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131 lines
4.4 KiB
C++
131 lines
4.4 KiB
C++
//##################################################################################################
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//
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// Custom Visualization Core library
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// Copyright (C) 2011-2013 Ceetron AS
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//
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// This library may be used under the terms of either the GNU General Public License or
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// the GNU Lesser General Public License as follows:
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//
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// GNU General Public License Usage
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// This library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE.
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//
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// See the GNU General Public License at <<http://www.gnu.org/licenses/gpl.html>>
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// for more details.
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//
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// GNU Lesser General Public License Usage
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// This library is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation; either version 2.1 of the License, or
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// (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE.
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//
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// See the GNU Lesser General Public License at <<http://www.gnu.org/licenses/lgpl-2.1.html>>
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// for more details.
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//
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//##################################################################################################
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#include "cvfBase.h"
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#include "cvfCameraAnimation.h"
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#include "cvfCamera.h"
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#include "cvfTimer.h"
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namespace cvf {
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//==================================================================================================
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///
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/// \class cvf::CameraAnimation
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/// \ingroup Render
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///
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/// Support class for creating a camera path animation from one camera configuration to another.
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///
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//==================================================================================================
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//--------------------------------------------------------------------------------------------------
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/// Configures the animation with start and end point
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//--------------------------------------------------------------------------------------------------
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CameraAnimation::CameraAnimation(const Vec3d& currentPos, const Vec3d& currentDir, const Vec3d& currentUp, const Vec3d& newPos, const Vec3d& newDir, const Vec3d& newUp)
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: m_currentPos(currentPos),
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m_currentDir(currentDir),
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m_currentUp(currentUp),
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m_newPos(newPos),
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m_newDir(newDir),
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m_newUp(newUp),
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m_animDuration(0.75),
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m_animDone(false)
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{
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}
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//--------------------------------------------------------------------------------------------------
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/// Returns the next position in the animation. After the duration of the animation is used up,
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/// the method returns the end point and after that always returns false.
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///
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/// So usage would be:
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/// \code
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/// cvf::Vec3d pos, dir, up;
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/// while(anim.newPosition(&pos, &dir, &up))
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/// {
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/// m_camera->setFromLookAt(pos, pos + dir, up);
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/// repaint();
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/// }
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/// \endcode
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//--------------------------------------------------------------------------------------------------
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bool CameraAnimation::newPosition(Vec3d* pos, Vec3d* dir, Vec3d* up, double* relativeTimeStamp)
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{
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if (m_animDone)
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{
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return false;
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}
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if (m_timer.isNull())
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{
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m_timer = new Timer;
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}
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double timeNow = m_timer->time();
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if (timeNow > m_animDuration)
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{
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*pos = m_newPos;
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*dir = m_newDir;
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*up = m_newUp;
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if (relativeTimeStamp) *relativeTimeStamp = 1.0;
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m_animDone = true;
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return true;
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}
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*pos = m_currentPos + (m_newPos - m_currentPos)*(timeNow/m_animDuration);
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*dir = m_currentDir + (m_newDir - m_currentDir)*(timeNow/m_animDuration);
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*up = m_currentUp + (m_newUp - m_currentUp )*(timeNow/m_animDuration);
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if (relativeTimeStamp) *relativeTimeStamp = timeNow/m_animDuration;
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return true;
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}
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//--------------------------------------------------------------------------------------------------
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/// Sets the duration of the animation
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//--------------------------------------------------------------------------------------------------
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void CameraAnimation::setDuration(double seconds)
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{
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m_animDuration = seconds;
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}
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} // namespace cvf
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