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Change assosiative order of stereo-related matrix multiplications to reduce FP errors.

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This commit is contained in:
Mads Buvik Sandvei 2023-03-11 14:00:39 +01:00
parent 93a72a6368
commit 00e02bb326
4 changed files with 13 additions and 21 deletions
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2
apps/openmw/mwrender/pingpongcull.cpp
View file

@ -47,7 +47,7 @@ namespace MWRender
auto& sm = Stereo::Manager::instance();
auto view = sm.getEye(cv);
int index = view == Stereo::Eye::Right ? 1 : 0;
auto projectionMatrix = sm.computeEyeViewOffset(index) * sm.computeEyeProjection(index, true);
auto projectionMatrix = sm.computeEyeProjection(index, true);
postProcessor->getStateUpdater()->setProjectionMatrix(projectionMatrix);
}

4
apps/openmw/mwrender/renderingmanager.cpp
View file

@ -118,14 +118,14 @@ namespace MWRender
{
auto* uProjectionMatrix = stateset->getUniform("projectionMatrix");
if (uProjectionMatrix)
uProjectionMatrix->set(Stereo::Manager::instance().computeEyeViewOffset(0) * Stereo::Manager::instance().computeEyeProjection(0, SceneUtil::AutoDepth::isReversed()));
uProjectionMatrix->set(Stereo::Manager::instance().computeEyeProjection(0, SceneUtil::AutoDepth::isReversed()));
}
void applyRight(osg::StateSet* stateset, osgUtil::CullVisitor* nv) override
{
auto* uProjectionMatrix = stateset->getUniform("projectionMatrix");
if (uProjectionMatrix)
uProjectionMatrix->set(Stereo::Manager::instance().computeEyeViewOffset(1) * Stereo::Manager::instance().computeEyeProjection(1, SceneUtil::AutoDepth::isReversed()));
uProjectionMatrix->set(Stereo::Manager::instance().computeEyeProjection(1, SceneUtil::AutoDepth::isReversed()));
}
void setProjectionMatrix(const osg::Matrixf& projectionMatrix)

12
apps/openmw/mwrender/skyutil.cpp
View file

@ -645,22 +645,14 @@ namespace MWRender
auto& sm = Stereo::Manager::instance();
auto* projectionMatrixUniform = stateset->getUniform("projectionMatrix");
auto projectionMatrix = sm.computeEyeProjection(0, true);
auto viewOffsetMatrix = sm.computeEyeViewOffset(0);
for (int col : {0, 1, 2})
viewOffsetMatrix(3, col) = 0;
projectionMatrixUniform->set(viewOffsetMatrix * projectionMatrix);
projectionMatrixUniform->set(projectionMatrix);
}
void applyRight(osg::StateSet* stateset, osgUtil::CullVisitor* /*cv*/) override
{
auto& sm = Stereo::Manager::instance();
auto* projectionMatrixUniform = stateset->getUniform("projectionMatrix");
auto projectionMatrix = sm.computeEyeProjection(1, true);
auto viewOffsetMatrix = sm.computeEyeViewOffset(1);
for (int col : {0, 1, 2})
viewOffsetMatrix(3, col) = 0;
projectionMatrixUniform->set(viewOffsetMatrix * projectionMatrix);
projectionMatrixUniform->set(projectionMatrix);
}
private:

16
components/stereo/stereomanager.cpp
View file

@ -71,14 +71,14 @@ namespace Stereo
{
auto* uProjectionMatrix = stateset->getUniform("projectionMatrix");
if (uProjectionMatrix)
uProjectionMatrix->set(mManager->computeEyeViewOffset(0) * mManager->computeEyeProjection(0, SceneUtil::AutoDepth::isReversed()));
uProjectionMatrix->set(mManager->computeEyeProjection(0, SceneUtil::AutoDepth::isReversed()));
}
void applyRight(osg::StateSet* stateset, osgUtil::CullVisitor* nv) override
{
auto* uProjectionMatrix = stateset->getUniform("projectionMatrix");
if (uProjectionMatrix)
uProjectionMatrix->set(mManager->computeEyeViewOffset(1) * mManager->computeEyeProjection(1, SceneUtil::AutoDepth::isReversed()));
uProjectionMatrix->set(mManager->computeEyeProjection(1, SceneUtil::AutoDepth::isReversed()));
}
private:
@ -245,23 +245,23 @@ namespace Stereo
osg::Matrixd computeLeftEyeProjection(const osg::Matrixd& projection) const override
{
(void)projection;
return mManager->computeEyeViewOffset(0) * mManager->computeEyeProjection(0, false);
return mManager->computeEyeProjection(0, false);
}
osg::Matrixd computeLeftEyeView(const osg::Matrixd& view) const override
{
return view;
return view * mManager->computeEyeViewOffset(0);
}
osg::Matrixd computeRightEyeProjection(const osg::Matrixd& projection) const override
{
(void)projection;
return mManager->computeEyeViewOffset(1) * mManager->computeEyeProjection(1, false);
return mManager->computeEyeProjection(1, false);
}
osg::Matrixd computeRightEyeView(const osg::Matrixd& view) const override
{
return view;
return view * mManager->computeEyeViewOffset(1);
}
Manager* mManager;
@ -368,8 +368,8 @@ namespace Stereo
mFrustumManager->update(
{
mViewOffsetMatrix[0] * mProjectionMatrix[0],
mViewOffsetMatrix[1] * mProjectionMatrix[1]
mProjectionMatrix[0],
mProjectionMatrix[1]
});
}