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InteractiveCamera.cpp
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InteractiveCamera.cpp
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/******************************************************************************
* SOFA, Simulation Open-Framework Architecture *
* (c) 2006 INRIA, USTL, UJF, CNRS, MGH *
* *
* This program is free software; you can redistribute it and/or modify it *
* under the terms of the GNU Lesser General Public License as published by *
* the Free Software Foundation; either version 2.1 of the License, or (at *
* your option) any later version. *
* *
* This program 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 Lesser General Public License *
* for more details. *
* *
* You should have received a copy of the GNU Lesser General Public License *
* along with this program. If not, see <http://www.gnu.org/licenses/>. *
*******************************************************************************
* Authors: The SOFA Team and external contributors (see Authors.txt) *
* *
* Contact information: contact@sofa-framework.org *
******************************************************************************/
#include <SofaBaseVisual/InteractiveCamera.h>
#include <sofa/core/visual/VisualParams.h>
#include <sofa/core/ObjectFactory.h>
namespace sofa
{
namespace component
{
namespace visualmodel
{
int InteractiveCameraClass = core::RegisterObject("InteractiveCamera")
.add< InteractiveCamera >()
;
InteractiveCamera::InteractiveCamera()
:p_zoomSpeed(initData(&p_zoomSpeed, (double) 250.0 , "zoomSpeed", "Zoom Speed"))
,p_panSpeed(initData(&p_panSpeed, (double) 0.1 , "panSpeed", "Pan Speed"))
,p_pivot(initData(&p_pivot, 2 , "pivot", "Pivot (0 => Camera lookAt, 1 => Camera position, 2 => Scene center, 3 => World center"))
,currentMode(InteractiveCamera::NONE_MODE)
,isMoving(false)
{
}
InteractiveCamera::~InteractiveCamera()
{
}
void InteractiveCamera::internalUpdate()
{
}
void InteractiveCamera::moveCamera(int x, int y)
{
Quat newQuat;
const unsigned int widthViewport = p_widthViewport.getValue();
const unsigned int heightViewport = p_heightViewport.getValue();
if (isMoving)
{
if (currentMode == TRACKBALL_MODE)
{
float x1 = (2.0f * widthViewport / 2.0f - widthViewport) / widthViewport;
float y1 = (heightViewport- 2.0f *heightViewport / 2.0f) /heightViewport;
float x2 = (2.0f * (x + (-lastMousePosX + widthViewport / 2.0f)) - widthViewport) / widthViewport;
float y2 = (heightViewport- 2.0f * (y + (-lastMousePosY +heightViewport / 2.0f))) /heightViewport;
currentTrackball.ComputeQuaternion(x1, y1, x2, y2);
//fetch rotation
newQuat = currentTrackball.GetQuaternion();
Vec3 pivot;
switch (p_pivot.getValue())
{
case CAMERA_LOOKAT_PIVOT:
pivot = getLookAt();
break;
case CAMERA_POSITION_PIVOT:
pivot = getPosition();
break;
case WORLD_CENTER_PIVOT:
pivot = Vec3(0.0, 0.0, 0.0);
break;
case SCENE_CENTER_PIVOT:
default:
pivot = sceneCenter;
break;
}
rotateWorldAroundPoint(newQuat, pivot, this->getOrientation());
}
else if (currentMode == ZOOM_MODE)
{
double zoomStep = p_zoomSpeed.getValue() *( 0.01*sceneRadius )/heightViewport;
double zoomDistance = zoomStep * -(y - lastMousePosY);
Vec3 trans(0.0, 0.0, zoomDistance);
trans = cameraToWorldTransform(trans);
translate(trans);
Vec3 newLookAt = cameraToWorldCoordinates(Vec3(0,0,-zoomStep));
if (dot(getLookAt() - getPosition(), newLookAt - getPosition()) < 0
&& !p_fixedLookAtPoint.getValue() )
{
translateLookAt(newLookAt - getLookAt());
}
getDistance(); // update distance between camera position and lookat
