Function octEncodeNormal

  • octEncodeNormal(
        array: FloatArrayParam,
        i: number,
        xfunc: string,
        yfunc: string,
    ): Int8Array<any>

  • Oct-encodes a single normal vector (x, y) into a 2-byte representation.

    This function normalizes the 3D normal vector to the 2D oct encoding range and encodes it using a specified math function (xfunc and yfunc are typically 'floor' or 'ceil').

    Parameters

    • array: FloatArrayParam

      The array containing the 3D normal vector.

    • i: number

      The index of the normal vector's x component in the array.

    • xfunc: string

      The math function to apply to the x component ('floor', 'ceil', etc.).

    • yfunc: string

      The math function to apply to the y component ('floor', 'ceil', etc.).

    Returns Int8Array<any>

    The oct-encoded normal vector as a 2-element Int8Array.

    Throws

    If xfunc or yfunc are not valid function names.

    Example

    const normal = new Float32Array([0.5, -0.5, 0.5]);
    const encoded = octEncodeNormal(normal, 0, 'floor', 'ceil');
    console.log(encoded); // Int8Array with encoded normal values

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