Portal 2 Mathematic calculations...
Hallo People!
I have a question about some constants used in portal 2.
I see now that Portal 2 has a gravitation of 600 units /s2
What is the air friction in portal 2?
What is the ground friction?
What is acceleration of catapults (or faiths)? Have catapults some other forces or tolerances? How I can control it?
What is acceleration (or just the speed) of the orange gel? What acceleration make blue gel if you fall on it and bounce?
How much weigths cubes, turrets? All sort of cubes and turrets. Is it in Kilogramm or in some other freak unit?
What is the speed of transportation in "Tractor Beam"?
Does the portals on the portalgun have friction if you past ideally by?
Many question 
But if you answer me for the first only what acceleration has the catapult I would be very happy. )
Thank you very much!
Have a nice day!
Hello!
Most of those I don't know about, but cubes weigh 40 kilograms, and orange gel, faith plates, and tractorbeams are customizable. I believe that tractorbeams have a default speed of 250 units per second, and faithplates an impulse of 450 units per second squared times one timestep (modified slightly to hit whatever they're targeting).
Thank you very much! I was for hours trying to calculate a faith to hit at right position, but I failed. Something is wrong with units. Or there is a one force more. Or just my calculations..
Sorry the impulse is in Units/s2 or just units/s ? is it acceleration or just the speed?
Impulse being a change in momentum, so kilogram-distanceunits per timeunit (or force*time in other words). It's 450 somethings, but VALVe seems to have stopped putting proper units on things. They call it "speed," but it doesn't make everything go the same speed. It varies by mass, like a force or impulse should.
And while setting up a faith plate with precise physics calculations is awesome, you can just place an info_target and set it as the plate's launch target. I think VALVe added it when the level designers were getting too frustrated. 
))
This is exactly my problem...
I have very small room. On one side faithplate on other tile for a portal. You can make the portal only in one position no matter how you shoot.
I want to make the player like a bullet to fly out of the portal and pass areas that you cant reach with other ways.
The faithplate has 5000 as speed or what it is.. If I make a info_target player flyes like crazy very far over the tile no matter how I configure other settings in trigger_catapult.
You can make it with slow speed, but it is not what I want )
One question more how much weight the player? or better saying Chell?
It's generating a parabolic path as close to the firing angle as possible to hit the target, and with a high speed the parabola goes way high up. "Use Exact Velocity" is your friend here, switch Solutions if it doesn't work.
Thats because I want to calculate, Use of "Exact Velocity" dont work. Thatwhy I need some numbers. Like how much weight chell. Maybe I can do it this way. Can you maybe say where I have to search? I know there is some definition txts where is all all what about weights. The portalgun is for example 4 Kilo.
I cant find the txts for chell or player. She is falling because of that she has to have some weight, but is there something open for us??
I'm not sure. Try using a filter_activator_weight, or ent_fire !player RunScriptCode "printl(self.GetMass());".
I haven't read the whole thread but it looks like this side would be of interest to you: