glworldviewer.h

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/****************************************************************************

 File:    glworldviewer.h
 Created: by Aidan Lane, January  26, 2004
 Updated: by Aidan Lane, February 26, 2004
 
 This file is part of Glitch
 Copyright (C) 2003-2004  Monash University, Clayton Campus, Australia
 Created by Aidan Lane, under the supervision of Jon McCormack.
 
 This program was developed to aid the students studying the CSE3313
 Computer Graphics course at Monash University.
 
 This software may contain portions that are copyright (C) 1993,
 Silicon Graphics, Inc. All Rights Reserved.
 
 Glitch 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, version 2.
 
 Glitch 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., 675 Mass Ave, Cambridge, MA 02139, USA.

*****************************************************************************/

#ifndef __GLWORLDVIEWER_H__
#define __GLWORLDVIEWER_H__


#include "3rdparty/qglviewer_subset/qglviewer.h"
#include "glscene.h"
#include "glscreenviewer.h"


class GLWorldViewer : public QGLViewer
{
public:
    GLWorldViewer( const GLScene* s, GLScreenViewer* screenViewer,
        QWidget* parent );
    GLWorldViewer( const GLScene* s, GLScreenViewer* screenViewer,
        const QGLFormat &format, QWidget* parent );

    void resetCamera();

    // The glClear, glFlush and the frustum are all enabled by default
    bool autoGLClearEnabled() const { return autoGLClear; }
    bool autoGLFlushEnabled() const { return autoGLFlush; }
    bool frustumIsDrawn() const { return frustumEnabled; }
    void setDrawFrustum( bool enable ) { frustumEnabled = enable; }
    void setAutoGLClearEnabled( bool enable ) { autoGLClear = enable; }
    void setAutoGLFlushEnabled( bool enable ) { autoGLFlush = enable; }


    qglviewer::Vec backgroundColor() const { return myBackgroundColour; };
    void getBackgroundColor( float& r, float& g, float& b ) const
    {
        r = myBackgroundColour[0];
        g = myBackgroundColour[1];
        b = myBackgroundColour[2];
    }
    void getBackgroundColor( QColor& c ) const
    {
        c.setRgb(
            (int)(myBackgroundColour[0]*255.0),
            (int)(myBackgroundColour[1]*255.0),
            (int)(myBackgroundColour[2]*255.0) );
    };

    void setBackgroundColor( const qglviewer::Vec& color )
        { myBackgroundColour = color; };
    void setBackgroundColor( float r, float g, float b )
        { setBackgroundColor(qglviewer::Vec(r, g ,b)); };
    void setBackgroundColor( const QColor &c ) {
        setBackgroundColor( (float)c.red() / 255.0,
                            (float)c.green() / 255.0,
                            (float)c.blue() / 255.0 );
    };


protected :
    void sharedInit();

    void drawFrustum( GLdouble* inverseProjectionMatrix );

    virtual void init();
    virtual void draw();
    virtual void preDraw();
    virtual void postDraw();

    virtual void keyPressEvent( QKeyEvent* e );
    virtual void keyReleaseEvent( QKeyEvent* e );
    
    virtual void mousePressEvent( QMouseEvent* e );
    virtual void mouseReleaseEvent( QMouseEvent* e );
    virtual void mouseDoubleClickEvent( QMouseEvent* e );
    virtual void mouseMoveEvent( QMouseEvent* e );

    void mouseEventTranslator( QMouseEvent* e, QEvent::Type mouseEventType );

    GLboolean invert( const GLdouble src[16], GLdouble inverse[16] );

    const GLScene* myScene;
    GLScreenViewer* myScreenViewer;
    const GLdouble* myScreenViewersProjection;

    bool reinitRequired;

    qglviewer::Vec myBackgroundColour;
    
    bool autoGLClear;
    bool autoGLFlush;
    bool frustumEnabled;

    int extModifierKey;
};


#endif // __GLWORLDVIEWER_H__

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