Updating README.org to explain new project, tweak speed constants, new gifs

README.org

@@ -1,39 +1,105 @@
-### FPS Scene
+#+OPTIONS: toc:nil
 
-You can walk around the scene with simple FPS controls.
-Open `scene.html` with an http server, you can use the following;
+* FP Rendering Engine
+** TL;DR
+Graphics + Web + Functional Programming
 
-```python3 -m http.server 8000```
+[[https://ferano.io/3d-fp/][Play it here]]
 
-Unfortunately, elm-reactor has issues with loading obj files so that's why the
-python server is needed.
+** About
+The goal of this project is to learn about the intersection of 3 different
+topics; graphics, web, and functional programming. The FP acronym refers to both
+the fact that it's a *F*irst *P*erson camera, as well as being implemented using
+*F*unctional *P*rogramming. It uses Elm with WebGL to create a 3D first-person
+scene implementing several lower level graphics techniques including matrix
+transformations to model parent/child local transforms, texture mapping, and
+basic lighting with shaders.
 
-![alt text](screenshots/elm-fps.png "FPS Scene")
+I worked on this project for a few weeks in 2019, however, it was just thrown
+into a git repo without much consideration, along with [[https://git.ferano.io/JosephFerano/pqtorusknot][this]] project. I felt this
+deserved a little bit more TLC, so I decided to spruce it up a little bit and
+move it to its own repository. Here's the original [[https://github.com/JosephFerano/elm-graphics][project]].
+
+** Showcase
+
+*** First Person Camera
+[[file:screenshots/play1.gif]]
+
+[[https://ferano.io/3d-fp/play1.mp4][Higher Resolution Version]]
+*** Sextus
+[[file:screenshots/sextus.gif]]
+
+[[https://ferano.io/3d-fp/sextus.mp4][Higher Resolution Version]]
 
 
-##### Controls
+** Building with Elm 0.18.0
+To install the binaries manually, follow this short guide; - [[https://sirfitz.medium.com/install-elm-0-18-0-in-2021-3f64ce298801][Install Binaries]]
 
-Mouse - Look Rotation
+If you want to use =npm= instead; - =npm install -g elm@elm0.18.0=
 
-WASD - Player movement
+If you use =npm=, note that you will likely need an older version of Node.js, so
+it is recommended to use [[https://github.com/nvm-sh/nvm][nvm]] for that. I have not attempted this method
+personally, fyi.
 
-◀ ▼ ▲ ▶ - Move the Robot
+Once you have the Elm compiler, go ahead and run
 
-N and M - Rotate robot left and right
+=elm make Scene.elm=
 
-Y and H - Rotate robot arm up and down
+And that should first pull in all the dependencies then generate an =index.html=
+file.
 
-U and J - Rotate robot hand up and down
+*** Issues with dependencies
+One of the dependencies of this project, =Zinggi/elm-obj-loader=, is getting a 404
+when Elm tries to pull in all the deps during compilation. Therefore this
+dependency will be included in version control, on the off chance someone
+actually wants to build this.
 
+** Running
+In order to be able to load the textures and models, the files must be served by
+an HTTP server because of browser security, see [[https://developer.mozilla.org/en-US/docs/Web/Security/Same-origin_policy][SOP]] and [[https://developer.mozilla.org/en-US/docs/Glossary/CORS][CORS]] if curious.
 
-### PQTorusknot
+You can use ~elm-reactor~, run the command and open up your browser to
+~https://localhost:8000~ and then click on ~Scene.elm~ in the nice project webview
+provided. If you don't want to do that and have Python 3 installed, run =python3
+-m http.server=, but make sure to compile with the ~elm make Scene.elm~ command
+first.
 
-Either open up `torus.html`, or use the command `elm-reactor`, if you want to be able to modify the source file and compile;
+** How to Play
+You can walk around the scene and also control the robot which I have named
+Emperor Sextus, Conqueror of the Luddites.
 
-https://guide.elm-lang.org/install.html
+*** Keybindings
+- Look Around: =Mouse=
 
-Alternatively, here's the Ellie link
+- FPS Movement: =WASD=
 
-https://ellie-app.com/vVTgpBj77ra1
+- Robot Movement: =◀ ▼ ▲ ▶=
 
-![alt text](screenshots/elm-knot.png "PQ Torus Knot")
+- Rotate Robot: =N | M=
+
+- Rotate Robot Arm: =H | J=
+
+- Rotate Robot Hand: =Y | U=
+
+** Takeaways
+The Elm WebGL library provides a few abstractions (namely =WebGL.Entity=) that
+help reduce some of the boilerplate usually associated with creating a WebGL
+application from scratch. While it was useful for the purposes of this
+prototype, it remains to be seen if it would scale if this would become a proper
+3D rendering engine.
+
+Despite what might be potentially undiscovered performance issues, Elm was
+pleasant to work with, and it sold me two ideas; functional programming and
+minimalism. The touted safety and correctness were noticeable, the learning
+curve wasn't as steep, and using the Elm debugger to be able to step back in
+time through the game was eye-opening in showing what's possible when you
+architect your state management with immutability in mind. It would be
+interesting to see if a modern game engine could switch between the functional,
+immutable data structures in a debug context and the cache-friendly mutable data
+structures for improved performance in a release build. Thus boosting
+productivity during development, while still remaining performant in the hands
+of players.
+
+** License
+This project is licensed under the terms of the MIT license. For more
+information, see the included LICENSE file.

Scene.elm

@@ -107,7 +107,7 @@ update msg model =
                     (model.keys.a , model.keys.s , model.keys.w , model.keys.d)
                     model.lookDir
                     model.pos
-                    0.08
+                    0.11
                 , robot = updateRobot model dt
                 , rot = model.rot + 0.001 * dt}
             WindowResized size -> { model | winSize = size }
@@ -126,15 +126,16 @@ update msg model =
 
 updateRobot: Model -> Time -> Robot
 updateRobot { robot , keys } dt =
-    let rr part = part + dt * 0.005
-        rl part = part - dt * 0.005
+    let rotSpeed = 0.003
+        rr part = part + dt * rotSpeed
+        rl part = part - dt * rotSpeed
         rot = radians robot.rot
     in { pos =
            movePos
                (keys.left, keys.down, keys.up, keys.right)
                (vec3 (sin rot) (sin rot) (cos rot))
                robot.pos
-               0.03
+               0.05
     , rot = if keys.n then rr robot.rot else if keys.m then rl robot.rot else robot.rot
     , armRot =
         let angle = if keys.j then rr robot.armRot else if keys.h then rl robot.armRot else robot.armRot
@@ -168,8 +169,8 @@ getRobot model =
             |> Mat4.inverse |> Maybe.withDefault Mat4.identity
             |> Mat4.mul (Mat4.makeTranslate3 0 0 0.6)
             |> Mat4.mul arm
-    in [ getEntity3 model (body |> Mat4.scale3 0.5 0.5 0.5) cube Color.blue
-       , getEntity3 model (arm |> Mat4.scale3 0.2 0.2 0.5) cube Color.green
+    in [ getEntity3 model (body |> Mat4.scale3 0.5 0.5 0.5)    cube Color.blue
+       , getEntity3 model (arm  |> Mat4.scale3 0.2 0.2 0.5)    cube Color.green
        , getEntity3 model (hand |> Mat4.scale3 0.15 0.15 0.45) cube Color.red
        ] |> List.concat