Class ChunkBuilder

Inheritance Relationships

Base Type

  • public std::enable_shared_from_this< ChunkBuilder >

Class Documentation

class ChunkBuilder : public std::enable_shared_from_this<ChunkBuilder>

Public Functions

ChunkBuilder(std::shared_ptr<HalfEdgeMesh<BaseVector<float>>> originalMesh, std::shared_ptr<std::unordered_map<unsigned int, std::vector<std::weak_ptr<ChunkBuilder>>>> vertexUse)

ChunkBuilder constructs a chun builder that can create individual chunks.

Parameters:

  • originalMesh – mesh that is being chunked

  • vertexUse – list of ChunkBuilders that for each vertex of the original mesh

~ChunkBuilder()
void addFace(const FaceHandle &index)

assigns a face to the chunk this builder is generating

This adds a face to the face list of this builder. It is used to create a chunk when calling buildMesh.

Parameters:

index – index of face in the original model

void addDuplicateVertex(const VertexHandle &index)

addDuplicateVertex marks a vertex as duplicate

Duplicate vertices will be added to the beginning of the Vertex array of the chunk mesh when calling buildMesh().

Parameters:

index – vertex index of diplicate vertex

MeshBufferPtr buildMesh(MeshBufferPtr attributedMesh, std::shared_ptr<std::unordered_map<unsigned int, unsigned int>> splitVertices, std::shared_ptr<std::unordered_map<unsigned int, unsigned int>> splitFaces) const

buildMesh builds a chunk by generating a new mesh buffer

By calling buildMesh(), the mesh of a new chunk is being created. Before building a chunk, faces need to be added to this builder using the method addFace(index). The vertex buffer of resulting mesh holds the vertices that got duplicated during the chunking process at the first fields of the buffer followed by the normal vertices. If the number of added faces is 0 this function will return an mesh buffer holding no vertices or faces.

Parameters:

  • attributedMesh – original mesh that contains attributes. represents same mesh as m_originalMesh

  • splitVertices – map from new vertex indices to old vertex indices for all faces that have been cut

  • splitFaces – map from new face indices to old face indices for all faces that have been cut

Returns:

mesh of the newly created chunk

unsigned int numFaces() const

numFaces delivers the number of faces for the chunk

This delivers the amount of faces currently added to a ChunkBuilder instance. This functionality is especially useful for checking whether or not a generatec mesh would be empty before calling buildMesh.

Returns:

number of faces added to this builder

unsigned int numVertices() const

numVertices amount of vertices ot the resulting mesh

This delivers the amount of vertices that the resulting mesh would have when calling buildMesh.

Returns:

number of vertices added to this builder