Skip to content

Instantly share code, notes, and snippets.

View Gforcex's full-sized avatar
🏸
Relax

Gforcex

🏸
Relax
104 followers · 30 following
View GitHub Profile
@vassvik
vassvik / Simulation_Projection.md
Last active October 31, 2025 15:18
Realtime Fluid Simulation: Projection

Realtime Fluid Simulation: Projection

The core of most real-time fluid simulators, like the one in EmberGen, are based on the "Stable Fluids" algorithm by Jos Stam, which to my knowledge was first presented at SIGGRAPH '99. This is a post about one part of this algorithm that's often underestimated: Projection

MG4_F32.mp4

Stable Fluids

The Stable Fluids algorithm solves a subset of the famous "Navier Stokes equations", which describe how fluids interact and move. In particular, it typically solves what's called the "incompressible Euler equations", where viscous forces are often ignored.

@munrocket
munrocket / wgsl_3d_sdf.md
Last active September 6, 2025 09:47
WGSL 3D SDF Primitives

WGSL 3D SDF Primitives

Revision: 06.08.2023, https://compute.toys/view/407

Sphere - exact

fn sdSphere(p: vec3f, r: f32) -> f32 {
  return length(p) - r;
}
@Cyanilux
Cyanilux / Tex2DArrayCreator.cs
Last active October 17, 2023 12:00
EditorWindow for creating & editing Texture 2D Arrays. Note : All textures must have same width/height, mipmap count and format/compression type! (Place in an "Editor" folder inside assets, go to Window -> "Create Texture2DArray")
using System.Collections.Generic;
using UnityEngine;
using UnityEditor;
using UnityEditorInternal;
using System.IO;
public class Tex2DArrayCreator : EditorWindow {
private string fileName;
private List<Texture2D> textures = new List<Texture2D>();
@totallyRonja
totallyRonja / MaterialGradientDrawer.cs
Last active March 31, 2025 13:38
A Material Property Drawer for the [Gradient] attribute which lets you edit gradients and adds them to the shader as textures. More information here: https://twitter.com/totallyRonja/status/1368704187580682240
using System;
using System.Collections.Generic;
using System.Linq;
using UnityEditor;
using UnityEngine;
using Object = UnityEngine.Object;
public class MaterialGradientDrawer : MaterialPropertyDrawer {
private int resolution;
@bgolus
bgolus / WorldNormalFromDepthTexture.shader
Last active October 9, 2025 03:53
Different methods for getting World Normal from Depth Texture, without any external script dependencies.
Shader "WorldNormalFromDepthTexture"
{
Properties {
[KeywordEnum(3 Tap, 4 Tap, Improved, Accurate)] _ReconstructionMethod ("Normal Reconstruction Method", Float) = 0
}
SubShader
{
Tags { "RenderType"="Transparent" "Queue"="Transparent" }
LOD 100
@2DArray
2DArray / AutoCopyToGPU.cs
Last active October 12, 2020 13:56
[CopyToGPU] Attribute for structs and consts
// AutoCopyToGPU, written by Eli Piilonen in 2020, MIT license
// Whenever your C# scripts compile, structs/consts/enums that you
// mark with [CopyToGPU] will be copied to a shader-include file.
// DO NOT put this file in an Editor folder! It will break.
///// C# Usage:
//
// [CopyToGPU]
@bgolus
bgolus / HiddenJumpFloodOutline.shader
Last active October 11, 2025 15:48
Jump flood based outline effect for Unity https://medium.com/@bgolus/the-quest-for-very-wide-outlines-ba82ed442cd9
Shader "Hidden/JumpFloodOutline"
{
Properties
{
_MainTex ("Texture", 2D) = "white" {}
}
SubShader
{
Tags { "PreviewType" = "Plane" }
Cull Off ZWrite Off ZTest Always
@raysan5
raysan5 / custom_game_engines_small_study.md
Last active October 26, 2025 23:01
A small state-of-the-art study on custom engines

CUSTOM GAME ENGINES: A Small Study

a_plague_tale

WARNING: Article moved to separate repo to allow users contributions: https://github.com/raysan5/custom_game_engines

A couple of weeks ago I played (and finished) A Plague Tale, a game by Asobo Studio. I was really captivated by the game, not only by the beautiful graphics but also by the story and the locations in the game. I decided to investigate a bit about the game tech and I was surprised to see it was developed with a custom engine by a relatively small studio. I know there are some companies using custom engines but it's very difficult to find a detailed market study with that kind of information curated and updated. So this article.

Nowadays lots of companies choose engines like [Unreal](https:

@bgolus
bgolus / StereographicProjectionBubble.shader
Created February 28, 2020 06:33
Modifying UVs using stereographic projection to create the illusion of a sphere.
Shader "Unlit/StereographicProjectionBubble"
{
Properties
{
_MainTex ("Texture", 2D) = "white" {}
_PanSpeed ("Pan Speed", Float) = 0.1
_Spherify ("Spherify", Range(0,1)) = 1
}
SubShader
{
@JarkkoPFC
JarkkoPFC / sphere_screen_extents.h
Last active May 28, 2025 13:51
Calculates view space 3D sphere extents on the screen
struct vec3f {float x, y, z;};
struct vec4f {float x, y, z, w;};
struct mat44f {vec4f x, y, z, w;};
//============================================================================
// sphere_screen_extents
//============================================================================
// Calculates the exact screen extents xyzw=[left, bottom, right, top] in
// normalized screen coordinates [-1, 1] for a sphere in view space. For
// performance, the projection matrix (v2p) is assumed to be setup so that