How to Build UFO‐Cells (Linux) - UbuntuJackson/UFO-Cells GitHub Wiki

Dependencies

UFO-Cells does under the hood use a graphics toolkit called PixelGameEngine. PixelGameEngine depends on OpenGL. On Windows those dependencies are already installed by the drivers, but on Linux there are a few additional things you need to install.

install libopengl-dev
install libglx-dev
install libpng-dev
install libx11-dev
install libthread-pool-dev?
Do you need libopenal-dev?

Structure

A typical UFO-Cells project ought to look like this.\n

root
 |_/build
 |_/external/UFO-Cells
 |_/res
 |_/src
 |_CMakeLists.txt

Example Project

Thus you need to create a folder called "build", "external", "res", "external" and then a "CMakeLists.txt" file.

Open /root in terminal.

cd external.

git clone https://github.com/UbuntuJackson/UFO-Cells.git

Make an example Project. Make a main.cpp file with the following code.

#include <ufo/game.h>
#include <ufo/console.h>
#include <ufo/ray2.h>
#include <olcPixelGameEngine.h>

class PGE_Derived : public Game{
public:

    Ray2 ray{olc::vf2d(10.0f*6.0f, 10.0f*6.0f), olc::vf2d(10.0f*10.0f, 10.0f*10.0f)};
    Ray2 other_ray{olc::vf2d(60.0f, 20.0f), olc::vf2d(10.0f*2.0f, 40.0f)};

    PGE_Derived() : Game(){}

    bool OnUserCreate(){
        return true;
    }

    bool OnUserUpdate(float fElapsedTime){
        dt = fElapsedTime;
        Clear(olc::GREY);
        SetPixelMode(olc::Pixel::NORMAL);

        ray.p1 = GetMousePos();
        Console::Out(Ray2({0.0f, 0.0f}, {3.0f, 2.0f}).Normal());

        DrawLine(other_ray.Start(), other_ray.End(), olc::BLUE);
        if(ray.VsOtherRay(other_ray).is_hit){
            DrawLine(ray.Start(), ray.End(), olc::RED);
        }
        else{
            DrawLine(ray.Start(), ray.End(), olc::GREEN);
        }

        return true;
    }
};

int main(){
    PGE_Derived game;
    if (game.Construct(400, 200, 1, 1, false, true, true))
	game.Start();

    return 0;
}

Make a CMakeLists.txt in /root.

cmake_minimum_required(VERSION 3.10)

project(ExecutableName)
add_subdirectory(external/UFO-Cells) #CMakeLists.txt for engine is in folder called "engine"

set(
    SRC
    src/main.cpp
)

add_executable(${PROJECT_NAME} ${SRC})

target_link_libraries(${PROJECT_NAME} PUBLIC UFOCells)

Build and Run

cd build
cmake .. -DCMAKE_CXX_FLAGS="-ggdb"
make
./ExecutableName