[开发工具] Mitsuba依赖更新及编译记录(VS2019+Python3)

开发: C++知识库 Java知识库 JavaScript Python PHP知识库人工智能区块链大数据移动开发嵌入式开发工具数据结构与算法开发测试游戏开发网络协议系统运维
教程: HTML教程 CSS教程 JavaScript教程 Go语言教程 JQuery教程 VUE教程 VUE3教程 Bootstrap教程 SQL数据库教程 C语言教程 C++教程 Java教程 Python教程 Python3教程 C#教程
数码: 电脑笔记本显卡显示器固态硬盘硬盘耳机手机 iphone vivo oppo 小米华为单反装机图拉丁

-> 开发工具 -> Mitsuba依赖更新及编译记录(VS2019+Python3) -> 正文阅读

[开发工具]Mitsuba依赖更新及编译记录(VS2019+Python3)

这篇文章主要记录了更新Mitsuba依赖, 以及在VS2019, Python3.9等等比较现代的环境下编译的过程.
为了编译Mitsuba, 我写了一个CMakeLists专门用来下载和编译依赖; 源码也为了适应新的依赖做了一点修改. 修改后的版本已经放在了Github上, 按照 Readme 应当是能够直接编译的. (有问题欢迎issue, 我会尽量回复)

Mitsuba

Mitsuba是面向科研的离线渲染框架, 虽然现在已经有了Mitsuba2, 但 Mitsuba 0.6.0 还是因为功能齐全/简单好用, 经常在各种Siggraph论文里被用于实现算法.
用Mitsuba最麻烦的一点是年久失修, 这里指的是编译的工具链过时. Mitsuba的代码质量非常优秀, 只是因为太久没有更新维护导致各种依赖跟不上现在的版本.
编译思路主要是自行编译依赖. 如果手动下载, 配置和编译依赖肯定会很麻烦. 但是幸好我们有CMake, 只要几行代码就可以自动编译一个库, 编译完还能将依赖拷贝到对应的地方.

环境/准备工作

这里所指的环境是必须手动去官网准备的, 因为这些软件安装比较麻烦, 个人没办法简单地用脚本完成环境配置, 所以需要手动下载和安装
注意这里的环境只要大版本相同即可, 小版本是我的个人选择

Visual Studio 2019 (MSVC/cl)
CMake
Mitsuba源码(分支 scons-python3): git clone https://github.com/mitsuba-renderer/mitsuba.git --branch scons-python3

Python 3.9: (更新/更老的Python3都可以, 个人用的是3.9)
Scons 4.3.1: pip install SCons
Qt 5.15: 可以只选择最新版本的Qt5, 需要安装与VS版本相同的64位版本(例如VS2019, 64bit)

依赖

这是整个编译过程中最麻烦, 花费时间最多的部分. Mitsuba官方提供了编译好的依赖, 但就是因为他们是编译好的, 有些依赖在VS2019下链接不上. 所以需要自行把Mitsuba的依赖进行更新.

注意: 这一部分的所有命令行操作请在 64 位的 VS Command Prompt 下执行, 否则cl.exe, lib.exe等等可能会找不到命令

通过CMake下载和编译依赖

我写了一个CMake的脚本, 将Mitsuba用到的依赖都更新到了当前最新(?)的版本, 脚本可在Github上自取. 依赖编译的时间会比较长, 需要耐心等待.

在使用之前, 需要做部分说明

再次强调, 所有命令行操作请在 64 位的 VS Command Prompt 下执行
请确保网络状况良好, 能够下载和克隆外网/github上的内容. 代理请开启全局代理
CMakeLists.txt中有部分内容需要自行修改:
- Line7: set(COMPILE_THREAD 20) 这里设置的是编译依赖时并行的线程数, 20表示使用20个线程, 设置为本机CPU核数即可.
- Line8 & Line9: 这里设置的是下载时的代理, 如果你不需要, 或者你不知道这是什么意思, 请将这两行注释掉.
如果你的网络状况不好, 没有办法通过CMake下载, 或者下载下来的东西是损坏的/是0KB的, 那请参考后面"依赖列表"部分, 手动下载/克隆依赖, 然后放到dependencies/Downloads中. 完成下载后再接着下面的步骤运行

具体使用的步骤是这样的:

在Mitsuba项目下新建dependencies文件夹, 然后将CMakeLists.txt复制进去
命令行进入dependencies目录
运行cmake ./

经过漫长的编译后, 依赖就配置完成了. 如果你不确定有没有完成, 那没有关系, 也可以直接跳到"Mitsuba编译"部分. 发生依赖错误的时候在回来, 然后将CMakeLists.txt中其他的依赖配置代码注释掉, 只留下没有配置成功的依赖, 然后再次运行cmake ./.

