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// free data VolumeObject::Free (resultVolume); VolumeObject::Free (volumeObjectA); VolumeObject::Free (volumeObjectB);

工具

The maxon::VolumeToolsInterface provides multiple functions to handle volumes.

Load volumes from files:

• maxon::VolumeToolsInterface::LoadVDBFile() : Loads the volumes from the given file.
• maxon::VolumeToolsInterface::LoadGridIntoVolume() : Loads the grid from the file into the given volume.
• maxon::VolumeToolsInterface::LoadAllGridsIntoVolumes() : Loads all grids from the file.
• maxon::VolumeToolsInterface::GetGridNamesFromFile() : Returns an array of grid names from the given file.
• maxon::VolumeToolsInterface::GetMetaDataFromFile() : Returns metadata from the given vdb file.
• maxon::VolumeToolsInterface::SaveVDBFile() : Saves the volumes to the given file.

另请参阅 maxon::VolumeInterface::CreateFromFile() ( VolumeInterface Manual ).

Volume operations:

• maxon::VolumeToolsInterface::BoolVolumes() : Returns the result of the boolean operation of the two given volumes. See BOOLTYPE .
• maxon::VolumeToolsInterface::MixVolumes() : Returns the result of mixing the two given volumes. See ::MIXTYPE.
• maxon::VolumeToolsInterface::NormalizeVectorVolume() : Returns the normalized vector volume from the given vector volume.
• maxon::VolumeToolsInterface::ApplySDFFilterToVolume() : Returns the filtered volume for the given filter settings. See maxon::SDFFilterSettings .
• maxon::VolumeToolsInterface::ApplyFilterToVolume() : Returns the filtered volume for the given filter settings. See maxon::FilterSettings .
• maxon::VolumeToolsInterface::RotateVectorVolume() : Returns the rotated vector volume.
• maxon::VolumeToolsInterface::MixVectorVolumes() : Returns the result of mixing the given two vector volumes.
• maxon::VolumeToolsInterface::BlendVolumes() : Returns the result of blending the two given volumes.

Volume creation:

• maxon::VolumeToolsInterface::CreateNewFloat32Volume() : Returns a new maxon::Float32 volume.
• maxon::VolumeToolsInterface::CreateNewVector32Volume() : Returns a new maxon::Vector32 volume.
• maxon::VolumeToolsInterface::CreateCurlVolume() : Returns a volume representing the curl of a vector volume.
• maxon::VolumeToolsInterface::CreateMeanCurvatureVolume() : Returns the curvature volume from the given numeric volume.
• maxon::VolumeToolsInterface::MeshToVolume() : Returns the volume for the given PolygonObject .
• maxon::VolumeToolsInterface::PointsToVolume() : Returns the volume for the given points.
• maxon::VolumeToolsInterface::CreateGradientVolume() : Returns a gradient volume from the given volume.
• maxon::VolumeToolsInterface::CreateSphereVolume() : Returns a spherical SDF volume.
• maxon::VolumeToolsInterface::CreatePlatonicVolume() : Returns a SDF volume of a platonic shape.
• maxon::VolumeToolsInterface::ConvertFieldsToVolume() : Returns the volume for the given field. See maxon::FieldSampleData .
• maxon::VolumeToolsInterface::ConvertFieldsToVectorVolume() : Returns a vector volume created from the given field object or field list (see MoGraph 概述 ).
• maxon::VolumeToolsInterface::ConvertVectorToFog() : Returns a fog volume based on the given vector volume.
• maxon::VolumeToolsInterface::CreateMaskFromField() : Returns a volume mask from the given field. See maxon::FieldSampleData .

Volume conversion:

• maxon::VolumeToolsInterface::VolumeToMesh() ：返回 PolygonObject surface for the given volume.
• maxon::VolumeToolsInterface::ResampleVolume() : Returns the resampled volume.
• maxon::VolumeToolsInterface::ConvertSDFToFog() : Returns the fog volume for the given SDF volume.
• maxon::VolumeToolsInterface::ConvertFogToSDF() : Returns the SDF volume for the given fog volume.

