zenno/race/stam: beginning of stamina calculator

2026-06-17 19:55:12 -04:00
parent 7085fea1b7
commit 84f4f8e358
3 changed files with 417 additions and 0 deletions
@@ -0,0 +1,136 @@
+import * as math from 'mathjs';
+import { Phase, type Stat, type Surface } from "./race";
+
+export interface Race {
+    location: RaceLocation;
+    length: number;
+    surface: Surface;
+    direction: Direction;
+    spans: Span[];
+    slopes: Slope[];
+    thresholds: [] | [Stat] | [Stat, Stat];
+}
+
+export enum RaceLocation {
+    Sapporo = 'Sapporo',
+    Hakodate = 'Hakodate',
+    Niigata = 'Niigata',
+    Fukushima = 'Fukushima',
+    Nakayama = 'Nakayama',
+    Tokyo = 'Tokyo',
+    Chukyo = 'Chukyo',
+    Kyoto = 'Kyoto',
+    Hanshin = 'Hanshin',
+    Kokura = 'Kokura',
+    Ooi = 'Ooi',
+    Kawasaki = 'Kawasaki',
+    Funabashi = 'Funabashi',
+    Morioka = 'Morioka',
+    Longchamp = 'Longchamp',
+    SantaAnitaPark = 'Santa Anita Park',
+    DelMar = 'Del Mar',
+}
+
+export enum Direction {
+    Right,
+    Left,
+    Stretch,
+}
+
+export enum SpanType {
+    FrontStraight,
+    AcrossStraight,
+    FalseStraight,
+    Corner1,
+    Corner2,
+    Corner3,
+    Corner4,
+}
+
+export interface Span {
+    type: SpanType;
+    span: [number, number];
+}
+
+export interface Slope {
+    per: -2 | -1.5 | -1 | 1 | 1.5 | 2;
+    span: [number, number];
+}
+
+function sortSlopes(slopes: Slope[]): Slope[] {
+    return slopes.toSorted((a, b) => a.span[0] - b.span[0]);
+}
+
+/**
+ * Get the distances into a race where each phase ends.
+ * @param raceLen Length of the race in meters
+ * @returns Quadruple of phase end points, including separate late and last spurt phases
+ */
+export function phases(raceLen: number): [number, number, number, number] {
+    const sixth = raceLen / 6;
+    const half = raceLen / 2;
+    return [sixth, sixth + half, 2*sixth + half, raceLen];
+}
+
+export interface SectionInfo {
+    section: number;
+    phase: Phase;
+    endRate: number;
+    posKeep: boolean;
+    rush: boolean;
+    spotStruggleEnter: boolean;
+}
+
+export const SECTIONS: ReadonlyArray<SectionInfo> = [
+    {section: 1, phase: Phase.EarlyRace, endRate: 1/24, posKeep: true, rush: false, spotStruggleEnter: false},
+    {section: 2, phase: Phase.EarlyRace, endRate: 2/24, posKeep: true, rush: true, spotStruggleEnter: true},
+    {section: 3, phase: Phase.EarlyRace, endRate: 3/24, posKeep: true, rush: true, spotStruggleEnter: true},
+    {section: 4, phase: Phase.EarlyRace, endRate: 4/24, posKeep: true, rush: true, spotStruggleEnter: true},
+    {section: 5, phase: Phase.MidRace, endRate: 5/24, posKeep: true, rush: true, spotStruggleEnter: true},
+    {section: 6, phase: Phase.MidRace, endRate: 6/24, posKeep: true, rush: true, spotStruggleEnter: false},
+    {section: 7, phase: Phase.MidRace, endRate: 7/24, posKeep: true, rush: true, spotStruggleEnter: false},
+    {section: 8, phase: Phase.MidRace, endRate: 8/24, posKeep: true, rush: true, spotStruggleEnter: false},
+    {section: 9, phase: Phase.MidRace, endRate: 9/24, posKeep: true, rush: true, spotStruggleEnter: false},
+    {section: 10, phase: Phase.MidRace, endRate: 10/24, posKeep: true, rush: false, spotStruggleEnter: false},
+    {section: 11, phase: Phase.MidRace, endRate: 11/24, posKeep: false, rush: false, spotStruggleEnter: false},
+    {section: 12, phase: Phase.MidRace, endRate: 12/24, posKeep: false, rush: false, spotStruggleEnter: false},
+    {section: 13, phase: Phase.MidRace, endRate: 13/24, posKeep: false, rush: false, spotStruggleEnter: false},
+    {section: 14, phase: Phase.MidRace, endRate: 14/24, posKeep: false, rush: false, spotStruggleEnter: false},
+    {section: 15, phase: Phase.MidRace, endRate: 15/24, posKeep: false, rush: false, spotStruggleEnter: false},
+    {section: 16, phase: Phase.MidRace, endRate: 16/24, posKeep: false, rush: false, spotStruggleEnter: false},
+    {section: 17, phase: Phase.LateRace, endRate: 17/24, posKeep: false, rush: false, spotStruggleEnter: false},
+    {section: 18, phase: Phase.LateRace, endRate: 18/24, posKeep: false, rush: false, spotStruggleEnter: false},
+    {section: 19, phase: Phase.LateRace, endRate: 19/24, posKeep: false, rush: false, spotStruggleEnter: false},
+    {section: 20, phase: Phase.LateRace, endRate: 20/24, posKeep: false, rush: false, spotStruggleEnter: false},
+    {section: 21, phase: Phase.LateRace, endRate: 21/24, posKeep: false, rush: false, spotStruggleEnter: false},
+    {section: 22, phase: Phase.LateRace, endRate: 22/24, posKeep: false, rush: false, spotStruggleEnter: false},
+    {section: 23, phase: Phase.LateRace, endRate: 23/24, posKeep: false, rush: false, spotStruggleEnter: false},
+    {section: 24, phase: Phase.LateRace, endRate: 24/24, posKeep: false, rush: false, spotStruggleEnter: false},
+];
+
+export interface SectionSlopeSegment extends SectionInfo {
+    startDist: number;
+    endDist: number;
+    slope: -2 | -1.5 | -1 | 0 | 1 | 1.5 | 2;
+}
+
+export function splitSectionSlopes(raceLen: number, slopes: Slope[]): SectionSlopeSegment[] {
+    const ss = sortSlopes(slopes);
+    return SECTIONS.flatMap<SectionSlopeSegment>((sec) => {
+        const startDist = (sec.section - 1) * raceLen / 24;
+        const endDist = sec.section * raceLen / 24;
+        const s = ss.filter((sl) => sl.span[0] < endDist && sl.span[1] > startDist);
+        if (s.length === 0) {
+            return [{...sec, startDist, endDist, slope: 0}];
+        }
+        const r: Array<SectionSlopeSegment> = [{...sec, startDist, endDist: math.min(s[0].span[0], endDist), slope: 0}];
+        for (const [i, sl] of s.entries()) {
+            const slopeEnd = math.min(endDist, sl.span[1]);
+            r.push(
+                {...sec, startDist: math.max(startDist, sl.span[0]), endDist: slopeEnd, slope: sl.per},
+                {...sec, startDist: slopeEnd, endDist: math.min(s[i+1]?.span[0] ?? endDist, endDist), slope: 0},
+            );
+        }
+        return r.filter((sl) => sl.startDist < sl.endDist);
+    })
+}