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little-cosmos.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="initial-scale=1.0">
<title>Little Cosmos · Joe Binns</title>
<link rel="stylesheet" href="styles.css">
<link id="shortcuticon" rel="shortcut icon" href="../images/jb.svg">
</head>
<body>
<div class="model-preview">
<overlay>
</overlay>
<canvas class="webgl">
</canvas>
</div>
<div class="padding logo-wrapper">
<logo>
<a href="/" class="gradient-multiline-invert">
<h1>
<span>
Joe
<br>
Binns
</span>
</h1>
</a>
</logo>
</div>
<div class="interface">
<menu class="padding">
<optHide>
<div style="width: 100px;">
</div>
<itemAlt>
<div class="tr" style="height: 24px;">
<div class="td">
<a class="hyperimage" href="mailto:[email protected]" target="_blank"><img id="mail" src="images/mail_box_optimised.svg" alt="email" width="20" height="20"></a>
<a class="hyperimage" href="https://www.linkedin.com/in/joe-binns/" target="_blank"><img id="linkedin" src="images/linkedin_box_optimised.svg" alt="LinkedIn" width="20" height="20"></a>
</div>
</div>
<div class="tr" style="height: 24px;">
<div class="td">
<a class="hyperimage" href="https://github.com/joebinns" target="_blank"><img id="github" src="../images/github_box_optimised.svg" alt="GitHub" width="20" height="20"></a>
<a class="hyperimage" href="https://joebinns.itch.io/" target="_blank"><img id="itchdotio" src="../images/itchdotio_box_optimised.svg" alt="itch.io" width="20" height="20"></a>
<a class="hyperimage" href="https://www.youtube.com/@joebinns95/" target="_blank"><img id="youtube" src="../images/youtube_box_optimised.svg" alt="YouTube" width="20" height="20"></a>
</div>
</div>
</itemAlt>
<item>
<div class="tr" style="height: 24px; position:relative; top: 6px">
<div class="td">
<a class="hyperlink lowercase" href="./about">about</a>
</div>
</div>
<div class="tr" style="height: 24px; position:relative; top: 6px">
<div class="td">
<a class="hyperlink lowercase" href="../documents/cv/cv-joe-binns.pdf">curriculum vitae</a>
</div>
</div>
</item>
</optHide>
</menu>
<div class="top right" style="z-index: 20; padding: 30px;">
<a class="hyperimage" href="/" ><img id="back" src="../images/back.svg" alt="back" width="40" height="40"></a>
</div>
</div>
<div class="content">
<project>
<h1 class="section">
Little Cosmos
</h1>
<div class="table project-metadata">
<div class="tr">
<item class="td">
<h3>
Links
</h3>
<info>
<p>
<a class="hyperimage" href="" target="_blank" style="display: none;"><img id="websiteProj" src="../images/globe_box_optimised.svg" alt="website" width="20" height="20"></a>
<a class="hyperimage" href="" target="_blank" style="display: none;"><img id="githubProj" src="../images/github_box_optimised.svg" alt="GitHub" width="20" height="20"></a>
<a class="hyperimage" href="" target="_blank" style="display: none;"><img id="steamProj" src="../images/steam_box.svg" alt="Steam" width="20" height="20"></a>
<a class="hyperimage" href="" target="_blank" style="display: none;"><img id="switchProj" src="../images/switch_box.svg" alt="Nintendo Switch" width="20" height="20"></a>
<a class="hyperimage" href="https://abramshanna.itch.io/little-cosmos" target="_blank"><img id="itchdotioProj" src="../images/itchdotio_box_optimised.svg" alt="itch.io" width="20" height="20"></a>
