gl3d_window.cpp

来自「ncbi源码」· C++ 代码 · 共 279 行

/*
 * ===========================================================================
 * PRODUCTION $Log: gl3d_window.cpp,v $
 * PRODUCTION Revision 1000.2  2004/06/01 20:52:29  gouriano
 * PRODUCTION PRODUCTION: UPGRADED [GCC34_MSVC7] Dev-tree R1.7
 * PRODUCTION
 * ===========================================================================
 */

/*  $Id: gl3d_window.cpp,v 1000.2 2004/06/01 20:52:29 gouriano Exp $
 * ===========================================================================
 *
 *                            PUBLIC DOMAIN NOTICE
 *               National Center for Biotechnology Information
 *
 *  This software/database is a "United States Government Work" under the
 *  terms of the United States Copyright Act.  It was written as part of
 *  the author's official duties as a United States Government employee and
 *  thus cannot be copyrighted.  This software/database is freely available
 *  to the public for use. The National Library of Medicine and the U.S.
 *  Government have not placed any restriction on its use or reproduction.
 *
 *  Although all reasonable efforts have been taken to ensure the accuracy
 *  and reliability of the software and data, the NLM and the U.S.
 *  Government do not and cannot warrant the performance or results that
 *  may be obtained by using this software or data. The NLM and the U.S.
 *  Government disclaim all warranties, express or implied, including
 *  warranties of performance, merchantability or fitness for any particular
 *  purpose.
 *
 *  Please cite the author in any work or product based on this material.
 *
 * ===========================================================================
 *
 * Authors:  Mike DiCuccio
 *
 * File Description:
 *
 */

#include <ncbi_pch.hpp>
#include "gl3d_window.hpp"
#include <gui/opengl/gldlist.hpp>
#include <gui/opengl/glutils.hpp>
#include <gui/opengl/geometry.hpp>
#include <FL/glut.H>

BEGIN_NCBI_SCOPE


CGl3dWindow::CGl3dWindow(int x, int y, int w, int h, const char* label)
    : CGlCanvas3d(x, y, w, h)
    , m_Arcball(CVect3<float>(0.0f, 0.0f, 0.0f), 2.0f)
    , m_State(eNormal)
{
    m_Arcball.Resolution(w, h);
}


void CGl3dWindow::draw()
{
    x_DrawBackground(0.2f, 0.2f, 0.4f);
    x_SetupView();

    // misc enables
    glEnable(GL_DEPTH_TEST);
    glEnable(GL_CULL_FACE);
    glEnable(GL_COLOR_MATERIAL);

    // lights
    static GLfloat light_pos[]   = { 20.0f, 20.0f, 5.0f, 1.0f };
    static GLfloat white_light[] = { 1.0f, 1.0f, 1.0f, 1.0f };
    glEnable(GL_LIGHTING);
    glEnable(GL_LIGHT0);
    glLightModelf(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE);
    glLightfv(GL_LIGHT0, GL_POSITION, light_pos);
    glLightfv(GL_LIGHT0, GL_DIFFUSE,  white_light);
    glLightfv(GL_LIGHT0, GL_SPECULAR, white_light);

    // apply our arcball and view transforms
    glTranslatef(0.0f, 0.0f, -40.0f);
    m_Arcball.ApplyGL();

    //
    // draw something interesting
    //

    if (m_Dlist.IsValid()) {
        m_Dlist.Call();
    } else {
        CGlDisplayListCompile COMPILE(m_Dlist,
                                      CGlDisplayList::eCompileAndExecute);

        glPushMatrix();
        glColor3f(1.0f, 0.5f, 0.0f);
        glTranslatef(5.0f, 0.0f, 0.0f);
        CGlGeometry::DrawCylinder(CVect3<float>(0.0f, 0.0f, 0.0f),
                                  CVect3<float>(10.0f, 0.0f, 0.0f),
                                  1.0f, 3, 10);

        //glutSolidTorus(2.0f, 7.0f, 30, 50);
        glPopMatrix();

        glPushMatrix();
        glColor3f(0.0f, 1.0f, 0.0f);
        glTranslatef(-5.0f, 0.0f, 0.0f);
        //glRotatef(90, 1.0f, 0.0f, 0.0f);
        CGlGeometry::DrawCylinder(CVect3<float>(0.0f, 0.0f, 0.0f),
                                  CVect3<float>(0.0f, 10.0f, 0.0f),
                                  1.0f, 3, 10);

