spline_window.cpp

来自「ncbi源码」· C++ 代码 · 共 314 行

/*
 * ===========================================================================
 * PRODUCTION $Log: spline_window.cpp,v $
 * PRODUCTION Revision 1000.1  2004/06/01 20:52:43  gouriano
 * PRODUCTION PRODUCTION: UPGRADED [GCC34_MSVC7] Dev-tree R1.3
 * PRODUCTION
 * ===========================================================================
 */

/*  $Id: spline_window.cpp,v 1000.1 2004/06/01 20:52:43 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 "spline_window.hpp"
#include <gui/opengl/gldlist.hpp>
#include <gui/opengl/glutils.hpp>
#include <gui/opengl/geometry.hpp>
#include <FL/glut.H>

BEGIN_NCBI_SCOPE


CSplineWindow::CSplineWindow(int x, int y, int w, int h, const char* label)
    : CGlCanvas3d(x, y, w, h)
    , m_State(eNormal)
    , m_Flags(fRenderLines | fRenderControlPoints)
    , m_Arcball(CVect3<float>(0.0f, 0.0f, 0.0f), 2.0f)
    , m_TargetDistance(10.0f)
    , m_LastMouseX(0)
    , m_LastMouseY(0)
{
    m_Arcball.Resolution(w, h);

    m_Curve.SetPoint(0, CVect3<float>(0.0f, 0.0f, 0.0f));
    m_Curve.SetPoint(1, CVect3<float>(1.0f, 0.0f, 0.0f));
    m_Curve.SetPoint(2, CVect3<float>(1.0f, 1.0f, 0.0f));
    m_Curve.SetPoint(3, CVect3<float>(2.0f, 1.0f, 0.0f));
    m_Curve.Recalc();
}


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

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

    //
    // draw something interesting
    //
    glColor3f(1.0f, 1.0f, 1.0f);
    if (m_Flags & fRenderLines) {
        m_Curve.Draw(CGlCurve<CCurveBezier>::eRender_Lines);
    }

    if (m_Flags & fRenderPoints) {
        m_Curve.Draw(CGlCurve<CCurveBezier>::eRender_Points);
    }

    if (m_Flags & fRenderControlPoints) {

        glColor3f(1.0f, 0.0f, 0.0f);
        glBegin(GL_LINE_STRIP);
        glVertex3fv(m_Curve.GetPoint(0).GetData());
        glVertex3fv(m_Curve.GetPoint(1).GetData());
        glVertex3fv(m_Curve.GetPoint(2).GetData());
        glVertex3fv(m_Curve.GetPoint(3).GetData());
        glEnd();

        glColor3f(0.3f, 0.3f, 1.0f);
        glPointSize(3.0f);
        glBegin(GL_POINTS);
        glVertex3fv(m_Curve.GetPoint(0).GetData());
        glVertex3fv(m_Curve.GetPoint(1).GetData());
        glVertex3fv(m_Curve.GetPoint(2).GetData());
        glVertex3fv(m_Curve.GetPoint(3).GetData());
        glEnd();
    }


    //
    // draw an axis set
    //
    glBegin(GL_LINES);

    glColor3f (1.0f, 0.0f, 0.0f);
    glVertex3f(0.0f, 0.0f, 0.0f);
    glVertex3f(1.0f, 0.0f, 0.0f);

    glColor3f (0.0f, 1.0f, 0.0f);
    glVertex3f(0.0f, 0.0f, 0.0f);
    glVertex3f(0.0f, 1.0f, 0.0f);

    glColor3f (0.0f, 0.0f, 1.0f);
    glVertex3f(0.0f, 0.0f, 0.0f);
    glVertex3f(0.0f, 0.0f, 1.0f);

    glEnd();

    CGlUtils::DumpState();
    CGlUtils::CheckGlError();
}


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


int CSplineWindow::handle(int event)
{
    int curr_x = Fl::event_x();
    int curr_y = Fl::event_y();

    int dx = curr_x - m_LastMouseX;
    int dy = curr_y - m_LastMouseY;
    m_LastMouseX = curr_x;
    m_LastMouseY = curr_y;

    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(dy);
                } else if (Fl::event_ctrl()) {
                    // pan
                    m_State = ePan;
                    x_Pan(dx, dy);
                } 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(dx, dy);
                } else {
                    // end pan
                    m_State = eNormal;
                }
                break;

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

            default:
                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;

            default:
                break;
            }

            return 1;
        }
        break;
    }

    return CGlCanvas3d::handle(event);
}


void CSplineWindow::TogglePoints()
{
    m_Flags ^= fRenderPoints;
}


void CSplineWindow::ToggleLines()
{
    m_Flags ^= fRenderLines;
}


void CSplineWindow::ToggleControlPoints()
{
    m_Flags ^= fRenderControlPoints;
}


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


void CSplineWindow::x_Pan(int dx, int dy)
{
}


void CSplineWindow::x_Zoom(int dy)
{
    m_TargetDistance += m_TargetDistance * (float(dy) / float(y()));
    redraw();
}


END_NCBI_SCOPE


/*
 * ===========================================================================
 * $Log: spline_window.cpp,v $
 * Revision 1000.1  2004/06/01 20:52:43  gouriano
 * PRODUCTION: UPGRADED [GCC34_MSVC7] Dev-tree R1.3
 *
 * Revision 1.3  2004/05/21 22:27:45  gorelenk
 * Added PCH ncbi_pch.hpp
 *
 * Revision 1.2  2004/03/11 20:58:11  ucko
 * Fix calls to Draw.
 *
 * Revision 1.1  2004/03/11 17:39:24  dicuccio
 * Added spline demo project
 *
 * ===========================================================================
 */