SNMBillboardSpherical.h

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/*********************************************************\
 *  File: SNMBillboardSpherical.h                        *
 *
 *  Copyright (C) 2002-2011 The PixelLight Team (http://www.pixellight.org/)
 *
 *  This file is part of PixelLight.
 *
 *  PixelLight is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Lesser General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  PixelLight 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 Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with PixelLight. If not, see <http://www.gnu.org/licenses/>.
\*********************************************************/


#ifndef __PLSCENE_SCENENODEMODIFIER_BILLBOARDSPHERICAL_H__
#define __PLSCENE_SCENENODEMODIFIER_BILLBOARDSPHERICAL_H__
#pragma once


//[-------------------------------------------------------]
//[ Includes                                              ]
//[-------------------------------------------------------]
#include "PLScene/Scene/SceneNodeModifiers/SNMBillboard.h"


//[-------------------------------------------------------]
//[ Forward declarations                                  ]
//[-------------------------------------------------------]
namespace PLMath {
    class Matrix3x4;
    class Matrix4x4;
}
namespace PLScene {
    class VisNode;
}


//[-------------------------------------------------------]
//[ Namespace                                             ]
//[-------------------------------------------------------]
namespace PLScene {


//[-------------------------------------------------------]
//[ Classes                                               ]
//[-------------------------------------------------------]
/**
*  @brief
*    Spherical (point rotated) billboard scene node modifier class
*
*  @note
*    - The scale of the owner scene node is taken into account
*/
class SNMBillboardSpherical : public SNMBillboard {


    //[-------------------------------------------------------]
    //[ RTTI interface                                        ]
    //[-------------------------------------------------------]
    pl_class(PLS_RTTI_EXPORT, SNMBillboardSpherical, "PLScene", PLScene::SNMBillboard, "Spherical (point rotated) billboard scene node modifier class")
        // Constructors
        pl_constructor_1(ParameterConstructor,  SceneNode&, "Parameter constructor",    "")
        // Slots
        pl_slot_1(OnAddedToVisibilityTree,  VisNode&,   "Called when the owner scene node was added to a visibility tree, visibility node which is representing the owner scene node within the visibility tree as first parameter",    "")
    pl_class_end


    //[-------------------------------------------------------]
    //[ Public functions                                      ]
    //[-------------------------------------------------------]
    public:
        /**
        *  @brief
        *    Constructor
        *
        *  @param[in] cSceneNode
        *    Owner scene node
        */
        PLS_API SNMBillboardSpherical(SceneNode &cSceneNode);

        /**
        *  @brief
        *    Destructor
        */
        PLS_API virtual ~SNMBillboardSpherical();


    //[-------------------------------------------------------]
    //[ Protected virtual SceneNodeModifier functions         ]
    //[-------------------------------------------------------]
    protected:
        PLS_API virtual void OnActivate(bool bActivate) override;


    //[-------------------------------------------------------]
    //[ Private functions                                     ]
    //[-------------------------------------------------------]
    private:
        /**
        *  @brief
        *    Builds a transform matrix
        *
        *  @param[in]  mView
        *    View matrix
        *  @param[in]  mWorld
        *    World matrix
        *  @param[out] mTransform
        *    Receives the new world transform matrix
        */
        void BuildTransformMatrix(const PLMath::Matrix4x4 &mView, const PLMath::Matrix4x4 &mWorld, PLMath::Matrix3x4 &mTransform);

        /**
        *  @brief
        *    Called when the owner scene node was added to a visibility tree
        *
        *  @param[in] cVisNode
        *    Visibility node which is representing the owner scene node within the visibility tree
        */
        void OnAddedToVisibilityTree(VisNode &cVisNode);


};


//[-------------------------------------------------------]
//[ Namespace                                             ]
//[-------------------------------------------------------]
} // PLScene


#endif // __PLSCENE_SCENENODEMODIFIER_BILLBOARDSPHERICAL_H__