// lambda funtion to convert the given PolygonObject to a VolumeRef auto PolyToVolume = []( PolygonObject * const poly) -> maxon::Result<maxon::Volume> { iferr_scope ;

// check polygon object data const 向量 * const points = poly->GetPointR(); const CPolygon * const polys = poly->GetPolygonR(); const maxon::Bool noPoints = points == nullptr ; const maxon::Bool noPolys = polys == nullptr ; if (noPoints || noPolys) return maxon::UnexpectedError( MAXON_SOURCE_LOCATION );

// get polygon object data const Int32 pointCount = poly->GetPointCount(); const Int32 polyCount = poly->GetPolygonCount(); const 矩阵 objectMatrix = poly->GetMg(); const maxon::COLLECTION_RESIZE_FLAGS flags = maxon::COLLECTION_RESIZE_FLAGS::ON_GROW_UNINITIALIZED ;

// point array maxon::BaseArray<maxon::Vector> volPoints; volPoints. Resize (pointCount, flags) iferr_return ;

// copy point data for ( Int32 pointIndex = 0; pointIndex < pointCount; ++pointIndex) volPoints[pointIndex] = objectMatrix * points[pointIndex];

// polygon array maxon::BaseArray<maxon::VolumeConversionPolygon> volPolys; volPolys. Resize (polyCount, flags) iferr_return ;

// copy polygon data for ( Int32 polyIndex = 0; polyIndex < polyCount; polyIndex++) { volPolys[polyIndex] = * reinterpret_cast< const maxon::VolumeConversionPolygon * > (&polys[polyIndex]); if (polys[polyIndex].IsTriangle()) volPolys[polyIndex].SetTriangle(); } const maxon::ThreadInterface * const thread = maxon::ThreadRef::GetCurrentThread ().GetPointer(); if (thread == nullptr ) return maxon::UnexpectedError( MAXON_SOURCE_LOCATION ); const maxon::ThreadRef threadRef = const_cast< maxon::ThreadInterface * > (thread); return maxon::VolumeToolsInterface::MeshToVolume (volPoints, volPolys, objectMatrix, 10.0, 10, 10, threadRef); };

// convert polygon objects to volumes const maxon::Volume volumeA = PolyToVolume(polyObjectA) iferr_return ; const maxon::Volume volumeB = PolyToVolume(polyObjectB) iferr_return ;

// perform bool const maxon::Volume resultVolume = maxon::VolumeToolsInterface::BoolVolumes (volumeA, volumeB, BOOLTYPE::DIFF ) iferr_return ;

// result to mesh PolygonObject * const mesh = maxon::VolumeToolsInterface::VolumeToMesh (resultVolume, 10.0, 10.0) iferr_return ; if (mesh == nullptr ) return maxon ::UnexpectedError( MAXON_SOURCE_LOCATION ); doc->InsertObject(mesh, nullptr , nullptr );

// This example creates a vector volume from the given field object.

// prepare conversion maxon::FieldSampleData sampleData; sampleData. doc = doc; sampleData. fieldList = nullptr ; sampleData. fieldOwner = fieldObject; sampleData. extraTransform = fieldObject-> GetMg (); sampleData. flags = FIELDLAYER_FLAG::NONE ; maxon::Range<maxon::Vector> sampleBox; sampleBox. _minValue = maxon::Vector { -100.0 }; sampleBox. _maxValue = maxon::Vector { 100.0 }; maxon::ThreadRef thread; const maxon::Float gridSize = 10.0;

// convert const maxon::Volume volume = maxon::VolumeToolsInterface::ConvertFieldsToVectorVolume (sampleData, gridSize, sampleBox, thread, nullptr , nullptr ) iferr_return ;

// make volume object VolumeObject * const volumeObject = VolumeObject ::Alloc(); if (volumeObject == nullptr ) return maxon ::OutOfMemoryError( MAXON_SOURCE_LOCATION ); doc->InsertObject(volumeObject, nullptr , nullptr );

// store volume data volumeObject->SetVolume(volume);

延伸阅读

• Volumes Overview
• Commands Manual