Hi,

For futur users : 1- launch these commands to go from python 2 to 3

2to3 -w ./build/SConscript.install 
2to3 -w ./build/SConscript.configure   

2- Use this file config-macos10.12.6-clang-x86_64.py

BUILDDIR       = '#build/release'
DISTDIR        = '#Mitsuba.app'
CXX            = 'clang++'
CC             = 'clang'
CCFLAGS        = ['-mmacosx-version-min=10.12', '-march=native', '-funsafe-math-optimizations', '-fno-math-errno', '-isysroot', '/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk', '-O3', '-Wall', '-Wno-deprecated-declarations', '-g', '-DMTS_DEBUG', '-DSINGLE_PRECISION', '-DSPECTRUM_SAMPLES=3', '-DMTS_SSE', '-DMTS_HAS_COHERENT_RT', '-fvisibility=hidden', '-ftemplate-depth=512', '-stdlib=libc++']
LINKFLAGS      = ['-framework', 'OpenGL', '-framework', 'Cocoa', '-mmacosx-version-min=10.12', '-Wl,-syslibroot,/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk', '-Wl,-headerpad,128', '-stdlib=libc++']
CXXFLAGS       = ['-std=c++11']
BASEINCLUDE    = ['#include', '#dependencies/include']
BASELIBDIR     = ['#dependencies/lib']
BASELIB        = ['m', 'pthread', 'Half']
OEXRINCLUDE    = ['#dependencies/include/OpenEXR']
OEXRLIB        = ['IlmImf', 'Imath', 'Iex', 'z']
PNGLIB         = ['png16']
PNGINCLUDE     = ['#dependencies/include/libpng']
JPEGLIB        = ['jpeg']
JPEGINCLUDE    = ['#dependencies/include/libjpeg']
XERCESLIB      = ['xerces-c']
GLLIB          = ['GLEWmx', 'objc']
GLFLAGS        = ['-DGLEW_MX']
BOOSTINCLUDE   = ['#dependencies']
BOOSTLIB       = ['boost_filesystem', 'boost_system', 'boost_thread']
PYTHON27INCLUDE= ['/System/Library/Frameworks/Python.framework/Versions/2.7/Headers']
PYTHON27LIBDIR = ['/System/Library/Frameworks/Python.framework/Versions/2.7/lib']
PYTHON27LIB    = ['boost_python27', 'boost_system']
PYTHON35INCLUDE= ['#dependencies/include/python3.5']
PYTHON35LIB    = ['boost_python36', 'boost_system']
PYTHON36INCLUDE= ['#dependencies/include/python3.4']
PYTHON36LIB    = ['boost_python36', 'boost_system']
# COLLADAINCLUDE = ['#dependencies/include/collada-dom', '#dependencies/include/collada-dom/1.4']
# COLLADALIB     = ['collada14dom24']
QTDIR          = '#dependencies'
FFTWLIB        = ['fftw3']

Best Regards,

stephane-lb

( Note : this is before updating to High Sierra )

i got this error when try to build Error 1 error MSB3073: The command "cd .. && scons --parallelize --cfg=build\config-win32-msvc2010-debug.py" exited with code 9009. C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V120\Microsoft.MakeFile.Targets 38 5 mitsuba-msvc2010

Hi,

I am trying to compile Mitsuba on my MacBook Pro ( 2012 ) and OS X El Capitan.

this is what I did :

git clone https://github.com/mitsuba-renderer/mitsuba.git 
cd mitsuba
hg clone https://www.mitsuba-renderer.org/hg/dependencies_macos    
mv dependencies_macos  dependencies
mkdir _build
cd _build
cmake ..
make 

First of all the output of the cmake is not perfect, and it should be enough :

CMake Warning at /usr/local/Cellar/cmake/3.6.2/share/cmake-3.6/Modules/FindBoost.cmake:1500 (message):
  No header defined for python27; skipping header check
Call Stack (most recent call first):
  src/libpython/CMakeLists.txt:19 (find_package)

and

CMake Warning (dev):
  Policy CMP0042 is not set: MACOSX_RPATH is enabled by default.  Run "cmake
  --help-policy CMP0042" for policy details.  Use the cmake_policy command to
  set the policy and suppress this warning.

