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OhDeven Timber Co · simulated physical volition

Tree dynamics lab.

Author six XYZ + rotation saw keyframes—or toggle the aligned sample—then pulse the throttle while the live holding section, load vectors, and tree motion respond.

Illustrative digital twin only. Geometry, force, speed, fiber, and failure outputs are simulated—not operating instructions, an engineering calculation, or a substitute for qualified on-site training and judgment.

Interactive 3D tree-felling physics simulator

01 Single-tree sceneDeterministic seed · fixed-step physics
Ready for frame 01
Growing model tree Loading the 3D physics scene…

The model tree is standing with a 4.6 degree growth lean toward the authored positive Z fall corridor. The first of six saw keyframes is ready.

Run sequence Good-cut workflow

Back-cut throttle

Interlocked
0%

The trigger is enabled only after both back-cut keyframes are locked. Press or hold it to advance the bar. Tree motion automatically releases the trigger and stops the chain. Sound begins only after direct interaction.

Fall playback

Deterministic timeline
Growth lean4.6° +Z Fall corridor+Z / AUTHORED
Center of mass4.80 M Fall angle0.0° Bar / base Ø81 CM / 78 CM Plate / kerf6.5 / 9.0 MM
Camera-relative XYZ

Persistent orthographic tree diagnostics

Face +ZFall-side elevation
Face positive Z diagnostic. Shows the fall-side face cut, active chain rails, hinge width, and trunk profile.

Notch width · rail paths · holding edge

Side −XPerpendicular to lean
Side negative X diagnostic. Shows growth lean, face closure, stump gap, hinge rotation, and fall trajectory.

Lean plane · stump gap · contact

Rear -ZLooking with the lean
Rear negative Z diagnostic. Shows the back-cut chain rail, remaining holding wood, and positive Z fall direction.

Back cut · remaining wood · +Z corridor

Drag to orbit · wheel to zoom · double-click to reset view fall vector mass / force holding wood
02

Cut sequence · locked poses

Keyframe the release.

0 / 6keyframes locked
✓Face validationMeet + release wedgeOffline
→Motion / outcomeStop chain + integrateOffline
03

Face-cut validation

Make the two planes meet.

Top-down stump sectionPLANNED FACE
Waiting for four face keyframesLock entry and apex poses for both planes.
Notch depth
—
Cross-trunk cut width
—
Opening
—
Apex mismatch
—

Educational reference: 30% of trunk diameter sits within the OSHA Logging eTool’s 25–33% face-notch depth range. Exact geometry varies; this is not a universal prescription. OSHA eTool source ↗

What the scene is measuring

Weight becomes direction.

01

Limb-weighted growth lean

The stem, primary limbs, and sparse crown bias move the modeled center of mass toward one visible fall corridor.

02

Continuous kerf + cell fibers

Validated rail sweeps expose real 9 mm-spaced cut surfaces and rebuild the stump and upper-butt caps as material disappears. A 96 × 96 section tracks holding fibers; full-tree voxels are unnecessary for these planar cuts.

03

Motion interlock

The back cut advances only under direct trigger input. Any modeled tree motion releases the throttle before the fall continues.

04

Deterministic replay

Fixed-step center-of-mass motion, rotation, kerf contact, friction impulses, fiber damage, and terrain support can rewind and replay the exact generated outcome.

Do not use this page to plan or perform tree work. Real trees, tools, terrain, defects, weather, and crews require qualified on-site professionals and real safety procedures. OSHA eTools describe recommended practices and do not create new legal requirements. Read the governing logging standard ↗