One Introduction to Fibonacci Numbers http://www.buygoldco.com/introduction-fibonacci-numbers/
The visualization software allows one to "Add Borders." Consider "Borders" as a surrogate for "Constraints."
The Set Up
Three and Five points. Both are Fibbonaci Numbers
Figure 1. No Constraints 2 d view.
Figure 2. No Constraints one 3d view.
Figure 3. Constraints 2D view.
Figure 4. Constraints 3d View