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    2D Geometry Tools API Reference

    Get center of a triangle

    const getTriangleCenter = Fig.getTriangleCenter;

    const center = getTriangleCenter([0, 0], [1, 0], [0, 1]);
    console.log(center);
    // Point {x: 0.3333333333333333, y: 0.3333333333333333}

    Get the minimum absolute angle difference between two angles

    number

    const minAngleDiff = Fig.minAngleDiff;
    const d1 = minAngleDiff(0.1, 0.2);
    console.log(d1);
    // -0.1

    const d2 = minAngleDiff(0.2, 0.1);
    console.log(d2);
    // 0.1

    const d3 = minAngleDiff(0.1, -0.1);
    console.log(d3);
    // 0.2

    Clip and angle between 0 and 2π ('0to360') or -π to π ('-180to180'). null will return the angle between -2π to 2π.

    • angleToClip: number
    • clipTo: '0to360' | '-180to180' | null | '-360to360' | '-360to0'

    number

    const clipAngle = Fig.clipAngle

    const a1 = clipAngle(Math.PI / 2 * 5, '0to360');
    console.log(a1);
    // 1.5707963267948966

    const a2 = clipAngle(Math.PI / 4 * 5, '-180to180');
    console.log(a2);
    // -2.356194490192345

    const a3 = clipAngle(-Math.PI / 4 * 10, null);
    console.log(a3);
    // -1.5707963267948966

    Normalize angle to between 0 and 2π.

    number

    Get angle delta based on direction

    number

    Get delta angle of a Point where the x, y, z components are rotations around the x, y, and z axes.

    Point

    Returns the angle from the line (p1, p2) to the line (p1, p3) in the positive rotation direction and normalized from 0 to Math.PI * 2.

    number

    const threePointAngle = Fig.threePointAngle;
    const getPoint = Fig.getPoint;

    const p1 = threePointAngle(getPoint([1, 0]), getPoint([0, 0]), getPoint([0, 1]));
    console.log(p1);
    // 1.5707963267948966

    const p2 = threePointAngle(getPoint([0, 1]), getPoint([0, 0]), getPoint([1, 0]));
    console.log(p2);
    // 4.71238898038469

    Returns the minimum angle from the line (p1, p2) to the line (p1, p3).

    number

    const threePointAngleMin = Fig.threePointAngleMin;
    const getPoint = Fig.getPoint;

    const p1 = threePointAngleMin(getPoint([1, 0]), getPoint([0, 0]), getPoint([0, 1]));
    console.log(p1);
    // 1.5707963267948966

    const p2 = threePointAngleMin(getPoint([0, 1]), getPoint([0, 0]), getPoint([1, 0]));
    console.log(p2);
    // -1.5707963267948966

    Polar coordinates to cartesian coordinates conversion

    const polarToRect = Fig.polarToRect;
    const p = polarToRect(Math.sqrt(2), Math.PI / 4);
    console.log(p);
    // Point {x: 1, y: 1)

    Cartesian coordinates to polar coordinates conversion

    { angle: number, mag: number, phi: number, r: number, theta: number, }

    const rectToPolar = Fig.rectToPolar;
    const p = rectToPolar(0, 1);
    console.log(p);
    // {mag: 1, angle: 1.5707963267948966}

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    2D Geometry Tools API Reference