Normal to an implicit surface
How to compute the normal of a distance field (implicit surface) - 03/2018 - #Definition
Gradient rules
Multivariate calculus - differentiate expressions with nabla/gradient operator. - 01/2015 - #Definition
Just leaving some notes to differentiate expressions with the \( \nabla \) operator to compute gradients of various functions.
Contour lines
Also called iso-lines and level curves. - 12/2013 - #Definition
Introduction
To represent a 2D function \( z = f(x,y) \) one can draw a 3D surface. The higher the \(z\) value the higher the point on the surface (see above).
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