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CosmoAbdon/DistanceBetweenPoints.ts

Created February 9, 2021 00:26
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  1. CosmoAbdon created this gist Feb 9, 2021.
    30 changes: 30 additions & 0 deletions DistanceBetweenPoints.ts
    View file
    Original file line number Diff line number Diff line change
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    interface location {
    latitude: number,
    longitude: number,
    }

    const getDistanceBetweenTwoPoints = (user: location, company: location): number => {
    const p = 0.017453292519943295; // PI/180 (Evitar re-cálculo)
    const cos = Math.cos;

    const deltaLatitude = ((company.latitude - user.latitude) * p);
    const deltaLongitude = ((company.longitude - user.longitude) * p);
    const sinDeltaLatitude = cos(deltaLatitude)/2;
    const sinDeltaLongitude = ((1 - cos(deltaLongitude))/2);
    const userRadianLatitude = cos(user.latitude * p);
    const companyRadianLatitude = cos(company.latitude * p);

    var a = 0.5 - sinDeltaLatitude + userRadianLatitude * companyRadianLatitude * sinDeltaLongitude;

    return 12742 * Math.asin(Math.sqrt(a)); // O mesmo de fazer ((2 * RaioDaTerra) * ArcoSeno(Raiz(A))
    }

    // Implementação

    const user: location = { latitude: -3.7404223, longitude: -38.5621739 }

    const company: location = { latitude: -3.74037582700665, longitude: -38.55872191910098 }

    const distance = getDistanceBetweenTwoPoints(user, company);

    console.log(distance)