        //glutSolidTorus(2.0f, 7.0f, 30, 50);
        glPopMatrix();
    }

    CGlUtils::CheckGlError();
}


void CGl3dWindow::resize(int x, int y, int w, int h)
{
    m_Arcball.Resolution(w, h);
    CGlCanvas3d::resize(x, y, w, h);
}


int CGl3dWindow::handle(int event)
{
    switch (event) {
    case FL_PUSH:
        // always return 1 here - this insures that the FL_MOVE and FL_RELEASE
        // events are registered
        if (Fl::event_button() == 1) {
            return 1;
        }
        break;

    case FL_DRAG:
        if (Fl::event_button() == 1) {
            switch (m_State) {
            case eNormal:
                if (Fl::event_shift()) {
                    // zoom
                    m_State = eZoom;
                    x_Zoom();
                } else if (Fl::event_ctrl()) {
                    // pan
                    m_State = ePan;
                    x_Pan();
                } else {
                    // rotate
                    m_State = eRotate;
                    x_Rotate();
                }
                break;

            case eRotate:
                //
                // rotate - activated on left click-drag
                //
                if ( !Fl::event_shift()  &&  !Fl::event_ctrl()) {
                    x_Rotate();
                } else {
                    // end rotate
                    m_Arcball.EndDrag();
                    m_State = eNormal;
                }
                break;

            case ePan:
                //
                // pan - activated on ctrl-left-click-drag
                //
                if (Fl::event_ctrl()) {
                    x_Pan();
                } else {
                    // end pan
                    m_State = eNormal;
                }
                break;

            case eZoom:
                //
                // zoom - activated on shift-left-click-drag
                //
                if (Fl::event_shift()) {
                    x_Zoom();
                } else {
                    // end pan
                    m_State = eNormal;
                }
                break;
            }

            redraw();
            return 1;
        }
        break;

    case FL_RELEASE:
        if (Fl::event_button() == 1) {
            switch (m_State) {
            case eRotate:
                m_Arcball.Update(Fl::event_x(), Fl::event_y());
                m_Arcball.EndDrag();
                break;

            case eZoom:
            case ePan:
            case eNormal:
                break;
            }

            return 1;
        }
        break;
    }

    return CGlCanvas3d::handle(event);
}


void CGl3dWindow::x_Rotate()
{
    redraw();
    m_Arcball.Update(Fl::event_x(), Fl::event_y());
    if ( !m_Arcball.IsDragging() ) {
        m_Arcball.BeginDrag();
    }
}


void CGl3dWindow::x_Pan()
{
}


void CGl3dWindow::x_Zoom()
{
}


END_NCBI_SCOPE


/*
 * ===========================================================================
 * $Log: gl3d_window.cpp,v $
 * Revision 1000.2  2004/06/01 20:52:29  gouriano
 * PRODUCTION: UPGRADED [GCC34_MSVC7] Dev-tree R1.7
 *
 * Revision 1.7  2004/05/21 22:27:45  gorelenk
 * Added PCH ncbi_pch.hpp
 *
 * Revision 1.6  2004/01/27 18:32:51  dicuccio
 * Don't cull front faces
 *
 * Revision 1.5  2003/12/22 19:23:22  dicuccio
 * Inherit from CDialog.  Added calls to interla geometry processing functions
 *
 * Revision 1.4  2003/09/29 15:44:41  dicuccio
 * Deprecated gui/scope.hpp.  Merged gui/core/types.hpp into gui/types.hpp
 *
 * Revision 1.3  2003/06/10 19:03:09  dicuccio
 * Canonicalize the FL/ headers
 *
 * Revision 1.2  2003/06/09 19:24:19  dicuccio
 * Temporarily deisable code which requires glut
 *
 * Revision 1.1  2003/06/09 19:22:29  dicuccio
 * Initial revision
 *
 * Revision 1.1  2003/06/03 17:41:05  dicuccio
 * Initial revision
 *
 * ===========================================================================
 */