Change origin

[I-Am-Umbrella]

Add ability to change pen origin to any of the four corners of the paper.

[alexrudd2]

My best guess as to what's setting the plot origin is here:

saxi/src/planning.ts

Lines 519 to 524 in 3e9ae84

	function constantAccelerationPlan(points: Vec2[], profile: AccelerationProfile): XYMotion {
	const dedupedPoints = dedupPoints(points, epsilon);
	if (dedupedPoints.length === 1) {
	return new XYMotion([new Block(0, 0, 0, dedupedPoints[0], dedupedPoints[0])]);
	}
	const segments = dedupedPoints.slice(1).map((a, i) => new Segment(dedupedPoints[i], a));

[alexrudd2]

Yeah, that guess was totally wrong... but I finally found it!

saxi/src/planning.ts

Line 607 in 8f4e59e

let curPos = { x: 0, y: 0 };

[alexrudd2]

I added a visualization of the origin in ac8251d It's slightly dull now, since it's always at (0, 0)

However, with a different origin it's more useful. Black for emphasis now, will eventually be back to gray.