<a class="hyperimage" href="https://youtu.be/fFb1iS1EkoQ?si=gvdOasdCJ-iFVPjj" target="_blank"><img id="youtubeProj" src="../images/youtube_box_optimised.svg" alt="YouTube" width="20" height="20"></a>
<a class="hyperimage" href="" target="_blank" style="display: none;"><img id="documentProj" src="../images/document_box.svg" alt="document" width="20" height="20"></a>
</p>
</info>
</item>
<item class="td">
<h3>
Dates
</h3>
<info>
<p>
May 2023 — June 2023
</p>
</info>
</item>
</div>
<div class="tr">
<item class="td">
<h3>
Team
</h3>
<info>
<p>
<a class="hyperlink" href="/">Myself</a>, Gameplay Programmer
<br>
<a class="hyperlink" href="http://joakimkarbing.net/">Joakim Karbing</a>, UI Programmer
<br>
<a class="hyperlink" href="https://www.linkedin.com/in/abramshanna/">Hanna Eriksson</a>, Level Designer & Gameplay Designer
<br>
<a class="hyperlink" href="https://www.linkedin.com/in/arvidrongedal/">Arvid Rongedal</a>, Level Designer & Audio
<br>
<a class="hyperlink" href="https://www.linkedin.com/in/eliana-b-parada-235535239/">Eliana Parada</a>, UI Designer
<br>
<a class="hyperlink" href="https://www.linkedin.com/in/arthur-wezeman-sotheygavemethiskindofpowernowdidtheyquestionmark/">Arthur Wezeman</a>, QA
<br>
<a class="hyperlink" href="https://www.linkedin.com/in/blair-bergman-499302196/">Blair Bergman</a>, Product Owner & Technical Artist
<br>
<a class="hyperlink" href="https://www.linkedin.com/in/hjalmar-berg-b0938324b/">Hjalmar Berg</a>, Environment Artist
<br>
<a class="hyperlink" href="https://www.linkedin.com/in/krist%C3%ADn-gu%C3%B0mundsd%C3%B3ttir-72b8091b5/">Kristín Guðmundsdóttir</a>, Character Artist
<br>
</p>
</info>
</item>
<item class="td">
<h3>
Languages
</h3>
<info>
<p>
Unreal Engine 5
<br>
C++
<br>
Python
<br>
Perforce
</p>
</info>
</item>
</div>
</div>
<div class="document">
<h3>
Trailer
</h3>
<div class="video-block">
<div class="video-wrapper">
<iframe frameborder="0" width="100%" height="100%" src="https://www.youtube.com/embed/fFb1iS1EkoQ?loop=1&playlist=fFb1iS1EkoQ" title="YouTube video player" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen>
</iframe>
</div>
<iframe height="167" frameborder="0" src="https://itch.io/embed/2136039?dark=true" style="margin-bottom:10px; width: 100%;">
<a href="https://abramshanna.itch.io/little-cosmos">
Little Cosmos by Futuregames
</a>
</iframe>
</div>
<details>
<summary>
Arbitrary Gravity Character Controller
</summary>
<p>
Adding arbitrary gravity support to Unreal's character would require major overhauls to its movement component.
I therefore opted to design and create a bespoke character controller from the ground up.
As a starting point, I ported from Unity and redesigned an old physics-based character controller of mine.
Working off a concept I was already comfortable with allowed me to rapidly lay down the foundation for Little Cosmos for the rest of the team;
this was crucial in a fast-paced and otherwise unfamiliar working environment.
The physics-based character controller approach came with some additional benefits specific to our platformer, such as supporting force-based gravity.
