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#ifndef __MINI_MESH_H
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#define __MINI_MESH_H
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#include "IndexedFaceSet.h"
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#include "Material.h"
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#include "Texmap.h"
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namespace Mesh
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{
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/** A Triangle Mesh struct. This struct contains three indexed face sets,
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one for geometry, textures, and normals. It also contains a vector
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of materials and a vector of texture maps.
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A number of functions are defined allowing for rendering of the
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triangle mesh. */
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struct TriMesh
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{
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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 texture maps.
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std::vector<Texmap> texmaps;
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// -------- FUNCTIONS -----------
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/// Get an axis aligned bounding box for the model.
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void get_bbox(CGLA::Vec3f& p0, CGLA::Vec3f& p7) const;
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/// Get a bounding sphere for the model.
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void 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
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{
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return normals.no_faces()>0;
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}
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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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/// Find a texture map from its name
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int find_texmap(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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/// Initialize textures
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void gl_init_textures();
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/// Use material corresponding to idx
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void TriMesh::gl_set_material(int idx);
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/// Draw the mesh using OpenGL.
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void gl_draw();
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};
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/// Load from an OBJ file
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void load_obj(const std::string &filename, TriMesh &mesh);
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}
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#endif
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