intermin check-in of work on new LispSM implementation
This commit is contained in:
Robert Osfield
parent
04ffdf1801
commit
1d54065646
@ -64,6 +64,7 @@ class OSGSHADOW_EXPORT ViewDependentShadowMap : public ShadowTechnique
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typedef std::vector<Indices> Edges;
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Edges edges;
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osg::Vec3d eye;
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osg::Vec3d centerNearPlane;
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osg::Vec3d centerFarPlane;
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osg::Vec3d center;
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@ -161,6 +162,9 @@ class OSGSHADOW_EXPORT ViewDependentShadowMap : public ShadowTechnique
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virtual bool perspectiveShadowMapCameraSettings(Frustum& frustum, LightData& positionedLight, osg::Camera* camera);
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virtual bool lightSpacePerspectiveShadowMapCameraSettings(Frustum& frustum, LightData& positionedLight, osg::Camera* camera);
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virtual bool adjustPerspectiveShadowMapCameraSettings(Frustum& frustum, LightData& positionedLight, osg::Camera* camera);
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virtual bool assignTexGenSettings(osgUtil::CullVisitor* cv, osg::Camera* camera, unsigned int textureUnit, osg::TexGen* texgen);
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virtual void cullShadowReceivingScene(osgUtil::CullVisitor* cv) const;
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@ -46,8 +46,11 @@ class VDSMCameraCullCallback : public osg::NodeCallback
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virtual void operator()(osg::Node*, osg::NodeVisitor* nv);
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osg::RefMatrix* getProjectionMatrix() { return _projectionMatrix.get(); }
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protected:
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osg::ref_ptr<osg::RefMatrix> _projectionMatrix;
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ViewDependentShadowMap* _vdsm;
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osg::Polytope _polytope;
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};
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@ -88,6 +91,9 @@ void VDSMCameraCullCallback::operator()(osg::Node* node, osg::NodeVisitor* nv)
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if (cv->getComputeNearFarMode() != osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR)
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{
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// make sure that the near plane is computed correctly.
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cv->computeNearPlane();
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osg::Matrixd projection = *(cv->getProjectionMatrix());
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OSG_INFO<<"RTT Projection matrix "<<projection<<std::endl;
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@ -125,8 +131,9 @@ void VDSMCameraCullCallback::operator()(osg::Node* node, osg::NodeVisitor* nv)
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OSG_INFO<<"RTT Projection matrix after clamping "<<projection<<std::endl;
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camera->setProjectionMatrix(projection);
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}
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_projectionMatrix = cv->getProjectionMatrix();
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}
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}
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///////////////////////////////////////////////////////////////////////////////////////////////
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@ -168,7 +175,7 @@ void ViewDependentShadowMap::LightData::setLightData(osg::RefMatrix* lm, const o
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lightDir.normalize();
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if (lightMatrix.valid())
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{
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OSG_NOTICE<<" Light matrix "<<*lightMatrix<<std::endl;
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OSG_INFO<<" Light matrix "<<*lightMatrix<<std::endl;
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osg::Matrix lightToLocalMatrix(*lightMatrix * osg::Matrix::inverse(modelViewMatrix) );
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lightPos = lightPos * lightToLocalMatrix;
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lightDir = osg::Matrix::transform3x3( lightDir, lightToLocalMatrix );
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@ -227,7 +234,7 @@ ViewDependentShadowMap::ShadowData::ShadowData(ViewDependentShadowMap::ViewDepen
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//_camera->setClearColor(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
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_camera->setClearColor(osg::Vec4(0.0f,0.0f,0.0f,0.0f));
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//camera->setComputeNearFarMode(osg::Camera::DO_NOT_COMPUTE_NEAR_FAR);
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//_camera->setComputeNearFarMode(osg::Camera::DO_NOT_COMPUTE_NEAR_FAR);
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// set viewport
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_camera->setViewport(0,0,textureSize,textureSize);
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@ -306,10 +313,13 @@ ViewDependentShadowMap::Frustum::Frustum(osgUtil::CullVisitor* cv):
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OSG_INFO<<" corner "<<*itr<<std::endl;
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}
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// compute eye point
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eye = osg::Vec3d(0.0,0.0,0.0) * osg::Matrix::inverse(modelViewMatrix);
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// compute center and the frustumCenterLine
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centerNearPlane = (corners[0]+corners[1]+corners[5]+corners[4])*0.25;
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centerFarPlane = (corners[3]+corners[2]+corners[6]+corners[7])*0.25;
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center = (centerNearPlane+centerNearPlane)*0.5;
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center = (centerNearPlane+centerFarPlane)*0.5;
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frustumCenterLine = centerFarPlane-centerNearPlane;
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frustumCenterLine.normalize();
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@ -462,7 +472,7 @@ void ViewDependentShadowMap::update(osg::NodeVisitor& nv)
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void ViewDependentShadowMap::cull(osgUtil::CullVisitor& cv)
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{
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OSG_INFO<<std::endl<<std::endl<<"ViewDependentShadowMap::cull(osg::CullVisitor&"<<&cv<<")"<<std::endl;
