Physics Library

Gradient Lab

∇f = (fx, fy) · Duf = ∇f · u

Scalar Surface

Ascent tangentDirection tangent

Level Sets

∇f directionUnit uNormalized arrows
Field value f
Gradient ∇f
Magnitude |∇f|
Directional slope

Section Along u

f(p + tu)Tangent at p

Directional Derivative

DufDirection angle (degrees)
|Duf| ≤ |∇f|