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export class TimeController {
constructor(store) {
this.store = store;
this.lastFrameTime = performance.now();
}
tick(now = performance.now()) {
const deltaMs = now - this.lastFrameTime;
this.lastFrameTime = now;
this.store.setState((state) => {
const realElapsedMs = state.time.realElapsedMs + deltaMs;
const plotDeltaMs = state.time.paused ? 0 : deltaMs * state.time.speed;
return {
...state,
time: {
...state.time,
realNowMs: Date.now(),
realElapsedMs,
plotTimeMs: Math.max(0, state.time.plotTimeMs + plotDeltaMs),
},
};
});
return deltaMs;
}
togglePause() {
this.store.setState((state) => ({
...state,
time: {
...state.time,
paused: !state.time.paused,
},
}));
}
setPaused(paused) {
this.store.setState((state) => ({
...state,
time: {
...state.time,
paused,
},
}));
}
setSpeed(speed) {
const clampedSpeed = Math.max(0.1, Math.min(12, speed));
this.store.setState((state) => ({
...state,
time: {
...state.time,
speed: clampedSpeed,
},
}));
}
reset() {
this.store.setState((state) => ({
...state,
time: {
...state.time,
realElapsedMs: 0,
plotTimeMs: 0,
},
plot: {
...state.plot,
hoveredPoint: null,
tooltip: {
...state.plot.tooltip,
visible: false,
point: null,
},
},
}));
this.lastFrameTime = performance.now();
}
}
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