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#ifndef __INDEXED_FACE_SET_H__
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#define __INDEXED_FACE_SET_H__
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#pragma warning(disable: 4267 4018)
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#include <vector>
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#include "CGLA/Vec3f.h"
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#include "CGLA/Vec3i.h"
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namespace Mesh
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{
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const CGLA::Vec3i NULL_FACE(-1,-1,-1);
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/** This class represents the simplest possible triangle mesh data structure.
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Faces must be triangular, and 3D coordinates are the only values
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associated with the vertices. */
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class IndexedFaceSet
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{
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/// Vertices
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std::vector<CGLA::Vec3f> verts;
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/// Vec3is (which must be triangles)
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std::vector<CGLA::Vec3i> faces;
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public:
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IndexedFaceSet(): verts(0), faces(0) {}
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// ----------------------------------------
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// Functions that operate on faces
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// ----------------------------------------
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/** Add a face and return the index of the new face. If the optional
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idx argument is present, the face array is resized so that the
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new index == idx. */
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int add_face(const CGLA::Vec3i& f, int idx=-1)
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{
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if(idx < 0)
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idx = faces.size();
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faces.resize(idx+1,NULL_FACE);
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faces[idx] = f;
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return idx;
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}
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/// Return the number of faces.
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int no_faces() const {return faces.size();}
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/** Return the face corresponding to a given index. The NULL_FACE
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is returned if the index is out of bounds. */
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const CGLA::Vec3i& face(int idx) const
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{
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if(idx<faces.size())
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return faces[idx];
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return NULL_FACE;
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}
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/// Assign f to a face of index idx
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CGLA::Vec3i& face_rw(int idx)
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{
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return faces[idx];
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}
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// ----------------------------------------
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// Functions that operate on vertices
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// ----------------------------------------
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/// Add a vertex and return the index of the vertex.
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int add_vertex(const CGLA::Vec3f& v)
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{
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int idx= verts.size();
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verts.push_back(v);
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return idx;
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}
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/// Return the number of vertices.
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int no_vertices() const {return verts.size();}
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/** Return the vertex corresponding to a given index. User is responsible
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for bounds checking. */
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const CGLA::Vec3f& vertex(int idx) const
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{
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return verts[idx];
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}
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/// Assign v to a vertex of index idx
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CGLA::Vec3f& vertex_rw(int idx)
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{
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return verts[idx];
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}
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};
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}
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#endif
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