Lab 0 - Setting up the development environment

IMPORTANT! In this course, your project must be cross-platform. Follow these guidelines.

Do not use system-specific headers and libraries (e.g., windows.h).
In your code, use forward slashes instead of back slashes for paths (/ instead of \).
When adding new cpp and h files, always add them manually to the src folder and rerun CMake. Do not use the “add” feature of your IDE to add files to your project.
Always use CMake to perform an “out-of-source” build, which means that the binary files will not be in the same directory as the source files.

Once you set up your environment properly, you should be able to run the lab code and see a teapot.

First, download the lab here, and then extract the zip file to a suitable folder. Then go to the section corresponding to your development environment.

Windows
- Install prerequisite software on Windows
- Option A: Run the lab with Visual Studio
- Option B: Run the lab with Makefile
macOS
- Install prerequisite software on macOS
- Option A: Run the lab with Xcode
- Option B: Run the lab with Makefile
Linux
- Install prerequisite software on Linux
- Run the lab with Makefile

Miscellaneous tips:

Depending on the environment, things may not go smoothly if the path contains special characters. Therefore, I recommend against using SPACE, &, etc. in your path.
Whenever you change your environment variables, you need to restart CMake and your IDE.
Because CMake caches your last-used settings, it must be cleared before running again. Run the command rm -r * from the build folder to delete the cache.

Setting up Windows

Download and install these programs.
- Visual Studio (https://www.visualstudio.com/downloads/). Any recent version should work.
  - Make sure to download Visual C++, not just Visual Studio.
  - You may have to run Visual C++ at least once, before running CMake.
  - Some people have reported that they needed to also install “Build Tools For Visual Studio,” under “Other Tools and Frameworks” on the visual studio download page.
- CMake (https://cmake.org/download/): get the Windows Installer.
Download and extract the following libraries. You can extract them to your CSCE441 folder or to a system folder of your choice.
- GLM (http://glm.g-truc.net): get the source code.
- GLFW (http://www.glfw.org): get the source code.
- GLEW (http://glew.sourceforge.net): get the Windows binaries.
Set up the environment variables. This ensures that your code will work on the TA’s and the instructor’s machines.
- Search for “environment” and then select “Edit environment variables for your account.”
- In the dialog box, set the following environment variables. Each of the /path/to/* should point to the absolute path of the libraries that you just installed. These directories should be the “root” directories of the libraries – i.e., they should contain such items as include/, src/, doc/, lib/, readme, etc.
  - Set GLM_INCLUDE_DIR to /path/to/GLM
  - Set GLFW_DIR to /path/to/GLFW
  - Set GLEW_DIR to /path/to/GLEW
- To test your environment variables, open a PowerShell and run the following:
```
  > $env:GLM_INCLUDE_DIR
  > $env:GLFW_DIR
  > $env:GLEW_DIR
```
  Make sure you see the correct paths in the output.

Setting up macOS

This is for macOS Catalina. Earlier versions may or may not work.

Download and install the following. You can use homebrew/macports or install these manually.
- Xcode developer tools. You’ll need to log in with your Apple ID.
  - You may have to run Xcode at least once, before running CMake.
- CMake (http://cmake.org/download/). Once installed, run the application and follow one of the three options listed under “Tools -> How to Install for Command Line Use”.
Make sure the commands g++ and cmake work from the command prompt.
Download and extract the following libraries. You can extract them to your CSCE441 folder or to a system folder of your choice.
- GLM (http://glm.g-truc.net): get the source code.
- GLFW (http://www.glfw.org): get the source code.
- GLEW (http://glew.sourceforge.net): get the source code.
  - Compile the source by typing make -j4. (This could take a while.)
Set up the environment variables. This ensures that your code will work on the TA’s and the instructor’s machines.
- Add the following lines to your “run commands” file (zshrc or bashrc).
```
  export GLM_INCLUDE_DIR=ABS_PATH_TO_GLM
  export GLFW_DIR=ABS_PATH_TO_GLFW
  export GLEW_DIR=ABS_PATH_TO_GLEW
```
  If you are using zsh (Catalina default), then add the lines above to ~/.zshrc. If you are using bash, then add the lines above to ~/.bash_profile (or ~/.bashrc if .bash_profile doesn’t exist). To find out which shell you are using, run the command echo $SHELL from the command prompt.
  
  Set these variables to point to the directories that you extracted GLM, GLFW, and GLEW to. These directories should be the “root” directories of the libraries – i.e., they should contain such items as include/, src/, doc/, lib/, readme, etc. For example, on my machine, ABS_PATH_TO_GLM is /Users/sueda/lib/glm-0.9.9.6.
- These environment variables will be set the next time you login. To make this change take effect in your current terminal, run the following
```
  > source ~/.zshrc    # if you're using zsh
  > source ~/.bashrc   # if you're using bash
```
- To test your environment variables, run the following in the terminal:
```
  > echo $GLM_INCLUDE_DIR
  > echo $GLFW_DIR
  > echo $GLEW_DIR
```
  Make sure you see the correct paths in the output.

