Commit Graph

49 Commits (8cf431aeb2b80907e25d941ee6078da0236720e7)

Author SHA1 Message Date
AnyOldName3 0edc8fc77d Don't use FFP-friendly texture image units for shadow maps
This more-or-less gets rid of the shadow system's only depencency on FFP
stuff. All that remains is it using OSG cameras, which OSG provides a
uniform-based implementation of, too, which we can trivially migrate to.

This should mean we're not eating any of the ~8 FPP-friendly texture
units, which is good as Morrowind models can use all of those on their
(although they very rarely do), and instead use some of the ~160
shader-only texture image units. This just requires not calling
glEnable(GL_TEXTURE_2D), accomplished by changing
setTextureAttributeAndModes to setTextureAttribute.

Also changes from using glTexGen and its eye plane matrices to pass the
shadow space matrix for each light to explicit uniforms. Thankfully, the
maths was a simple combination of the valid region matrix and eye plane
matrix maths.

As of this commit, I believe this kills shadows in one eye for stereo
rendering.
2 years ago
elsid 063fff7fa4
Fix and prevent -Wextra-semi warning 2 years ago
elsid 50d8bd9cdd
Disable clang-format for files that should have minimal diff with OSG 2 years ago
madsbuvi dd5901d351 Initial commit
Multiview shaders.

Refactor Frustum management

Rewrite shared shadow map

cull mask should respect stereo

Stereo savegame screencap

LocalMap refactoring

use the vertex buffer hint instead of the display list patch to enable/disable display lists

