Using a texture to guide initial particle rotation (via radial gradient)

I don’t see rotation as an influence for textures.

I was hoping to use the radial gradient for this.

black being 0 degrees, and white being 359.999 degrees.

That way, I could have these radial gradients pocketed in procedurally generated “cells”, (the voronoi cell wall producing “roads” and internal cells where houses are, trying to procedurally generate a medieval city, with its more web-like road systems.

The challenge is to get the houses facing the correct direction from inside their funny shaped city blocks. A radial value inside the voronoi cells (the city block) could map out the direction they are supposed to face when spawned.

I am kind of surprised it is not there.