class: center, middle # Quiver -- ## A Pseudo-3D Game Engine -- ### Written in C++ -- #### In My Spare Time -- But why --- # Who is she Rachel Crawford Likes to make games and things Junior Network Programmer at Rockstar North .center[<img src="/images/who-is-she.jpg" style="width: 50%">] --- # What is Quiver Quiver is a game engine It's like these: <table width="100%" border="0%"> <tr> <td><img src="/images/unreal.png" style="width: 90%"></td> <td><img src="/images/unity.png" style="width: 90%"></td> <td><img src="/images/game-maker.png"></td> </tr> </table> But WAY more scrappy! -- Also not ready. -- Also not as good. -- Quiver has specific goals: - Make making games with pseudo-3D graphics easy - Have fun --- ## What is Pseudo-3D Think *Wolfenstein 3D*, *Doom*. <table width="100%" border="0%"> <tr> <td><img src="/images/wolf3d.gif"></td> <td><img src="/images/doom.jpg" style="width:100%"></td> </tr> </table> --- ## What is Quarrel Quarrel is a game made with Quiver .center[<img src="/images/quarrel-0.png" style="width: 100%">] --- # Let's go .center[<img src="https://i.imgur.com/Ll9KkK7.gif" style="width: 80%">] --- # Are you still awake .center[<img src="/images/sad-children-0.png" style="width: 80%">] --- # Things I'm Using -- C++14 -- [SFML](https://www.sfml-dev.org/) -- [Box2D](https://github.com/erincatto/Box2D) -- [ImGui](https://github.com/ocornut/imgui) using [ImGui-SFML](https://github.com/eliasdaler/imgui-sfml) -- [Catch](https://github.com/catchorg/Catch2) -- [json.hpp](https://github.com/nlohmann/json) -- [Premake](https://premake.github.io/) -- [spdlog](https://github.com/gabime/spdlog), [fmt](https://github.com/fmtlib/fmt), [optional](https://github.com/akrzemi1/Optional)... --- # How it Works: Pseudo-3D Rendering *Please imagine cool diagrams* Raycasting like Wolfenstein 3D - For each horizontal pixel, cast a ray ```cpp // physicsWorld is a b2World physicsWorld.RayCast(&callback, cameraPosition, rayEnd); ``` - From each fixture, extract render info ```cpp const auto renderData = (FixtureRenderData*)intersection.m_fixture->GetUserData(); ``` - Draw a line on the screen for the intersection ```cpp // Implementation details... ``` In its current iteration, this code makes judicious use of STL --- # How it Works: Entities Baby's first Entity Component System World owns Entity Entity owns Components Components interface with Systems --- # Documentation <br><br><br><br><br><br><br> <img src="/images/john-travolta.gif" align="right"> --- # So much to do Scripting, better input handling, input recording and playback, more unit tests, benchmarks, more audio features, pathfinding, more animation features, support for local multiplayer, support for remote multiplayer (networking)... It's a lot of work! ## How to Do It? --- # Less like this... .center[<img src="/images/girl-genius.jpg" style="width: 40%">] --- #...more like this .center[<img src="/images/makin-a-house.jpg" style="width: 90%">] --- #...or this! .center[<img src="/images/gardenin.jpeg" style="width: 80%">] --- # Thanks for Listening! Quiver: [github.com/rachelnertia/Quiver](https://github.com/rachelnertia/Quiver) Rachel Crawford Twitter: [@nershly](https://twitter.com/nershly) Website: [rachelnertia.github.io](https://rachelnertia.github.io) This presentation was made using [Remark.js](https://github.com/gnab/remark). ## Questions? --- # Promo: Edindies Co-working group for indie/hobby game development Every Saturday at 1pm - 6pm Levels, on Holyrood Road [@edindies](https://twitter.com/edindies) - [edindi.es](http://edindi.es/) <br> .center[]