Everyday Unity

Polygon Clipping (Part 1 & 2)

Polygon clipping is an interesting problem: how do you intersect, union, or diff two polygons?
The Greiner-Hormann clipping algorithm is quite beautiful and intuitive. However the Greiner-Hormann clipping algorithm cannot deal with coincident lines. This turns out to be a huge pain – so there is part 2 that works for all polygons.

https://sean.cm/a/polygon-clipping-pt1
https://sean.cm/a/polygon-clipping-pt2

#polygonclipping #clipping

Create A White Noise Shader With Shader Graph In Unity

https://vintay.medium.com/create-a-white-noise-shader-with-shader-graph-in-unity-220dd9d24e92

#shadergraph #whitenoise #vfx #tv

Create Bouncing/Ricocheting Raycast Bullets From Scratch! Unity Tutorial

Learn how to implement, from scratch, raycast (or "hitscan") bullets, with trails, that can bounce/ricochet off objects!

https://youtu.be/GkStW8-Q5P0

#ricochet #bullet #feature

Culling system and effects for Top-Down games

Simple fade out/culling system for top down game with 3 different shader-based effects to fade out objects that get in the way of the player seeing their avatar

https://www.patreon.com/posts/culling-system-60214085

#cull #vfx

OPTIMISING A COMPUTE SHADER
Using RenderDoc to help find a faster compute shader for the simple lens flare effect.

https://samdriver.xyz/article/optimise-compute-shader

#shader #profiling #renderdoc #nativeprofiling

How to make a Homing Missile in Unity with Trajectory Prediction (source included)

https://youtu.be/Z6qBeuN-H1M

#missile #feature

Scriptable Renderer Feature

A barebones sample implementation of a scriptable renderer feature for Unity's scriptable render pipeline

https://samdriver.xyz/article/scriptable-render

#srp #rendering

Unity Shader Graph Procedural Planet Water Tutorial

https://timcoster.com/2021/09/24/unity-shader-graph-procedural-planet-water-tutorial/

#water #planet #shadergraph

Voronoi Noise

https://www.ronja-tutorials.com/post/028-voronoi-noise/

#shader #noise #voronoi #pcg

Kenney • Prototype Textures
Free textures for prototyping

https://kenney.nl/assets/prototype-textures

#assets #prototype

Unity Spline-Based Tank Tracks System Package

https://timcoster.com/2021/01/17/unity-spline-based-tank-tracks-system-package/

#tank #tracks

Talking to your unmanaged code efficiently from Unity using P/Invoke

How to use P/Invoke with blittable types. A type is blittable if it has the same memory representation in C# as in the target language.

https://medium.com/baracoda-engineering/talking-to-your-unmanaged-code-efficiently-from-unity-using-p-invoke-6bb26f43f428

#extern #plugins #pinvoke

Trajectory prediction in Unity

Predict trajectory with Physics.Simulate. Not sure about performance if there is a lot of stuff going on, but should be absolutely fine for small simulations. Anyway in case you use Physics.Simulate a lot dont forget to always profile before optimizing. Or if you are still in a preproduction phase, make a small proof of concept with expected amount (and more for greater confidence) of operations to simulate, so you can be sure that this approach is suitable for your case.

https://www.youtube.com/watch?v=4VUmhuhkELk

Repo: https://github.com/ToughNutToCrack/TrajectoryPrediction

#simulation #physics #trajectory #prediction

13 Most Useful Unity Attributes

https://medium.com/geekculture/13-most-useful-unity-attributes-d7514bc749d

#editor #attribute #tips

Feature highlight: IL2CPP runtime performance improvements in Unity 2021.2

https://blog.unity.com/technology/feature-highlight-il2cpp-runtime-performance-improvements-in-unity-20212

#il2cpp

Unity Recorder

Use the Unity Recorder package to capture and save data during Play mode. For example, you can capture gameplay or a cinematic and save it as an .mp4 file.

https://docs.unity3d.com/Packages/com.unity.recorder@2.0/manual/index.html

#video #recorder

Rendering meshes in Unity without MeshRenderers

Simple example how to use DrawMesh(), DrawMeshNow(), and DrawMeshInstanced().

https://www.edraflame.com/blog/unity-graphics-drawmesh-drawmeshinstanced/

#rendering #drawmesh #instancing

UI with rectangles? Don't use null as a source!
Create a 1x1 square image and add it to your sprite atlas. That way all rectangles will be drawn together with the images. You can reduce several draw calls per frame!
When using a null reference in an Image field: "None (Sprite)", Unity actually puts a UnityWhite texture in there that causes the GPU to make an additional draw call.

https://twitter.com/HetiDev/status/1493317817688629252

#ui #optimization #tips

Unity VFX Graph - Stylized laser beam tutorial

https://youtu.be/_SaBXY-Ejqo

#vfx #shadergraph #vfxgraph #beam #laser

Triangle.Net-for-Unity

Triangulation lib wrapper for Unity. Triangle.NET generates 2D (constrained) Delaunay triangulations and high-quality meshes of point sets or planar straight line graphs. I guess you already knew about it, if you were interested in mesh generation. If not, then if you ever stumble upon triangulation in Unity, you should know there is the lib available for doing it.

https://github.com/Nox7atra/Triangle.Net-for-Unity

#triangulation #mesh