120 lines
3.6 KiB
C++
120 lines
3.6 KiB
C++
// This code is in the public domain -- castanyo@yahoo.es
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#pragma once
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#ifndef NV_MESH_MESHBUILDER_H
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#define NV_MESH_MESHBUILDER_H
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#include "nvmesh.h"
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#include "nvcore/Array.h"
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#include "nvmath/Vector.h"
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namespace nv
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{
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class String;
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class TriMesh;
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class QuadTriMesh;
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namespace HalfEdge { class Mesh; }
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/// Mesh builder is a helper class for importers.
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/// Ideally it should handle any vertex data, but for now it only accepts positions,
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/// normals and texcoords.
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class MeshBuilder
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{
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NV_FORBID_COPY(MeshBuilder);
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NV_FORBID_HEAPALLOC();
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public:
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MeshBuilder();
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~MeshBuilder();
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// Builder methods.
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uint addPosition(const Vector3 & v);
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uint addNormal(const Vector3 & v);
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uint addTexCoord(const Vector2 & v, uint set = 0);
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uint addColor(const Vector4 & v, uint set = 0);
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void beginGroup(uint id);
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void endGroup();
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uint addMaterial(const char * name);
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void beginMaterial(uint id);
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void endMaterial();
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void beginPolygon(uint id = 0);
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uint addVertex(uint p, uint n = NIL, uint t0 = NIL, uint t1 = NIL, uint c0 = NIL, uint c1 = NIL, uint c2 = NIL);
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uint addVertex(const Vector3 & p);
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//uint addVertex(const Vector3 & p, const Vector3 & n, const Vector2 & t0 = Vector2(0), const Vector2 & t1 = Vector2(0), const Vector4 & c0 = Vector4(0), const Vector4 & c1 = Vector4(0));
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bool endPolygon();
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uint weldPositions();
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uint weldNormals();
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uint weldTexCoords(uint set = 0);
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uint weldColors(uint set = 0);
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void weldVertices();
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void optimize(); // eliminate duplicate components and duplicate vertices.
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void removeUnusedMaterials(Array<uint> & newMaterialId);
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void sortFacesByGroup();
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void sortFacesByMaterial();
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void done();
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void reset();
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// Hints.
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void hintTriangleCount(uint count);
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void hintVertexCount(uint count);
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void hintPositionCount(uint count);
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void hintNormalCount(uint count);
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void hintTexCoordCount(uint count, uint set = 0);
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void hintColorCount(uint count, uint set = 0);
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// Helpers.
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void addTriangle(uint v0, uint v1, uint v2);
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void addQuad(uint v0, uint v1, uint v2, uint v3);
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// Get result.
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TriMesh * buildTriMesh() const;
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QuadTriMesh * buildQuadTriMesh() const;
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enum Error {
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Error_None,
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Error_NonManifoldEdge,
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Error_NonManifoldVertex,
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};
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HalfEdge::Mesh * buildHalfEdgeMesh(bool weldPositions, Error * error = NULL, Array<uint> * badFaces = NULL) const;
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bool buildPositions(Array<Vector3> & positionArray);
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bool buildNormals(Array<Vector3> & normalArray);
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bool buildTexCoords(Array<Vector2> & texCoordArray, uint set = 0);
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bool buildColors(Array<Vector4> & colorArray, uint set = 0);
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void buildVertexToPositionMap(Array<int> & map);
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// Expose attribute indices of the unified vertex array.
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uint vertexCount() const;
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uint positionCount() const;
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uint normalCount() const;
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uint texCoordCount(uint set = 0) const;
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uint colorCount(uint set = 0) const;
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uint materialCount() const;
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const char * material(uint i) const;
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uint positionIndex(uint vertex) const;
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uint normalIndex(uint vertex) const;
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uint texCoordIndex(uint vertex, uint set = 0) const;
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uint colorIndex(uint vertex, uint set = 0) const;
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private:
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struct PrivateData;
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PrivateData * d;
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};
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} // nv namespace
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#endif // NV_MESH_MESHBUILDER_H
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