Function getDistanceFieldParams

source/MRVoxels/MRWeightedPointsShell.cpp:23–54

{

DistanceVolumeCreationParams getDistanceFieldParams( const Box3f& bbox, const ParametersMetric& params )
{
    const auto box = bbox.expanded( Vector3f::diagonal( params.offset + params.dist.maxWeight ) );
    const auto [origin, dimensions] = calcOriginAndDimensions( box, params.voxelSize );
    const auto minDist = params.offset - params.numLayers * params.voxelSize;
    const auto maxDist = params.offset + params.numLayers * params.voxelSize;

    // bidirDist = abs( dist + w ) - w
    const auto maxBidirDist = std::max( std::abs( maxDist + params.dist.maxWeight ),
                                   std::abs( minDist + params.dist.minWeight ) ) - params.dist.minWeight;

    const auto minBidirDist = ( std::signbit( maxDist + params.dist.maxWeight ) == std::signbit( minDist + params.dist.minWeight ) ) ?
        ( std::min( std::abs( maxDist + params.dist.minWeight ),
                    std::abs( minDist + params.dist.maxWeight ) ) - params.dist.maxWeight )
        : -params.dist.maxWeight;
    
    return DistanceVolumeCreationParams
    {
        .vol =
        {
            .origin = origin,
            .voxelSize = Vector3f::diagonal( params.voxelSize ),
            .dimensions = dimensions,
        },
        .dist =
        {
            params.dist,
            minBidirDist,
            maxBidirDist
        }
    };
}

MarchingCubesParams getMarchingCubesParams( const Box3f& bbox, const ParametersMetric& params )
{