84 lines
2.7 KiB
Markdown
84 lines
2.7 KiB
Markdown
# FP Rendering Engine
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## TL;DR
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Graphics + Web + Functional Programming
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[Play it here](https://ferano.io/3d-fp/)
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## About
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The goal of this project is to learn about the intersection of 3 different
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topics; graphics, web, and functional programming. The FP acronym refers to both
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the fact that it's a **F**irst **P**erson camera, as well as being implemented using
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**F**unctional **P**rogramming. It uses Elm with WebGL to create a basic 3D first-person
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scene implementing several lower level graphics techniques including matrix
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transformations to model parent/child local transforms, texture mapping, and
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basic lighting with shaders. Consider it the humble beginnings of a functional
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3D graphics engine. The last major work done on this was in 2019, however, it
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was just thrown into a git repo without much consideration, along with other
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another small graphics project. I felt it deserved a little bit more TLC than
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that. Here's the original
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[project](https://github.com/JosephFerano/elm-graphics).
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## Showcase
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## Building with Elm 0.18.0
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To install the binaries manually, follow this short guide;
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- [Install Binaries](https://sirfitz.medium.com/install-elm-0-18-0-in-2021-3f64ce298801)
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If you want to use `npm` instead;
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- `npm install -g elm@elm0.18.0`
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If you use `npm`, note that you will likely need an older version of Node.js, so
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it is recommended to use [`npm`](https://github.com/nvm-sh/nvm) for that.
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Once you have the Elm compiler, go ahead and run
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```elm make Scene.elm```
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And that should first pull in all the dependencies then generate an `index.html` file.
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### Issues with dependencies
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One of the dependencies of this project, `Zinggi/elm-obj-loader`, is getting a
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404 when Elm tries to pull in all the dependencies during compilation. Therefore
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this dependency will be included in version control, on the off chance someone
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actually wants to build this.
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## Running
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In order to be able to load the textures and models, the files must be served
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by an HTTP server because of browser security, see
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[SOP](https://developer.mozilla.org/en-US/docs/Web/Security/Same-origin_policy)
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and [CORS](https://developer.mozilla.org/en-US/docs/Glossary/CORS) if curious.
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If you have Python 3 installed, simply run `python3 -m http.server`. If you
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would like to use `elm-reactor`, run the command and then click on `index.html`
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in the nice project webview provided.
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## Controls
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- Look Around: `Mouse`
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- FPS Movement: `WASD`
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- Robot Movement: `◀ ▼ ▲ ▶`
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- Rotate Robot: `N | M`
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- Rotate Robot Arm: `Y | H`
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- Rotate Robot Hand: `U | J`
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## License
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This project is licensed under the terms of the MIT license. For more
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information, see the included LICENSE file.
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