  MACOSX_RPATH is not specified for the following targets:

   mitsuba-bidir
   mitsuba-core
   mitsuba-hw
   mitsuba-render

But my biggest issue, is when I try to compile :

In file included from /Users/Stephane-lb/Projects/mitsuba/src/libcore/bitmap.cpp:65:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/complex:637:23: error: use of undeclared identifier 'INFINITY'
            __x = _Tp(INFINITY) * (__a * __c - __b * __d);
                      ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/complex:638:23: error: use of undeclared identifier 'INFINITY'
            __y = _Tp(INFINITY) * (__a * __d + __b * __c);
                      ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/complex:687:32: error: use of undeclared identifier 'INFINITY'
            __x = copysign(_Tp(INFINITY), __c) * __a;
                               ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/complex:688:32: error: use of undeclared identifier 'INFINITY'
            __y = copysign(_Tp(INFINITY), __c) * __b;
                               ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/complex:694:23: error: use of undeclared identifier 'INFINITY'
            __x = _Tp(INFINITY) * (__a * __c + __b * __d);
                      ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/complex:695:23: error: use of undeclared identifier 'INFINITY'
            __y = _Tp(INFINITY) * (__b * __c - __a * __d);
                      ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/complex:1030:28: error: use of undeclared identifier 'INFINITY'
        __r = complex<_Tp>(INFINITY, copysign(_Tp(0), __c.imag()));
                           ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/complex:1129:33: error: use of undeclared identifier 'INFINITY'
        return complex<_Tp>(_Tp(INFINITY), __x.imag());
                                ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/complex:1301:42: error: use of undeclared identifier 'INFINITY'
        return complex<_Tp>(copysign(_Tp(INFINITY), __x.real()), copysign(_Tp(0), __x.imag()));

What should I do please ? Could you help me with that please?

Thank you very much,

Stéphane

• [x] Changed bibliography package to biblatex (ACM bibtex is no longer supported)
• [x] Added bumpy_sphere
• [x] ~~Added bunny_single~~
• ~~requested scene from Nicolas Holzschuch. Once I've received I'll update the pull request~~
• Material does not seem to work. I've deleted it instead
• [x] Added the missing Holzschuch cite
• [x] Fixed a plugin ref in normalmap
• [x] PDF requires two more runs of pdflatex after bibtex

This pull request (once finished) fixes #23.

The latest version of OS X (Mojave) requires window opening to be done on the main thread (see issue #89). This causes a crash in nsgldevice.mm.

This pull request fixes the issue, by moving the window opening to the main queue, using dispatch_async(dispatch_get_main_queue().

I've tried to compile the mitsuba.

after the scons step I've got the following message: Unable to detect a Qt installation -- not building the GUI! Checking for cl ...no Could not compile a simple C++ fragment, verify that cl is installed! This could also mean that the Boost libraries are missing. The file "config.log" should contain more information.

inside the config.log I've got the following message: file C:\Users\mitsuba-master\build\SConscript.configure,line 137: Configure(confdir = .sconf_temp) scons: Configure: Checking for cl ... .sconf_temp\conftest_0.cpp <- |#include | int main(int argc, char **argv) { | std::ostringstream oss; | return 0; | } cl -o .sconf_temp\conftest_0.o -c /nologo /Od /Z7 /fp:fast /D WIN32 /D WIN64 /W3 /EHsc /GS- /GL /MD /D MTS_DEBUG /D SINGLE_PRECISION /D SPECTRUM_SAMPLES=3 /D MTS_SSE /D MTS_HAS_COHERENT_RT /D _CONSOLE /D DEBUG /D OPENEXR_DLL /openmp /D GLEW_MX -Idependencies\include\openexr -Idependencies\include\openexr -Iinclude -Idependencies\include .sconf_temp\conftest_0.cpp conftest_0.cpp cl : Command line warning D9035 : option 'o' has been deprecated and will be removed in a future release link /nologo /SUBSYSTEM:CONSOLE /DEBUG /MACHINE:X64 /FIXED:NO /OPT:REF /OPT:ICF /LTCG /NODEFAULTLIB:LIBCMT /MANIFEST /OUT:.sconf_temp\conftest_0.exe /LIBPATH:dependencies\lib boost_system-vc141-mt-1_64.lib boost_filesystem-vc141-mt-1_64.lib boost_thread-vc141-mt-1_64.lib msvcrt.lib ws2_32.lib Half.lib zlib.lib .sconf_temp\conftest_0.o LINK : fatal error LNK1181: cannot open input file 'boost_system-vc141-mt-1_64.lib' scons: Configure: no

