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Scale the sun flash texture depending on occlusion query

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This commit is contained in:
scrawl 2015-09-21 16:34:30 +02:00
parent a2a4532e71
commit 96b31d3bba
1 changed files with 45 additions and 28 deletions
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73
apps/openmw/mwrender/sky.cpp
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@ -387,11 +387,7 @@ public:
mOcclusionQueryVisiblePixels = createOcclusionQueryNode(queryTransform, true);
mOcclusionQueryTotalPixels = createOcclusionQueryNode(queryTransform, false);
osg::PositionAttitudeTransform* sunFlashNode = createSunFlash(textureManager);
mSunFlashCallback = new SunFlashCallback(mOcclusionQueryVisiblePixels, mOcclusionQueryTotalPixels, sunFlashNode, mTransform);
mTransform->addCullCallback(mSunFlashCallback);
createSunFlash(textureManager);
createSunGlare();
}
@ -466,7 +462,7 @@ private:
return oqn;
}
osg::PositionAttitudeTransform* createSunFlash(Resource::TextureManager& textureManager)
void createSunFlash(Resource::TextureManager& textureManager)
{
osg::ref_ptr<osg::Texture2D> tex = textureManager.getTexture2D("textures/tx_sun_flash_grey_05.dds",
osg::Texture::CLAMP,
@ -490,12 +486,19 @@ private:
stateset->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
stateset->setRenderBinDetails(RenderBin_SunGlare, "RenderBin");
stateset->setNestRenderBins(false);
return transform;
mSunFlashNode = transform;
mSunFlashCallback = new SunFlashCallback(mOcclusionQueryVisiblePixels, mOcclusionQueryTotalPixels);
mSunFlashNode->addCullCallback(mSunFlashCallback);
}
void destroySunFlash()
{
mTransform->removeCullCallback(mSunFlashCallback);
mSunFlashCallback = NULL;
if (mSunFlashNode)
{
mSunFlashNode->removeCullCallback(mSunFlashCallback);
mSunFlashCallback = NULL;
}
}
void createSunGlare()
@ -535,8 +538,11 @@ private:
}
void destroySunGlare()
{
mSunGlareNode->removeCullCallback(mSunGlareCallback);
mSunGlareCallback = NULL;
if (mSunGlareNode)
{
mSunGlareNode->removeCullCallback(mSunGlareCallback);
mSunGlareCallback = NULL;
}
}
class Updater : public SceneUtil::StateSetUpdater
@ -603,17 +609,13 @@ private:
std::map<osg::observer_ptr<osg::Camera>, float> mLastRatio;
};
/// SunFlashCallback handles fading/scaling of the sun flash depending on occlusion query result. Must be attached as a cull callback.
/// SunFlashCallback handles fading/scaling of a node depending on occlusion query result. Must be attached as a cull callback.
class SunFlashCallback : public OcclusionCallback
{
public:
SunFlashCallback(osg::ref_ptr<osg::OcclusionQueryNode> oqnVisible, osg::ref_ptr<osg::OcclusionQueryNode> oqnTotal,
osg::ref_ptr<osg::PositionAttitudeTransform> flashNode,
osg::ref_ptr<osg::PositionAttitudeTransform> sunTransform)
SunFlashCallback(osg::ref_ptr<osg::OcclusionQueryNode> oqnVisible, osg::ref_ptr<osg::OcclusionQueryNode> oqnTotal)
: OcclusionCallback(oqnVisible, oqnTotal)
, mFlashNode(flashNode)
{
mInitialScale = mFlashNode->getScale().x();
}
virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
@ -622,19 +624,33 @@ private:
float visibleRatio = getVisibleRatio(cv->getCurrentCamera());
handleOcclusionResult (visibleRatio, cv);
if (visibleRatio > 0.f)
{
// rescale into [0.35, 1.0] range
const float threshold = 0.35;
visibleRatio = visibleRatio * (1.f - threshold) + threshold;
}
traverse(node, nv);
float scale = visibleRatio;
if (scale == 0.f)
{
// no traverse
return;
}
else
{
osg::Matrix modelView = *cv->getModelViewMatrix();
modelView.preMultScale(osg::Vec3f(visibleRatio, visibleRatio, visibleRatio));
cv->pushModelViewMatrix(new osg::RefMatrix(modelView), osg::Transform::RELATIVE_RF);
traverse(node, nv);
cv->popModelViewMatrix();
}
}
void handleOcclusionResult(float visibleRatio, osgUtil::CullVisitor* cv)
{
// TODO
}
private:
float mInitialScale;
osg::ref_ptr<osg::PositionAttitudeTransform> mFlashNode;
};
@ -734,6 +750,7 @@ private:
osg::ref_ptr<Updater> mUpdater;
osg::ref_ptr<SunFlashCallback> mSunFlashCallback;
osg::ref_ptr<osg::Node> mSunFlashNode;
osg::ref_ptr<SunGlareCallback> mSunGlareCallback;
osg::ref_ptr<osg::Node> mSunGlareNode;
osg::ref_ptr<osg::OcclusionQueryNode> mOcclusionQueryVisiblePixels;