依赖列表

下面是CMakeLists.txt中包含的依赖列表, 如果你的网络是在太差, 或者不知道怎么让CMake通过代理下载/克隆依赖, 可以参考下面的列表, 手动将需要下载的内容下载好.
这里面所有需要下载/克隆的内容, 无论是压缩包还是文件, 还是文件夹, 都放在dependencies/Downloads下即可
下面的列表"路径/文件名"一列中, 带"/"表示这是文件夹, 否则是文件

依赖	路径/文件名	克隆命令/下载地址
version	`version`	https://github.com/mitsuba-renderer/dependencies_win64/raw/master/version
zlib	`zlib/`	`git clone --recurse-submodules https://github.com/madler/zlib.git`
OpenEXR	`openexr/`	`git clone --recurse-submodules https://github.com/AcademySoftwareFoundation/openexr.git`
libjpeg-turbo	`libjpeg/`	`git clone --recurse-submodules https://github.com/libjpeg-turbo/libjpeg-turbo.git`
libpng	`libpng/`	`git clone --recurse-submodules https://github.com/glennrp/libpng.git`
boost	`boost/`	`git clone --recurse-submodules --depth=1 --branch=boost-1.77.0 https://github.com/boostorg/boost.git`
xerces-c	`xerces-c/`	`git clone --recurse-submodules https://github.com/apache/xerces-c.git`
glew	`glew-2.2.0-win32.zip`	https://github.com/nigels-com/glew/releases/download/glew-2.2.0/glew-2.2.0-win32.zip
half	`half-2.2.0.zip`	https://iweb.dl.sourceforge.net/project/half/half/2.2.0/half-2.2.0.zip
glext	`glext.h`	https://www.khronos.org/registry/OpenGL/api/GL/glext.h
khr	`khrplatform.h`	https://www.khronos.org/registry/EGL/api/KHR/khrplatform.h
FFTW	`fftw-3.3.5-dll64.zip`	https://fftw.org/pub/fftw/fftw-3.3.5-dll64.zip

源码编译

以上的依赖已经完成了编译和配置后, 依赖的路径是这样的
- dependencies/include: 包含*.h, *.hpp等头文件
- dependencies/lib: 包含*.lib等库文件
- dependencies/bin: 包含*.dll, *.bin等可执行文件

配置和编译

修改配置文件

Mitsuba依靠SCons进行编译, 由于Mitsuba原始的SCons是基于Python2的, 而且Mitsuba的依赖也是我们自己编译的最新版本, 所以需要修改配置文件.
这里的部分配置会涉及到依赖的版本, 如果你的环境/依赖与我不同, 请自行做微调(例如v142调成v141, Qt的安装目录做些修改之类的). 最关键的就是, 要把你的依赖名称/目录写正确, 让编译器能够找到这个依赖.

`config.py`

SCons需要读取项目根目录下的config.py作为配置, Mitsuba官方在build/下提供了几个模板, 我们基于这些模板来做修改: 复制build/config-win64-msvc2017.py到config.py
- BASELIB: BASELIB中的Half现在仅包含头文件, 所以可以去掉Half
- OEXRINCLUDE: OpenEXR现在将依赖目录分为了两个, 需要都添加进去OEXRINCLUDE = ['#dependencies/include/OpenEXR', '#dependencies/include/Imath']
- OEXRLIB: OpenEXR的库已经更名, 现在应当为: OEXRLIB = ['OpenEXR-3_1', 'IlmThread-3_1', 'Iex-3_1', 'zlib']
BOOSTINCLUDE: 源文件中没有这一项, 但是我们的boost includ目录有些不一样, 所以需要加上: BOOSTINCLUDE = ['#dependencies/include/boost-1_77']
BOOSTLIB: boost system现在不会被编译为库了, 所以需要移除. 另外boost是我们自行编译的, 版本号需要更新: BOOSTLIB = ['libboost_filesystem-vc142-mt-x64-1_77', 'libboost_thread-vc142-mt-x64-1_77']
XERCESLIB = ['xerces-c_4']我们用的是版本4
GLLIB: 将其中的glew32mx修改为glew32
PYTHON39LIB: 这里需要填入两项内容, 第一是boost的python库, 第二是python提供的库: PYTHON39LIB = ['boost_python39-vc142-mt-x64-1_77', 'C:/Program Files/Python39/libs/python39']
PYTHON39INCLUDE: 填入python提供的头文件目录: PYTHON39INCLUDE = ['C:/Program Files/Python39/include']
QTINCLUDE = ['C:/Qt/5.15.2/msvc2019_64/include']
QTDIR = 'C:/Qt/5.15.2/msvc2019_64'

