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Code Issues Releases Wiki Activity

Better center picking for the Orbit Camera.

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This commit is contained in:
Aesylwinn 2016-03-26 00:51:19 -04:00
parent a0fb242bf8
commit fbe9177f5d
1 changed files with 27 additions and 3 deletions
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30
apps/opencs/view/render/cameracontroller.cpp
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@ -7,6 +7,10 @@
#include <osg/Matrixd> #include <osg/Matrixd>
#include <osg/Quat> #include <osg/Quat>
#include <osgUtil/LineSegmentIntersector>
#include "mask.hpp"
namespace CSVRender namespace CSVRender
{ {
@ -481,10 +485,30 @@ namespace CSVRender
{ {
static const int DefaultStartDistance = 10000.f; static const int DefaultStartDistance = 10000.f;
osg::Vec3d eye, up; // Try to intelligently pick focus object
getCamera()->getViewMatrixAsLookAt(eye, mCenter, up, DefaultStartDistance); osg::ref_ptr<osgUtil::LineSegmentIntersector> intersector (new osgUtil::LineSegmentIntersector(
osgUtil::Intersector::PROJECTION, osg::Vec3d(0, 0, 0), LocalForward));
mDistance = DefaultStartDistance; intersector->setIntersectionLimit(osgUtil::LineSegmentIntersector::LIMIT_NEAREST);
osgUtil::IntersectionVisitor visitor(intersector);
visitor.setTraversalMask(Mask_Reference | Mask_Terrain);
getCamera()->accept(visitor);
osg::Vec3d eye, center, up;
getCamera()->getViewMatrixAsLookAt(eye, center, up, DefaultStartDistance);
if (intersector->getIntersections().begin() != intersector->getIntersections().end())
{
mCenter = intersector->getIntersections().begin()->getWorldIntersectPoint();
mDistance = (eye - center).length();
}
else
{
mCenter = center;
mDistance = DefaultStartDistance;
}
mInitialized = true; mInitialized = true;
} }