</p>
<div class="video-block">
<table>
<caption><u>Final version of the arbitrary gravity character controller.</u></caption>
<tr><td>
<video autoplay muted loop>
<source src="../videos/planet-hopping.mp4" type="video/mp4">
</video>
</td></tr>
</table>
</div>
<!--
<details>
<summary>Player Pawn</summary>
<div id="player-pawn-h">
<p>PlayerPawn.h:</p>
<script src="https://emgithub.com/embed-v2.js?target=https%3A%2F%2Fgithub.com%2Fjoebinns%2Flittle-cosmos-code%2Fblob%2Fmain%2FSource%2FSpacetimeGame%2FPublic%2FPlayer%2FPlayerPawn.h%23L22-L220&style=github-dark&type=code&showBorder=on&showLineNumbers=on&showFullPath=on&showCopy=on"></script>
</div>
<div id="player-pawn-cpp">
<p>PlayerPawn.cpp:</p>
<script src="https://emgithub.com/embed-v2.js?target=https%3A%2F%2Fgithub.com%2Fjoebinns%2Flittle-cosmos-code%2Fblob%2Fmain%2FSource%2FSpacetimeGame%2FPrivate%2FPlayer%2FPlayerPawn.cpp%23L18-359&style=github-dark&type=code&showBorder=on&showLineNumbers=on&showFullPath=on&showCopy=on"></script>
</div>
</details>
<details>
<summary>Player Physics Actor</summary>
<div id="player-physics-actor-h">
<p>PlayerPhysicsActor.h:</p>
<script src="https://emgithub.com/embed-v2.js?target=https%3A%2F%2Fgithub.com%2Fjoebinns%2Flittle-cosmos-code%2Fblob%2Fmain%2FSource%2FSpacetimeGame%2FPublic%2FPlayer%2FPlayerPhysicsActor.h%23L14-L296&style=github-dark&type=code&showBorder=on&showLineNumbers=on&showFullPath=on&showCopy=on"></script>
</div>
<div id="player-physics-actor-cpp">
<p>PlayerPhysicsActor.cpp:</p>
<script src="https://emgithub.com/embed-v2.js?target=https%3A%2F%2Fgithub.com%2Fjoebinns%2Flittle-cosmos-code%2Fblob%2Fmain%2FSource%2FSpacetimeGame%2FPrivate%2FPlayer%2FPlayerPhysicsActor.cpp%23L13-L460&style=github-dark&type=code&showBorder=on&showLineNumbers=on&showFullPath=on&showCopy=on"></script>
</div>
</details>
-->
</details>
<details>
<summary>
Sub-Stepping Tick
</summary>
<p>
Being my first time working with physics at the core of the player experience in Unreal, I entered the project largely negligent of the implications that may come from applying physics outside a fixed timestep.
The issue was largely unseen until the final stretch of development.
As the map got filled to the brim, we found framerate began to drop;
with this drop came an unpredictable and grossly inaccurate physics simulation.
Being made aware of the problem with only a couple of days of development remaining meant that quick thinking would need to come to the rescue.
With insufficient time to implement an optimal solution, such as a substep tick function, I opted to use a fixed frame rate of 60 fps.
With some QA and profiling, we were able to identify framerate drops to be most drastic when 'looking up' at large sections of the level.
The artists were then able to quickly identify which particle effects and shaders were least performant and remedy the problem.
In the final build, we all achieved a consistent 60 fps, free from hiccups.
</p>
<div class="video-block">
<table>
<caption><u>Applying physics on tick at ~30 fps (left), applying physics on tick at ~60 fps (right).</u></caption>
<tr><td>
<video autoplay muted loop>
<source src="../videos/unlocked-framerate.mp4" type="video/mp4">
</video>
</td></tr>
</table>
</div>
<p>
Since wrapping up Little Cosmos, I've been independently developing the systems used.
The first priority in doing so was to experiment with using a sub-stepped tick for applying physics.
See the results below for yourself!
For those interested in learning more about this topic, here are some excellent resources I came across whilst creating my own sub-stepping tick in Unreal:
<a class="hyperlink" href="http://www.aclockworkberry.com/unreal-engine-substepping/">Giuseppe Portelli (Theoretical)</a>,
<a class="hyperlink" href="https://mansisaksson.com/view/ue4-substepping/">Måns Isaksson (Practical)</a>.
