(by @andrestaltz)
If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.
// 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: |
(by @andrestaltz)
If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.