Character preview fixes
3 years ago
elsid 562590720b
Remove ShadowsBin prototype on MWShadowTechnique destruction
To prevent crash:
==7733==ERROR: AddressSanitizer: heap-use-after-free on address 0x6040000ca1b0 at pc 0x55fcfa8d1ee3 bp 0x7ffd1c464e00 sp 0x7ffd1c464df0
READ of size 4 at 0x6040000ca1b0 thread T0
    #0 0x55fcfa8d1ee2 in std::less<unsigned int>::operator()(unsigned int const&, unsigned int const&) const /usr/include/c++/11.1.0/bits/stl_function.h:386
    #1 0x55fcfa8d1ee2 in std::_Rb_tree<unsigned int, std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> >, std::_Select1st<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > >, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > > >::_M_lower_bound(std::_Rb_tree_node<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > >*, std::_Rb_tree_node_base*, unsigned int const&) /usr/include/c++/11.1.0/bits/stl_tree.h:1903
    #2 0x55fcfa8ca76e in std::_Rb_tree<unsigned int, std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> >, std::_Select1st<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > >, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > > >::lower_bound(unsigned int const&) /usr/include/c++/11.1.0/bits/stl_tree.h:1270
    #3 0x55fcfa8ca76e in std::map<unsigned int, osg::ref_ptr<osg::ContextData>, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > > >::lower_bound(unsigned int const&) /usr/include/c++/11.1.0/bits/stl_map.h:1259
    #4 0x55fcfa8ca76e in std::map<unsigned int, osg::ref_ptr<osg::ContextData>, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > > >::operator[](unsigned int const&) /usr/include/c++/11.1.0/bits/stl_map.h:497
    #5 0x55fcfa8ca76e in osg::getOrCreateContextData(unsigned int) /home/elsid/dev/OpenSceneGraph/src/osg/ContextData.cpp:142
    #6 0x55fcfab6848a in GLShaderManager* osg::get<GLShaderManager>(unsigned int) /home/elsid/dev/OpenSceneGraph/include/osg/ContextData:154
    #7 0x55fcfab6848a in osg::Shader::PerContextShader::~PerContextShader() /home/elsid/dev/OpenSceneGraph/src/osg/Shader.cpp:540
    #8 0x55fcfab68dc6 in osg::Shader::PerContextShader::~PerContextShader() /home/elsid/dev/OpenSceneGraph/src/osg/Shader.cpp:541
    #9 0x55fcfab4a3f3 in osg::Referenced::signalObserversAndDelete(bool, bool) const /home/elsid/dev/OpenSceneGraph/src/osg/Referenced.cpp:292
    #10 0x55fcfab6d0ce in osg::Referenced::unref() const /home/elsid/dev/OpenSceneGraph/include/osg/Referenced:201
    #11 0x55fcfab6d0ce in osg::ref_ptr<osg::Shader::PerContextShader>::~ref_ptr() /home/elsid/dev/OpenSceneGraph/include/osg/ref_ptr:44
    #12 0x55fcfab6d0ce in void std::_Destroy<osg::ref_ptr<osg::Shader::PerContextShader> >(osg::ref_ptr<osg::Shader::PerContextShader>*) /usr/include/c++/11.1.0/bits/stl_construct.h:140
    #13 0x55fcfab6d0ce in void std::_Destroy_aux<false>::__destroy<osg::ref_ptr<osg::Shader::PerContextShader>*>(osg::ref_ptr<osg::Shader::PerContextShader>*, osg::ref_ptr<osg::Shader::PerContextShader>*) /usr/include/c++/11.1.0/bits/stl_construct.h:152
    #14 0x55fcfab6d0ce in void std::_Destroy<osg::ref_ptr<osg::Shader::PerContextShader>*>(osg::ref_ptr<osg::Shader::PerContextShader>*, osg::ref_ptr<osg::Shader::PerContextShader>*) /usr/include/c++/11.1.0/bits/stl_construct.h:185
    #15 0x55fcfab6d0ce in void std::_Destroy<osg::ref_ptr<osg::Shader::PerContextShader>*, osg::ref_ptr<osg::Shader::PerContextShader> >(osg::ref_ptr<osg::Shader::PerContextShader>*, osg::ref_ptr<osg::Shader::PerContextShader>*, std::allocator<osg::ref_ptr<osg::Shader::PerContextShader> >&) /usr/include/c++/11.1.0/bits/alloc_traits.h:746
    #16 0x55fcfab6d0ce in std::vector<osg::ref_ptr<osg::Shader::PerContextShader>, std::allocator<osg::ref_ptr<osg::Shader::PerContextShader> > >::~vector() /usr/include/c++/11.1.0/bits/stl_vector.h:680
    #17 0x55fcfab6d0ce in osg::Shader::ShaderObjects::~ShaderObjects() /home/elsid/dev/OpenSceneGraph/include/osg/Shader:264
    #18 0x55fcfab6d0ce in osg::Shader::ShaderObjects::~ShaderObjects() /home/elsid/dev/OpenSceneGraph/include/osg/Shader:264
    #19 0x55fcfab4a3f3 in osg::Referenced::signalObserversAndDelete(bool, bool) const /home/elsid/dev/OpenSceneGraph/src/osg/Referenced.cpp:292
    #20 0x55fcfab6c532 in osg::Referenced::unref() const /home/elsid/dev/OpenSceneGraph/include/osg/Referenced:201
    #21 0x55fcfab6c532 in osg::ref_ptr<osg::Shader::ShaderObjects>::~ref_ptr() /home/elsid/dev/OpenSceneGraph/include/osg/ref_ptr:44
    #22 0x55fcfab6c532 in void std::_Destroy<osg::ref_ptr<osg::Shader::ShaderObjects> >(osg::ref_ptr<osg::Shader::ShaderObjects>*) /usr/include/c++/11.1.0/bits/stl_construct.h:140
    #23 0x55fcfab6c532 in void std::_Destroy_aux<false>::__destroy<osg::ref_ptr<osg::Shader::ShaderObjects>*>(osg::ref_ptr<osg::Shader::ShaderObjects>*, osg::ref_ptr<osg::Shader::ShaderObjects>*) /usr/include/c++/11.1.0/bits/stl_construct.h:152
    #24 0x55fcfab6c532 in void std::_Destroy<osg::ref_ptr<osg::Shader::ShaderObjects>*>(osg::ref_ptr<osg::Shader::ShaderObjects>*, osg::ref_ptr<osg::Shader::ShaderObjects>*) /usr/include/c++/11.1.0/bits/stl_construct.h:185
    #25 0x55fcfab6c532 in void std::_Destroy<osg::ref_ptr<osg::Shader::ShaderObjects>*, osg::ref_ptr<osg::Shader::ShaderObjects> >(osg::ref_ptr<osg::Shader::ShaderObjects>*, osg::ref_ptr<osg::Shader::ShaderObjects>*, std::allocator<osg::ref_ptr<osg::Shader::ShaderObjects> >&) /usr/include/c++/11.1.0/bits/alloc_traits.h:746
    #26 0x55fcfab6c532 in std::vector<osg::ref_ptr<osg::Shader::ShaderObjects>, std::allocator<osg::ref_ptr<osg::Shader::ShaderObjects> > >::~vector() /usr/include/c++/11.1.0/bits/stl_vector.h:680
    #27 0x55fcfab6c532 in osg::buffered_value<osg::ref_ptr<osg::Shader::ShaderObjects> >::~buffered_value() /home/elsid/dev/OpenSceneGraph/include/osg/buffered_value:26
    #28 0x55fcfab6c532 in osg::Shader::~Shader() /home/elsid/dev/OpenSceneGraph/src/osg/Shader.cpp:271
    #29 0x55fcfab6c80a in osg::Shader::~Shader() /home/elsid/dev/OpenSceneGraph/src/osg/Shader.cpp:271
    #30 0x55fcfab4a3f3 in osg::Referenced::signalObserversAndDelete(bool, bool) const /home/elsid/dev/OpenSceneGraph/src/osg/Referenced.cpp:292
    #31 0x55fcfab185bd in osg::Referenced::unref() const /home/elsid/dev/OpenSceneGraph/include/osg/Referenced:201
    #32 0x55fcfab185bd in osg::ref_ptr<osg::Shader>::~ref_ptr() /home/elsid/dev/OpenSceneGraph/include/osg/ref_ptr:44
    #33 0x55fcfab185bd in void std::_Destroy<osg::ref_ptr<osg::Shader> >(osg::ref_ptr<osg::Shader>*) /usr/include/c++/11.1.0/bits/stl_construct.h:140
    #34 0x55fcfab185bd in void std::_Destroy_aux<false>::__destroy<osg::ref_ptr<osg::Shader>*>(osg::ref_ptr<osg::Shader>*, osg::ref_ptr<osg::Shader>*) /usr/include/c++/11.1.0/bits/stl_construct.h:152
    #35 0x55fcfab185bd in void std::_Destroy<osg::ref_ptr<osg::Shader>*>(osg::ref_ptr<osg::Shader>*, osg::ref_ptr<osg::Shader>*) /usr/include/c++/11.1.0/bits/stl_construct.h:185
    #36 0x55fcfab185bd in void std::_Destroy<osg::ref_ptr<osg::Shader>*, osg::ref_ptr<osg::Shader> >(osg::ref_ptr<osg::Shader>*, osg::ref_ptr<osg::Shader>*, std::allocator<osg::ref_ptr<osg::Shader> >&) /usr/include/c++/11.1.0/bits/alloc_traits.h:746
    #37 0x55fcfab185bd in std::vector<osg::ref_ptr<osg::Shader>, std::allocator<osg::ref_ptr<osg::Shader> > >::~vector() /usr/include/c++/11.1.0/bits/stl_vector.h:680
    #38 0x55fcfab185bd in osg::Program::~Program() /home/elsid/dev/OpenSceneGraph/src/osg/Program.cpp:147
    #39 0x55fcfab18ae0 in osg::Program::~Program() /home/elsid/dev/OpenSceneGraph/src/osg/Program.cpp:147
    #40 0x55fcfab4a3f3 in osg::Referenced::signalObserversAndDelete(bool, bool) const /home/elsid/dev/OpenSceneGraph/src/osg/Referenced.cpp:292
    #41 0x55fcf8582cfa in osg::Referenced::unref() const /home/elsid/dev/OpenSceneGraph/build/gcc/asan/install/include/osg/Referenced:201
    #42 0x55fcf8582cfa in osg::ref_ptr<osg::StateAttribute>::~ref_ptr() /home/elsid/dev/OpenSceneGraph/build/gcc/asan/install/include/osg/ref_ptr:44
    #43 0x55fcf8582cfa in std::pair<osg::ref_ptr<osg::StateAttribute>, unsigned int>::~pair() /usr/include/c++/11.1.0/bits/stl_pair.h:211
    #44 0x55fcf8582cfa in std::pair<std::pair<osg::StateAttribute::Type, unsigned int> const, std::pair<osg::ref_ptr<osg::StateAttribute>, unsigned int> >::~pair() /usr/include/c++/11.1.0/bits/stl_pair.h:211
    #45 0x55fcf8582cfa in void __gnu_cxx::new_allocator<std::_Rb_tree_node<std::pair<std::pair<osg::StateAttribute::Type, unsigned int> const, std::pair<osg::ref_ptr<osg::StateAttribute>, unsigned int> > > >::destroy<std::pair<std::pair<osg::StateAttribute::Type, unsigned int> const, std::pair<osg::ref_ptr<osg::StateAttribute>, unsigned int> > >(std::pair<std::pair<osg::StateAttribute::Type, unsigned int> const, std::pair<osg::ref_ptr<osg::StateAttribute>, unsigned int> >*) /usr/include/c++/11.1.0/ext/new_allocator.h:162
    #46 0x55fcf8582cfa in void std::allocator_traits<std::allocator<std::_Rb_tree_node<std::pair<std::pair<osg::StateAttribute::Type, unsigned int> const, std::pair<osg::ref_ptr<osg::StateAttribute>, unsigned int> > > > >::destroy<std::pair<std::pair<osg::StateAttribute::Type, unsigned int> const, std::pair<osg::ref_ptr<osg::StateAttribute>, unsigned int> > >(std::allocator<std::_Rb_tree_node<std::pair<std::pair<osg::StateAttribute::Type, unsigned int> const, std::pair<osg::ref_ptr<osg::StateAttribute>, unsigned int> > > >&, std::pair<std::pair<osg::StateAttribute::Type, unsigned int> const, std::pair<osg::ref_ptr<osg::StateAttribute>, unsigned int> >*) /usr/include/c++/11.1.0/bits/alloc_traits.h:531
    #47 0x55fcf8582cfa in std::_Rb_tree<std::pair<osg::StateAttribute::Type, unsigned int>, std::pair<std::pair<osg::StateAttribute::Type, unsigned int> const, std::pair<osg::ref_ptr<osg::StateAttribute>, unsigned int> >, std::_Select1st<std::pair<std::pair<osg::StateAttribute::Type, unsigned int> const, std::pair<osg::ref_ptr<osg::StateAttribute>, unsigned int> > >, std::less<std::pair<osg::StateAttribute::Type, unsigned int> >, std::allocator<std::pair<std::pair<osg::StateAttribute::Type, unsigned int> const, std::pair<osg::ref_ptr<osg::StateAttribute>, unsigned int> > > >::_M_destroy_node(std::_Rb_tree_node<std::pair<std::pair<osg::StateAttribute::Type, unsigned int> const, std::pair<osg::ref_ptr<osg::StateAttribute>, unsigned int> > >*) /usr/include/c++/11.1.0/bits/stl_tree.h:623
    #48 0x55fcf8582cfa in std::_Rb_tree<std::pair<osg::StateAttribute::Type, unsigned int>, std::pair<std::pair<osg::StateAttribute::Type, unsigned int> const, std::pair<osg::ref_ptr<osg::StateAttribute>, unsigned int> >, std::_Select1st<std::pair<std::pair<osg::StateAttribute::Type, unsigned int> const, std::pair<osg::ref_ptr<osg::StateAttribute>, unsigned int> > >, std::less<std::pair<osg::StateAttribute::Type, unsigned int> >, std::allocator<std::pair<std::pair<osg::StateAttribute::Type, unsigned int> const, std::pair<osg::ref_ptr<osg::StateAttribute>, unsigned int> > > >::_M_drop_node(std::_Rb_tree_node<std::pair<std::pair<osg::StateAttribute::Type, unsigned int> const, std::pair<osg::ref_ptr<osg::StateAttribute>, unsigned int> > >*) /usr/include/c++/11.1.0/bits/stl_tree.h:631
    #49 0x55fcf8582cfa in std::_Rb_tree<std::pair<osg::StateAttribute::Type, unsigned int>, std::pair<std::pair<osg::StateAttribute::Type, unsigned int> const, std::pair<osg::ref_ptr<osg::StateAttribute>, unsigned int> >, std::_Select1st<std::pair<std::pair<osg::StateAttribute::Type, unsigned int> const, std::pair<osg::ref_ptr<osg::StateAttribute>, unsigned int> > >, std::less<std::pair<osg::StateAttribute::Type, unsigned int> >, std::allocator<std::pair<std::pair<osg::StateAttribute::Type, unsigned int> const, std::pair<osg::ref_ptr<osg::StateAttribute>, unsigned int> > > >::_M_erase(std::_Rb_tree_node<std::pair<std::pair<osg::StateAttribute::Type, unsigned int> const, std::pair<osg::ref_ptr<osg::StateAttribute>, unsigned int> > >*) /usr/include/c++/11.1.0/bits/stl_tree.h:1889
    #50 0x55fcfac1f281 in std::_Rb_tree<std::pair<osg::StateAttribute::Type, unsigned int>, std::pair<std::pair<osg::StateAttribute::Type, unsigned int> const, std::pair<osg::ref_ptr<osg::StateAttribute>, unsigned int> >, std::_Select1st<std::pair<std::pair<osg::StateAttribute::Type, unsigned int> const, std::pair<osg::ref_ptr<osg::StateAttribute>, unsigned int> > >, std::less<std::pair<osg::StateAttribute::Type, unsigned int> >, std::allocator<std::pair<std::pair<osg::StateAttribute::Type, unsigned int> const, std::pair<osg::ref_ptr<osg::StateAttribute>, unsigned int> > > >::clear() /usr/include/c++/11.1.0/bits/stl_tree.h:1254
    #51 0x55fcfac1f281 in std::map<std::pair<osg::StateAttribute::Type, unsigned int>, std::pair<osg::ref_ptr<osg::StateAttribute>, unsigned int>, std::less<std::pair<osg::StateAttribute::Type, unsigned int> >, std::allocator<std::pair<std::pair<osg::StateAttribute::Type, unsigned int> const, std::pair<osg::ref_ptr<osg::StateAttribute>, unsigned int> > > >::clear() /usr/include/c++/11.1.0/bits/stl_map.h:1134
    #52 0x55fcfac1f281 in osg::StateSet::clear() /home/elsid/dev/OpenSceneGraph/src/osg/StateSet.cpp:738
    #53 0x55fcfac2079e in osg::StateSet::~StateSet() /home/elsid/dev/OpenSceneGraph/src/osg/StateSet.cpp:285
    #54 0x55fcfac20d3e in osg::StateSet::~StateSet() /home/elsid/dev/OpenSceneGraph/src/osg/StateSet.cpp:286
    #55 0x55fcfab4a3f3 in osg::Referenced::signalObserversAndDelete(bool, bool) const /home/elsid/dev/OpenSceneGraph/src/osg/Referenced.cpp:292
    #56 0x55fcfb20dcac in osg::Referenced::unref() const /home/elsid/dev/OpenSceneGraph/build/gcc/asan/install/include/osg/Referenced:201
    #57 0x55fcfb20dcac in osg::ref_ptr<osg::StateSet>::~ref_ptr() /home/elsid/dev/OpenSceneGraph/build/gcc/asan/install/include/osg/ref_ptr:44
    #58 0x55fcfb20dcac in std::array<osg::ref_ptr<osg::StateSet>, 8ul>::~array() /usr/include/c++/11.1.0/array:95
    #59 0x55fcfb20dcac in SceneUtil::ShadowsBin::~ShadowsBin() /home/elsid/dev/openmw/components/sceneutil/shadowsbin.hpp:16
    #60 0x55fcfb20dcac in SceneUtil::ShadowsBin::~ShadowsBin() /home/elsid/dev/openmw/components/sceneutil/shadowsbin.hpp:16
    #61 0x55fcfab4a3f3 in osg::Referenced::signalObserversAndDelete(bool, bool) const /home/elsid/dev/OpenSceneGraph/src/osg/Referenced.cpp:292
    #62 0x55fcfa6cc17f in osg::Referenced::unref() const /home/elsid/dev/OpenSceneGraph/include/osg/Referenced:201
    #63 0x55fcfa6cc17f in osg::ref_ptr<osgUtil::RenderBin>::~ref_ptr() /home/elsid/dev/OpenSceneGraph/include/osg/ref_ptr:44
    #64 0x55fcfa6cc17f in std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> >::~pair() /usr/include/c++/11.1.0/bits/stl_pair.h:211
    #65 0x55fcfa6cc17f in void __gnu_cxx::new_allocator<std::_Rb_tree_node<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> > > >::destroy<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> > >(std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> >*) /usr/include/c++/11.1.0/ext/new_allocator.h:162
    #66 0x55fcfa6cc17f in void std::allocator_traits<std::allocator<std::_Rb_tree_node<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> > > > >::destroy<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> > >(std::allocator<std::_Rb_tree_node<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> > > >&, std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> >*) /usr/include/c++/11.1.0/bits/alloc_traits.h:531
    #67 0x55fcfa6cc17f in std::_Rb_tree<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> >, std::_Select1st<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> > >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> > > >::_M_destroy_node(std::_Rb_tree_node<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> > >*) /usr/include/c++/11.1.0/bits/stl_tree.h:623
    #68 0x55fcfa6cc17f in std::_Rb_tree<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> >, std::_Select1st<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> > >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> > > >::_M_drop_node(std::_Rb_tree_node<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> > >*) /usr/include/c++/11.1.0/bits/stl_tree.h:631
    #69 0x55fcfa6cc17f in std::_Rb_tree<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> >, std::_Select1st<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> > >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> > > >::_M_erase(std::_Rb_tree_node<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> > >*) /usr/include/c++/11.1.0/bits/stl_tree.h:1889
    #70 0x55fcfa6cc122 in std::_Rb_tree<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> >, std::_Select1st<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> > >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> > > >::_M_erase(std::_Rb_tree_node<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> > >*) /usr/include/c++/11.1.0/bits/stl_tree.h:1887
    #71 0x55fcfa6cc122 in std::_Rb_tree<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> >, std::_Select1st<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> > >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> > > >::_M_erase(std::_Rb_tree_node<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> > >*) /usr/include/c++/11.1.0/bits/stl_tree.h:1887
    #72 0x55fcfa6cc245 in std::_Rb_tree<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> >, std::_Select1st<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> > >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> > > >::~_Rb_tree() /usr/include/c++/11.1.0/bits/stl_tree.h:984
    #73 0x55fcfa6cc245 in std::map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, osg::ref_ptr<osgUtil::RenderBin>, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, osg::ref_ptr<osgUtil::RenderBin> > > >::~map() /usr/include/c++/11.1.0/bits/stl_map.h:302
    #74 0x55fcfa6cc245 in RenderBinPrototypeList::~RenderBinPrototypeList() /home/elsid/dev/OpenSceneGraph/src/osgUtil/RenderBin.cpp:48
    #75 0x55fcfa6cc245 in RenderBinPrototypeList::~RenderBinPrototypeList() /home/elsid/dev/OpenSceneGraph/src/osgUtil/RenderBin.cpp:48
    #76 0x55fcfab4a3f3 in osg::Referenced::signalObserversAndDelete(bool, bool) const /home/elsid/dev/OpenSceneGraph/src/osg/Referenced.cpp:292
    #77 0x55fcfa6cbcc1 in osg::Referenced::unref() const /home/elsid/dev/OpenSceneGraph/include/osg/Referenced:201
    #78 0x55fcfa6cbcc1 in osg::ref_ptr<RenderBinPrototypeList>::~ref_ptr() /home/elsid/dev/OpenSceneGraph/include/osg/ref_ptr:44
    #79 0x7f3977bd04a6 in __run_exit_handlers (/usr/lib/libc.so.6+0x3f4a6)
    #80 0x7f3977bd064d in exit (/usr/lib/libc.so.6+0x3f64d)
    #81 0x7f3977bb8b2b in __libc_start_main (/usr/lib/libc.so.6+0x27b2b)
    #82 0x55fcf81ea12d in _start (/home/elsid/dev/openmw/build/gcc/asan/openmw+0xa4412d)

0x6040000ca1b0 is located 32 bytes inside of 48-byte region [0x6040000ca190,0x6040000ca1c0)
freed by thread T0 here:
    #0 0x7f397a633d69 in operator delete(void*, unsigned long) /build/gcc/src/gcc/libsanitizer/asan/asan_new_delete.cpp:172
    #1 0x55fcfa8d1824 in __gnu_cxx::new_allocator<std::_Rb_tree_node<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > > >::deallocate(std::_Rb_tree_node<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > >*, unsigned long) /usr/include/c++/11.1.0/ext/new_allocator.h:139
    #2 0x55fcfa8d1824 in std::allocator_traits<std::allocator<std::_Rb_tree_node<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > > > >::deallocate(std::allocator<std::_Rb_tree_node<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > > >&, std::_Rb_tree_node<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > >*, unsigned long) /usr/include/c++/11.1.0/bits/alloc_traits.h:492
    #3 0x55fcfa8d1824 in std::_Rb_tree<unsigned int, std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> >, std::_Select1st<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > >, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > > >::_M_put_node(std::_Rb_tree_node<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > >*) /usr/include/c++/11.1.0/bits/stl_tree.h:565
    #4 0x55fcfa8d1824 in std::_Rb_tree<unsigned int, std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> >, std::_Select1st<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > >, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > > >::_M_drop_node(std::_Rb_tree_node<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > >*) /usr/include/c++/11.1.0/bits/stl_tree.h:632
    #5 0x55fcfa8d1824 in std::_Rb_tree<unsigned int, std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> >, std::_Select1st<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > >, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > > >::_M_erase(std::_Rb_tree_node<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > >*) /usr/include/c++/11.1.0/bits/stl_tree.h:1889
    #6 0x55fcfa8d18da in std::_Rb_tree<unsigned int, std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> >, std::_Select1st<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > >, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > > >::~_Rb_tree() /usr/include/c++/11.1.0/bits/stl_tree.h:984
    #7 0x55fcfa8d18da in std::map<unsigned int, osg::ref_ptr<osg::ContextData>, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > > >::~map() /usr/include/c++/11.1.0/bits/stl_map.h:302
    #8 0x7f3977bd04a6 in __run_exit_handlers (/usr/lib/libc.so.6+0x3f4a6)