</p>
<div class="video-block">
<table>
<caption><u>Applying physics on a sub-stepped tick at 30 fps (left), applying physics on a sub-stepped tick at 60 fps (right).</u></caption>
<tr><td>
<video autoplay muted loop>
<source src="../videos/substepping-tick.mp4" type="video/mp4">
</video>
</td></tr>
</table>
</div>
<details>
<summary>Substep Tick Interface</summary>
<div id="substep-tick-interface-h">
<p>SubstepTickInterface.h:</p>
<script src="https://emgithub.com/embed-v2.js?target=https%3A%2F%2Fgithub.com%2Fjoebinns%2Flittle-cosmos-code%2Fblob%2Fmain%2FSource%2FSpacetimeGame%2FPublic%2FSubstepTick%2FSubstepTickInterface.h%23L8-L29&style=github-dark&type=code&showBorder=on&showLineNumbers=on&showFullPath=on&showCopy=on"></script>
</div>
<div id="substep-tick-interface-cpp">
<p>SubstepTickInterface.cpp:</p>
<script src="https://emgithub.com/embed-v2.js?target=https%3A%2F%2Fgithub.com%2Fjoebinns%2Flittle-cosmos-code%2Fblob%2Fmain%2FSource%2FSpacetimeGame%2FPrivate%2FSubstepTick%2FSubstepTickInterface.cpp%23L6-L31&style=github-dark&type=code&showBorder=on&showLineNumbers=on&showFullPath=on&showCopy=on"></script>
</div>
</details>
</details>
<details>
<summary id="any-shape-you-like">
'Any Shape You Like' Gravity
</summary>
<p>
From researching Mario Galaxies approach to gravity, I learnt that Nintendo used discrete regions of gravity fields placed around the level.
Whilst this worked for a large company like Nintendo on a game with many years of development, I was a little sceptical about limiting our gravity fields to certain regions.
What if the player escapes all regions of gravity, or multiple regions are overlapping?
As our team lacked a dedicated level designer, I instead opted for an approach that was more programmatic, less demanding on designers and frankly, more interesting for me.
</p>
<div class="video-block">
<table>
<caption><u>
Any Shape You Like
</u></caption>
<tr><td>
<video autoplay muted loop>
<source src="../videos/any-shape-you-like.mp4" type="video/mp4">
</video>
</td></tr>
</table>
</div>
<details>
<summary>Gravity Sampler Component</summary>
<div id="gravity-sampler-component-h">
<p>GravitySamplerComponent.h:</p>
<script src="https://emgithub.com/embed-v2.js?target=https%3A%2F%2Fgithub.com%2Fjoebinns%2Flittle-cosmos-code%2Fblob%2Fmain%2FSource%2FSpacetimeGame%2FPublic%2FGravity%2FGravitySamplerComponent.h%23L11-L66&style=github-dark&type=code&showBorder=on&showLineNumbers=on&showFullPath=on&showCopy=on"></script>
</div>
<div id="gravity-sampler-component-cpp">
<p>GravitySamplerComponent.cpp:</p>
<script src="https://emgithub.com/embed-v2.js?target=https%3A%2F%2Fgithub.com%2Fjoebinns%2Flittle-cosmos-code%2Fblob%2Fmain%2FSource%2FSpacetimeGame%2FPrivate%2FGravity%2FGravitySamplerComponent.cpp%23L8-L138&style=github-dark&type=code&showBorder=on&showLineNumbers=on&showFullPath=on&showCopy=on"></script>
</div>
</details>
<!--
<details>
<summary>Editor Gravity Sampler Component</summary>
<div id="editor-gravity-sampler-component-h">
<p>EditorGravitySamplerComponent.h:</p>
<script src="https://emgithub.com/embed-v2.js?target=https%3A%2F%2Fgithub.com%2Fjoebinns%2Flittle-cosmos-code%2Fblob%2Fmain%2FSource%2FSpacetimeGame%2FPublic%2FGravity%2FEditor%2FEditorGravitySamplerComponent.h%23L12-L20&style=github-dark&type=code&showBorder=on&showLineNumbers=on&showFullPath=on&showCopy=on"></script>
</div>
<div id="editor-gravity-sampler-component-cpp">
<p>EditorGravitySamplerComponent.cpp:</p>
<script src="https://emgithub.com/embed-v2.js?target=https%3A%2F%2Fgithub.com%2Fjoebinns%2Flittle-cosmos-code%2Fblob%2Fmain%2FSource%2FSpacetimeGame%2FPrivate%2FGravity%2FEditor%2FEditorGravitySamplerComponent.cpp%23L8-L20&style=github-dark&type=code&showBorder=on&showLineNumbers=on&showFullPath=on&showCopy=on"></script>
</div>
</details>
-->
<details>
<summary>Gravity Component</summary>
<div id="gravity-component-h">
<p>GravityComponent.h:</p>