the file SConscript.configure and SConscript.install

print nok missing ( ) as

if not os.path.exists(configFile):
        print '\nA configuration file must be selected! Have a look at http://www.mitsuba-renderer.org/docs.html'
Exit(1)

I am on trying to build Mitsuba on Ubuntu 16.04, yet I keep getting this error.

g++ -o build/release/integrators/misc/motion.os -c -O3 -Wall -g -pipe -march=nocona -msse2 -ftree-vectorize -mfpmath=sse -funsafe-math-optimizations -fno-rounding-math -fno-signaling-nans -fno-math-errno -fomit-frame-pointer -DMTS_DEBUG -DSINGLE_PRECISION -DSPECTRUM_SAMPLES=3 -DMTS_SSE -DMTS_HAS_COHERENT_RT -fopenmp -fvisibility=hidden -mtls-dialect=gnu2 -fPIC -DMTS_HAS_LIBPNG=1 -DMTS_HAS_LIBJPEG=1 -DMTS_HAS_OPENEXR=1 -DMTS_HAS_FFTW=1 -I/usr/include/eigen3 -I/usr/include/OpenEXR -Iinclude src/integrators/misc/motion.cpp
In file included from /usr/include/eigen3/Eigen/Core:341:0,
                 from include/mitsuba/core/autodiff.h:28,
                 from src/integrators/misc/motion.cpp:21:
/usr/include/eigen3/Eigen/src/Core/functors/AssignmentFunctors.h: In instantiation of ‘void Eigen::internal::mul_assign_op<DstScalar, SrcScalar>::assignCoeff(DstScalar&, const SrcScalar&) const [with DstScalar = DScalar1<float, Eigen::Matrix<float, 1, 7> >; SrcScalar = DScalar1<float, Eigen::Matrix<float, 1, 7> >]’:
/usr/include/eigen3/Eigen/src/Core/AssignEvaluator.h:577:5:   required from ‘void Eigen::internal::generic_dense_assignment_kernel<DstEvaluatorTypeT, SrcEvaluatorTypeT, Functor, Version>::assignCoeff(Eigen::Index) [with DstEvaluatorTypeT = Eigen::internal::evaluator<Eigen::Matrix<DScalar1<float, Eigen::Matrix<float, 1, 7> >, 3, 1, 0, 3, 1> >; SrcEvaluatorTypeT = Eigen::internal::evaluator<Eigen::CwiseNullaryOp<Eigen::internal::scalar_constant_op<DScalar1<float, Eigen::Matrix<float, 1, 7> > >, Eigen::Matrix<DScalar1<float, Eigen::Matrix<float, 1, 7> >, 3, 1, 0, 3, 1> > >; Functor = Eigen::internal::mul_assign_op<DScalar1<float, Eigen::Matrix<float, 1, 7> >, DScalar1<float, Eigen::Matrix<float, 1, 7> > >; int Version = 0; Eigen::Index = long int]’
/usr/include/eigen3/Eigen/src/Core/AssignEvaluator.h:213:5:   required from ‘static void Eigen::internal::copy_using_evaluator_LinearTraversal_CompleteUnrolling<Kernel, Index, Stop>::run(Kernel&) [with Kernel = Eigen::internal::generic_dense_assignment_kernel<Eigen::internal::evaluator<Eigen::Matrix<DScalar1<float, Eigen::Matrix<float, 1, 7> >, 3, 1, 0, 3, 1> >, Eigen::internal::evaluator<Eigen::CwiseNullaryOp<Eigen::internal::scalar_constant_op<DScalar1<float, Eigen::Matrix<float, 1, 7> > >, Eigen::Matrix<DScalar1<float, Eigen::Matrix<float, 1, 7> >, 3, 1, 0, 3, 1> > >, Eigen::internal::mul_assign_op<DScalar1<float, Eigen::Matrix<float, 1, 7> >, DScalar1<float, Eigen::Matrix<float, 1, 7> > >, 0>; int Index = 0; int Stop = 3]’
/usr/include/eigen3/Eigen/src/Core/AssignEvaluator.h:470:106:   required from ‘static void Eigen::internal::dense_assignment_loop<Kernel, 1, 2>::run(Kernel&) [with Kernel = Eigen::internal::generic_dense_assignment_kernel<Eigen::internal::evaluator<Eigen::Matrix<DScalar1<float, Eigen::Matrix<float, 1, 7> >, 3, 1, 0, 3, 1> >, Eigen::internal::evaluator<Eigen::CwiseNullaryOp<Eigen::internal::scalar_constant_op<DScalar1<float, Eigen::Matrix<float, 1, 7> > >, Eigen::Matrix<DScalar1<float, Eigen::Matrix<float, 1, 7> >, 3, 1, 0, 3, 1> > >, Eigen::internal::mul_assign_op<DScalar1<float, Eigen::Matrix<float, 1, 7> >, DScalar1<float, Eigen::Matrix<float, 1, 7> > >, 0>]’