}
else if (currentMode == PAN_MODE)
{
Vec3 trans(lastMousePosX - x, y-lastMousePosY, 0.0);
trans = cameraToWorldTransform(trans)*p_panSpeed.getValue()*( 0.01*sceneRadius ) ;
translate(trans);
if ( !p_fixedLookAtPoint.getValue() )
{
translateLookAt(trans);
}
}
//must call update afterwards
lastMousePosX = x;
lastMousePosY = y;
}
else if (currentMode == WHEEL_ZOOM_MODE)
{
double zoomStep = p_zoomSpeed.getValue() *( 0.01*sceneRadius )/heightViewport;
double zoomDistance = zoomStep * -(y*0.5);
Vec3 trans(0.0, 0.0, zoomDistance);
trans = cameraToWorldTransform(trans);
translate(trans);
Vec3 newLookAt = cameraToWorldCoordinates(Vec3(0,0,-zoomStep));
if (dot(getLookAt() - getPosition(), newLookAt - getPosition()) < 0
&& !p_fixedLookAtPoint.getValue() )
{
translateLookAt(newLookAt - getLookAt());
}
getDistance(); // update distance between camera position and lookat
currentMode = NONE_MODE;
}
computeZ();
}
void InteractiveCamera::manageEvent(core::objectmodel::Event* e)
{
if(p_activated.getValue())
{
//Dispatch event
if (sofa::core::objectmodel::MouseEvent::checkEventType(e))
{
sofa::core::objectmodel::MouseEvent* me = static_cast<sofa::core::objectmodel::MouseEvent*>(e);
processMouseEvent(me);
}
else if (sofa::core::objectmodel::KeypressedEvent::checkEventType(e))
{
sofa::core::objectmodel::KeypressedEvent* kpe = static_cast<sofa::core::objectmodel::KeypressedEvent*>(e);
processKeyPressedEvent(kpe);
}
else if (sofa::core::objectmodel::KeyreleasedEvent::checkEventType(e))
{
sofa::core::objectmodel::KeyreleasedEvent* kre = static_cast<core::objectmodel::KeyreleasedEvent* > (e);
processKeyReleasedEvent(kre);
}
internalUpdate();
}
else
{
isMoving = false;
currentMode = NONE_MODE;
}
}
void InteractiveCamera::processMouseEvent(core::objectmodel::MouseEvent* me)
{
int posX = me->getPosX();
int posY = me->getPosY();
int wheelDelta = me->getWheelDelta();
//Mouse Press
if(me->getState() == core::objectmodel::MouseEvent::LeftPressed)
{
isMoving = true;
currentMode = TRACKBALL_MODE;
lastMousePosX = posX;
lastMousePosY = posY;
}
else if(me->getState() == core::objectmodel::MouseEvent::RightPressed)
{
isMoving = true;
currentMode = PAN_MODE;
lastMousePosX = posX;
lastMousePosY = posY;
}
else if(me->getState() == core::objectmodel::MouseEvent::MiddlePressed)
{
isMoving = true;
currentMode = ZOOM_MODE;
lastMousePosX = posX;
lastMousePosY = posY;
}
else
//Mouse Move
if(me->getState() == core::objectmodel::MouseEvent::Move)
{
//isMoving = true;
}
else
//Mouse Release
if(me->getState() == core::objectmodel::MouseEvent::LeftReleased)
{
isMoving = false;
currentMode = NONE_MODE;
}
else if(me->getState() == core::objectmodel::MouseEvent::RightReleased)
{
isMoving = false;
currentMode = NONE_MODE;
}
else if(me->getState() == core::objectmodel::MouseEvent::MiddleReleased)
{
isMoving = false;
currentMode = NONE_MODE;
}
//Mouse Wheel
if(me->getState() == core::objectmodel::MouseEvent::Wheel)
{
isMoving = false;
currentMode = WHEEL_ZOOM_MODE;
posX = 0;
posY = wheelDelta;
}
moveCamera(posX, posY);
p_position.endEdit();
}
void InteractiveCamera::processKeyPressedEvent(core::objectmodel::KeypressedEvent* kpe)
{
char keyPressed = kpe->getKey();
switch(keyPressed)
{
case 'a':
case 'A':
{
//glPushMatrix();
//glLoadIdentity();
//helper::gl::Axis(p_position.getValue(), p_orientation.getValue(), 10.0);
//glPopMatrix();
break;
}
default:
{
break;
}
}
}
void InteractiveCamera::processKeyReleasedEvent(core::objectmodel::KeyreleasedEvent* /* kre */)
{
}
} // namespace visualmodel
} // namespace component
} // namespace sofa