SConscript

SConstruct中可能会用到has_key, 这是当前不支持的语法, 所以会发生报错:

AttributeError: 'SConsEnvironment' object has no attribute 'has_key':
 File "H:\mitsuba\SConstruct", line 34:
   build('src/libcore/SConscript')
 File "H:\mitsuba\SConstruct", line 28:
   return SConscript(scriptFile, exports,
 File "c:\users\****************************************************\SConscript.py", line 660:
   return method(*args, **kw)
 File "c:\users\****************************************************\SConscript.py", line 597:
   return _SConscript(self.fs, *files, **subst_kw)
 File "c:\users\****************************************************\SConscript.py", line 285:
   exec(compile(scriptdata, scriptname, 'exec'), call_stack[-1].globals)
 File "H:\mitsuba\src\libcore\SConscript", line 5:
   if coreEnv.has_key('OEXRLIBDIR'):

解决方法: 将has_key替换为in即可, 例如: coreEnv.has_key('OEXRLIBDIR')替换为'OEXRLIBDIR' in coreEnv
存在多个SConstruct文件, 这些文件都需要修改

`build/SConscript.configure`

34行的Python版本需要自行添加

python_versions = ["2.6", "2.7", "3.0", "3.1", "3.2", "3.3", "3.4", "3.5", "3.6", "3.7", "3.8", "3.9"] # 添加 "3.8", "3.9"

建议将检查Qt5的异常捕获关闭, 因为我们需要编译Gui

# Line 96
env = Environment(options=vars, ENV = os.environ, tools=['default', 'qt5'], toolpath=['#data/scons'])
print('Checking for Qt 5.x... yes')
hasQt = True
# try:
#         env = Environment(options=vars, ENV = os.environ, tools=['default', 'qt5'], toolpath=['#data/scons'])
#         print('Checking for Qt 5.x... yes')
#         hasQt = True
# except Exception:
#         env = Environment(options=vars, ENV = os.environ, tools=['default'], toolpath=['#data/scons'])
#         print('Unable to detect a Qt installation -- not building the GUI!')
#         hasQt = False

194行的OpenEXR检查需要更新路径, 不知道为什么使用"ImfRgba.h"始终返回False, 这里用'openexr.h'代替

if not conf.CheckCXXHeader('openexr.h'): # conf.CheckCXXHeader('ImfRgba.h'):
        print('OpenEXR is missing (install libopenexr-dev for OpenEXR I/O support)')
else:
        env.Append(CPPDEFINES = [['MTS_HAS_OPENEXR', 1]] )

`data/scons/qt5.py`

这是用来检查Qt5的, 但是SCons.Warnings.Warning会抛出异常, 所以需要这样修改:

# Line 47
# class ToolQtWarning(SCons.Warnings.Warning):
class ToolQtWarning():
        pass

class GeneratedMocFileNotIncluded(ToolQtWarning):
        pass

class QtdirNotFound(ToolQtWarning):
        pass

# SCons.Warnings.enableWarningClass(ToolQtWarning)

`build/SConscript.install`

这一部分需要修改的内容有点多, 不一一赘述. 但是修改的地方都会把原有内容注释掉
这部分主要负责将依赖拷贝至编译后的文件夹, 需要将依赖的版本, 路径等等写正确

if sys.platform == 'win32':
        for plugin in plugins:
                if '.dll' in plugin.__str__():
                        installTargets += env.Install(os.path.join(distDir, 'plugins'), plugin)

        boost_version = '1_77'
        compilerType = 'vc142' # 'vc141'
        archType = 'x64' if 'WIN64' in env['CXXFLAGS'] else 'i386'
        dllprefix = '#dependencies/bin' # '#dependencies/lib'