<script src="https://emgithub.com/embed-v2.js?target=https%3A%2F%2Fgithub.com%2Fjoebinns%2Flittle-cosmos-code%2Fblob%2Fmain%2FSource%2FSpacetimeGame%2FPublic%2FGravity%2FGravityComponent.h%23L10-L27&style=github-dark&type=code&showBorder=on&showLineNumbers=on&showFullPath=on&showCopy=on"></script>
</div>
<div id="gravity-component-cpp">
<p>GravityComponent.cpp:</p>
<script src="https://emgithub.com/embed-v2.js?target=https%3A%2F%2Fgithub.com%2Fjoebinns%2Flittle-cosmos-code%2Fblob%2Fmain%2FSource%2FSpacetimeGame%2FPrivate%2FGravity%2FGravityComponent.cpp%23L7-L40&style=github-dark&type=code&showBorder=on&showLineNumbers=on&showFullPath=on&showCopy=on"></script>
</div>
</details>
<p>
Calculating the direction of gravity for a position in the vicinity of a spherical planet is just a matter of calculating the vector from the sample position to the centre of the planet.
But consider a non-spherical planet, such as a cube.
Our gamified expectation is that the direction of gravity will be at a normal to the planet's surface.
However, what happens when we are not on the surface, but somewhere 'above'?
Even if we are able to determine the nearest point on the surface, we will experience dramatic changes in certain situations —
particularly for shapes with sharp corners.
</p>
<div class="video-block">
<table style="width:100%;">
<caption><u>Using surface normals</u></caption>
<tr style="width:100%;">
<td style="width:25%;"></td>
<td style="width:50%; padding-left: 20px; padding-right: 20px;">
<img id="normals" src="../images/little-cosmos/normals-light.svg" style="width: 100%; height: auto;">
</td>
<td style="width:25%;"></td>
</tr>
</table>
</div>
<p>
We're close to a solution, but not quite there.
Let's backtrack and consider what other measurements might be useful to us.
Gravitational force is a vector comprised of both direction and magnitude.
In reality, gravity's magnitude is determined as a function of the masses of the bodies involved and the distance between those masses.
That distance is often simplified to be the distance between the centre of the planet and the other body.
Whilst physics is a wonderful starting point, we must break physics in order to make something extraordinary.
I propose that a more useful measure of distance for a platformer with a variety of planet shapes and radii is the distance to the surface of the planet.
For instance, take the case of hopping from a planet with a large radius to one with a small radius.
Intuitively, the large planet should be the main effector until your jump has reached a height of roughly half the distance between the planet's surfaces, at which point the main effector should become the smaller planet.
If we wanted to adjust this switching point, we could simply assign a 'mass' value to the planets by which their influences could be scaled.
</p>
<div class="video-block">
<table style="width:100%;">
<caption><u>Midpoint between centres (left), midpoint between surfaces (right).</u></caption>
<tr style="width:100%;">
<td style="width:50%; padding-right: 20px;">
<img id="centers" src="../images/little-cosmos/center-distance-light.svg" style="width: 100%; height: auto;">
</td>
<td style="width:50%; padding-left: 20px;">
<img id="surfaces" src="../images/little-cosmos/surface-distance-light.svg" style="width: 100%; height: auto;">
</td>
</tr>
</table>
</div>
<p>
A common computational technique for finding the distance to the surface of a shape is signed distance functions, typically limited to shaders.
By representing planet's shapes using signed distance functions, we are able to determine the distance to surface of any given planet.
Furthermore, computationally differentiating the signed distance function gives us an approximation of the direction to the nearest planet's surface.
Approximations can be scary, but I found the error of the approximation to be completely insignificant with even first order, runtime suitable methods of calculation.
