Function zoomIn

src/ChartGPU.ts:702–712

(center, factor)

      coordinator?.setZoomRange(start, end);
    };
    const zoomIn: ZoomState['zoomIn'] = (center, factor) => {
      if (!Number.isFinite(center) || !Number.isFinite(factor) || factor <= 1) return;
      const r = coordinator?.getZoomRange();
      if (!r) return;
      const c = clamp(center, 0, 100);
      const ratio = computeZoomInOutAnchorRatio(r, c);
      const span = r.end - r.start;
      const nextSpan = span / factor;
      const nextStart = c - ratio * nextSpan;
      coordinator?.setZoomRange(nextStart, nextStart + nextSpan);
    };
    const zoomOut: ZoomState['zoomOut'] = (center, factor) => {
      if (!Number.isFinite(center) || !Number.isFinite(factor) || factor <= 1) return;
      const r = coordinator?.getZoomRange();