        if hasCollada:
                install(distDir, ['converter/mtsimport.exe'])
        sdkDir = os.path.join(distDir, "sdk")
        sdkLibDir = os.path.join(sdkDir, "lib")

        install(distDir, ['mitsuba/mitsuba.exe', 'mitsuba/mtssrv.exe', 'mitsuba/mtsutil.exe'])
        install(distDir, ['libcore/libmitsuba-core.dll', 'libhw/libmitsuba-hw.dll',
                        'librender/libmitsuba-render.dll', 'libbidir/libmitsuba-bidir.dll'])
        install(sdkLibDir, ['libcore/mitsuba-core.lib', 'libhw/mitsuba-hw.lib',
                        'librender/mitsuba-render.lib', 'libbidir/mitsuba-bidir.lib'])
        for entry in os.walk(os.path.join(basePath, "include")):
                includeDir = entry[0][len(basePath)+1:]
                installTargets += env.Install(os.path.join(sdkDir, includeDir),
                        [ ('#' + os.path.join(includeDir, fname)) for fname in entry[2] ])
        for ver in hasPython:
                installAs(os.path.join(distDir, 'python/'+ver+'/mitsuba.pyd'), 'libpython/mitsuba_python' + ver + '.dll')
        install(distDir, ['Iex-3_1.dll','IlmThread-3_1.dll', 'Imath-3_2.dll','OpenEXR-3_1.dll','zlib.dll',
                'libpng16.dll', 'jpeg62.dll', 'xerces-c_4_0.dll', 'glew32.dll', 'libfftw3-3.dll'],
                prefix=dllprefix)
        # install(distDir, ['Iex.dll', 'Half.dll','IlmThread.dll', 'Imath.dll','IlmImf.dll','zlib1.dll',
                # 'libpng16.dll', 'jpeg.dll', 'xerces-c_3_1.dll', 'glew32mx.dll', 'libfftw3-3.dll'],
                # prefix=dllprefix)
        for boostlib in ['python39', 'filesystem', 'chrono', 'thread']: # for boostlib in ['python27', 'python35', 'python36', 'system', 'filesystem', 'chrono', 'thread']:
            if 'WIN64' in env['CXXFLAGS']:
                install(distDir, ['boost_%s-%s-mt-x64-%s.dll' % (boostlib, compilerType, boost_version)], dllprefix)
            else:
                install(distDir, ['boost_%s-%s-mt-%s.dll' % (boostlib, compilerType, boost_version)], dllprefix) # install(distDir, ['boost_%s-%s-mt-1_64.dll' % (boostlib, compilerType)], dllprefix)

        installTargets += env.Install(distDir, '#data/windows/README.txt')

        if hasQt:
                install(distDir, ['mtsgui/mtsgui.exe'])
                install(distDir, ['Qt5Core.dll', 'Qt5Gui.dll', 'Qt5Widgets.dll', 'Qt5Xml.dll',
                        'Qt5Network.dll', 'Qt5OpenGL.dll', 'Qt5XmlPatterns.dll'], prefix = env['QT5_BINPATH'])# env['QT5_LIBPATH'])
                QT5_PLUGIN_PATH = os.path.join(os.path.join('$QTDIR', 'plugins'), 'platforms')
                DIST_PLUGIN_PATH = os.path.join(os.path.join(distDir, 'plugins'), 'platforms')
                install(DIST_PLUGIN_PATH, ['qdirect2d.dll', 'qdirect2dd.dll',
                        'qminimal.dll', 'qminimald.dll', 'qoffscreen.dll', 'qoffscreend.dll',
                        'qwindows.dll', 'qwindowsd.dll'], prefix=QT5_PLUGIN_PATH)

`dependencies/version`

Mitsuba在编译的时候需要检查dependencies/version这个文件
在dependencies文件夹下新建一个文本文件, 取名verison, 写入内容0.6.0
或者直接参考"依赖列表"部分, 从github上下载

编译Mitsuba源码

编译时请在 64 位的 VS Command Prompt 下进行操作
编译的步骤很简单, 直接在项目根目录下运行scons即可
编译时还会遇到编译/链接错误, 下面记录了个人遇到的错误, 发生的原因以及修改办法

