What you have posted is a Solidworks tool box Gear. Not very good... in fact BAD.
(Only good for a graphical representation of the Real Thing)
Tool Box gear = GREEN
True Involute Tooth Form = RED
Attached here is, what I will call, the "Robust Involute Spur Gear Generator - Better 02.SLDPRT" The RED gear
using this file and only changing a few of the equations values yields a gear that is very close to the one you posted from the tool box.
You posted a 16 tooth, 20 deg pressure angle gear. It has a pitch diameter of 24mm thus a Diametral Pitch of .6666 (No Teeth/Pitch Dia)
This will give you a true equation driven involute tooth form.
Should your model work for Modular gears? Or is there another version? I tried to create a 0.4MOD x 10 tooth gear & it came out very, very small. 0.18mm outside diameter when it should be 5.2mm. I used a conversion table to give me the DP which worked out to be 63.5950 for 0.4Mod.
Edit: Figured it out.....had to change my Unit system to inches
Cheers & great work.
Oh thank you, it is exactly what I want. I know that the tool box is very bad. I was looking for the equation.