/usr/include/eigen3/Eigen/src/Core/AssignEvaluator.h:653:37:   required from ‘void Eigen::internal::call_dense_assignment_loop(const DstXprType&, const SrcXprType&, const Functor&) [with DstXprType = Eigen::Matrix<DScalar1<float, Eigen::Matrix<float, 1, 7> >, 3, 1, 0, 3, 1>; SrcXprType = Eigen::CwiseNullaryOp<Eigen::internal::scalar_constant_op<DScalar1<float, Eigen::Matrix<float, 1, 7> > >, Eigen::Matrix<DScalar1<float, Eigen::Matrix<float, 1, 7> >, 3, 1, 0, 3, 1> >; Functor = Eigen::internal::mul_assign_op<DScalar1<float, Eigen::Matrix<float, 1, 7> >, DScalar1<float, Eigen::Matrix<float, 1, 7> > >]’
/usr/include/eigen3/Eigen/src/Core/AssignEvaluator.h:790:31:   required from ‘static void Eigen::internal::Assignment<DstXprType, SrcXprType, Functor, Eigen::internal::Dense2Dense, Scalar>::run(DstXprType&, const SrcXprType&, const Functor&) [with DstXprType = Eigen::Matrix<DScalar1<float, Eigen::Matrix<float, 1, 7> >, 3, 1, 0, 3, 1>; SrcXprType = Eigen::CwiseNullaryOp<Eigen::internal::scalar_constant_op<DScalar1<float, Eigen::Matrix<float, 1, 7> > >, Eigen::Matrix<DScalar1<float, Eigen::Matrix<float, 1, 7> >, 3, 1, 0, 3, 1> >; Functor = Eigen::internal::mul_assign_op<DScalar1<float, Eigen::Matrix<float, 1, 7> >, DScalar1<float, Eigen::Matrix<float, 1, 7> > >; Scalar = DScalar1<float, Eigen::Matrix<float, 1, 7> >]’
/usr/include/eigen3/Eigen/src/Core/AssignEvaluator.h:747:49:   required from ‘void Eigen::internal::call_assignment_no_alias(Dst&, const Src&, const Func&) [with Dst = Eigen::Matrix<DScalar1<float, Eigen::Matrix<float, 1, 7> >, 3, 1, 0, 3, 1>; Src = Eigen::CwiseNullaryOp<Eigen::internal::scalar_constant_op<DScalar1<float, Eigen::Matrix<float, 1, 7> > >, Eigen::Matrix<DScalar1<float, Eigen::Matrix<float, 1, 7> >, 3, 1, 0, 3, 1> >; Func = Eigen::internal::mul_assign_op<DScalar1<float, Eigen::Matrix<float, 1, 7> >, DScalar1<float, Eigen::Matrix<float, 1, 7> > >]’
/usr/include/eigen3/Eigen/src/Core/AssignEvaluator.h:712:27:   required from ‘void Eigen::internal::call_assignment(Dst&, const Src&, const Func&, typename Eigen::internal::enable_if<(! Eigen::internal::evaluator_assume_aliasing<Src>::value), void*>::type) [with Dst = Eigen::Matrix<DScalar1<float, Eigen::Matrix<float, 1, 7> >, 3, 1, 0, 3, 1>; Src = Eigen::CwiseNullaryOp<Eigen::internal::scalar_constant_op<DScalar1<float, Eigen::Matrix<float, 1, 7> > >, Eigen::Matrix<DScalar1<float, Eigen::Matrix<float, 1, 7> >, 3, 1, 0, 3, 1> >; Func = Eigen::internal::mul_assign_op<DScalar1<float, Eigen::Matrix<float, 1, 7> >, DScalar1<float, Eigen::Matrix<float, 1, 7> > >; typename Eigen::internal::enable_if<(! Eigen::internal::evaluator_assume_aliasing<Src>::value), void*>::type = void*]’
/usr/include/eigen3/Eigen/src/Core/SelfCwiseBinaryOp.h:19:28:   required from ‘Derived& Eigen::DenseBase<Derived>::operator*=(const Scalar&) [with Derived = Eigen::Matrix<DScalar1<float, Eigen::Matrix<float, 1, 7> >, 3, 1, 0, 3, 1>; Eigen::DenseBase<Derived>::Scalar = DScalar1<float, Eigen::Matrix<float, 1, 7> >]’
src/integrators/misc/motion.cpp:471:7:   required from here
/usr/include/eigen3/Eigen/src/Core/functors/AssignmentFunctors.h:88:102: error: no match for ‘operator*=’ (operand types are ‘DScalar1<float, Eigen::Matrix<float, 1, 7> >’ and ‘const DScalar1<float, Eigen::Matrix<float, 1, 7> >’)
 GEN_DEVICE_FUNC EIGEN_STRONG_INLINE void assignCoeff(DstScalar& a, const SrcScalar& b) const { a *= b; }
                                                                                                  ^
scons: *** [build/release/integrators/misc/motion.os] Error 1
scons: building terminated because of errors.