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OSG_NOTICE<<std::endl<<std::endl<<"ViewDependentShadowMap::cull(osg::CullVisitor&"<<&cv<<")"<<std::endl;
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ViewDependentData* vdd = getViewDependentData(&cv);
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@ -473,6 +483,7 @@ void ViewDependentShadowMap::cull(osgUtil::CullVisitor& cv)
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return;
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}
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OSG_INFO<<"cv->getProjectionMatrix()="<<*cv.getProjectionMatrix()<<std::endl;
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// 1. Traverse main scene graph
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cv.pushStateSet( _shadowRecievingPlaceholderStateSet.get() );
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@ -483,6 +494,10 @@ void ViewDependentShadowMap::cull(osgUtil::CullVisitor& cv)
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cv.popStateSet();
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// make sure that the near plane is computed correctly so that any projection matrix computations
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// are all done correctly.
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cv.computeNearPlane();
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// 2. select active light sources
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// create a list of light sources + their matrices to place them
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@ -549,20 +564,29 @@ void ViewDependentShadowMap::cull(osgUtil::CullVisitor& cv)
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// 4.2 compute RTT camera view+projection matrix settings
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//
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#define NEW_ADJUST
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#ifdef NEW_ADJUST
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if (!standardShadowMapCameraSettings(frustum, pl, camera.get()))
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{
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OSG_NOTICE<<"No valid Camera settings, no shadow to render"<<std::endl;
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continue;
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}
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#else
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if (!computeShadowCameraSettings(frustum, pl, camera.get()))
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{
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OSG_NOTICE<<"No valid Camera settings, no shadow to render"<<std::endl;
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continue;
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}
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#endif
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// transform polytope in model coords into light spaces eye coords.
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osg::Matrixd invertModelView;
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invertModelView.invert(camera->getViewMatrix());
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polytope.transformProvidingInverse(invertModelView);
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camera->setCullCallback(new VDSMCameraCullCallback(this, polytope));
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osg::ref_ptr<VDSMCameraCullCallback> vdsmCallback = new VDSMCameraCullCallback(this, polytope);
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camera->setCullCallback(vdsmCallback.get());
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// 4.3 traverse RTT camera
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//
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@ -573,6 +597,24 @@ void ViewDependentShadowMap::cull(osgUtil::CullVisitor& cv)
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cv.popStateSet();
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#ifdef NEW_ADJUST
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switch(_shadowMapProjectionHint)
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{
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case(PERSPECTIVE_SHADOW_MAP):
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{
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OSG_NOTICE<<"******************New adjustment of shadow"<<std::endl;
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adjustPerspectiveShadowMapCameraSettings(frustum, pl, camera.get());
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if (vdsmCallback->getProjectionMatrix())
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{
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vdsmCallback->getProjectionMatrix()->set(camera->getProjectionMatrix());
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}
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break;
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}
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case(LIGHT_SPACE_PERSPECTIVE_SHADOW_MAP): break;
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default: break;
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}
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#endif
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// 4.4 compute main scene graph TexGen + uniform settings + setup state
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//
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@ -600,6 +642,7 @@ void ViewDependentShadowMap::cull(osgUtil::CullVisitor& cv)
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decoratorStateGraph->setStateSet(selectStateSetForRenderingShadow(*vdd));
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}
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OSG_NOTICE<<"End of shadow setup Projection matrix "<<*cv.getProjectionMatrix()<<std::endl;
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}
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bool ViewDependentShadowMap::selectActiveLights(osgUtil::CullVisitor* cv, ViewDependentData* vdd) const
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@ -658,21 +701,35 @@ void ViewDependentShadowMap::createShaders()
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_shadowCastingStateSet = new osg::StateSet;
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// cull front faces so that only backfaces contribute to depth map
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#if 0
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osg::ref_ptr<osg::CullFace> cull_face = new osg::CullFace;
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cull_face->setMode(osg::CullFace::FRONT);
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_shadowCastingStateSet->setAttribute(cull_face.get(), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
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_shadowCastingStateSet->setMode(GL_CULL_FACE, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
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// note soft (attribute only no mode override) setting. When this works ?