previously allocated by thread T0 here:
    #0 0x7f397a632ca1 in operator new(unsigned long) /build/gcc/src/gcc/libsanitizer/asan/asan_new_delete.cpp:99
    #1 0x55fcfa8d3aa1 in __gnu_cxx::new_allocator<std::_Rb_tree_node<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > > >::allocate(unsigned long, void const*) /usr/include/c++/11.1.0/ext/new_allocator.h:121
    #2 0x55fcfa8d3aa1 in std::allocator_traits<std::allocator<std::_Rb_tree_node<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > > > >::allocate(std::allocator<std::_Rb_tree_node<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > > >&, unsigned long) /usr/include/c++/11.1.0/bits/alloc_traits.h:460
    #3 0x55fcfa8d3aa1 in std::_Rb_tree<unsigned int, std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> >, std::_Select1st<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > >, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > > >::_M_get_node() /usr/include/c++/11.1.0/bits/stl_tree.h:561
    #4 0x55fcfa8d3aa1 in std::_Rb_tree_node<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > >* std::_Rb_tree<unsigned int, std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> >, std::_Select1st<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > >, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > > >::_M_create_node<std::piecewise_construct_t const&, std::tuple<unsigned int const&>, std::tuple<> >(std::piecewise_construct_t const&, std::tuple<unsigned int const&>&&, std::tuple<>&&) /usr/include/c++/11.1.0/bits/stl_tree.h:611
    #5 0x55fcfa8d3aa1 in std::_Rb_tree_iterator<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > > std::_Rb_tree<unsigned int, std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> >, std::_Select1st<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > >, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > > >::_M_emplace_hint_unique<std::piecewise_construct_t const&, std::tuple<unsigned int const&>, std::tuple<> >(std::_Rb_tree_const_iterator<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > >, std::piecewise_construct_t const&, std::tuple<unsigned int const&>&&, std::tuple<>&&) /usr/include/c++/11.1.0/bits/stl_tree.h:2429
    #6 0x55fcfa8cfd91 in std::map<unsigned int, osg::ref_ptr<osg::ContextData>, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, osg::ref_ptr<osg::ContextData> > > >::operator[](unsigned int const&) /usr/include/c++/11.1.0/bits/stl_map.h:501
    #7 0x55fcfa8cfd91 in osg::ContextData::createNewContextID() /home/elsid/dev/OpenSceneGraph/src/osg/ContextData.cpp:171
    #8 0x55fcfa9be218 in osg::GraphicsContext::createNewContextID() /home/elsid/dev/OpenSceneGraph/src/osg/GraphicsContext.cpp:320
    #9 0x55fcfb68d1ef in SDLUtil::GraphicsWindowSDL2::GraphicsWindowSDL2(osg::GraphicsContext::Traits*) /home/elsid/dev/openmw/components/sdlutil/sdlgraphicswindow.cpp:39
    #10 0x55fcfa17f93a in OMW::Engine::createWindow(Settings::Manager&) /home/elsid/dev/openmw/apps/openmw/engine.cpp:611
    #11 0x55fcfa18398f in OMW::Engine::prepareEngine(Settings::Manager&) /home/elsid/dev/openmw/apps/openmw/engine.cpp:679
    #12 0x55fcfa18c4f2 in OMW::Engine::go() /home/elsid/dev/openmw/apps/openmw/engine.cpp:949
    #13 0x55fcfa13c9ff in runApplication(int, char**) /home/elsid/dev/openmw/apps/openmw/main.cpp:316
    #14 0x55fcfb49f562 in wrapApplication(int (*)(int, char**), int, char**, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) /home/elsid/dev/openmw/components/debug/debugging.cpp:205
    #15 0x55fcfa133114 in main /home/elsid/dev/openmw/apps/openmw/main.cpp:328
    #16 0x7f3977bb8b24 in __libc_start_main (/usr/lib/libc.so.6+0x27b24)

