grabowski
5ec164a633
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New route prefab (routes.rhai): cars, buses, motorbikes, cyclists, people, deer or elephants move along waypoints, round a loop or there and back. Each way keeps to the left of the line (or right), corners are rounded into pieces of at most 45 degrees; there-and-back routes become loops with U-turns, so the two directions never share a strip. Engine: Prim::Travel / sprite.begin_travel / script travel(a, b, dur, windows) ... end(): the mover is drawn at a piece's start and slides to its end while it is on that piece, hidden otherwise. The renderer writes keyframes per piece (named by a hash of their content) into one <style> per view. Each piece is its own sprite with the lane strip as its sort extent (ext_reset), mitred at the corners, so movers pass in front of and behind trees, lamps and houses. Movers that look alike and never meet on a piece share one drawing. iso-travel pauses (not hides) in still, reduced-motion and ghosted views. Studio: meta shape "path" draws point by point (snapping like runs) and saves one object with pts; ending on the first point closes the loop. MCP: pts in the object schema, route guidance. Demos: streets gets traffic round the block, a bus, motorbikes, cyclists and strolling people (replacing the one-axis cars); country gets cars on the lane. Tests: Rust 79 (each mover on exactly one piece at every moment, in every rotation), Studio 125, web 99.