Ogre::AxisAlignedBox EditSphere::aab(double scale) const
{
Ogre::Sphere sp = scaleSphere(m_sp, scale);
Ogre::AxisAlignedBox aabb(sp.getCenter().x-((int)sp.getRadius()+1), sp.getCenter().y-((int)sp.getRadius()+1), sp.getCenter().z-((int)sp.getRadius()+1),
sp.getCenter().x+((int)sp.getRadius()+1), sp.getCenter().y+((int)sp.getRadius()+1), sp.getCenter().z+((int)sp.getRadius()+1));
return aabb;
}
Ogre::Sphere EditSphere::scaleSphere(const Ogre::Sphere _sp, const double scale)
{
Ogre::Sphere sp = _sp;
sp.setCenter(sp.getCenter()/scale);
sp.setRadius(sp.getRadius()/scale);
return sp;
}
//-----------------------------------------------------------------------
bool Light::isInLightRange(const Ogre::Sphere& container) const
{
bool isIntersect = true;
//directional light always intersects (check only spotlight and point)
if (mLightType != LT_DIRECTIONAL)
{
//Check that the sphere is within the sphere of the light
isIntersect = container.intersects(Sphere(mDerivedPosition, mRange));
//If this is a spotlight, check that the sphere is within the cone of the spot light
if ((isIntersect) && (mLightType == LT_SPOTLIGHT))
{
//check first check of the sphere surrounds the position of the light
//(this covers the case where the center of the sphere is behind the position of the light
// something which is not covered in the next test).
isIntersect = container.intersects(mDerivedPosition);
//if not test cones
if (!isIntersect)
{
//Calculate the cone that exists between the sphere and the center position of the light
Ogre::Vector3 lightSphereConeDirection = container.getCenter() - mDerivedPosition;
Ogre::Radian halfLightSphereConeAngle = Math::ASin(container.getRadius() / lightSphereConeDirection.length());
//Check that the light cone and the light-position-to-sphere cone intersect)
Radian angleBetweenConeDirections = lightSphereConeDirection.angleBetween(mDerivedDirection);
isIntersect = angleBetweenConeDirections <= halfLightSphereConeAngle + mSpotOuter * 0.5;
}
}
}
return isIntersect;
}
void OrbitCamera( ::Ogre::Camera* a_pCam, const::Ogre::Sphere& a_subjSphr,
const Ogre::Vector2& a_curTouch, const Ogre::Vector2& a_oldTouch )
{
const ::Ogre::Vector3& center = a_subjSphr.getCenter() ;
const ::Ogre::Vector3& camPos = a_pCam->getPosition() ;
// gets the current looked-at point.
const ::Ogre::Vector3 camDir = a_pCam->getDirection().normalisedCopy() ;
const ::Ogre::Vector3 lookAt = camDir.dotProduct(center - camPos) * camDir + camPos ;
// makes the ray from the subjet's center to the camera.
const ::Ogre::Ray rayToCam( center, (camPos - center).normalisedCopy() ) ;
// makes the tangent plane to the sphere whose normal is toward the camera.
::Ogre::Real fDist = center.distance( camPos ) ;
if( a_subjSphr.getRadius() < fDist )
fDist = a_subjSphr.getRadius() ;
const ::Ogre::Plane touchPlane( rayToCam.getDirection(), fDist ) ;
// gets the touch points on the plane.
::Ogre::Ray ray ;
a_pCam->getCameraToViewportRay( a_curTouch.x, a_curTouch.y, &ray ) ;
const ::Ogre::Vector3 curPoint = ray.getPoint( ray.intersects( touchPlane ).second ) ;
a_pCam->getCameraToViewportRay( a_oldTouch.x, a_oldTouch.y, &ray ) ;
const ::Ogre::Vector3 oldPoint = ray.getPoint( ray.intersects( touchPlane ).second ) ;
// gets the quaternion.
const ::Ogre::Quaternion qtnn = (curPoint - center).getRotationTo( oldPoint - center ) ;
// gets the new camera position.
::Ogre::Vector3 newCamPos = camPos - center ;
newCamPos = qtnn * newCamPos ;
newCamPos += center ;
// gest the new look-at.
::Ogre::Vector3 newLookAt = lookAt - center ;
newLookAt = qtnn * newLookAt ;
newLookAt += center ;
// sets the camera to the new properties.
a_pCam->setPosition( newCamPos ) ;
a_pCam->lookAt( newLookAt ) ;
}
double EditSphere::calcVoxel(const Ogre::Vector3& pos, const double &scale)
{
Ogre::Sphere sp = scaleSphere(m_sp, scale);
double dist = sp.getRadius() - sp.getCenter().distance(pos);
return dist;
}
