public LightSource(VectorInt worldPosIndex , byte radius , Color color)
{
    this.radius = (byte)radius;
    this.color = color;

    // Clamp it might go over the edge of world position
    xMin = Helper.ClampInt( worldPosIndex.X - radius , 0 , worldPosIndex.X );
    xMax = Helper.ClampInt( worldPosIndex.X + radius , worldPosIndex.X , World.worldXLength );

    yMin = Helper.ClampInt( worldPosIndex.Y - radius , 0 , worldPosIndex.Y );
    yMax = Helper.ClampInt( worldPosIndex.Y + radius , worldPosIndex.Y , World.worldYLength );

    zMin = Helper.ClampInt( worldPosIndex.Z - radius , 0 , worldPosIndex.Z );
    zMax = Helper.ClampInt( worldPosIndex.Z + radius , worldPosIndex.Z , World.worldZLength );

    // The size of the cube array, +1 for the Light Source Position so it will be when spread >   1  2  3  4  LS   4  3  2  1
    xSize = (xMax-xMin)+1;
    ySize = (yMax-yMin)+1;
    zSize = (zMax-zMin)+1;

    // The index of the Light Source in the cube-array, this is where the spreading/propagation starts.
    xIndex = posInShipData.X-xMin;
    yIndex = posInShipData.Y-yMin;
    zIndex = posInShipData.Z-zMin;

    // Start Spreading. . .
}

private XYZ WorldToIndex( int x , int y , int z )
{
    return new XYZ( x - xMin , y - yMin , z - zMin );
}

private XYZ IndexToWorld( int x , int y , int z )
{
    return new XYZ( xMin + x , yMin + y , zMin + z );
}