hello. there is
a plugin that works for CS:S. It works almost fine in CS:GO. However, there is a special case when there is an error.
Screenshot
Here predicted line is the one above, with white sphere at the end
The thing is that if velocity/ground angle is below 30 degree it works fine, but when its more than 30 deg the prediction works wrong as shown above
Chrisber from #sourcemod helped me a bit and decompiled the actual CS:GO function that calculates that stuff so in case you are interested I could share it.
Feel free to PM me