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Render the water plane with GL_DEPTH_CLAMP if supported (Fixes #996)

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This commit is contained in:
scrawl 2015-11-02 00:29:09 +01:00
parent 802620a86b
commit 4690ec12cc
1 changed files with 20 additions and 0 deletions
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20
apps/openmw/mwrender/water.cpp
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@ -13,6 +13,7 @@
#include <osg/MatrixTransform>
#include <osg/FrontFace>
#include <osg/Shader>
#include <osg/GLExtensions>
#include <osgDB/ReadFile>
@ -389,6 +390,24 @@ private:
osg::ref_ptr<osg::Node> mScene;
};
/// DepthClampCallback enables GL_DEPTH_CLAMP for the current draw, if supported.
class DepthClampCallback : public osg::Drawable::DrawCallback
{
public:
virtual void drawImplementation(osg::RenderInfo& renderInfo,const osg::Drawable* drawable) const
{
if (!osg::isGLExtensionOrVersionSupported(renderInfo.getState()->getContextID(), "GL_ARB_depth_clamp", 3.3))
drawable->drawImplementation(renderInfo);
glEnable(GL_DEPTH_CLAMP);
drawable->drawImplementation(renderInfo);
// restore default
glDisable(GL_DEPTH_CLAMP);
}
};
Water::Water(osg::Group *parent, osg::Group* sceneRoot, Resource::ResourceSystem *resourceSystem, osgUtil::IncrementalCompileOperation *ico,
const MWWorld::Fallback* fallback, const std::string& resourcePath)
: mParent(parent)
@ -402,6 +421,7 @@ Water::Water(osg::Group *parent, osg::Group* sceneRoot, Resource::ResourceSystem
mSimulation.reset(new RippleSimulation(parent, resourceSystem, fallback));
osg::ref_ptr<osg::Geometry> waterGeom = createWaterGeometry(CELL_SIZE*150, 40, 900);
waterGeom->setDrawCallback(new DepthClampCallback);
mWaterGeode = new osg::Geode;
mWaterGeode->addDrawable(waterGeom);