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// 1. for objects prepared for backface culling
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// because they usually also set CullFace and CullMode on in their state
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// For them we override CullFace but CullMode remains set by them
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// 2. For one faced, trees, and similar objects which cannot use
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// backface nor front face so they usually use CullMode off set here.
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// In this case we will draw them in their entirety.
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_shadowCastingStateSet->setAttribute( new osg::CullFace( osg::CullFace::FRONT ),
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osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
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// make sure GL_CULL_FACE is off by default
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// we assume that if object has cull face attribute set to back
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// it will also set cull face mode ON so no need for override
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_shadowCastingStateSet->setMode( GL_CULL_FACE, osg::StateAttribute::OFF );
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#endif
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#if 1
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float factor = 1.1;
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float units = 4.0;
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#else
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float factor = -1.1;
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float units = -4.0;
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#endif
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_polygonOffset = new osg::PolygonOffset(factor, units);
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_shadowCastingStateSet->setAttribute(_polygonOffset.get(), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
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_shadowCastingStateSet->setMode(GL_POLYGON_OFFSET_FILL, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
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#endif
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_uniforms.clear();
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osg::ref_ptr<osg::Uniform> baseTextureSampler = new osg::Uniform("baseTexture",(int)_baseTextureUnit);
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@ -824,15 +881,21 @@ bool ViewDependentShadowMap::standardShadowMapCameraSettings(Frustum& frustum, L
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{
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OSG_INFO<<"standardShadowMapCameraSettings()"<<std::endl;
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#if 0
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// compute the basis vectors for the light coordinate frame
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osg::Vec3d lightSide_y = positionedLight.lightDir ^ osg::Vec3d(0.0,1.0,0.0);
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osg::Vec3d lightSide_z = positionedLight.lightDir ^ osg::Vec3d(0.0,0.0,1.0);
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osg::Vec3d lightSide = (lightSide_y.length() > lightSide_z.length()) ? lightSide_y : lightSide_z;
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lightSide.normalize();
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//osg::Vec3d lightSide = positionedLight.lightDir ^ frustum.frustumCenterLine; lightSide.normalize();
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#else
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osg::Vec3d lightSide = positionedLight.lightDir ^ frustum.frustumCenterLine; lightSide.normalize();
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#endif
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osg::Vec3d lightUp = lightSide ^ positionedLight.lightDir;
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OSG_NOTICE<<"positionedLight.lightDir="<<positionedLight.lightDir<<std::endl;
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OSG_NOTICE<<"lightSide="<<lightSide<<std::endl;
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OSG_NOTICE<<"lightUp="<<lightUp<<std::endl;
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if (positionedLight.directionalLight)
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{
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double xMin=0.0, xMax=0.0;
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@ -848,6 +911,8 @@ bool ViewDependentShadowMap::standardShadowMapCameraSettings(Frustum& frustum, L
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cornerDelta*lightUp,
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cornerDelta*positionedLight.lightDir);
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OSG_INFO<<" corner ="<<*itr<<" in lightcoords "<<cornerInLightCoords<<std::endl;
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xMin = osg::minimum( xMin, cornerInLightCoords.x());
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xMax = osg::maximum( xMax, cornerInLightCoords.x());
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yMin = osg::minimum( yMin, cornerInLightCoords.y());