And that's it!
Just find the signed distance function of a shape and form a planet of any shape at will.
Thankfully, <a class="hyperlink" href="https://iquilezles.org/articles/distfunctions/">Inigo Quilez</a> has compiled an assortment of signed distance functions for our choosing.
</p>
<div class="video-block">
<table style="width:100%;">
<caption><u>Using the signed distance function</u></caption>
<tr style="width:100%;">
<td style="width:25%;"></td>
<td style="width:50%; padding-left: 20px; padding-right: 20px;">
<img id="sdf" src="../images/little-cosmos/sdf-light.svg" alt="sdf" style="width: 100%; height: auto;">
</td>
<td style="width:25%;"></td>
</tr>
</table>
</div>
<details>
<summary>Gravity Field Component</summary>
<div id="gravity-field-component-h">
<p>GravityFieldComponent.h:</p>
<script src="https://emgithub.com/embed-v2.js?target=https%3A%2F%2Fgithub.com%2Fjoebinns%2Flittle-cosmos-code%2Fblob%2Fmain%2FSource%2FSpacetimeGame%2FPublic%2FGravity%2FGravityFieldComponent.h%23L8-L50&style=github-dark&type=code&showBorder=on&showLineNumbers=on&showFullPath=on&showCopy=on"></script>
</div>
<div id="gravity-field-component-cpp">
<p>GravityFieldComponent.cpp:</p>
<script src="https://emgithub.com/embed-v2.js?target=https%3A%2F%2Fgithub.com%2Fjoebinns%2Flittle-cosmos-code%2Fblob%2Fmain%2FSource%2FSpacetimeGame%2FPrivate%2FGravity%2FGravityFieldComponent.cpp%23L8-L100&style=github-dark&type=code&showBorder=on&showLineNumbers=on&showFullPath=on&showCopy=on"></script>
</div>
</details>
<details>
<summary>Box Gravity Field Component</summary>
<div id="box-gravity-field-component-h">
<p>BoxGravityFieldComponent.h:</p>
<script src="https://emgithub.com/embed-v2.js?target=https%3A%2F%2Fgithub.com%2Fjoebinns%2Flittle-cosmos-code%2Fblob%2Fmain%2FSource%2FSpacetimeGame%2FPublic%2FGravity%2FFields%2FBoxGravityFieldComponent.h%23L12-L34&style=github-dark&type=code&showBorder=on&showLineNumbers=on&showFullPath=on&showCopy=on"></script>
</div>
<div id="box-gravity-field-component-cpp">
<p>BoxGravityFieldComponent.cpp:</p>
<script src="https://emgithub.com/embed-v2.js?target=https%3A%2F%2Fgithub.com%2Fjoebinns%2Flittle-cosmos-code%2Fblob%2Fmain%2FSource%2FSpacetimeGame%2FPrivate%2FGravity%2FFields%2FBoxGravityFieldComponent.cpp%23L7-L50&style=github-dark&type=code&showBorder=on&showLineNumbers=on&showFullPath=on&showCopy=on"></script>
</div>
</details>
<details>
<summary>Cylinder Gravity Field Component</summary>
<div id="cylinder-gravity-field-component-h">
<p>CylinderGravityFieldComponent.h:</p>
<script src="https://emgithub.com/embed-v2.js?target=https%3A%2F%2Fgithub.com%2Fjoebinns%2Flittle-cosmos-code%2Fblob%2Fmain%2FSource%2FSpacetimeGame%2FPublic%2FGravity%2FFields%2FCylinderGravityFieldComponent.h%23L12-L35&style=github-dark&type=code&showBorder=on&showLineNumbers=on&showFullPath=on&showCopy=on"></script>
</div>
<div id="cylinder-gravity-field-component-cpp">
<p>CylinderGravityFieldComponent.cpp:</p>
<script src="https://emgithub.com/embed-v2.js?target=https%3A%2F%2Fgithub.com%2Fjoebinns%2Flittle-cosmos-code%2Fblob%2Fmain%2FSource%2FSpacetimeGame%2FPrivate%2FGravity%2FFields%2FCylinderGravityFieldComponent.cpp%23L7-L55&style=github-dark&type=code&showBorder=on&showLineNumbers=on&showFullPath=on&showCopy=on"></script>
