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/* ----------------------------------------------------------------------- *
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* This file is part of GEL, http://www.imm.dtu.dk/GEL
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* Copyright (C) the authors and DTU Informatics
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* For license and list of authors, see ../../doc/intro.pdf
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* ----------------------------------------------------------------------- */
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/**
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* @file TriMesh.h
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* @brief Triangle mesh class based on indexed face set data structure.
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*/
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#ifndef __GEOMETRY_TRIMESH_H__
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#define __GEOMETRY_TRIMESH_H__
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#include "../CGLA/Mat4x4f.h"
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#include "IndexedFaceSet.h"
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#include "Material.h"
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#include <string.h>
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namespace Geometry
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{
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/** \brief A Triangle Mesh struct.
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This struct contains three indexed face sets, one for geometry,
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textures, and normals. It also contains a vector of materials and a
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vector of texture maps.
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A number of functions are defined allowing for rendering of the triangle
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mesh. */
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class TriMesh
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{
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public:
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// ------- DATA -------
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/// Name of model
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std::string name;
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/// Indexed face set for the actual geometry
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IndexedFaceSet geometry;
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/// Indexed face set for the normals
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IndexedFaceSet normals;
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/// Indexed face set for the texture coordinates.
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IndexedFaceSet texcoords;
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/// Material indices for all faces
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std::vector<int> mat_idx;
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/// Texture indices for all faces
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std::vector<int> tex_idx;
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/// Vector of materials
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std::vector<Material> materials;
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/// Vector of triangle face areas
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std::vector<float> face_areas;
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/// Tabulated cumulative distribution function for sampling triangles according to area
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std::vector<float> face_area_cdf;
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/// Total surface area of the triangle mesh
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float surface_area;
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// -------- FUNCTIONS -----------
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/// Get an axis aligned bounding box for the model.
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bool get_bbox(CGLA::Vec3f& p0, CGLA::Vec3f& p7) const;
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/// Get a bounding sphere for the model.
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bool get_bsphere(CGLA::Vec3f& c, float& r) const;
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/// Returns true if at least one normal has been defined.
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bool has_normals() const { return normals.no_faces() > 0; }
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/// Find a material from its name
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int find_material(const std::string&) const;
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/// Compute normals for the mesh. Does not check if there are normals.
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void compute_normals();
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/// Compute areas for all faces and total surface area.
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void compute_areas();
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/// Apply a transformation matrix to the mesh
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void transform(const CGLA::Mat4x4f& m);
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/// Apply a transformation matrix to the texture coordinates
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void tex_transform(const CGLA::Mat4x4f& m);
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/// Apply a transformation matrix to the texture coordinates associated with a particular material
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void tex_transform(const CGLA::Mat4x4f& m, const std::string& material);
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};
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}
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#endif
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