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@ -967,7 +1032,154 @@ bool ViewDependentShadowMap::standardShadowMapCameraSettings(Frustum& frustum, L
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bool ViewDependentShadowMap::perspectiveShadowMapCameraSettings(Frustum& frustum, LightData& positionedLight, osg::Camera* camera)
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{
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OSG_NOTICE<<"ViewDependentShadowMap::perspectiveShadowMapCameraSettings()"<<std::endl;
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return standardShadowMapCameraSettings(frustum, positionedLight, camera);
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if (!standardShadowMapCameraSettings(frustum, positionedLight, camera)) return false;
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return adjustPerspectiveShadowMapCameraSettings(frustum, positionedLight, camera);
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}
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bool ViewDependentShadowMap::adjustPerspectiveShadowMapCameraSettings(Frustum& frustum, LightData& positionedLight, osg::Camera* camera)
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{
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//frustum.projectionMatrix;
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//frustum.modelViewMatrix;
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osg::Matrixd light_p = camera->getProjectionMatrix();
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osg::Matrixd light_v = camera->getViewMatrix();
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osg::Matrixd light_vp = light_v * light_p;
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osg::Vec3d lightdir(0.0,0.0,-1.0);
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OSG_NOTICE<<"light_v="<<light_v<<std::endl;
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OSG_NOTICE<<"light_p="<<light_p<<std::endl;
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osg::Vec3d eye_v = frustum.eye * light_v;
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osg::Vec3d centerNearPlane_v = frustum.centerNearPlane * light_v;
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osg::Vec3d center_v = frustum.center * light_v;
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osg::Vec3d viewdir_v = center_v-eye_v; viewdir_v.normalize();
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double dotProduct_v = lightdir * viewdir_v;
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double gamma_v = acos(dotProduct_v);
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double standardShadowMapToleranceAngle = 0.0;
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if (gamma_v<osg::DegreesToRadians(standardShadowMapToleranceAngle) || gamma_v>osg::DegreesToRadians(180-standardShadowMapToleranceAngle))
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{
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OSG_NOTICE<<"Light and view vectors near parrallel - use standard shadow map."<<std::endl;
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return true;
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}
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OSG_NOTICE<<"eye_v="<<eye_v<<std::endl;
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OSG_NOTICE<<"viewdir_v="<<viewdir_v<<std::endl;
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osg::Vec3d eye_ls = frustum.eye * light_vp;
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osg::Vec3d centerNearPlane_ls = frustum.centerNearPlane * light_vp;
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osg::Vec3d center_ls = frustum.center * light_vp;
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osg::Vec3d viewdir_ls = center_ls-eye_ls; viewdir_ls.normalize();
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double dotProduct = (-lightdir) * viewdir_ls;
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double gamma = acos(dotProduct);
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double sinGamma = sin(gamma_v);
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osg::Vec3d side = lightdir ^ viewdir_ls; side.normalize();
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osg::Vec3d up = side ^ lightdir;
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double nearDist = (centerNearPlane_ls - eye_ls).length();
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double min_y = DBL_MAX;
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double max_y = -DBL_MAX;
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for(unsigned int i=0;i<8;++i)
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{
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osg::Vec3d c_ls = frustum.corners[i] * light_vp;
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if (c_ls.y()<min_y) min_y = c_ls.y();
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if (c_ls.y()>max_y) max_y = c_ls.y();
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OSG_NOTICE<<" corner light space "<<c_ls<<std::endl;
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}
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double d = (max_y-min_y);
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const double factor = 1.0/sinGamma;
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const double z_n = factor*nearDist;
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//perspective transform depth light space y extents