Am I on a wrong version of Eigen? If so, what version should I be building against?

I need to render a scene that each object has its own color without light and shade. But if no emitter, I can't see that object. So I give an contant emitter. Then for example, the upper face of the cube has shade. But I need it to be all red.

This fixes the NaN errors that occurs due to the new generalised shading frame computation for all shapes. This sets the whole shading frame (including the derivatives) to the geometric frame of the hair shape as it was before the generalisation, just that it is a coordinate system constructed from the normal (both shading and geometric normal are the same).

https://github.com/mitsuba-renderer/mitsuba/blob/0a49106ad17aa01f9465bce17451ac8d674474f1/src/shapes/hair.cpp#L848

It prevents the NaN error caused by this computation for all shapes as dpdu was zero earlier.

https://github.com/mitsuba-renderer/mitsuba/blob/ce80ddcb6d3fe0a7240f7230d9d148d776292f57/include/mitsuba/render/skdtree.h#L424

The hair ball, straight-hair and hair curls scenes all load but there is still an error with the curly hair scene as the kd tree initialisation fails this assertion in single precision. Therefore, in order to use the curly hair scene, mitsuba needs to be compiled in double precision.

https://github.com/mitsuba-renderer/mitsuba/blob/6d7d66175ce4b1bcf7a726e46345d9f24cf7e40c/include/mitsuba/core/aabb.h#L66-L69

#25 #30

I'm trying to compile Mitsuba on Mac OS X Sierra but it doesn't detect the Qt installation from dependancies and therefore doesn't install the GUI. Here's my config.py file:

BUILDDIR = '#build/release' DISTDIR = '#Mitsuba.app' CXX = 'clang++' CC = 'clang' CCFLAGS = ['-mmacosx-version-min=10.12', '-march=native', '-funsafe-math-optimizations', '-fno-math-errno', '-isysroot', '/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk', '-O3', '-Wall', '-Wno-deprecated-declarations', '-g', '-DMTS_DEBUG', '-DSINGLE_PRECISION', '-DSPECTRUM_SAMPLES=3', '-DMTS_SSE', '-DMTS_HAS_COHERENT_RT', '-fvisibility=hidden', '-ftemplate-depth=512', '-stdlib=libc++'] LINKFLAGS = ['-framework', 'OpenGL', '-framework', 'Cocoa', '-mmacosx-version-min=10.12', '-Wl,-syslibroot,/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk', '-Wl,-headerpad,128', '-stdlib=libc++'] CXXFLAGS = ['-std=c++11'] BASEINCLUDE = ['#include', '#dependencies/include'] BASELIBDIR = ['#dependencies/lib'] BASELIB = ['m', 'pthread', 'Half'] OEXRINCLUDE = ['#dependencies/include/OpenEXR'] OEXRLIB = ['IlmImf', 'Imath', 'Iex', 'z'] PNGLIB = ['png16'] PNGINCLUDE = ['#dependencies/include/libpng'] JPEGLIB = ['jpeg'] JPEGINCLUDE = ['#dependencies/include/libjpeg'] XERCESLIB = ['xerces-c'] GLLIB = ['GLEWmx', 'objc'] GLFLAGS = ['-DGLEW_MX'] BOOSTINCLUDE = ['#dependencies'] BOOSTLIB = ['boost_filesystem', 'boost_system', 'boost_thread'] PYTHON27INCLUDE= ['/System/Library/Frameworks/Python.framework/Versions/2.7/Headers'] PYTHON27LIBDIR = ['/System/Library/Frameworks/Python.framework/Versions/2.7/lib'] PYTHON27LIB = ['boost_python27', 'boost_system'] PYTHON35INCLUDE= ['#dependencies/include/python3.5'] PYTHON35LIB = ['boost_python36', 'boost_system'] PYTHON36INCLUDE= ['#dependencies/include/python3.4'] PYTHON36LIB = ['boost_python36', 'boost_system'] COLLADAINCLUDE = ['/usr/local/include/collada-dom2.4', '/usr/local/include/collada-dom2.4/1.4'] COLLADALIBDIR = ['/usr/local/Cellar/collada-dom/2.4.4/lib'] COLLADALIB = ['collada-dom2.4-dp'] QTDIR = '#dependencies' FFTWLIB = ['fftw3']

I keep getting the error when running Scons "Unable to detect a Qt installation -- not building the GUI!". I even tried a local installation on my computer but it still doesn't detect it.

Hello,

I was experimenting a little bit with Mitsuba 3 and doing mi.traverse on a scene I was surprised to observe:

• When wrapping shapes into shape groups, we lose access to all the parameters of the children (they are not displayed by the traverse function)
• It seems possible to differentiate the vertices of a given shape but not the to_world matrix of shapes nor cameras. Is there something to enable to get those. It seems that getting the gradient wrt the to_world matrix should be doable assuming one have the gradient on each individual vertices no ?

Thank you for the clarifications!

Greetings, When I attempt to produced medium rendering, the scene only shows the shadows of the model I produced. I adjusted the scale, but that didn't help either. I attached my xml and image file. Do you know what I may be doing wrong?

XML:

I use Python3 and Scons-v4.3 to build the mitsuba, but was unable to detect the qt5 when building. I try to get the exception from qt5.py, and I find that SCons.Warnings do not have the attribute of Warning When I search the document of Scons-v4.0.1, I see the Warning is inherited from Errors.UserError and has subclass WarningOnByDefault However, from version v4.1.0, I can't find the Warning in the document, instead I find class SConsWarning is inherited from Errors.UserError and has subclass WarningOnByDefault So I change the qt5.py so that it can run in high version Scons and keep it compatible with the low versions.

Greetings, I was looking to create either a model or medium rendering that I can adjust the absorption and scattering coefficient to directly. Is that possible with mitsuba? If so, how?