SUMMARY: AddressSanitizer: heap-use-after-free /usr/include/c++/11.1.0/bits/stl_function.h:386 in std::less<unsigned int>::operator()(unsigned int const&, unsigned int const&) const
Shadow bytes around the buggy address:
  0x0c08800113e0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c08800113f0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c0880011400: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c0880011410: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c0880011420: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x0c0880011430: fa fa fd fd fd fd[fd]fd fa fa fa fa fa fa fa fa
  0x0c0880011440: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c0880011450: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c0880011460: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c0880011470: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c0880011480: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
Shadow byte legend (one shadow byte represents 8 application bytes):
  Addressable:           00
  Partially addressable: 01 02 03 04 05 06 07
  Heap left redzone:       fa
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  Stack after return:      f5
  Stack use after scope:   f8
  Global redzone:          f9
  Global init order:       f6
  Poisoned by user:        f7
  Container overflow:      fc
  Array cookie:            ac
  Intra object redzone:    bb
  ASan internal:           fe
  Left alloca redzone:     ca
  Right alloca redzone:    cb
  Shadow gap:              cc
==7733==ABORTING
3 years ago
Bo Svensson 93848ef01c
avoids virtual function calls in ComputeLightSpaceBounds (#3167)
osg::NodeVisitor is designed to recursively call virtual apply signatures until we find an implemented signature. Encountered nodes that we do not explicitely handle will trigger additional virtual function calls. With this PR we avoid these additional virtual function calls in the particularly costly ComputeLightSpaceBounds by adding some explicit signatures.
3 years ago
Bo Svensson 98f8295765
allows to skip ComputeLightSpaceBounds traversal (#3152)
Currently, we always traverse the scene graph an additional time with a ComputeLightSpaceBounds visitor during shadow casting. ComputeLightSpaceBounds is only useful when the shadow casting mask allows us to shrink the bounds of the rendered scene, so we guard its traversal with a check against getCastsShadowTraversalMask. In practice, this guard never works because we build the traversal mask inclusively.

With this PR we limit the getCastsShadowTraversalMask check to relevant masks. This new check allows us to skip a superfluous ComputeLightSpaceBounds traversal with most settings.
3 years ago
Bo Svensson 5242e2695c
avoids memory allocations within ComputeLightSpaceBounds (#3156)
Currently, we create a new ComputeLightSpaceBounds visitor per frame. Within this visitor, we require excessive memory allocations, mainly a new osg::RefMatrix per encountered Transform node.

With this PR we reuse a single ComputeLightSpaceBounds visitor across frames and enable the createOrReuseMatrix functionality to avoid allocating new matrices every frame. osgUtil::CullVisitor internally uses the same approach.
3 years ago
AnyOldName3 4f510d85ba Merge remote-tracking branch 'upstream/master' into alpha-meddling 4 years ago
AnyOldName3 3e273a759a Clarify method name now we're using it differently 4 years ago
AnyOldName3 05ad44d0b1 Set correct array size 4 years ago
AnyOldName3 ce2bcba5d4 Replace deprecated alpha test in shader visitor 4 years ago
AnyOldName3 7768556ce6 Set dummy state when disabling shadows indoors
As we don't reconfigure all shaders without shadows when we disable them
indoors (as it'd probably add a hitch to transitioning in and out) we
need to set up dummy state so the shaders don't do anything illegal.

This hadn't had symptoms for most objects as when indoors, nearly
everything would be drawn first in one of the water RTTs, which had
dummy state to disable shadows already. This wasn't true of the water
plane itself, though, yet somehow it took until just now for anyone to
report that.

