Changelog

All notable changes to SafePearl are documented here.

[2.0] — Minecraft 1.21.11

A near-complete rewrite. The original prediction was inaccurate and broke in common situations; v2.0 rebuilds it from verified game physics and adds a full safety toolkit.

🎯 Trajectory — now accurate

• Re-implemented the ender-pearl flight to exactly match Minecraft 1.21.11 physics (verified against the game's own code): correct tick order (gravity → drag → move), spawn at eye-height − 0.1, throw power 1.5.
• Fixed throwing while moving / falling — the pearl now inherits your velocity, so predictions line up when running, sprinting, or mid-air.
• Fixed throwing from water — water drag (0.8) vs air drag (0.99) is applied per tick.
• Added entity collision — predicts when the pearl will strike a mob.

🛡️ Safety assessment

• Blocks deadly throws — if a throw is predicted to kill you (lethal fall, lava, or the void), SafePearl cancels it client-side before the pearl leaves your hand: no pearl spent, no cooldown. Hold sneak to override, with an optional warning sound. Fully toggleable.
• Colour-coded verdict: SAFE / RISKY / DEADLY.
• DEADLY uses your real health + absorption — warns when a throw would actually kill you.
• Void / abyss throws are correctly flagged DEADLY even when the pearl never hits a block.
• Lava and the void are treated as certain death.

❤️ Damage prediction — fully modeled

Predicted damage (in hearts) accounts for:

• The flat 5-damage teleport tax + the vanilla fall-damage formula.
• Slow Falling, Jump Boost, Resistance status effects.
• Feather Falling + Protection enchantments on worn armor.
• Landing surface: water / slime / cobweb / sweet-berry bush / powder snow / scaffolding / ladder (no damage), hay & honey (×0.2), beds (×0.5).
• Creative / Spectator correctly shows 0 damage.

✨ Visuals

• Gradient trajectory trail with optional fade and configurable line width.
• Landing block outline + oriented impact ring on the exact face hit.
• Landing silhouette box at the precise spot you'll stand, with a drop-line for any fall.
• Compact HUD readout under the crosshair: status, damage, distance.
• Entity-hit callout: when the pearl is predicted to strike a mob or player (teleporting you to it rather than where you aimed), the HUD names the target.

⚙️ Configuration

• In-game Mod Menu settings screen (scrolling — never overflows).
• All colours editable via palette buttons; toggles, line width, simulation length, and risky / danger fall-distance sliders (the two stay ordered automatically).
• Reset to defaults button.
• Toggles for the deadly-throw guard, sneak-override, warning sound, and a "hide HUD when safe" option to keep the crosshair clean.
• Toggle keybind (unbound by default) with an action-bar notification.
• Off-hand pearl support; settings persist in config/safepearl.json.

🔧 Technical

• Minecraft 1.21.11, Fabric Loader 0.19.3, Fabric API 0.141.4+1.21.11, Yarn 1.21.11+build.6, Mod Menu 17.0.0.
• Toolchain: Fabric Loom 1.17.12, Gradle 9.6.0, Java 21.
• Performance: one simulation per frame, shared with the HUD; a single entity query over the whole path.
• Migrated off the deprecated HudRenderCallback to the new HudElement / HudElementRegistry API (drawn right after the crosshair layer) — zero deprecation warnings in the build.
• Throw guard cancels client-side via UseItemCallback → ActionResult.FAIL (never sends a packet, never spends a pearl). All prediction is wrapped so a fault can never block a throw or crash the world render. Added a bundled LICENSE and fixed a Gradle 9 build break.

📋 Known limitations

• Pearl camera (picture-in-picture) was investigated but not shipped: 1.21.11's rewritten render pipeline makes a true second-camera view unsafe to build.
• Damage prediction does not currently model armor points (in vanilla they don't reduce fall or ender-pearl damage anyway) and may slightly over-estimate if enchantments can't be read client-side — it always errs on the safe (higher-damage) side.

[1.0] — Minecraft 1.21

• Initial release: basic ender-pearl trajectory line and landing-block highlight.