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Hanif Koh
f1a03dcd49
A scarf joint split the loop at exactly the scarf length, so the remainder of the segment the split landed in became the first flat segment, often a fraction of a millimetre. The seam insertion also leaves segments of a few micrometres at both ends of the loop, which a scarf extrudes through where a plain loop would start or stop. With junction deviation the planner treats such short moves as tight corners, limited by the Z axis acceleration at the end of the ramp, and slows to a third of the wall speed or nearly halts at the seam. Extend the ramp to the next vertex when the remainder would be shorter than half a scarf step, capped at a millimetre, beyond which planners treat a move as ordinary; the scarf only grows, never shrinks. Drop the vertex next to the seam point at either end when that segment is shorter than an eighth of a common line width, so the loop still starts and ends at the seam; a trimmed path loses its arc fitting and prints as line segments. Clamp the scarf length to the trimmed loop so a scarf covering a whole loop still ends at full flow. The descending pass reuses the same path, so both wedges stay consistent, and a flat part that would collapse to a single point is dropped.
OrcaSlicer tests
Building, running and writing tests is documented on the wiki, under How to Test.
Two files here rather than there, because coding agents only read what is in the repository: