Mixed Shape Resting Contact

Mixed primitive contacts settle cleanly without obvious interpenetration drift.

CoreBuyer-critical

engine captureadaptive proof playback · event-aware · no synthetic interpolationpublic proof

adaptive proof artifact · public / event / debug

Mixed primitive contacts settle cleanly without obvious interpenetration drift.

42 bodies~0.21 ms refmatch

What you are seeing

Scene

A mixed-contact table-top style setup designed to expose shape-handling issues quickly.

Why it matters

Exercise stable contact across boxes, spheres, and capsules in one resting-contact scene.

Pass condition

Bodies should settle and remain plausible under repeated stepping.

Proof views

Use Public proof for the clean buyer-facing read, Event focus for adaptive slowdowns around the key moment, and Debug proof for contact cues, overlays, frame numbers, and proof-lane instrumentation.

Metrics strip

ref step time~0.21 ms ref

body count42 bodies

constraint count116 constraints

dt1/60 s

iterations20 solver iters

proof statusmatch

platformWindows x64 / MSVC

benchmark notereference scene

Technical drawer

Command / source path

build\bin\examples\minimal_3d.exe

Systems exercised

collision pipeline
shape contact generation
contact persistence

Known limitations

A simple scene intended for clarity, not maximum load.

Recommended context

Good early-pass evidence for integrators who want to see practical contact quality before deeper scenes.

Determinism status

same build: expected in deterministic mode
cross-run: reference scene for repeated-run inspection
cross-platform: validate per platform lane
snapshot / restore: not primary here

Related proof

Box Stack Stability

Stable stack under repeated runs with consistent contact resolution.

View test

Friction Ramp Comparison

Material tuning produces readable, repeatable sliding behavior.

View test

CCD Tunnel Prevention

Fast-moving bodies preserve contact intent under CCD-enabled conditions.

View test