Function getFlyToTransitionParams

docs/app/js/sanddance-app.js:80703–80743

(startProps, endProps, opts)

    return Number.isFinite(maxDuration) && duration > maxDuration ? 0 : duration;
}
function getFlyToTransitionParams(startProps, endProps, opts) {
    opts = Object.assign({}, DEFAULT_OPTS, opts);
    const rho = opts.curve;
    const startZoom = startProps.zoom;
    const startCenter = [
        startProps.longitude,
        startProps.latitude
    ];
    const startScale = (0, _webMercatorUtils.zoomToScale)(startZoom);
    const endZoom = endProps.zoom;
    const endCenter = [
        endProps.longitude,
        endProps.latitude
    ];
    const scale = (0, _webMercatorUtils.zoomToScale)(endZoom - startZoom);
    const startCenterXY = (0, _webMercatorUtils.lngLatToWorld)(startCenter);
    const endCenterXY = (0, _webMercatorUtils.lngLatToWorld)(endCenter);
    const uDelta = _vec2.sub([], endCenterXY, startCenterXY);
    const w0 = Math.max(startProps.width, startProps.height);
    const w1 = w0 / scale;
    const u1 = _vec2.length(uDelta) * startScale;
    const _u1 = Math.max(u1, EPSILON);
    const rho2 = rho * rho;
    const b0 = (w1 * w1 - w0 * w0 + rho2 * rho2 * _u1 * _u1) / (2 * w0 * rho2 * _u1);
    const b1 = (w1 * w1 - w0 * w0 - rho2 * rho2 * _u1 * _u1) / (2 * w1 * rho2 * _u1);
    const r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0);
    const r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1);
    const S = (r1 - r0) / rho;
    return {
        startZoom,
        startCenterXY,
        uDelta,
        w0,
        u1,
        S,
        rho,
        rho2,
        r0,
        r1
    };
}

},{"./math-utils":"g3X8f","./web-mercator-utils":"dXGoy","gl-matrix/vec2":"29QfU","@parcel/transformer-js/src/esmodule-helpers.js":"jA2du"}],"69ybw":[function(require,module,exports) {
var parcelHelpers = require("@parcel/transformer-js/src/esmodule-helpers.js");