编译错误

如果你使用的是我的Github上修改的版本, 那么可以跳过这部分
编译时遇到的问题也许能够在这里找到答案
依赖更新后还需要对Mitsuba的源码做一些修改, 以适应新的版本, 下面是修改的记录(可能不全, 但是基本的Error都已经记录了下来, 并且说明了怎么进行修改)
建议使用VSCode进行内容查找

`src\libcore\bitmap.cpp(100): error C2039: 'Int64': is not a member of 'Imf'`

cl /Fobuild\release\libcore\bitmap.obj /c src\libcore\bitmap.cpp /nologo /Oi /Ot /Oy /Ob1 /Gs /GF /Gy /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 NDEBUG /D OPENEXR_DLL /openmp /nologo /DMTS_BUILD_MODULE=MTS_MODULE_CORE /DMTS_HAS_LIBPNG=1 /DMTS_HAS_LIBJPEG=1 /DMTS_HAS_OPENEXR=1 /DMTS_HAS_FFTW=1 /Idependencies\include\OpenEXR /Idependencies\include\Imath /Idependencies\include\OpenEXR /Idependencies\include\Imath /Idependencies\include\boost-1_77 /Iinclude /Idependencies\include
bitmap.cpp
src\libcore\bitmap.cpp(100): error C2039: 'Int64': is not a member of 'Imf'
src\libcore\bitmap.cpp(100): error C3646: 'tellg': unknown override specifier
src\libcore\bitmap.cpp(100): error C2059: syntax error: '('
src\libcore\bitmap.cpp(100): error C2334: unexpected token(s) preceding '{'; skipping apparent function body
src\libcore\bitmap.cpp(104): error C2039: 'Int64': is not a member of 'Imf'
src\libcore\bitmap.cpp(104): error C2061: syntax error: identifier 'Int64'
src\libcore\bitmap.cpp(105): error C2065: 'pos': undeclared identifier
src\libcore\bitmap.cpp(124): error C2039: 'Int64': is not a member of 'Imf'
src\libcore\bitmap.cpp(124): error C3646: 'tellp': unknown override specifier
src\libcore\bitmap.cpp(124): error C2059: syntax error: '('
src\libcore\bitmap.cpp(124): error C2334: unexpected token(s) preceding '{'; skipping apparent function body
src\libcore\bitmap.cpp(128): error C2039: 'Int64': is not a member of 'Imf'
src\libcore\bitmap.cpp(128): error C2061: syntax error: identifier 'Int64'
src\libcore\bitmap.cpp(129): error C2065: 'pos': undeclared identifier
src\libcore\bitmap.cpp(2781): error C2259: 'mitsuba::EXRIStream': cannot instantiate abstract class
src\libcore\bitmap.cpp(2781): error C2259: 'mitsuba::EXRIStream': cannot instantiate abstract class

原因: OpenEXR更新后, 原有的Imf::Int64被替换为C++自带的64位整数int64_t或者uint64_t, 这里需要将报错的地方进行相应的替换. 另外, 替换的时候注意要根据父类的函数返回值和参数类型来替换

uint64_t tellg() { // Imf::Int64 tellg() { // Line 100
void seekg(uint64_t pos) { // void seekg(Imf::Int64 pos) { // Line 104
uint64_t tellp() { // Imf::Int64 tellp() { // Line 124
void seekp(uint64_t pos) { // void seekp(Imf::Int64 pos) { // Line 128

Imf_3_1::FrameBuffer

src\libcore\bitmap.cpp(3013): error C2079: 'frameBuffer' uses undefined class 'Imf_3_1::FrameBuffer'

