clip_viewport.h

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/*! \file clip_viewport.h
  \brief  The ClipViewportBase class.
 
  \par Copyright Information
 
  Copyright (c) 2009 The DiSTI Corporation.<br>
  11486 Corporate Blvd; Suite 190<br>
  Orlando, Florida 32817<br>
  USA<br>
  <br>
  All rights reserved.<br>
 
  This Software contains proprietary trade secrets of DiSTI and may not be
reproduced, in whole or part, in any form, or by any means of electronic,
mechanical, or otherwise, without the written permission of DiSTI.  Said
permission may be derived through the purchase of applicable DiSTI product
licenses which detail the distribution rights of this content and any
Derivative Works based on this or other copyrighted DiSTI Software.
 
  NO WARRANTY. THE SOFTWARE IS PROVIDED "AS-IS," WITHOUT WARRANTY OF ANY KIND,
AND ANY USE OF THIS SOFTWARE PRODUCT IS AT YOUR OWN RISK. TO THE MAXIMUM EXTENT
PERMITTED BY APPLICABLE LAW, DISTI AND ITS SUPPLIERS DISCLAIM ALL WARRANTIES
AND CONDITIONS, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
IMPLIED WARRANTIES AND CONDITIONS OF MERCHANTABILITY AND/OR FITNESS FOR A
PARTICULAR PURPOSE, TITLE, AND NON-INFRINGEMENT, WITH REGARD TO THE SOFTWARE.
 
  LIMITATION OF LIABILITY. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW,
IN NO EVENT SHALL DISTI OR ITS SUPPLIERS BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
INDIRECT, OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING, WITHOUT LIMITATION,
DAMAGES FOR LOSS OF BUSINESS PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS
INFORMATION, OR ANY OTHER PECUNIARY LOSS) ARISING OUT OF THE USE OF OR
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OF SUCH DAMAGES.  DISTI'S ENTIRE LIABILITY AND YOUR EXCLUSIVE REMEDY SHALL NOT
EXCEED FIVE DOLLARS (US$5.00).
 
  The aforementioned terms and restrictions are governed by the laws of the
State of Florida and the United States of America.
 
*/
#ifndef CLIP_VIEWPORT_H
#define CLIP_VIEWPORT_H
 
#include <GL/glu.h>
#include "component_base.h"
#include "component_light_mgr.h"
 
namespace disti
{
 
class ClipViewportBase : public ComponentBase
{
 
public:
    typedef enum 
    {
      E_LEFT = 0,
      E_RIGHT,
      E_TOP,
      E_BOTTOM,
      E_FRONT,
      E_BACK
    } E_BoxSideEnum;
 
protected:
    bool _active[6];
    
    DisplayObject *_viewportObject;
 
public:
    ClipViewportBase() : ComponentBase(), _viewportObject(NULL)
    {
        for (int i = 0; i < 6; i++)
            _active[i] = false;
    }
 
    virtual ~ClipViewportBase()
    {
    }
 
    virtual void Activate(
        int _1, 
        int _2 = -1,
        int _3 = -1,
        int _4 = -1,
        int _5 = -1,
        int _6 = -1)
    {
        _active[_1] = true;       
        if (_2 != -1) _active[_2] = true;
        if (_3 != -1) _active[_3] = true;
        if (_4 != -1) _active[_4] = true;
        if (_5 != -1) _active[_5] = true;
        if (_6 != -1) _active[_6] = true;
    }
 
    virtual void Deactivate(
        int _1, 
        int _2 = -1,
        int _3 = -1,
        int _4 = -1,
        int _5 = -1,
        int _6 = -1)
    {
        _active[_1] = false;
        if (_2 != -1) _active[_2] = false;
        if (_3 != -1) _active[_3] = false;
        if (_4 != -1) _active[_4] = false;
        if (_5 != -1) _active[_5] = false;
        if (_6 != -1) _active[_6] = false;
 
    }
 
    virtual void SetViewport(DisplayObject *obj)
    {
        _viewportObject = obj;
    }
 
    virtual void Draw()
    {
        if (_viewportObject)
            DrawInViewport();
        else
            ComponentBase::Draw();
    }
 
    virtual void DrawInViewport()
    {
        if (!_visible || Culled() || (_blinking && BlinkedOff()))
            return;
 
        // Setup the viewport variables
 
        float x,y,z,x1,y1,z1;
 
        _viewportObject->GetExtents(x,y,z,x1,y1,z1);
 
        GLdouble eqn[6][4] = 
        {{1.0,  0.0, 0.0, -x}, //E_LEFT 
        {-1.0,  0.0, 0.0, x1},  //E_RIGHT
        {0.0, -1.0, 0.0, y1}, //E_TOP
        {0.0,  1.0, 0.0, -y}, //E_BOTTOM
        {0.0, 0.0, -1.0, z1}, //E_FRONT
        {0.0,  0.0, 1.0, -z} //E_BACK
        };
 
        SetupLighting();
 
        // The PreDraw way
 
        bool pushed = ApplyDynamicRotation();
 
      SaveMatrices(); // Saving a full set.
 
        if(!_parentDisplayFrame) 
        {
            // We are the top level for our dll
            _lightMgr->TopFrameInitialize();
        }
 
        _lightMgr->SetupComponentLighting();
 
        { // Copy/Paste from Group::Draw()
 
         // Set global variable with current texture index to be used
         // by child objects that have no texture index
 
         glColor4ubv(_color.RGBA());
 
            int i;
            int maxPlanes;
            int startPlane;
            int currPlane;
 
            glGetIntegerv(GL_MAX_CLIP_PLANES,&maxPlanes);
 
            for (startPlane = 0; startPlane < maxPlanes; startPlane++)
            {
                if (!glIsEnabled( GL_CLIP_PLANE0 + startPlane))
                {
                    // Found the first non used plane
                    // We will ASSUME the rest are unused
                    break;
                }
            }
            
            currPlane = startPlane - 1;
 
            for (i = 0; i < 6; i++)
            {
                // Turn on our active planes
                if (_active[i])
                {
                    currPlane++;
                    glEnable(GL_CLIP_PLANE0 + currPlane);
                    glClipPlane(GL_CLIP_PLANE0 + currPlane,eqn[i]);
                    if (currPlane + 1 >= maxPlanes)
                    {
#ifdef _DEBUG
                        fprintf(stderr,"Warning: Number of glPlanes exceeded in %s: %d\n",__FILE__,maxPlanes);
#endif
                        break;
                    }
                }
            }
 
         for (unsigned int j=0; j < _objects.Count(); j++)
            _objects[j]->Draw();
 
            // Disable the planes we used
            for (i = startPlane; i <= currPlane; i++)
            {
                glDisable(GL_CLIP_PLANE0 + i);
            }
 
      }
 
        _lightMgr->CleanupComponentLighting();
 
        if(!_parentDisplayFrame) 
        {
            _lightMgr->TopFrameRestore();
        }
 
      if (pushed)
         glPopMatrix();
    }
 
};
 
} //namespace disti
 
#endif