static void HandleNewSegmentJoining(PathDistanceForwardIterator pathIt, PathPatternIterator patternIt, JoiningInfo[] joiningInfo, float halfThickness, float[] segmentLengths)
{
joiningInfo[0] = joiningInfo[1];
joiningInfo[1] = null;
if (!patternIt.IsSolidAt(pathIt.LengthSoFar + segmentLengths[pathIt.CurrentSegment]))
{
return; // The joining center falls outside the pattern, so don't join... period
}
if (pathIt.Closed && pathIt.Segments.Count <= 2)
{
return; // Not enough segments to do proper closing
}
if (pathIt.Closed)
{
JoiningInfo closing;
if ((pathIt.CurrentSegment == 0) || (pathIt.CurrentSegment == pathIt.Segments.Count - 2))
{
closing = ForeseeJoining(
VectorUtils.PathSegmentAtIndex(pathIt.Segments, pathIt.Segments.Count - 2),
VectorUtils.PathSegmentAtIndex(pathIt.Segments, 0),
halfThickness, segmentLengths[pathIt.Segments.Count - 2]);
if (pathIt.CurrentSegment == 0)
{
joiningInfo[0] = closing;
}
else
{
joiningInfo[1] = closing;
return;
}
}
else if (pathIt.CurrentSegment > pathIt.Segments.Count - 2)
{
return;
}
}
else if (pathIt.CurrentSegment >= pathIt.Segments.Count - 2)
{
return;
}
joiningInfo[1] = ForeseeJoining(
VectorUtils.PathSegmentAtIndex(pathIt.Segments, pathIt.CurrentSegment),
VectorUtils.PathSegmentAtIndex(pathIt.Segments, pathIt.CurrentSegment + 1),
halfThickness, segmentLengths[pathIt.CurrentSegment]);
}
static void TessellateRange(
float distance, PathDistanceForwardIterator pathIt, PathPatternIterator patternIt, PathProperties pathProps,
TessellationOptions tessellateOptions, JoiningInfo[] joiningInfo, float[] segmentLengths, float totalLength, int rangeIndex, List <Vector2> verts, List <UInt16> inds)
{
bool startOfLoop = pathIt.Closed && (pathIt.CurrentSegment == 0) && (pathIt.CurrentT == 0.0f);
if (startOfLoop && (joiningInfo[0] != null))
{
GenerateJoining(joiningInfo[0], pathProps.Corners, pathProps.Stroke.HalfThickness, pathProps.Stroke.TippedCornerLimit, tessellateOptions, verts, inds);
}
else
{
var pathEnding = pathProps.Head;
// If pattern at the end will overlap with beginning, use a chopped ending to allow merging
if (pathIt.Closed && rangeIndex == 0 && patternIt.IsSolidAt(pathIt.CurrentT) && patternIt.IsSolidAt(totalLength))
{
pathEnding = PathEnding.Chop;
}
GenerateTip(VectorUtils.PathSegmentAtIndex(pathIt.Segments, pathIt.CurrentSegment), true, pathIt.CurrentT, pathEnding, pathProps.Stroke.HalfThickness, tessellateOptions, verts, inds);
}
float startingLength = pathIt.LengthSoFar;
float unitsRemaining = Mathf.Min(tessellateOptions.StepDistance, distance);
bool endedEntirePath = false;
for (;;)
{
var result = pathIt.AdvanceBy(unitsRemaining, out unitsRemaining);
if (result == PathDistanceForwardIterator.Result.Ended)
{
endedEntirePath = true;
break;
}
else if (result == PathDistanceForwardIterator.Result.NewSegment)
{
if (joiningInfo[1] != null)
{
GenerateJoining(joiningInfo[1], pathProps.Corners, pathProps.Stroke.HalfThickness, pathProps.Stroke.TippedCornerLimit, tessellateOptions, verts, inds);
}
else
{
AddSegment(VectorUtils.PathSegmentAtIndex(pathIt.Segments, pathIt.CurrentSegment), pathIt.CurrentT, pathProps.Stroke.HalfThickness, null, pathIt.SegmentLengthSoFar, verts, inds);
}
HandleNewSegmentJoining(pathIt, patternIt, joiningInfo, pathProps.Stroke.HalfThickness, segmentLengths);
}
if ((unitsRemaining <= Epsilon) &&
!TryGetMoreRemainingUnits(ref unitsRemaining, pathIt, startingLength, distance, tessellateOptions.StepDistance))
{
break;
}
if (result == PathDistanceForwardIterator.Result.Stepped)
{
AddSegment(VectorUtils.PathSegmentAtIndex(pathIt.Segments, pathIt.CurrentSegment), pathIt.CurrentT, pathProps.Stroke.HalfThickness, joiningInfo, pathIt.SegmentLengthSoFar, verts, inds);
}
}
// Ending
if (endedEntirePath && pathIt.Closed)
{
// No joining needed, the start and end of the path should just connect
inds.Add(0);
inds.Add(1);
inds.Add((UInt16)(verts.Count - 2));
inds.Add((UInt16)(verts.Count - 1));
inds.Add((UInt16)(verts.Count - 2));
inds.Add(1);
}
else
{
AddSegment(VectorUtils.PathSegmentAtIndex(pathIt.Segments, pathIt.CurrentSegment), pathIt.CurrentT, pathProps.Stroke.HalfThickness, joiningInfo, pathIt.SegmentLengthSoFar, verts, inds);
GenerateTip(VectorUtils.PathSegmentAtIndex(pathIt.Segments, pathIt.CurrentSegment), false, pathIt.CurrentT, pathProps.Tail, pathProps.Stroke.HalfThickness, tessellateOptions, verts, inds);
}
}