Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 4x 4x 4x 4x 4x 4x 4x 2x 2x 2x 2x 4x 4x 4x 4x 3x 3x 3x 4x 4x 4x 4x 4x 3x 3x 3x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x | // Animations targeting SectorElement (and its ArcElement subclass).
// See ../Animations.ts for the abstract base + registry mechanics.
import {Animation, AllAnimations, IAnimationStep, registerAnimation} from "../Animations";
import {GeomElement} from "../GeomElement";
import {Slate} from "../../Slate";
import {SectorElement} from "./SectorElement";
// Same sweep rate as Circle.compass so an angle arc feels like the
// same instrument; a typical quarter-turn marker (~π/2) sweeps in
// ~500 ms. Min duration keeps a narrow angle from blinking past.
const DEFAULT_SWEEP_RATE_RAD_PER_MS = 0.003;
const MIN_SWEEP_MS = 250;
const DEFAULT_SECTOR_FILL_MS = 500;
// A.Sector.sweep — the arc grows from the A arm toward the B arm by
// driving drawProgress. Duration = drawn sweep / rate.
//
// Args: `reverse: true` grows it from the B arm toward A instead — the
// same arc, traced the other way — for a walk that wants the sweep to
// start at a particular arm without re-ordering the sector (#172).
//
// Two-step when the sector has a face (sweep then face fade-in,
// mirroring Circle.compass); a face-less sector skips the fill step
// entirely (#81 pattern) — which is the common case for zero-color
// angle markers that render gold only while animating.
export class SectorSweepAnimation extends Animation {
public animationMethod = AllAnimations.SECTOR_SWEEP;
public name = "Sector.sweep";
public elementType = SectorElement;
public defaultRate = DEFAULT_SWEEP_RATE_RAD_PER_MS;
public defaultDurationMs = DEFAULT_SECTOR_FILL_MS;
public build(target: GeomElement, slate: Slate, args: any): IAnimationStep[] {
const sector = target as SectorElement;
// arcSpan() reflects what's actually drawn (the major arc for a
// reflex marker), so the duration matches the visible sweep.
const arcAngle = sector.arcSpan();
const sweepMs = Math.max(MIN_SWEEP_MS, arcAngle / this.defaultRate);
const reverse = !!(args && args.reverse === true);
const fullRestore = () => {
sector.faceAlpha = 1;
sector.drawProgress = 1;
sector.sweepReverse = false;
sector.visible = true;
};
const sweep: IAnimationStep = {
durationMs: sweepMs,
setup: () => {
sector.faceAlpha = 0;
sector.drawProgress = 0;
sector.sweepReverse = reverse;
},
tick: (progress) => { sector.drawProgress = progress; },
finalise: () => { sector.drawProgress = 1; sector.sweepReverse = false; },
};
if (sector.faceColor == null) {
sweep.finalise = fullRestore;
return [sweep];
}
const fillMs = Math.min(sweepMs / 2, this.defaultDurationMs);
return [
sweep,
{
durationMs: fillMs,
tick: (progress) => { sector.faceAlpha = progress; },
finalise: fullRestore,
},
];
}
}
registerAnimation(new SectorSweepAnimation());
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