I was trying to compile mitsuba 0.6.0 on Ubuntu 20.04 machine. I have changed the compiler to -std=gnu++11 for this version of Ubuntu. Previously, I have successfully compiled mitsuba on Ubuntu 16.04 with the compiler set to -std=c++11.

However, on Ubuntu 20.04, I got the following error:

In file included from include/mitsuba/mitsuba.h:52,
                 from src/libhw/glrenderer.cpp:19:
src/libhw/glrenderer.cpp: In member function ‘virtual void mitsuba::GLRenderer::init(mitsuba::Device*, mitsuba::Renderer*)’:
src/libhw/glrenderer.cpp:148:39: warning: ?: using integer constants in boolean context [-Wint-in-bool-context]
  148 |         Log((m_warnLogLevel == EWarn) ? EInfo : m_warnLogLevel,
include/mitsuba/core/logger.h:40:31: note: in definition of macro ‘Log’
   40 |         if (logger != NULL && level >= logger->getLogLevel()) \
      |                               ^~~~~
src/libhw/glrenderer.cpp:197:39: warning: ?: using integer constants in boolean context [-Wint-in-bool-context]
  197 |         Log((m_warnLogLevel == EWarn) ? EInfo : m_warnLogLevel,
include/mitsuba/core/logger.h:40:31: note: in definition of macro ‘Log’
   40 |         if (logger != NULL && level >= logger->getLogLevel()) \
      |                               ^~~~~
In file included from include/mitsuba/mitsuba.h:51,
                 from src/libhw/glrenderer.cpp:19:
include/mitsuba/core/tls.h: In instantiation of ‘static void* mitsuba::PrimitiveThreadLocal<ValueType>::construct() [with ValueType = GLEWContextStruct]’:
include/mitsuba/core/tls.h:118:60:   required from ‘mitsuba::PrimitiveThreadLocal<ValueType>::PrimitiveThreadLocal() [with ValueType = GLEWContextStruct]’
src/libhw/glrenderer.cpp:33:57:   required from here
include/mitsuba/core/tls.h:140:16: error: invalid use of incomplete type ‘struct GLEWContextStruct’
  140 |         return new ValueType();
      |                ^~~~~~~~~~~~~~~
In file included from src/libhw/glrenderer.cpp:25:
include/mitsuba/hw/glrenderer.h:25:8: note: forward declaration of ‘struct GLEWContextStruct’
   25 | struct GLEWContextStruct;
      |        ^~~~~~~~~~~~~~~~~
In file included from include/mitsuba/mitsuba.h:51,
                 from src/libhw/glrenderer.cpp:19:
include/mitsuba/core/tls.h: In instantiation of ‘static void mitsuba::PrimitiveThreadLocal<ValueType>::destruct(void*) [with ValueType = GLEWContextStruct]’:
include/mitsuba/core/tls.h:119:32:   required from ‘mitsuba::PrimitiveThreadLocal<ValueType>::PrimitiveThreadLocal() [with ValueType = GLEWContextStruct]’
src/libhw/glrenderer.cpp:33:57:   required from here
include/mitsuba/core/tls.h:145:13: warning: possible problem detected in invocation of delete operator: [-Wdelete-incomplete]
  145 |             delete static_cast<ValueType *>(data);
      |             ^~~~~~
include/mitsuba/core/tls.h:145:45: warning: invalid use of incomplete type ‘struct GLEWContextStruct’
  145 |             delete static_cast<ValueType *>(data);
      |                                             ^~~~
In file included from src/libhw/glrenderer.cpp:25:
include/mitsuba/hw/glrenderer.h:25:8: note: forward declaration of ‘struct GLEWContextStruct’
   25 | struct GLEWContextStruct;
      |        ^~~~~~~~~~~~~~~~~
In file included from include/mitsuba/mitsuba.h:51,
                 from src/libhw/glrenderer.cpp:19:
include/mitsuba/core/tls.h:145:13: note: neither the destructor nor the class-specific operator delete will be called, even if they are declared when the class is defined
  145 |             delete static_cast<ValueType *>(data);
      |             ^~~~~~
scons: *** [build/release/libhw/glrenderer.os] Error 1
scons: building terminated because of errors.

Any idea how to fix that problem in Ubuntu 20.04?