Linux - ubuntu

1. gcc/g++-4.8 & ubuntu 14.04 failed
2. gcc/g++-5.4 & ubuntu 14.04 passed
3. gcc/g++-6.2 & ubuntu 14.04 passed
4. gcc/g++-default & ubuntu 16.04 passed
5. gcc/g++-5.4 & linux-mint 18.2 passed
6. gcc/g++-6.3 & linux-mint 18.2 passed

Commands for checking and switching your gcc version:

$ ls -l $(which gcc)

If you have multiple gcc version, then use following commands to switch to the version that we have successfully tested:

$ sudo ln -sf (gcc version) /usr/bin/gcc

For example:

$ sudo ln -sf gcc-5 /usr/bin/gcc

Also, check if your g++ is installed as well and switch to the version:

$ sudo ln -sf (g++ version) /usr/bin/g++

Example:

$ sudo ln -sf g++-5 /usr/bin/g++

Gnerally, we include the pre-compiled Linux libraries for users, but if they do now work well on your side, we encourage you compiling one for yourself. They all have clear documents to guide you get the work done.

• OpenEXR (Including ILMBase)
      Checkout here for downloading OpenEXR & ILMBase. For "How to correctly install" please refer to the link here We start with building and installing ILMBase first:

  • Extract the ilmbase-2.2.0.tar.gz under VFXEPOCH/external_libs/ILM/ by following commands:

   $ tar -xvf ilmbase-2.2.0.tar.gz

  to current directory. Then you should get an folder with the same name: ilmbase-2.2.0. Now let's dive into to the extracted folder and make a directory called "build", the hierarchy should look like: ilmbase-2.2.0/build . Dive into the "build" folder and type cmake .. . Check the options and installing target path as you wish. Then type make -j 8. The option "-j 8" is for 8 threads accelerating compiling process. If you have 12 threads 22 threads (Intel xeon E5 maybe?), change it to "-j 12" or "-j 22". Finally type make install to copy files into the specified location.
      Next step is to install OpenEXR. Please note that, installing OpenEXR would rely on ilmbase library from above we addressed, so don't skip it.
      Here if you simply follow the steps like we did for ilmbase, probably you will get an error said it cannot find half.h. Just for simplifying the step, let's put two more lines in the CMakeLists.txt of OpenEXR (openexr-2.2.0, of course extract like above first!). Using any text editor you like to open CMakeLists.txt. Then add the path of ilmbase header files and libs, for my case, it's:

   INCLUDE_DIRECTORIES (
   		  ${CMAKE_CURRENT_BINARY_DIR}/config
   		  /usr/local/include/OpenEXR/
   		  IlmImf
   		  IlmImfUtil
   		  exrmaketiled
   		  exrenvmap
   		  exrmakepreview
   		  exrmultiview
   		  IlmImfFuzzTest
   )
  
   LINK_DIRECTORIES ( ${ILMBASE_PACKAGE_PREFIX}/lib /usr/local/lib/ )

  
      We do this because we didn't change any options for the installing of ilmbase, if you are aware of this already, you could definitely fix it before just simply specifying the options for ilmbase CMakeLists.txt. Anyway, it should not be an annoy step, try more goolge!

• Alembic
      Checkout here for downloading and here for how to build it from scratch. Don't forget to install into your local path:

$ sudo make install

• Eigen
      Checkout here for downloading the library. Note that this library only has header files so there is no need to build.

    Additionally, we grab Robert Bridson's Pre-Conditioned Conjugate Gradient (PCG) solver during fluid simulation for pressure solve step. The code has been wrapped up into a specific folder called "/source/util/PCGSolver".

1. Except for VFXEPOCH libraries, examples requires only OpenGL GLUT to be installed. Following the link here to test your OpenGL GLUT.
2. Go to the root directory of VFXEPOCH folder. Open the CMakeLists.txt, find the line: option(VFXEPOCH_EXAMPLES "Turn ON to build example projects" OFF) to check and to make sure the option has been turned off for the very first time compiling the VFXEPOCH library.
3. You should find a script files called "cleanup.sh" & "setup.sh". Firstly, try "cleanup.sh" to make it naked and ready to build. Then use the bash "setup.sh" to setup and build the projects. Go to the root directory of VFXEPOCH project folder, and following are the scripts to execute "cleanup.sh" & "setup.sh".

$ ./cleanup.sh && ./setup.sh

When it's done, you should see an examples folder under the build directory. Go into it and have fun!

1. Smoke
   Launch the program by all default settings or provide arguments as:

$ ./program resolutionX(int) resolutionY(int) total_frames(int) window_width(int) window_height(int)
$ ./program resolutionX(int) resolutionY(int) total_frames(int)
$  Example Below
$ ./smoke 64 64 240 720 720