CCD Tunnel Prevention
Fast-moving bodies preserve contact intent under CCD-enabled conditions.
CoreBuyer-critical
CoreBuyer-critical
engine captureadaptive proof playback · event-aware · no synthetic interpolationpublic proof
CCD Tunnel Prevention
Fast-moving bodies preserve contact intent under CCD-enabled conditions.
24 bodies~0.31 ms refmatch
What you are seeing
Scene
A narrow target scene for showing that high-speed traversal does not trivially miss collision events.
Why it matters
Demonstrate continuous collision detection reducing obvious fast-body tunneling cases.
Pass condition
Fast bodies should not obviously phase through the target geometry in the reference setup.
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~0.31 ms ref
body count24 bodies
constraint count64 constraints
dt1/120 s
iterations24 solver iters
proof statusmatch
platformWindows x64 / MSVC
benchmark noteCCD test lane
Technical drawer
Command / source path
build\bin\examples\collision_demo.exe
Systems exercised
- continuous collision detection
- narrowphase
- solver handoff
Known limitations
- CCD behavior depends on scene configuration and target geometry.
Recommended context
Important for gameplay, robotics, and tool scenarios involving fast movers or thin geometry.
Determinism status
- same build: expected
- cross-run: useful for repeated replay capture
- cross-platform: validate separately
- snapshot / restore: supported by broader tooling
Related proof
Mixed Shape Resting Contact
Mixed primitive contacts settle cleanly without obvious interpenetration drift.
View test