Skip to content

Instantly share code, notes, and snippets.

@romainguy
romainguy / d_ggx.glsl
Last active October 26, 2023 06:18
D_GGX in mediump/half float
// From https://github.com/google/filament
float D_GGX(float linearRoughness, float NoH, const vec3 h) {
// Walter et al. 2007, "Microfacet Models for Refraction through Rough Surfaces"
// In mediump, there are two problems computing 1.0 - NoH^2
// 1) 1.0 - NoH^2 suffers floating point cancellation when NoH^2 is close to 1 (highlights)
// 2) NoH doesn't have enough precision around 1.0
// Both problem can be fixed by computing 1-NoH^2 in highp and providing NoH in highp as well
// However, we can do better using Lagrange's identity:
@teocomi
teocomi / .gitignore
Created September 13, 2016 15:01
Gitignore for Unity projects
# =============== #
# Unity generated #
# =============== #
[Tt]emp/
[Oo]bj/
[Bb]uild
/[Bb]uilds/
/[Ll]ibrary/
sysinfo.txt
*.stackdump
@dergachev
dergachev / GIF-Screencast-OSX.md
Last active April 1, 2025 01:48
OS X Screencast to animated GIF

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Screencapture GIF

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application: