The images below demonstrate the use of triangular footwork and pekiti tirsia sidestepping with the basic 6 angles we use in FSD. I'm using what I call the 4 Step Matrix, demonstrating covered entries with angles 1 through 4.
The pekiti tirsia sidestep is unique in that it allows for very close range striking while moving offline. Unlike most attacks done after a weight shift, 80% of your weight is kept on the rear foot when striking off the PT sidestep. You'll find video of this footwork and much more on my stick and sword page.
See more functional kali / eskrima footwork and stickwork: