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); } }