Impostor.h
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上传日期:2009-05-26
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- /*
- s_p_oneil@hotmail.com
- Copyright (c) 2000, Sean O'Neil
- All rights reserved.
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are met:
- * Redistributions of source code must retain the above copyright notice,
- this list of conditions and the following disclaimer.
- * Redistributions in binary form must reproduce the above copyright notice,
- this list of conditions and the following disclaimer in the documentation
- and/or other materials provided with the distribution.
- * Neither the name of this project nor the names of its contributors
- may be used to endorse or promote products derived from this software
- without specific prior written permission.
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- POSSIBILITY OF SUCH DAMAGE.
- */
- #ifndef __Impostor_h__
- #define __Impostor_h__
- #include "Texture.h"
- class CImpostor : public C3DObject
- {
- protected:
- CVector m_vDimension; // The dimensions of the 3D bounding box for the object being represented
- CDoubleVector m_vCamera; // The camera position when the impostor was last generated
- CTexture m_tImpostor; // The impostor texture map
- int m_nResolution; // The chosen resolution for the impostor texture map
- CVector m_vUp; // The up vector used to generate the impostor texture
- CVector m_vOffset; // The offset from the original position to draw the billboard
- float m_fMinx, m_fMiny, m_fMaxx, m_fMaxy; // The dimensions of the 2D bounding box for the impostor billboard
- public:
- CImpostor() : C3DObject() {}
- float CalculateError(C3DObject *pCamera);
- bool IsInView(C3DObject *pCamera);
- void InitImpostorRender(C3DObject *pCamera);
- void FinishImpostorRender();
- void Draw(C3DObject *pCamera);
- };
- #endif // __Impostor_h__