Setting up Linux

This is for Ubuntu Linux 16.04.1 LTS. Setting up other distributions will be similar but may be slightly different.

You’ll need the following if you don’t have them already.

 > sudo apt-get update
 > sudo apt-get install g++
 > sudo apt-get install cmake
 > sudo apt-get install freeglut3-dev
 > sudo apt-get install libxrandr-dev
 > sudo apt-get install libxinerama-dev
 > sudo apt-get install libxcursor-dev

We are going to install GLM, GLFW, and GLEW manually. (You may also use a package manager to get these libraries, but please do not modify the CMake file.)

Download and extract the following libraries. You can extract them to your CSCE441 folder or to a system folder of your choice.
- GLM (http://glm.g-truc.net): get the source code.
- GLFW (http://www.glfw.org): get the source code.
- GLEW (http://glew.sourceforge.net): get the source code.
  - Compile the source by typing make -j4. (This could take a while.)
Set up the environment variables. This ensures that your code will work on the TA’s and the instructor’s machines.
- In ~/.profile, add the following lines.
```
  export GLM_INCLUDE_DIR=ABS_PATH_TO_GLM
  export GLFW_DIR=ABS_PATH_TO_GLFW
  export GLEW_DIR=ABS_PATH_TO_GLEW
```
  Set these variables to point to the directories that you extracted GLM, GLFW, and GLEW to. These directories should be the “root” directories of the libraries – i.e., they should contain such items as include/, src/, doc/, lib/, readme, etc.
- These environment variables will be set the next time you login. To make this change take effect in your current terminal, run the following
```
  > source ~/.profile
```
- To test your environment variables, run the following in the terminal:
```
  > echo $GLM_INCLUDE_DIR
  > echo $GLFW_DIR
  > echo $GLEW_DIR
```
  Make sure you see the correct paths in the output.

Run with Visual Studio

Extract L00.zip into a folder of your choice.
Run CMake (GUI).
1. Click on “Browse Source…” and point to the folder you extracted, containing the CMakeLists.txt file.
2. Copy and paste the path from above to “Where to build the binaries.” Append “build” to it.
3. Click on “Configure.” Click on “Yes” if it asks if you want to create a directory. Select the Visual Studio version that is installed on your machine (e.g., “Visual Studio 16.2.5 2019”) and click on “Finish.” You should see “Configuring done” in the scroll panel.
4. Click on “Generate.” You should see “Generating done” in the scroll panel. Close CMake.
There should now be a file called L00.sln in the build folder. Double click it to open it with Visual Studio.
1. Right-click on L00 and select “Set as StartUp Project.”
2. Right-click again on L00 and select “Properties.” Go to “Debugging” then “Command Arguments” and then type ../resources. Click “OK.”
3. Go to the “Build” menu and click “Build Solution [F7].”
4. Go to the “Debug” menu and click “Start Debugging [F5].” You should see the teapot.
5. To run in Release mode, change the solution configuration by clicking on “Debug” in the drop-down menu.

Run with Xcode

Extract L00.zip into a folder of your choice.
In the folder that contains CMakeLists.txt, run the following.
```
 > mkdir build
 > cd build
```
Then run the following from the build folder.
```
 > cmake -G Xcode ..
```
This will generate L00.xcodeproj project that you can open with Xcode.
Open L00.xcodeproj with Xcode.
1. Change the target by clicking on “ALL_BUILD” and selecting L00.
2. Edit the scheme by going to “Product” -> “Scheme” -> “Edit Scheme” to add command-line arguments (../../resources).
3. Press Command+B to build.
4. Press Command+R to run.
5. To run in release mode, edit the scheme again and go to the “info” tab.

Run with Makefile

Extract L00.zip into a folder of your choice.
In the folder that contains CMakeLists.txt, run the following.
```
 > mkdir build
 > cd build
```
Then run the following from the build folder.
```
 > cmake ..
```
This will generate a Makefile that you can use to compile your code.
To compile the code, run the generated Makefile.
```
 > make -j4
```
The -j argument speeds up the compilation by multithreading the compiler. This will generate an executable, which you can run by typing
```
 > ./L00 ../resources
```
To build in release mode, use ccmake .. and change CMAKE_BUILD_TYPE to Release. Press ‘c’ to configure then ‘g’ to generate. Now make -j4 will build in release mode.

Generated on Sun Aug 16 14:57:31 CDT 2020