, LineSegmentFloat segmentB)
{
#if false
float colorAStart = Math.Min(imageToMarch.GetBuffer()[imageToMarch.GetBufferOffsetXY((int)segmentA.start.x, (int)segmentA.start.y)], 1);
float colorAEnd = Math.Min(imageToMarch.GetBuffer()[imageToMarch.GetBufferOffsetXY((int)segmentA.end.x, (int)segmentA.end.y)], 1);
Vector2 directionA = segmentA.end - segmentA.start;
double offsetA = 1 - (colorAEnd + colorAStart) / 2.0;
directionA *= offsetA;
float colorBStart = Math.Min(imageToMarch.GetBuffer()[imageToMarch.GetBufferOffsetXY((int)segmentB.start.x, (int)segmentB.start.y)], 1);
float colorBEnd = Math.Min(imageToMarch.GetBuffer()[imageToMarch.GetBufferOffsetXY((int)segmentB.end.x, (int)segmentB.end.y)], 1);
#else
float colorAStart = imageToMarch.GetBuffer()[imageToMarch.GetBufferOffsetXY((int)segmentA.start.x, (int)segmentA.start.y)];
float colorAEnd = imageToMarch.GetBuffer()[imageToMarch.GetBufferOffsetXY((int)segmentA.end.x, (int)segmentA.end.y)];
Vector2 directionA = segmentA.end - segmentA.start;
double offsetA = 1 - (colorAEnd + colorAStart) / 2.0;
directionA *= offsetA;
float colorBStart = imageToMarch.GetBuffer()[imageToMarch.GetBufferOffsetXY((int)segmentB.start.x, (int)segmentB.start.y)];
float colorBEnd = imageToMarch.GetBuffer()[imageToMarch.GetBufferOffsetXY((int)segmentB.end.x, (int)segmentB.end.y)];
#endif
Vector2 directionB = segmentB.end - segmentB.start;
double ratioB = 1 - (colorBEnd + colorBStart) / 2.0;
directionB *= ratioB;
double offsetToPixelCenter = .5;
LineSegmentFloat segment = new LineSegmentFloat(
(segmentA.start.x + directionA.x) + offsetToPixelCenter,
(segmentA.start.y + directionA.y) + offsetToPixelCenter,
(segmentB.start.x + directionB.x) + offsetToPixelCenter,
(segmentB.start.y + directionB.y) + offsetToPixelCenter);
return segment;
}