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minor objectpaging.cpp scene graph optimisations (#3155)

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We now use PositionAttitudeTransform for unmerged nodes because I have been informed PositionAttitudeTransform's scene graph performance is measurably faster than MatrixTransform's. We still need to use MatrixTransform for merged nodes because the Optimizer has limited support for non-MatrixTransform nodes. These MatrixTransforms will be removed in the merging process anyway.
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Bo Svensson 2021-10-11 08:09:01 +00:00 committed by GitHub
parent c2d836c6c4
commit cbcdd705ee
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1 changed files with 25 additions and 7 deletions
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32
apps/openmw/mwrender/objectpaging.cpp
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@ -13,6 +13,7 @@
#include <components/misc/resourcehelpers.hpp>
#include <components/resource/scenemanager.hpp>
#include <components/sceneutil/optimizer.hpp>
#include <components/sceneutil/positionattitudetransform.hpp>
#include <components/sceneutil/clone.hpp>
#include <components/sceneutil/util.hpp>
#include <components/vfs/manager.hpp>
@ -590,14 +591,31 @@ namespace MWRender
if (!activeGrid && minSizeMerged != minSize && cnode->getBound().radius2() * cref->mScale*cref->mScale < (viewPoint-pos).length2()*minSizeMerged*minSizeMerged)
continue;
osg::Matrixf matrix;
matrix.preMultTranslate(pos - worldCenter);
matrix.preMultRotate( osg::Quat(ref.mPos.rot[2], osg::Vec3f(0,0,-1)) *
osg::Vec3f nodePos = pos - worldCenter;
osg::Quat nodeAttitude = osg::Quat(ref.mPos.rot[2], osg::Vec3f(0,0,-1)) *
osg::Quat(ref.mPos.rot[1], osg::Vec3f(0,-1,0)) *
osg::Quat(ref.mPos.rot[0], osg::Vec3f(-1,0,0)) );
matrix.preMultScale(osg::Vec3f(ref.mScale, ref.mScale, ref.mScale));
osg::ref_ptr<osg::MatrixTransform> trans = new osg::MatrixTransform(matrix);
trans->setDataVariance(osg::Object::STATIC);
osg::Quat(ref.mPos.rot[0], osg::Vec3f(-1,0,0));
osg::Vec3f nodeScale = osg::Vec3f(ref.mScale, ref.mScale, ref.mScale);
osg::ref_ptr<osg::Group> trans;
if (merge)
{
// Optimizer currently supports only MatrixTransforms.
osg::Matrixf matrix;
matrix.preMultTranslate(nodePos);
matrix.preMultRotate(nodeAttitude);
matrix.preMultScale(nodeScale);
trans = new osg::MatrixTransform(matrix);
trans->setDataVariance(osg::Object::STATIC);
}
else
{
trans = new SceneUtil::PositionAttitudeTransform;
SceneUtil::PositionAttitudeTransform* pat = static_cast<SceneUtil::PositionAttitudeTransform*>(trans.get());
pat->setPosition(nodePos);
pat->setScale(nodeScale);
pat->setAttitude(nodeAttitude);
}
copyop.setCopyFlags(merge ? osg::CopyOp::DEEP_COPY_NODES|osg::CopyOp::DEEP_COPY_DRAWABLES : osg::CopyOp::DEEP_COPY_NODES);
copyop.mOptimizeBillboards = (size > 1/4.f);