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Double buffer debug HUD frustum geometries to prevent race conditions.

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This commit is contained in:
AnyOldName3 2019-02-19 18:13:03 +00:00
parent f3fc888ab9
commit 0c8ad0a3bb
2 changed files with 39 additions and 14 deletions
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49
components/sceneutil/mwshadowtechnique.cpp
View File

@ -978,7 +978,7 @@ void MWShadowTechnique::cull(osgUtil::CullVisitor& cv)
osg::ref_ptr<osg::Vec3Array> vertexArray = new osg::Vec3Array();
for (osg::Vec3d &vertex : frustum.corners)
vertexArray->push_back((osg::Vec3)vertex);
_debugHud->setFrustumVertices(vertexArray);
_debugHud->setFrustumVertices(vertexArray, cv.getTraversalNumber());
}
double reducedNear, reducedFar;
@ -3042,6 +3042,25 @@ void MWShadowTechnique::releaseGLObjects(osg::State* state) const
_debugHud->releaseGLObjects(state);
}
class DoubleBufferCallback : public osg::Callback
{
public:
DoubleBufferCallback(osg::NodeList &children) : mChildren(children) {}
virtual bool run(osg::Object* node, osg::Object* visitor) override
{
// We can't use a static cast as NodeVisitor virtually inherits from Object
osg::ref_ptr<osg::NodeVisitor> nodeVisitor = visitor->asNodeVisitor();
unsigned int traversalNumber = nodeVisitor->getTraversalNumber();
mChildren[traversalNumber % 2]->accept(*nodeVisitor);
return true;
}
protected:
osg::NodeList mChildren;
};
SceneUtil::MWShadowTechnique::DebugHUD::DebugHUD(int numberOfShadowMapsPerLight) : mDebugProgram(new osg::Program)
{
osg::ref_ptr<osg::Shader> vertexShader = new osg::Shader(osg::Shader::VERTEX, debugVertexShaderSource);
@ -3049,20 +3068,23 @@ SceneUtil::MWShadowTechnique::DebugHUD::DebugHUD(int numberOfShadowMapsPerLight)
osg::ref_ptr<osg::Shader> fragmentShader = new osg::Shader(osg::Shader::FRAGMENT, debugFragmentShaderSource);
mDebugProgram->addShader(fragmentShader);
mFrustumGeometry = new osg::Geometry();
mFrustumGeometry->setCullingActive(false);
osg::ref_ptr<osg::Program> frustumProgram = new osg::Program;
vertexShader = new osg::Shader(osg::Shader::VERTEX, debugFrustumVertexShaderSource);
frustumProgram->addShader(vertexShader);
fragmentShader = new osg::Shader(osg::Shader::FRAGMENT, debugFrustumFragmentShaderSource);
frustumProgram->addShader(fragmentShader);
mFrustumGeometry->getOrCreateStateSet()->setAttributeAndModes(frustumProgram, osg::StateAttribute::ON);
//mFrustumGeometry->getOrCreateStateSet()->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
for (int i = 0; i < 2; ++i)
{
mFrustumGeometries.emplace_back(new osg::Geometry());
mFrustumGeometries[i]->setCullingActive(false);
mFrustumGeometries[i]->getOrCreateStateSet()->setAttributeAndModes(frustumProgram, osg::StateAttribute::ON);
}
osg::ref_ptr<osg::DrawElementsUShort> frustumDrawElements = new osg::DrawElementsUShort(osg::PrimitiveSet::LINE_STRIP);
mFrustumGeometry->addPrimitiveSet(frustumDrawElements);
for (auto & geom : mFrustumGeometries)
geom->addPrimitiveSet(frustumDrawElements);
frustumDrawElements->push_back(0);
frustumDrawElements->push_back(1);
frustumDrawElements->push_back(2);
@ -3075,7 +3097,8 @@ SceneUtil::MWShadowTechnique::DebugHUD::DebugHUD(int numberOfShadowMapsPerLight)
frustumDrawElements->push_back(4);
frustumDrawElements = new osg::DrawElementsUShort(osg::PrimitiveSet::LINES);
mFrustumGeometry->addPrimitiveSet(frustumDrawElements);
for (auto & geom : mFrustumGeometries)
geom->addPrimitiveSet(frustumDrawElements);
frustumDrawElements->push_back(1);
frustumDrawElements->push_back(5);
frustumDrawElements->push_back(2);
@ -3118,12 +3141,13 @@ void SceneUtil::MWShadowTechnique::DebugHUD::releaseGLObjects(osg::State* state)
node->releaseGLObjects(state);
for (auto const& node : mFrustumTransforms)
node->releaseGLObjects(state);
mFrustumGeometry->releaseGLObjects(state);
for (auto const& node : mFrustumGeometries)
node->releaseGLObjects(state);
}
void SceneUtil::MWShadowTechnique::DebugHUD::setFrustumVertices(osg::ref_ptr<osg::Vec3Array> vertices)
void SceneUtil::MWShadowTechnique::DebugHUD::setFrustumVertices(osg::ref_ptr<osg::Vec3Array> vertices, unsigned int traversalNumber)
{
mFrustumGeometry->setVertexArray(vertices);
mFrustumGeometries[traversalNumber % 2]->setVertexArray(vertices);
}
void SceneUtil::MWShadowTechnique::DebugHUD::addAnotherShadowMap()
@ -3146,7 +3170,8 @@ void SceneUtil::MWShadowTechnique::DebugHUD::addAnotherShadowMap()
stateSet->addUniform(textureUniform.get());
mFrustumTransforms.push_back(new osg::Group);
mFrustumTransforms[shadowMapNumber]->addChild(mFrustumGeometry);
osg::NodeList frustumGeometryNodeList(mFrustumGeometries.cbegin(), mFrustumGeometries.cend());
mFrustumTransforms[shadowMapNumber]->setCullCallback(new DoubleBufferCallback(frustumGeometryNodeList));
mFrustumTransforms[shadowMapNumber]->setCullingActive(false);
mDebugCameras[shadowMapNumber]->addChild(mFrustumTransforms[shadowMapNumber]);

4
components/sceneutil/mwshadowtechnique.hpp
View File

@ -264,7 +264,7 @@ namespace SceneUtil {
virtual void releaseGLObjects(osg::State* state = 0) const;
virtual void setFrustumVertices(osg::ref_ptr<osg::Vec3Array> vertices);
virtual void setFrustumVertices(osg::ref_ptr<osg::Vec3Array> vertices, unsigned int traversalNumber);
protected:
virtual void addAnotherShadowMap();
@ -275,7 +275,7 @@ namespace SceneUtil {
std::vector<osg::ref_ptr<osg::Node>> mDebugGeometry;
std::vector<osg::ref_ptr<osg::Group>> mFrustumTransforms;
std::vector<osg::ref_ptr<osg::Uniform>> mFrustumUniforms;
osg::ref_ptr<osg::Geometry> mFrustumGeometry;
std::vector<osg::ref_ptr<osg::Geometry>> mFrustumGeometries;
};
osg::ref_ptr<DebugHUD> _debugHud;