src\libcore\bitmap.cpp(3013): error C2079: 'frameBuffer' uses undefined class 'Imf_3_1::FrameBuffer'
src\libcore\bitmap.cpp(3025): error C2039: 'Slice': is not a member of 'Imf'
src\libcore\bitmap.cpp(3025): error C3861: 'Slice': identifier not found
src\libcore\bitmap.cpp(3033): error C2039: 'Slice': is not a member of 'Imf'
src\libcore\bitmap.cpp(3033): error C3861: 'Slice': identifier not found
src\libcore\bitmap.cpp(3042): error C2664: 'void Imf_3_1::InputFile::setFrameBuffer(const Imf_3_1::FrameBuffer &)': cannot convert argument 1 from 'int' to 'const Imf_3_1::FrameBuffer &'
src\libcore\bitmap.cpp(3298): error C2079: 'frameBuffer' uses undefined class 'Imf_3_1::FrameBuffer'
src\libcore\bitmap.cpp(3302): error C2039: 'Slice': is not a member of 'Imf'
src\libcore\bitmap.cpp(3302): error C3861: 'Slice': identifier not found
src\libcore\bitmap.cpp(3306): error C2039: 'Slice': is not a member of 'Imf'
src\libcore\bitmap.cpp(3306): error C3861: 'Slice': identifier not found
src\libcore\bitmap.cpp(3308): error C2039: 'Slice': is not a member of 'Imf'
src\libcore\bitmap.cpp(3308): error C3861: 'Slice': identifier not found
src\libcore\bitmap.cpp(3309): error C2039: 'Slice': is not a member of 'Imf'
src\libcore\bitmap.cpp(3309): error C3861: 'Slice': identifier not found
src\libcore\bitmap.cpp(3310): error C2039: 'Slice': is not a member of 'Imf'
src\libcore\bitmap.cpp(3310): error C3861: 'Slice': identifier not found
src\libcore\bitmap.cpp(3315): error C2039: 'Slice': is not a member of 'Imf'
src\libcore\bitmap.cpp(3315): error C3861: 'Slice': identifier not found
src\libcore\bitmap.cpp(3319): error C2039: 'Slice': is not a member of 'Imf'
src\libcore\bitmap.cpp(3319): error C3861: 'Slice': identifier not found
src\libcore\bitmap.cpp(3326): error C2039: 'Slice': is not a member of 'Imf'
src\libcore\bitmap.cpp(3326): error C3861: 'Slice': identifier not found
src\libcore\bitmap.cpp(3330): error C2664: 'void Imf_3_1::OutputFile::setFrameBuffer(const Imf_3_1::FrameBuffer &)': cannot convert argument 1 from 'int' to 'const Imf_3_1::FrameBuffer &'

include文件没有加上, 在include/mitsuba/core/half.h中, #include<half.h>后面加上#include <ImfFrameBuffer.h>即可

unresolved externals imath_half_to_float_table

build\release\libcore\libmitsuba-core.dll : fatal error LNK1120: 1 unresolved externals imath_half_to_float_table
应该是有个依赖库没有链接上, 但是OpenEXR 3.1开始支持了基于位运算的half精度, 所以直接在include/mitsuba/core/half.h中, #include<half.h>前面加一个宏#define IMATH_HALF_NO_LOOKUP_TABLE就可以了

‘_vsnprintf’: is not a member of ‘std’

cl /Fobuild\release\libcore\thread.obj /c src\libcore\thread.cpp /nologo /Oi /Ot /Oy /Ob1 /Gs /GF /Gy /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 NDEBUG /D OPENEXR_DLL /openmp /nologo /DMTS_BUILD_MODULE=MTS_MODULE_CORE /DMTS_HAS_LIBPNG=1 /DMTS_HAS_LIBJPEG=1 /Idependencies\include\openexr /Idependencies\include\openexr /Idependencies\include\boost-1_77 /Iinclude /Idependencies\include
thread.cpp
dependencies\include\boost-1_77\boost/system/detail/snprintf.hpp(57): error C2039: '_vsnprintf': is not a member of 'std'

原因: Mitsuba中platform.h将vsnprintf进行了宏替换, 新版本的boost/MSVC已经不需要这样做了, 这里将用宏定义#if (defined(_MSC_VER) && _MSC_VER < 1900)把替换的内容注释掉.

// include/mitsuba/core/platform.h, Line 215
#if (defined(_MSC_VER) && _MSC_VER < 1900)
#define snprintf _snprintf
#define vsnprintf _vsnprintf
#endif

`SAXParser`相关语法错误

情况1: 命名空间相关错误

   util.cpp
   include\mitsuba/render/scenehandler.h(33): error C2144: syntax error: 'SAXParser' should be preceded by ';'
   include\mitsuba/render/scenehandler.h(33): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
   include\mitsuba/render/scenehandler.h(37): error C2143: syntax error: missing ';' before 'namespace'
   include\mitsuba/render/scenehandler.h(37): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
   include\mitsuba/render/scenehandler.h(170): error C2039: 'XMLTranscoder': is not a member of 'xercesc_4_0'

