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/* ----------------------------------------------------------------------- *

 * This file is part of GEL, http://www.imm.dtu.dk/GEL

 * Copyright (C) the authors and DTU Informatics

 * For license and list of authors, see ../../doc/intro.pdf

 * ----------------------------------------------------------------------- */

/**

 * @file draw.h

 * @brief Draw various GEL entities.

 */

#ifndef __GLGRAPHICS_DRAW_H_

#define __GLGRAPHICS_DRAW_H_

#include "../Geometry/TriMesh.h"

#include "../Geometry/AABox.h"

#include "../Geometry/OBox.h"

#include "../Geometry/BoundingINode.h"

#include "../Geometry/BoundingLNode.h"

#include "../Geometry/BoundingTree.h"

namespace HMesh

{

    class Manifold;

}

namespace GLGraphics

{

	/// Draw an indexed face set (just a triangle list) with normals computed on the fly.

	void draw(const Geometry::IndexedFaceSet& geometry);

	/// Draw a triangles mesh. Inefficient function that should be compiled into a display list.

	void draw(const Geometry::TriMesh& tm, bool per_vertex_norms=true);

	/// Load textures if available

	void load_textures(Geometry::TriMesh& tm);	

	/// Draw a HMesh Manifold. Inefficient and should be compiled into display list

	void draw(const HMesh::Manifold& m, bool per_vertex_norms=true);

	/// Draw an axis aligned bounding box

	void draw(const Geometry::AABox& box);

	/// Draw an oriented bounding box

	void draw(const Geometry::OBox& box);

	/// Draw an object of type T which contains only triangles as wireframe. In practice T = Manifold or TriMesh.

	template<typename T>

	inline void draw_triangles_in_wireframe(T& m, bool per_vertex_norms, const CGLA::Vec3f& line_color);

  /// Draw an object of type T as wireframe.  In practice T = Manifold or TriMesh.

	template<class T>

	void draw_wireframe_oldfashioned(const T& m, bool per_vertex_norms, const CGLA::Vec3f& line_color);

	template<class BoxType>

	void draw(const Geometry::BoundingINode<BoxType>& node, int level, int max_level);

	template<class BoxType>

    void draw(const Geometry::BoundingLNode<BoxType>& node, int level, int max_level);

	template<class BoxType>

    void draw(const Geometry::BoundingTree<BoxType>& tree, int max_level = 1e6);

    /// Read depth buffer and extract the depth of a pixel

    bool depth_pick(int x, int y, float& depth);

    /** Convert depth value to 3D point. Supposes that the modelview and projection matrices

     are set in the same way as when rendering. */

    CGLA::Vec3d screen2world(int x, int y, float depth);

}

#endif