Basic "launch" death animation

src/animations.ts

@@ -3,6 +3,7 @@ import Game from './game';
 import { Creature } from './creature';
 import { Hex } from './utility/hex';
 import { Ability } from './ability';
+import { QuadraticCurve } from './utility/curve';
 
 // to fix @ts-expect-error 2554: properly type the arguments for the trigger functions in `game.ts`
 
@@ -12,6 +13,7 @@ type AnimationOptions = {
 	ignoreMovementPoint?: boolean;
 	ignoreTraps?: boolean;
 	ignoreFacing?: boolean;
+	callback?: () => void;
 	callbackStepIn?: (hex?: Hex) => void;
 	pushed?: boolean;
 	turnAroundOnComplete?: boolean;
@@ -307,4 +309,42 @@ export class Animations {
 
 		return [tween, sprite, dist];
 	}
+
+	death(creature: Creature, opts: AnimationOptions) {
+		const game = this.game;
+		const length = 100;
+		const numSegments = 10;
+		const speed = !opts.overrideSpeed ? 500 : opts.overrideSpeed;
+
+		const curve = new QuadraticCurve(0.1, -5, 0);
+
+		const segmentLength = Math.round(length / numSegments);
+		const segmentTime = Math.round(speed / numSegments);
+
+		const startPos = creature.creatureSprite.getPos();
+
+		creature.healthHide();
+
+		let currSegment = 1;
+
+		const anim = () => {
+			if (currSegment > numSegments) {
+				opts.callback();
+				return;
+			}
+
+			let next = {
+				x: startPos.x + segmentLength * currSegment,
+				y: startPos.y + curve.calc_y(segmentLength * currSegment)
+			}
+
+			creature.creatureSprite.setPx(next, segmentTime).then(() => {
+				anim();
+			});
+
+			currSegment++;
+		}
+
+		anim();
+	}
 }

src/creature.ts

@@ -1540,7 +1540,13 @@ export class Creature {
 		}
 
 		// Kill animation
-		this.creatureSprite.setAlpha(0, 500).then(() => this.destroy());
+		//this.creatureSprite.setAlpha(0, 500).then(() => this.destroy());
+		const opts = {
+			callback: () => {this.destroy();}
+		}
+
+		this.creatureSprite.setAlpha(0, 500)
+		game.animations.death(this, opts);
 		this.cleanHex();
 
 		game.updateQueueDisplay();
@@ -1921,6 +1927,10 @@ class CreatureSprite {
 		}
 	}
 
+	getPos() {
+		return this._group.position;
+	}
+
 	hint(text: string, hintType: CreatureHintType) {
 		const tooltipSpeed = 250;
 		const tooltipDisplaySpeed = 500;