原因: xerces-c 4移除了一部分namespace相关宏定义, 需要手动将宏定义进行替换. 下面是需要替换的宏, 注意可能需要替换多个文件

   #define XERCES_CPP_NAMESPACE_BEGIN namespace XERCES_CPP_NAMESPACE {
   #define XERCES_CPP_NAMESPACE_END  }
   #define XERCES_CPP_NAMESPACE_USE using namespace XERCES_CPP_NAMESPACE;
   #define XERCES_CPP_NAMESPACE_QUALIFIER XERCES_CPP_NAMESPACE::

情况2: 字符串指针问题

src\librender\scenehandler.cpp(667): error C2664: 'void xercesc_4_0::SAXParser::setExternalNoNamespaceSchemaLocation(const XMLCh *const )': cannot convert argument 1 from 'const boost::filesystem::path::value_type *' to 'const XMLCh *const '

原因: boost更新后, filesystem中的路径转字符串指针时, 需要首先转为string, 在转为字符串指针. 即将代码中 fs::path::c_str() 替换为 fs::path::string()::c_str(). 这里会涉及多个文件, 需要在编译的时候再检查替换

incomplete type ‘GLEWContextStruct’

include\mitsuba/core/tls.h(145): warning C4150: deletion of pointer to incomplete type 'GLEWContextStruct'; no destructor called

glrenderer.cpp
include\mitsuba/core/tls.h(145): warning C4150: deletion of pointer to incomplete type 'GLEWContextStruct'; no destructor called
include\mitsuba/hw/glrenderer.h(25): note: see declaration of 'GLEWContextStruct'
include\mitsuba/core/tls.h(143): note: while compiling class template member function 'void mitsuba::PrimitiveThreadLocal<GLEWContextStruct>::destruct(void *)'
include\mitsuba/core/tls.h(118): note: see reference to function template instantiation 'void mitsuba::PrimitiveThreadLocal<GLEWContextStruct>::destruct(void *)' being compiled
src\libhw\glrenderer.cpp(33): note: see reference to class template instantiation 'mitsuba::PrimitiveThreadLocal<GLEWContextStruct>' being compiled
include\mitsuba/core/tls.h(140): error C2027: use of undefined type 'GLEWContextStruct'
include\mitsuba/hw/glrenderer.h(25): note: see declaration of 'GLEWContextStruct'
include\mitsuba/core/tls.h(139): note: while compiling class template member function 'void *mitsuba::PrimitiveThreadLocal<GLEWContextStruct>::construct(void)'
include\mitsuba/core/tls.h(118): note: see reference to function template instantiation 'void *mitsuba::PrimitiveThreadLocal<GLEWContextStruct>::construct(void)' being compiled
scons: *** [build\release\libhw\glrenderer.obj] Error 2
scons: building terminated because of errors.

原因: 新版本的glew没有GLEWContextStruct这一结构体了, 直接注释GLEWContextStruct相关的代码即可.

`_1`相关问题

   volcache.cpp
   src\volume\volcache.cpp(180): error C2065: '_1': undeclared identifier
   src\volume\volcache.cpp(181): error C2065: '_1': undeclared identifier
   src\volume\volcache.cpp(179): error C2664: 'mitsuba::LRUCache<mitsuba::Vector3i,mitsuba::Vector3iKeyOrder,float *>::LRUCache(const mitsuba::LRUCache<mitsuba::Vector3i,mitsuba::Vector3iKeyOrder,float *> &)': cannot convert argument 1 from 'const size_t' to 'const mitsuba::LRUCache<mitsuba::Vector3i,mitsuba::Vector3iKeyOrder,float *> &'
   src\volume\volcache.cpp(181): note: Reason: cannot convert from 'const size_t' to 'const mitsuba::LRUCache<mitsuba::Vector3i,mitsuba::Vector3iKeyOrder,float *>'
   src\volume\volcache.cpp(181): note: No constructor could take the source type, or constructor overload resolution was ambiguous
   include\mitsuba/core/lrucache.h(153): note: see declaration of 'mitsuba::LRUCache<mitsuba::Vector3i,mitsuba::Vector3iKeyOrder,float *>::LRUCache'

将_1修改为std::placehodlers::_1即可, 但需要修改多个地方

链接错误

OpenEXR

LINK: fatal error LNK1181: cannot open input file IlmImf.lib/lmThreadlib/Iex.lib
原因: OpenEXR已经更名为libOpenEXR, 在config.py中将OEXRLIB修改为: OEXRLIB = ['OpenEXR-3_1', 'IlmThread-3_1', 'Iex-3_1', 'zlib']