sgluCamera.hpp Source File

00001 /*****************************************************************************
00002  * SGL: A Scene Graph Library
00003  *
00004  * Copyright (C) 1997-2001  Scott McMillan   All Rights Reserved.
00005  *
00006  * This library is free software; you can redistribute it and/or
00007  * modify it under the terms of the GNU Library General Public
00008  * License as published by the Free Software Foundation; either
00009  * version 2 of the License, or (at your option) any later version.
00010  *
00011  * This library is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014  * Library General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU Library General Public
00017  * License along with this library; if not, write to the Free
00018  * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00019  *****************************************************************************
00020  *     File: sgluCamera.hpp
00021  *  Created: 21 March 1997
00022  *  Summary: base camera class - was dmGLCamera.hpp
00023  *****************************************************************************/
00024 
00025 #ifndef __SGLU_CAMERA_HPP
00026 #define __SGLU_CAMERA_HPP
00027 
00028 #include <sglu.h>
00029 #include <sgluMouse.hpp>
00030 
00031 class SGLU_DLL_API sgluCamera
00032 {
00033 public:
00034    sgluCamera();
00035    virtual ~sgluCamera();
00036 
00037    void reset();
00038 
00039    void setPerspective(GLfloat fov, GLfloat aspect,
00040                        GLfloat near_clip, GLfloat far_clip);
00041    void applyPerspective();
00042 
00043    // set/get/update view functions
00044    void setViewMat(GLfloat mat[4][4]);
00045    void getViewMat(GLfloat mat[4][4]);
00046    void updateViewMat(GLfloat delta_mat[4][4]);
00047 
00048    // functions for subclasses to build on
00049    virtual void update(sgluMouse *) {};
00050    virtual void applyView();
00051 
00052 private: // not implemented
00053    sgluCamera(const sgluCamera&);
00054    sgluCamera &operator=(const sgluCamera&);
00055 
00056 protected:
00057    GLfloat m_fov;                     // field of view angle, degrees
00058    GLfloat m_aspect;
00059    GLfloat m_near_clip, m_far_clip;   // near and far clipping planes
00060 
00061    GLfloat m_view_mat[4][4];   // eyepoint position and orientation wrt scene.
00062 };
00063 
00064 #endif