</div>
</details>
<details>
<summary>Sphere Gravity Field Component</summary>
<div id="sphere-gravity-field-component-h">
<p>SphereGravityFieldComponent.h:</p>
<script src="https://emgithub.com/embed-v2.js?target=https%3A%2F%2Fgithub.com%2Fjoebinns%2Flittle-cosmos-code%2Fblob%2Fmain%2FSource%2FSpacetimeGame%2FPublic%2FGravity%2FFields%2FSphereGravityFieldComponent.h%23L12-L31&style=github-dark&type=code&showBorder=on&showLineNumbers=on&showFullPath=on&showCopy=on"></script>
</div>
<div id="sphere-gravity-field-component-cpp">
<p>SphereGravityFieldComponent.cpp:</p>
<script src="https://emgithub.com/embed-v2.js?target=https%3A%2F%2Fgithub.com%2Fjoebinns%2Flittle-cosmos-code%2Fblob%2Fmain%2FSource%2FSpacetimeGame%2FPrivate%2FGravity%2FFields%2FSphereGravityFieldComponent.cpp%23L7-L48&style=github-dark&type=code&showBorder=on&showLineNumbers=on&showFullPath=on&showCopy=on"></script>
</div>
</details>
<!--
<details>
<summary>Gravity Oriented Actor</summary>
<div id="gravity-oriented-actor-h">
<p>GravityOrientedActor.h:</p>
<script src="https://emgithub.com/embed-v2.js?target=https%3A%2F%2Fgithub.com%2Fjoebinns%2Flittle-cosmos-code%2Fblob%2Fmain%2FSource%2FSpacetimeGame%2FPublic%2FGravity%2FEditor%2FGravityOrientedActor.h%23L11-L44&style=github-dark&type=code&showBorder=on&showLineNumbers=on&showFullPath=on&showCopy=on"></script>
</div>
<div id="gravity-oriented-actor-cpp">
<p>GravityOrientedActor.cpp:</p>
<script src="https://emgithub.com/embed-v2.js?target=https%3A%2F%2Fgithub.com%2Fjoebinns%2Flittle-cosmos-code%2Fblob%2Fmain%2FSource%2FSpacetimeGame%2FPrivate%2FGravity%2FEditor%2FGravityOrientedActor.cpp%23L8-L57&style=github-dark&type=code&showBorder=on&showLineNumbers=on&showFullPath=on&showCopy=on"></script>
</div>
</details>
-->
<br>
</details>
<details>
<summary>
Baked Gravity Fields
</summary>
<p>
Whilst gravity was calculated at runtime in Little Cosmos, I also experimented with baking the calculation into vector fields;
you can find a prototype for this application <a class="hyperlink" href="https://github.com/joebinns/vector-field-generator/releases/tag/0.1.0">here</a>.
The approach may be beneficial beyond just performance gains!
The exported vector field file type is the same used by Unreal for particle systems and the chaos physics system;
there's certainly more to be explored!
</p>
<div class="video-block">
<table style="width:100%;">
<caption><u>Vector Field Generator application</u></caption>
<tr style="width:100%;">
<td style="width:20%;"></td>
<td style="width:60%; padding-left: 20px; padding-right: 20px;">
<img src="../images/little-cosmos/vector-field-generator.png" alt="vector field generator" width="100%" height="100%">
</td>
<td style="width:20%;"></td>
</tr>
</table>
</div>
</details>
</div>
</project>
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<li>
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<h2>
<portfolio-prefix>
<date>next project</date><br>
<badge>🏅🏡</badge>
</portfolio-prefix>
<portfolio-title>Njuma</portfolio-title>
</h2>
</a>
</li>
</ul>
</div>
<p class="copyright-notice">
Copyright © 2021-2025 Joseph Alexander Binns. All rights reserved.
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