ios - 初学者在iOS中使用assimp

Question

我想在即将到来的ios项目中使用Assimp，但很难使它正常工作。我遵循了以下指示:

How to build ASSIMP Library for iOS (Device and Simulator) with boost-library?

但是终端不断告诉我:

rm: CMakeCache.txt: No such file or directory
/Users/hengchinsoon/Desktop/assimp/port/iOS/build_ios.sh: line 40: cmake: command not found
Building armv6 library
make: *** No rule to make target `clean'.  Stop.
make: *** No rule to make target `assimp'.  Stop.
cp: ./lib/libassimp.a: No such file or directory
rm: CMakeCache.txt: No such file or directory
/Users/hengchinsoon/Desktop/assimp/port/iOS/build_ios.sh: line 51: cmake: command not found
Building armv7 library
make: *** No rule to make target `clean'.  Stop.
make: *** No rule to make target `assimp'.  Stop.
cp: ./lib/libassimp.a: No such file or directory
rm: CMakeCache.txt: No such file or directory
/Users/hengchinsoon/Desktop/assimp/port/iOS/build_ios.sh: line 62: cmake: command not found
Building i386 library
make: *** No rule to make target `clean'.  Stop.
make: *** No rule to make target `assimp'.  Stop.
cp: ./lib/libassimp.a: No such file or directory
rm: ./lib/libassimp.a: No such file or directory

因此，我检查了assimp根文件夹，发现没有任何lib文件夹(来自github描述，用于Windows)。因此，我刚刚制作了lib文件夹，然后重试。但仍然无法正常工作。

谁能和我分享我做错了哪些部分？谢谢!

说如果我成功安装了需要安装的所有内容，那么如何真正使用该库？
我应该将lib / ios /文件夹复制到ios项目中吗？

我想做的是导入一些.blend文件，然后我可以对着色器和其他很棒的东西进行实验。

我是一位不错的ios开发人员，并且对OpenGL ES有基本的了解。不知何故，Assimp文档使我对其功能感到困惑。我不确定在核心概念级别还是在编程级别不了解Assimp。但是我仍然坚信它非常灵活和强大。

感谢您的帮助。

Answer 1

我猜您正在使用“buil_ios.sh”脚本，在该脚本中有一些错误。

您应该先从Cmake Download下载Cmake。

安装Cmake，然后执行以下操作。

首先，我认为除了输出之外，您还会收到一些消息，告诉您在Cmake中放置的某些选项未被使用。那是因为在脚本中某些变量的名称写得不好。

除此之外，您还应该更改CMakeLists.txt文件，以便在尝试构建库时不会出现错误:

在此定义所需的参数

设置(ASSIMP_SV_REVISION 1023)<-应该小于1024。

设置(ASSIMP_VERSION $ {ASSIMP_VERSION_MAJOR})<-在这里，您会找到一些类似的参数。 (参数0)。(参数1)...
Mac OS不喜欢使用以下命名法来放置名称:parameter0.parameter1.paramter.2.a我想这是因为'。'。

因此，经过漫长的一天，我终于设法建立了图书馆。另一个选择是从项目openframeworks编译库，其路径为:“/ addons / ofxAssimpModelLoader / libs / assimp / lib / ios / assimp.a”

Here you have a link to the library

在这里，您可以找到已经为arm6 arm7和i386体系结构编译的库。

我将把修改后的脚本放到这里。

#!/bin/sh
# build.sh

#######################
# BUILD ASSIMP for iOS and iOS Simulator
#######################

BUILD_DIR="./lib/ios"

IOS_BASE_SDK="5.0"
IOS_DEPLOY_TGT="3.2"

setenv_all()
{
    # Add internal libs
    export CFLAGS="$CFLAGS"
    export CPP="$DEVROOT/usr/bin/llvm-cpp-4.2"
    export CXX="$DEVROOT/usr/bin/llvm-g++-4.2"
    export CXXCPP="$DEVROOT/usr/bin/llvm-cpp-4.2"
    export CC="$DEVROOT/usr/bin/llvm-gcc-4.2"
    export LD=$DEVROOT/usr/bin/ld
    export AR=$DEVROOT/usr/bin/ar
    export AS=$DEVROOT/usr/bin/as
    export NM=$DEVROOT/usr/bin/nm
    export RANLIB=$DEVROOT/usr/bin/ranlib
    export LDFLAGS="-L$SDKROOT/usr/lib/"

