Entry 158

Tipped objects block only where they lie; every level walked

2026-10-1652mplay

Filescrates/rugrats/src/actors/player.rscrates/rugrats/src/world/game/boxes.rsmod.rscrates/rugrats/tests/play.rs

The walking campaign (levels_walked) found a port bug: an object turned other than about y blocked the body along an endless strip. Box3::depth and crosses took a point into the box's own frame and tested its own x and z only. For a box turned about y that is its outline from above; for one tipped on its side (level 3's templates 526 and 650, things lying on the floor) the axis that now lies across is the box's own y, which was never tested, so the box covered every point along it. Tommy, in level 3 at (116857, 779, 3723), could not run west at all: box 650, at z -28159, 32000 away, sent each step back (traced at the step's resets). Level 6's wheels (spinners turned about z, flat in their own plane) did the same along x.

Box3 now carries an Outline, made where its box is (Outline::of, in world_boxes): for a box turned other than about y, the convex hull of its eight corners seen from above; two points for one edge on. depth is then how far inside the hull's edges (or the distance to the segment), and crosses clips the step against the hull's edges (or meets the segment). A box turned about y keeps its rectangle as before. Made once a frame, not per test: computed per call it took the play tests from 65 s to 346 s. a_tipped_object_blocks_only_where_it_lies holds Tommy's run and every tipped box of level 3 covering its own place and not far off.

The walking campaign now walks every place the tests go, none put:

• Level 5: ride_elevator walks to the deck beside the elevator (level 5's sliding doors, template 843, are passed by the plan: they open as she comes within 5000), onto its middle with the stick, rides it down (ridden, it turns at either end and goes up again), and steps off at the bottom toward the lower deck. float_to floats into room 38: a way over the open cubes (afloat), each cube's middle gone to with the stick across and Cross up, Circle down.
• The walk: a body down off the way (off a ramp's side) plans again at once; 120 frames on the ground with no place passed is stuck (back and forth by a wall had reset the count); up or down a slope the body is turned to the way's heading and the camera put behind (R1), then aimed at the place 600 on along the line (the stick's eight ways drifted off level 6's ramp, 400 wide); a place a step was held out of is banned from every side; with no way, off ahead, back, and to either side in turn; a plan's end within two cells goes on to the spot's own place before the last stride; the planner's room for the body is tested at its middle and half its width as well.
• Level 3: the boss may bite Tommy twice on the way to the switch: back to the aisles, and room 36's cine 86 again on the way in; the test plays it and goes on.

levels_walked (LV picks levels; WALKLOG, WALKTRACE, WALKPATH trace) now ends "not walked (0)".