zenno: format & lint
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@@ -2,22 +2,22 @@
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* Instantaneous characteristics of a horse in motion.
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*/
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export interface Instant {
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/** Timestamp of the instant. */
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t: number;
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/** Forward position along the course. */
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x: number;
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/** Actual speed. */
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v: number;
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/** Timestamp of the instant. */
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t: number;
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/** Forward position along the course. */
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x: number;
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/** Actual speed. */
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v: number;
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}
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/**
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* Forward travel characteristics under the effects of acceleration.
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*/
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export interface Travel {
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start: Instant;
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end: Instant;
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/** Actual acceleration value applied between start and end. */
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a: number;
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start: Instant;
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end: Instant;
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/** Actual acceleration value applied between start and end. */
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a: number;
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}
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/**
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@@ -30,31 +30,38 @@ export interface Travel {
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* @param decel Negative acceleration value for cases where target speed is below start speed
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* @returns Travel segment after reaching the first of the given limits
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*/
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export function travelSegment(start: Instant, targetSpeed: number, totalAccel: number, maxDur?: number, maxDist?: number, decel?: number): Travel {
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const a = start.v < targetSpeed ? totalAccel : decel ?? -1;
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const dvt = (targetSpeed - start.v) / a;
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const dxt = maxDist != null ? (-start.v + Math.sqrt(start.v*start.v + 4*a*maxDist)) / (2*a) : dvt;
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const time = maxDur != null ? Math.min(dvt, dxt, maxDur) : Math.min(dvt, dxt);
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// To address numerical imprecision, if accel time comes from velocity or distance,
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// set the reached values directly.
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const v = time === dvt ? targetSpeed : start.v + time * a;
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const dist = maxDist != null && time === dxt ? maxDist : (start.v + 0.5 * a * time) * time;
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const end = { t: start.t + time, x: start.x + dist, v };
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return {start, end, a};
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export function travelSegment(
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start: Instant,
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targetSpeed: number,
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totalAccel: number,
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maxDur?: number,
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maxDist?: number,
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decel?: number,
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): Travel {
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const a = start.v < targetSpeed ? totalAccel : (decel ?? -1);
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const dvt = (targetSpeed - start.v) / a;
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const dxt = maxDist != null ? (-start.v + Math.sqrt(start.v * start.v + 4 * a * maxDist)) / (2 * a) : dvt;
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const time = maxDur != null ? Math.min(dvt, dxt, maxDur) : Math.min(dvt, dxt);
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// To address numerical imprecision, if accel time comes from velocity or distance,
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// set the reached values directly.
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const v = time === dvt ? targetSpeed : start.v + time * a;
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const dist = maxDist != null && time === dxt ? maxDist : (start.v + 0.5 * a * time) * time;
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const end = { t: start.t + time, x: start.x + dist, v };
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return { start, end, a };
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}
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/**
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* Acceleration bonus from skills.
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*/
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export interface Skill {
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/**
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* Acceleration modifier in m/s².
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*/
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accel: number;
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/**
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* Remaining actual duration in seconds.
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*/
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dur: number;
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/**
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* Acceleration modifier in m/s².
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*/
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accel: number;
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/**
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* Remaining actual duration in seconds.
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*/
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dur: number;
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}
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/**
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@@ -66,25 +73,25 @@ export interface Skill {
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* @returns Acceleration segments and remainders of skills upon reaching the target speed
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*/
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export function up(start: Instant, targetSpeed: number, baseAccel: number, skills: Skill[]) {
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const segments: Travel[] = [];
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const sk = skills.map((s) => ({...s})).filter((s) => s.dur > 0);
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while (start.v < targetSpeed) {
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const active = sk.filter((s) => s.dur > 0);
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if (active.length === 0) {
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segments.push(travelSegment(start, targetSpeed, baseAccel));
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break;
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}
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const boost = active.reduce((a, s) => a + s.accel, 0);
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const time = Math.min(...active.map((s) => s.dur));
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const seg = travelSegment(start, targetSpeed, baseAccel + boost, time);
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segments.push(seg);
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start = seg.end
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for (const s of active) {
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s.dur -= seg.end.t - seg.start.t;
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if (s.dur < 1e-5) {
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s.dur = 0
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}
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}
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}
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return {segments, skills: sk}
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const segments: Travel[] = [];
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const sk = skills.map((s) => ({ ...s })).filter((s) => s.dur > 0);
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while (start.v < targetSpeed) {
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const active = sk.filter((s) => s.dur > 0);
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if (active.length === 0) {
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segments.push(travelSegment(start, targetSpeed, baseAccel));
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break;
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}
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const boost = active.reduce((a, s) => a + s.accel, 0);
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const time = Math.min(...active.map((s) => s.dur));
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const seg = travelSegment(start, targetSpeed, baseAccel + boost, time);
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segments.push(seg);
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start = seg.end;
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for (const s of active) {
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s.dur -= seg.end.t - seg.start.t;
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if (s.dur < 1e-5) {
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s.dur = 0;
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}
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}
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}
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return { segments, skills: sk };
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}
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@@ -18,7 +18,7 @@ declare const __stage: unique symbol;
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export type Stage = 'raw' | 'base' | 'adjusted' | 'final' | 'skills';
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export type StatValue<T extends Stage> = number & {[__stage]: T};
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export type StatValue<T extends Stage> = number & { [__stage]: T };
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export interface Stats<T extends Stage> {
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speed: StatValue<T>;
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