    export CPPFLAGS=$CFLAGS
    export CXXFLAGS=$CFLAGS
}

setenv_arm6()
{
    unset DEVROOT SDKROOT CFLAGS CC LD CPP CXX AR AS NM CXXCPP RANLIB LDFLAGS CPPFLAGS CXXFLAGS
    export DEVROOT=/Developer/Platforms/iPhoneOS.platform/Developer
    export SDKROOT=$DEVROOT/SDKs/iPhoneOS$IOS_BASE_SDK.sdk
    export CFLAGS="-arch armv6 -pipe -no-cpp-precomp -isysroot $SDKROOT -miphoneos-version-min=$IOS_DEPLOY_TGT -I$SDKROOT/usr/include/"
    setenv_all
    rm CMakeCache.txt
    cmake  -G 'Unix Makefiles' -DCMAKE_TOOLCHAIN_FILE=./port/iOS/IPHONEOS_ARM6_TOOLCHAIN.cmake -DENABLE_BOOST_WORKAROUND=ON -DBUILD_STATIC_LIB=ON -DASSIMP_BUILD_STATIC_LIB=ON
}

setenv_arm7()
{
    unset DEVROOT SDKROOT CFLAGS CC LD CPP CXX AR AS NM CXXCPP RANLIB LDFLAGS CPPFLAGS CXXFLAGS
    export DEVROOT=/Developer/Platforms/iPhoneOS.platform/Developer
    export SDKROOT=$DEVROOT/SDKs/iPhoneOS$IOS_BASE_SDK.sdk
    export CFLAGS="-arch armv7 -pipe -no-cpp-precomp -isysroot $SDKROOT -miphoneos-version-min=$IOS_DEPLOY_TGT -I$SDKROOT/usr/include/"
    setenv_all
    rm CMakeCache.txt
    cmake  -G 'Unix Makefiles' -DCMAKE_TOOLCHAIN_FILE=./port/iOS/IPHONEOS_ARM7_TOOLCHAIN.cmake -DENABLE_BOOST_WORKAROUND=ON -DBUILD_STATIC_LIB=ON -DASSIMP_BUILD_STATIC_LIB=ON
}

setenv_i386()
{
    unset DEVROOT SDKROOT CFLAGS CC LD CPP CXX AR AS NM CXXCPP RANLIB LDFLAGS CPPFLAGS CXXFLAGS
    export DEVROOT=/Developer/Platforms/iPhoneSimulator.platform/Developer
    export SDKROOT=$DEVROOT/SDKs/iPhoneSimulator$IOS_BASE_SDK.sdk
    export CFLAGS="-arch i386 -pipe -no-cpp-precomp -isysroot $SDKROOT -miphoneos-version-min=$IOS_DEPLOY_TGT"
    setenv_all
    rm CMakeCache.txt
    cmake  -G 'Unix Makefiles' -DCMAKE_TOOLCHAIN_FILE=./port/iOS/IPHONEOS_i386_TOOLCHAIN.cmake -DENABLE_BOOST_WORKAROUND=ON -DBUILD_STATIC_LIB=ON -DASSIMP_BUILD_STATIC_LIB=ON
}

create_outdir()
{
    for lib_i386 in `find $BUILD_DIR/i386 -name "lib*\.a"`; do
        lib_arm6=`echo $lib_i386 | sed "s/i386/arm6/g"`
        lib_arm7=`echo $lib_i386 | sed "s/i386/arm7/g"`
        lib=`echo $lib_i386 | sed "s/i386\///g"`
        echo 'Creating fat binary...'
        lipo -arch armv6 $lib_arm6 -arch armv7 $lib_arm7 -arch i386 $lib_i386 -create -output $lib
    done
    echo 'Done! You will find the libaries and fat binary library in /lib/ios'
}
cd ../../

rm -rf $BUILD_DIR
mkdir -p $BUILD_DIR/arm6 $BUILD_DIR/arm7 $BUILD_DIR/i386

setenv_arm6
echo 'Building armv6 library'
make clean
make assimp -j 8 -l
cp ./lib/libassimp.a $BUILD_DIR/arm6/

setenv_arm7
echo 'Building armv7 library'
make clean
make assimp -j 8 -l
cp ./lib/libassimp.a $BUILD_DIR/arm7/


setenv_i386
echo 'Building i386 library'
make clean
make assimp -j 8 -l
cp ./lib/libassimp.a $BUILD_DIR/i386/

rm ./lib/libassimp.a

create_outdir