mgcbillboardnode.h

《3D游戏引擎设计》的源码

// Magic Software, Inc.
// http://www.magic-software.com
// Copyright (c) 2000, All Rights Reserved
//
// Source code from Magic Software is supplied under the terms of a license
// agreement and may not be copied or disclosed except in accordance with the
// terms of that agreement.  The various license agreements may be found at
// the Magic Software web site.  This file is subject to the license
//
// RESTRICTED USE SOURCE CODE
// http://www.magic-software.com/License/restricted.pdf

#ifndef MGCBILLBOARDNODE_H
#define MGCBILLBOARDNODE_H

#include "MgcNode.h"
class MgcCamera;


class MgcBillboardNode : public MgcNode
{
    MgcDeclareRTTI;
    MgcDeclareStream;

public:
    // The model space of the billboard has an up-vector of (0,1,0) that is
    // chosen to be the billboard's axis of rotation.  The billboard's plane
    // has normal (0,0,1).

    // construction
    MgcBillboardNode (unsigned int uiQuantity = 1, unsigned int uiGrowBy = 1);

protected:
    // geometric updates
    void RotateBillboard (const MgcCamera* pkCamera);
    virtual void UpdateWorldData (MgcReal fAppTime);

    // drawing
    virtual void Draw (MgcRenderer& rkRenderer);

    // for deferred updates
    MgcReal m_fLastUpdateTime;
};

MgcSmartPointer(MgcBillboardNode);
MgcRegisterStream(MgcBillboardNode);

#endif