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const double z_f = z_n + d*sinGamma;
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double n = (z_n+sqrt(z_f*z_n))/sinGamma;
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double f = n+d;
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double a = (f+n)/(f-n);
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double b = -2*f*n/(f-n);
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double shift = n-nearDist;
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osg::Vec3d virtual_eye = eye_ls - up*shift;
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osg::Matrixd lightView;
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lightView.makeLookAt(virtual_eye, virtual_eye+lightdir, up);
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OSG_NOTICE<<"Eye world "<<frustum.eye<<std::endl;
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OSG_NOTICE<<"Eye light space "<<eye_ls<<std::endl;
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OSG_NOTICE<<"Center light space "<<center_ls<<std::endl;
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OSG_NOTICE<<"Viewdir light space "<<viewdir_ls<<std::endl;
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OSG_NOTICE<<"gamma_v "<<osg::RadiansToDegrees(gamma_v)<<std::endl;
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OSG_NOTICE<<"gamma "<<osg::RadiansToDegrees(gamma)<<std::endl;
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OSG_NOTICE<<"side "<<side<<std::endl;
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OSG_NOTICE<<"up "<<up<<std::endl;
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OSG_NOTICE<<"min_y = "<<min_y<<std::endl;
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OSG_NOTICE<<"max_y = "<<max_y<<std::endl;
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OSG_NOTICE<<"d = "<<d<<std::endl;
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OSG_NOTICE<<"n = "<<n<<std::endl;
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OSG_NOTICE<<"z_n = "<<z_n<<std::endl;
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OSG_NOTICE<<"z_f = "<<z_f<<std::endl;
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OSG_NOTICE<<"nearDist = "<<nearDist<<std::endl;
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OSG_NOTICE<<"shift = "<<shift<<std::endl;
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#if 0
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osg::Matrixd lightPerspective( 1.0, 0.0, 0.0, 0.0,
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0.0, a, 0.0, 1.0,
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0.0, 0.0, 1.0, 0.0,
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0.0, b, 0.0, 0.0 );
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#else
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osg::Matrixd lightPerspective( 1.0, 0.0, 0.0, 0.0,
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0.0, a, 0.0, 1.0,
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0.0, 0.0, 1.0, 0.0,
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0.0, b, 0.0, 0.0 );
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#endif
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osg::Matrixd light_persp = light_p * lightView * lightPerspective;
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osg::Matrixd light_view_persp = light_v * light_persp;
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double min_x = DBL_MAX;
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double max_x = -DBL_MAX;
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double min_z = DBL_MAX;
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double max_z = -DBL_MAX;
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min_y = DBL_MAX;
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max_y = -DBL_MAX;
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for(unsigned int i=0;i<8;++i)
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{
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osg::Vec3d c_lvp = frustum.corners[i] * light_view_persp;
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if (c_lvp.x()<min_x) min_x = c_lvp.x();
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if (c_lvp.x()>max_x) max_x = c_lvp.x();
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if (c_lvp.y()<min_y) min_y = c_lvp.y();
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if (c_lvp.y()>max_y) max_y = c_lvp.y();
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if (c_lvp.z()<min_z) min_z = c_lvp.z();
|
||||
if (c_lvp.z()>max_z) max_z = c_lvp.z();
|
||||
OSG_NOTICE<<" corner light perspective space "<<c_lvp<<std::endl;
|
||||
}
|
||||
|
||||
OSG_NOTICE<<" min_x="<<min_x<<", max_x="<<max_x<<std::endl;
|
||||
OSG_NOTICE<<" min_y="<<min_y<<", max_y="<<max_y<<std::endl;
|
||||
OSG_NOTICE<<" min_z="<<min_z<<", max_z="<<max_z<<std::endl;
|
||||
|
||||
#if 0
|
||||
osg::Matrix fitToUnitFrustum;
|
||||
fitToUnitFrustum.makeOrtho( min_x, max_x,
|
||||
min_y, max_y,
|
||||
min_z, max_z );
|
||||
|
||||
camera->setProjectionMatrix(light_persp * fitToUnitFrustum);
|
||||
#else
|
||||
camera->setProjectionMatrix(light_persp);
|
||||
#endif
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
bool ViewDependentShadowMap::lightSpacePerspectiveShadowMapCameraSettings(Frustum& frustum, LightData& positionedLight, osg::Camera* camera)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user