Gravity (Highjumps)

Some weeks ago i made a simple map to do some simple research about why it is so hard to make a longjump (or a regular jump) that is positioned very high from the ground. Jumps similar to the one at the beginning of kz_man_ultrablock, the 238 jump at kz_xj_3ways, the lj after the 235 on in_extreme and that jump in the 2nd room of kz_man_halloween with a 1 unit thin ledge to your right.

Map:
http://rapidshare.de/files/25999586/gravity_research.rar.html

Some info:
If a jump is positioned less than 70 units (0 to 69) from the ground - the gravity is normal.

If a jump is positioned more than 69 units (70 to X) the gravity changes, and it becomes much harder to make a regular jump or longjump. Your strafes gets very wierd and you cant control your player as good as you can on lower jumps. Your movements feels very heavy, like you are jumping with sv_gravity 1000.


If you place two brushes/shelfs at the height of 1000 units. Make the gap between them 225 units and try jump it. Due to its height of 1000 units, down to the ground, the gravity plays tricks with you - and the jump feels like +240units.

If u now use the same jump, but you create a shelf below this lj. Place is somewhere in between 0-69 units below the lj. Make it cover the whole gap (between the two shelfes). And now try to jump. Piece of cake! - Cuz the gravity now is normal, even though there is still 1000 units to the ground. But the shelf you put below the lj worked like magic.


I have no answer of why the HL engine is made this way. Im convinced its only some crazy bug, because i cant understand its purpose.

Wasnt actually gonna post this thread(/and map), but i thought someone might be interested, and maybe many mapmakers didnt know this either.

And no complaints on my map. Its ugly i know :)

-------- EDIT --------
A trick to make these jumps easier is to jump much earlier than you would if there would be a regular (non-high: 0-69) longjump.

What i mean by that is:
Instead of jumping at the very edge you should lift like 10 units before the edge. This demands you to change your longjump technique slightly, but when you get a hang of it high longjumps will be much easier. Of course a 220 will be like ~230 if you jump earlier. But its still much easier imo.

If you jump like this your first strafe will not be affected by the gravity. And its the first strafe that will be very heavy if you'd jump from the edge.

So jumping a 224 high-lj like on in_extreme (and kz_cg_extreme) with this technique will be easy with only 1 strafe (+prestrafe)

Try it out and see for yourself :)


--- Edit #2 ---
I changed the subject name, and suddenly the thread fell out of the "sticky".



[ Edited ]

the hardest high long jump in all of kz is the 238 at the end of kz xj 3 ways, when the floor is not broken its easy i can knife it but when the floor breaks i can only scout it after 20 tries. i awlays wondered why that 238 was so hard when theres no floor :|

wow...great job...but i also have a few questions regarding circle strafes...are they as effective as regular strafes...and how exactly do you do them because i've tried but im not sure if i'm doing it right...i would like to learn because they feel more comfortable to me as opposed to regular strafes

Spaceman Spiff, no, Alts!cH would never use circle strafes. He thinks they're gay :p

I dunno about this circle strafing thing. I can't see any reason why they would be better than regular strafes...

I also think that the circular strafes are better for highjumps ... i do the nuke rock to rock longjump with like 3 circular strafes and 5 normal ones ... i also do jumps like the sc @ cg_industry way easier with circular strafes
btw hanniball is a gewd circular straf0r ;)

w00t this why the world needs geeks and nerds
no offense thopa :P i am a nerd too, but not in this kinda stuff lol

i always thought that the textures and the friction of that ones were the responsables of make that kind of jumps, harders... very nice job thopa

I think: Circular strafes are easier to cordinate your mouse with your keyboard, 'cause you have to change the strafe key exactly when you change your mouse direction, with the circles the direction change is less violent & maybe you can cordinate better your fingers this way

you're right InseN... I like normal strafes :P

great job thopa,thanks a lot for this useful info :)

Normal strafe ftw... just cant get the hang of the circle strafes... :E