This resolves vtastek's issue where the water would be invisible indoors
4 years ago
AnyOldName3 72f7e6a702 Handle all shadow alpha uniforms in shadowsbin 4 years ago
Andrei Kortunov 8ca3c3b123 Mark overrided methods by override keyword 4 years ago
AnyOldName3 707204133d Double-buffer shadow uniforms that change each frame 4 years ago
AnyOldName3 ce98d7053b Double buffer view-dependent data stateset 4 years ago
AnyOldName3 98b2d5d921 Make shadow debug HUD thread-safe
* Double buffer the frustum uniforms.
* Don't mess with the debug geometry's StateSet.
* Change two-element vectors to arrays so the size is explicit.
4 years ago
elsid 40ad87bc4d
Replace OpenThreads by std types 5 years ago
AnyOldName3 12044a607b Only alpha-test shadows when necessary
Previously we always discarded shadow map fragments if the alpha channel of the output would have been low, but there were some (modded) assets that have non-one alpha but have testing or blending disabled so end up opaque anyway. This lets the shadows of those objects match.
5 years ago
elsid 2e1d8a5e55
Remove unused virtual modifiers in DebugHUD
/home/elsid/dev/openmw/components/sceneutil/mwshadowtechnique.cpp:3127:9: warning: Call to virtual function during construction [clang-analyzer-optin.cplusplus.VirtualCall]
        addAnotherShadowMap();
        ^
/home/elsid/dev/openmw/components/sceneutil/mwshadowtechnique.cpp:3094:5: note: Loop condition is true.  Entering loop body
    for (int i = 0; i < 2; ++i)
    ^
/home/elsid/dev/openmw/components/sceneutil/mwshadowtechnique.cpp:3094:5: note: Loop condition is true.  Entering loop body
/home/elsid/dev/openmw/components/sceneutil/mwshadowtechnique.cpp:3094:5: note: Loop condition is false. Execution continues on line 3102
/home/elsid/dev/openmw/components/sceneutil/mwshadowtechnique.cpp:3126:21: note: Assuming 'i' is < 'numberOfShadowMapsPerLight'
    for (int i = 0; i < numberOfShadowMapsPerLight; ++i)
                    ^
/home/elsid/dev/openmw/components/sceneutil/mwshadowtechnique.cpp:3126:5: note: Loop condition is true.  Entering loop body
    for (int i = 0; i < numberOfShadowMapsPerLight; ++i)
    ^
/home/elsid/dev/openmw/components/sceneutil/mwshadowtechnique.cpp:3127:9: note: This constructor of an object of type 'DebugHUD' has not returned when the virtual method was called
        addAnotherShadowMap();
        ^
/home/elsid/dev/openmw/components/sceneutil/mwshadowtechnique.cpp:3127:9: note: Call to virtual function during construction
5 years ago
bzzt b6ed2f1718 Add optional shadow map max distance and fading 5 years ago
AnyOldName3 d34724a3c4 Hopefully fix Clang warning about hiding overloaded virtual functions 6 years ago
AnyOldName3 0c8ad0a3bb Double buffer debug HUD frustum geometries to prevent race conditions. 6 years ago
AnyOldName3 0a409c0ab8 Make shadow map front-face culling configurable 6 years ago
AnyOldName3 dd207d9e54 Make the shadow polygon offset parameters configurable 6 years ago
AnyOldName3 061fa57335 Switch to better-performing data types for debug hud geometry 6 years ago
AnyOldName3 474770eca8 Switch shadow map rendering to a specialised, simplified shader. 6 years ago
AnyOldName3 db707a31ec Add clipping planes when allow shadow map overlap is enabled 6 years ago
AnyOldName3 2c30bc1b4f Accidentally fix the one remaing case where shadows look awful while refactoring some stuff. 7 years ago
AnyOldName3 7255c266ba Merge branch 'osgshadow-test-vdsm' into osgshadow-test-dicking-around-with-cascading-shadow-maps 7 years ago
AnyOldName3 fc1aee10f4 Remove function declaration that somehow snuck in. 7 years ago
AnyOldName3 1b30d47d7f Add a hacky temporary version of cascading shadow maps 7 years ago
AnyOldName3 166e7df778 Improve debug HUD frustum 7 years ago
AnyOldName3 4547151863 Add the view frustum to the debug HUD (in the most annoying way possible) 7 years ago
AnyOldName3 882b63cba9 Make split point control parameters configurable with the new shadow technique. 7 years ago
AnyOldName3 e233dae1cd Hook up the new shadow technique 7 years ago
AnyOldName3 97b607fc66 Make whitespace match upstream OSG 7 years ago
AnyOldName3 639a4f5e8c Remove TODO left in by accident. Also, become 100 commits ahead of upstream. 7 years ago
AnyOldName3 478367bef3 Ensure the debug HUD won't crash if settings are changed at runtime. 7 years ago
AnyOldName3 7b52091a82 Make the debug hud enableable 7 years ago
AnyOldName3 5d719e9d5f Add the debug HUD to the new shadow technique 7 years ago
AnyOldName3 76f23c28b1 Make shadows disableable. 7 years ago
AnyOldName3 4c31b38f77 Move CLSB changes to new shadow technique 7 years ago
AnyOldName3 06b2ce6646 Fix alignment issues caused by renaming classes 7 years ago
AnyOldName3 7bd4c5e4b3 Change class name 7 years ago
AnyOldName3 c815366044 Move to the correct namespace part 2 7 years ago
AnyOldName3 11e59d3c11 Move to the correct namespace. 7 years ago
AnyOldName3 324b398d29 Add a notice clarifying the source of the shadow technique files. 7 years ago