bool ClusterCullingCallback::cull(osg::NodeVisitor* nv, osg::Drawable* , osg::State*) const
{
CullSettings* cs = dynamic_cast<CullSettings*>(nv);
if (cs && !(cs->getCullingMode() & CullSettings::CLUSTER_CULLING))
{
// cluster culling switched off cull settings.
return false;
}
if (_deviation<=-1.0f)
{
// cluster culling switch off by deviation.
return false;
}
osg::Vec3 eye_cp = nv->getViewPoint() - _controlPoint;
float radius = eye_cp.length();
if (radius<_radius)
{
return false;
}
float deviation = (eye_cp * _normal)/radius;
// OSG_NOTICE<<"ClusterCullingCallback::cull() _normal="<<_normal<<" _controlPointtest="<<_controlPoint<<" eye_cp="<<eye_cp<<std::endl;
// OSG_NOTICE<<" deviation="<<deviation<<" _deviation="<<_deviation<<" test="<<(deviation < _deviation)<<std::endl;
return deviation < _deviation;
}
//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
TEST(CullSettingsTest, DefaultValues)
{
CullSettings s;
EXPECT_TRUE(s.isViewFrustumCullingEnabled());
EXPECT_FALSE(s.isPixelSizeCullingEnabled());
EXPECT_DOUBLE_EQ(80, s.pixelSizeCullingAreaThreshold());
}
//--------------------------------------------------------------------------------------------------
/// Compute and append the visible parts in this node and all child nodes (recursive)
//--------------------------------------------------------------------------------------------------
void ModelBasicTreeNode::findVisibleParts(PartRenderHintCollection* visibleParts, const Camera& camera, const CullSettings& cullSettings, uint enableMask)
{
if (!m_boundingBox.isValid())
{
return;
}
const size_t numChildren = m_children.size();
const size_t numParts = m_partList.notNull() ? m_partList->partCount() : 0;
if (numChildren > 0 || numParts > 1)
{
// View Frustum culling
if (cullSettings.isViewFrustumCullingEnabled())
{
if (camera.frustum().isOutside(m_boundingBox))
{
// No parts on this level (or below) are visible. So just return
return;
}
}
// Pixel size culling
if (cullSettings.isPixelSizeCullingEnabled())
{
double area = camera.computeProjectedBoundingSpherePixelArea(m_boundingBox.center(), m_boundingBox.radius());
if (area < cullSettings.pixelSizeCullingAreaThreshold())
{
return;
}
}
}
size_t i;
for (i = 0; i < numChildren; i++)
{
ModelBasicTreeNode* c = m_children[i];
CVF_ASSERT(c);
c->findVisibleParts(visibleParts, camera, cullSettings, enableMask);
}
if (m_partList.notNull())
{
m_partList->findVisibleParts(visibleParts, camera, cullSettings, enableMask);
}
}
//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
TEST(CullSettingsTest, GettersAndSetters)
{
CullSettings s;
s.enableViewFrustumCulling(false);
s.enablePixelSizeCulling(true);
s.setPixelSizeCullingAreaThreshold(5);
EXPECT_FALSE(s.isViewFrustumCullingEnabled());
EXPECT_TRUE(s.isPixelSizeCullingEnabled());
EXPECT_DOUBLE_EQ(5, s.pixelSizeCullingAreaThreshold());
}
