Lab 01 · Surface physics
Puck & Ice Friction Physics
Kinetic friction coefficients, stick-to-puck energy transfer and the drag equations that shape every release.
- Friction μk
- 0.004–0.011
- KE at 45 m/s
- 172 J
Physics-based slapshot simulator
Load the stick. Read the goalie. Bury the corner.
Questswatchpatch is an ice hockey shooting lab built on real puck physics. Choose a coordinate inside a regulation 1.83 m × 1.22 m net, build slapshot power, steer the release and watch velocity, launch angle, ice friction and goaltender reaction decide the outcome.
- Top release speed
- 162 km/h
- Ice friction range
- μk 0.004–0.011
- Elite goalie reaction
- 130 ms
Live render: puck glide with frozen particle trail
Live rink simulator
The Slapshot Arena
Every shot is integrated at 500 physics steps per second: aerodynamic drag, kinetic ice friction, gravity, board restitution and a goaltender that perceives, predicts and reacts in real time.
Click inside the net to choose a target, then press and hold to load your slapshot.
- Target: click or tap a coordinate in the net (arrow keys on keyboard).
- Power: keep holding the mouse, right-click, the Hold to Shoot button, or Space.
- Direction: slide the pointer left or right while charging to steer the release.
- Release: let go. Holding beyond 1.6 seconds overwinds the stick and widens scatter.
Post-shot telemetry
- Slapshot Power
- —
- Release Velocity
- —
- Velocity at Net
- —
- Directional Angle
- —
- Launch Angle
- —
- Puck Path Distance
- —
- Ice Friction Loss
- —
- Goalie Reaction
- —
- Shot Result
- Awaiting shot
Shot-accuracy grid
Goals / shots per net zone, viewed from the shooter.
Top L0/0
Top C0/0
Top R0/0
Mid L0/0
Centre0/0
Mid R0/0
Low L0/0
5-hole0/0
Low R0/0
- Shots
- 0
- Goals
- 0
- Goalie save %
- —
- On-net accuracy
- —
- Top speed
- —
- Targets hit
- 0/5
Shot log
- No shots recorded yet. Your last eight attempts appear here.
Physics & analytics library
Five labs behind every slapshot
Each data panel opens a deep-dive into one layer of the simulation engine, with the formulas, coefficients and tactical reads that drive it.
Lab 02 · Goaltending
Goalkeeper AI Reflexes
Angle geometry, butterfly slide timing and the prediction model that decides where the pads and glove go.
- Reaction window
- 130–260 ms
- Lateral slide
- 2.4–3.6 m/s
Lab 03 · Shot selection
Corner Shot Tactics
High and low corner launch angles, five-hole windows and the scatter budget that separates goals from posts.
- High-corner launch
- 7.9°
- Five-hole gap
- 0.22 m
Lab 04 · Collisions
Rebound & Bank Physics
Board cushioning, coefficients of restitution and the mirror-geometry solution used to aim a bank shot.
- Board restitution
- e = 0.62
- Tangential kept
- 90%
Lab 05 · Performance
Hockey Telemetry Lab
Benchmarks, accuracy heat maps and a structured method for turning shot data into measurable skill gains.
- Net zones tracked
- 9
- Metrics per shot
- 9
Under the ice
How the engine decides a shot
No canned animations and no dice rolls for the result. Outcomes emerge from the same equations a physicist would write on a whiteboard.
01
Release solution
Charge time maps to a release speed between 17 and 45 m/s. The engine solves the vertical velocity needed to reach your target height, then adds scatter that grows with the square of power.
vy = (h − y0 + ½·g·t²) / t02
Flight & glide
Airborne pucks decelerate through quadratic drag; grounded pucks lose speed to kinetic ice friction. Boards reflect the puck with a restitution of 0.62 and 90% tangential retention.
a = −k·v² − μk·g03
Goaltender response
After a tier-based reaction delay, the goalie extrapolates the puck to its crease plane, slides laterally, drops into butterfly for low reads and drives the nearest hand toward the predicted point.
x̂ = x + vx·(zg − z)/vz