Reimplementation of CBAttributeMap.GetAtt()

protected CBAttributeMap.MapAttribute Toadicus_GetAtt()
{
    CBAttributeMap BiomeMap = vessel.mainBody.BiomeMap;
    double lat = vessel.latitude * Math.PI / 180d;
    double lon = vessel.longitude * Math.PI / 180d;

    lon -= Math.PI / 2d;

    if (lon < 0f)
    {
        lon = 2f * Math.PI - lon;
    }

    float v = (float)(lat / 3.1415926535897931) + 0.5f;
    float u = (float)(lon / 6.2831853071795862);

    Color pixelBilinear = BiomeMap.Map.GetPixelBilinear (u, v);
    CBAttributeMap.MapAttribute mapAttribute = BiomeMap.defaultAttribute;

    if (BiomeMap.Map != null)
    {
        if (BiomeMap.exactSearch)
        {
            for (int i = 0; i < BiomeMap.Attributes.Length; ++i)
            {
                if (pixelBilinear == BiomeMap.Attributes[i].mapColor)
                {
                    mapAttribute = BiomeMap.Attributes[i];
                }
            }
        }
        else
        {
            float zero = 0;
            float num = 1 / zero;
            for (int j = 0; j < BiomeMap.Attributes.Length; ++j)
            {
                Color mapColor = BiomeMap.Attributes [j].mapColor;
                float sqrMagnitude = ((Vector4)(mapColor - pixelBilinear)).sqrMagnitude;
                if (sqrMagnitude < num)
                {
                    bool testCase = true;
                    if (BiomeMap.nonExactThreshold != -1)
                    {
                        testCase = (sqrMagnitude < BiomeMap.nonExactThreshold);
                    }
                    if (testCase)
                    {
                        mapAttribute = BiomeMap.Attributes[j];
                        num = sqrMagnitude;
                    }
                }
            }
        }
    }

    return mapAttribute;
}