lod_node.hpp

//  SuperTuxKart - a fun racing game with go-kart
//  Copyright (C) 2011-2015 Marianne Gagnon
//  based on code Copyright 2002-2010 Nikolaus Gebhardt
//
//  This program is free software; you can redistribute it and/or
//  modify it under the terms of the GNU General Public License
//  as published by the Free Software Foundation; either version 3
//  of the License, or (at your option) any later version.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program; if not, write to the Free Software
//  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
#ifndef HEADER_LOD_NODE_HPP
#define HEADER_LOD_NODE_HPP
 
#include <aabbox3d.h>
#include <matrix4.h>
#include <ISceneNode.h>
#include <vector>
#include <string>
 
namespace irr
{
    namespace scene { class ISceneManager; class ISceneNode; }
}
using namespace irr;
 
#include <set>
#include <memory>
 
namespace irr
{
    namespace scene
    {
        const int ESNT_LOD_NODE = MAKE_IRR_ID('l','o','d','n');
    }
}
 
class LODNode : public scene::ISceneNode
{
private:
    core::matrix4 RelativeTransformationMatrix;
    core::aabbox3d<f32> Box;
 
    std::vector<int> m_detail;
    std::vector<irr::scene::ISceneNode*> m_nodes;
 
    std::set<scene::ISceneNode*> m_nodes_set;
 
    std::string m_group_name;
 
    int m_forced_lod;
 
    int m_current_level;
    bool m_current_level_dirty;
 
    // Distance below which switching between two levels of detail is avoided
    int m_min_switch_distance;
 
    // Area of the bounding box (for autoLOD computation)
    float m_area;
 
    bool m_update_box_every_frame;
    bool m_lod_distances_updated;
public:
 
    LODNode(std::string group_name, scene::ISceneNode* parent, scene::ISceneManager* mgr, s32 id=-1);
    virtual     ~LODNode();
 
    virtual const core::aabbox3d<f32>& getBoundingBox() const { return Box; }
 
    int getLevel();
 
    void updateVisibility();
 
    /*
    virtual core::matrix4& getRelativeTransformationMatrix() { return RelativeTransformationMatrix; }
 
    virtual core::matrix4 getRelativeTransformation() const { return RelativeTransformationMatrix; }
    */
 
    void add(int level, scene::ISceneNode* node, bool reparent);
 
    void autoComputeLevel(float scale);
 
    void forceLevelOfDetail(int n);
 
    scene::ISceneNode* getFirstNode()
    {
        if (m_nodes.size() > 0) return m_nodes[0];
        else                    return NULL;
    }
 
    std::vector<scene::ISceneNode*>& getAllNodes() { return m_nodes; }
    std::set<scene::ISceneNode*>& getNodesSet() { return m_nodes_set; }
 
 
    virtual void OnAnimate(u32 timeMs);
 
    virtual void OnRegisterSceneNode();
    virtual void render();
 
    virtual scene::ESCENE_NODE_TYPE getType() const { return (scene::ESCENE_NODE_TYPE)scene::ESNT_LOD_NODE; }
 
    const std::string& getGroupName() const { return m_group_name; }
};
 
#endif