Hello again, I hate to keep opening and closing portal 2 to test trial and error flings. is there a way to predict how far or how high you go when flinging in hammer? Thank you for any help

It's so satisfying when you get a fling exactly right without tricks, but for whenever you want to do it simply, just have your fling surface, and have a trigger_catapult in front of it where the player will come out of. Set its minimum threshold and speed to something that will seem reasonable, so that the fling feels continuous (e.g. don't set the speed to 1000 and then have the player be able to fling with it when they're only going 250. Then just set the angle to whatever angle the fling surface is tilted at, play with speeds, etc. and it should work well eventually.

So I have to predict the speed? How do you know how far she's going?

Technically you don't need to perfect the distance for flings at all. Trigger_catapult can be used to make the player fling to a specific spot and changing the threshold so the player goes "at least this speed" to activate the catapult.

Thanks for the help.

Trigger_catapults are the exact same things that Faith plates use so if you think about it, everything makes sense.