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export interface Spring {  p: number;  v: number;}
export class WaveTank {  springs = [] as Spring[];  waveLength = 100;  k = 0.02;  damping = 0.02;  spread = 0.02;
  constructor() {    for (let i = 0; i < this.waveLength; i++) {      this.springs[i] = {        p: 0,        v: 0,      };    }  }
  update(springs: Spring[]) {    for (const i of springs) {      const a = -this.k * i.p - this.damping * i.v;      i.p += i.v;      i.v += a;    }
    const leftDeltas = [];    const rightDeltas = [];
    for (let t = 0; t < 8; t++) {      for (let i = 0; i < springs.length; i++) {        const prev = springs[(i - 1 + springs.length) % springs.length];        const next = springs[(i + 1) % springs.length];
        leftDeltas[i] = this.spread * (springs[i].p - prev.p);        rightDeltas[i] = this.spread * (springs[i].p - next.p);      }
      for (let i = 0; i < springs.length; i++) {        const prev = springs[(i - 1 + springs.length) % springs.length];        const next = springs[(i + 1) % springs.length];        prev.v += leftDeltas[i];        next.v += rightDeltas[i];        prev.p += leftDeltas[i];        next.p += rightDeltas[i];      }    }  }}