never go full retard

ask port

shit stinks

If you set your horizontal velocity to "the distance to travel" per second then of course it's gonna hit the target in a second. But that's a very weird way to set things.

Now it depends on what you want exactly. You need to figure that out. I would recommend you to draw and post here different scenarios as you imagine it. What happens when The enemy and the character are right next to each other? Is there still a nice parabola? Is the shit thrown supposed to go slower horizontally in that scenario? What happens when they're far away from each other? Should the shit thrown go faster then?

You could choose to have a fixed horizontal velocity, then you'd have to sacrifice the parabola on short distances. You could choose to have a constant global velocity, then you need to shoot your shit really up high to keep a parabolic trajectory while still aiming at your character.

"If you set your horizontal velocity to "the distance to travel" per second"
The thing is I don't set the speed like that (X pixels/second). I just set x and y velocity. I have no idea where it will end in 1 second.
With yVelocity 1:2 gravity proportions it will always be 1 second - not sure why \o/

Here's some doodyly doo
https://dl.dropboxusercontent.com/u/876747/Wh...aimbot.png

https://dl.dropboxusercontent.com/u/876747/Wh...6a034j.gif

...I don't understand you.

You claim :

The thing is I don't set the speed like that (X pixels/second). I just set x and y velocity.

Then, on your picture :

xVelocity = distance

...

As for your actual problem... it would help if you described the behaviour you want instead of the one you currently have. Anyway, if you really want to aim correctly at the player, the thing that matters the most is that you follow this rule : travel time horizontally and vertically has to be the same.

Horizontal travel time is very easy to figure out :
HTT = xDistance / xVelocity

Of course I assume there's no deceleration effect or anything interfering in any way.

In your examples, the vertical position of the character and the enemy were always the same. If this is always true, then you can use this simple formula :
VTT = -2 * yVelocity / gravity
(with gravity being negative)

Of course these functions describe the movement in a continuous fashion. I don't know how your game works so I can't help you more than that with frame-rate dependence and stuff.

But with that, as long as both HTT and VTT are the same, your shot should aim at your target correctly.

You claim :

The thing is I don't set the speed like that (X pixels/second). I just set x and y velocity.
Then, on your picture :

xVelocity = distance

---
Okay, here it is.
xVelocity = distance is true only when the travel time is 1 second (game isn't frame dependent).
I randomly found out that this particular yVelocity:gravity ratio (1:2) will give me 1 second time. It's mysterious to me why it gives my 1 second.

So what if the yVelocity would be 400 and gravity 500?
Now I don't know how much time it will travel from originalY to destinationY, so I don't know how much xVelocity it needs to reach the target.

-----------------------------
retarded solution incoming (???)

VTT = -2 * yVelocity / gravity
VTT = -2* 400 / 800
VTT = 1 <- 1 second of flying, fuck ye
Changing some values
VTT = -2* 400 / 900
VTT = 0.88 <- in 0.88 second it will reach targetY position

Then I can use the xVelocity I would use for one second (simply the distance) and subtract 1 - 0.88%
???
didn't touch trigonometry or functions - such a weakling D:

All you would have to do in that situation is to replace HTT with 0.88 and calculate xVelocity from there.

HTT = xDistance / xVelocity

xVelocity = xDistance / 0.88

Also, make sure you know what you're doing when operating between floating point values and integers. Remember as well that this is only valid if the starting and target points are on the same level.

Should I use whole integers? : )))

)))

Thank you for your patience and deep math knowledge <3

U mah nigga <3

Deft Niggers, Project Gay and all Reborns combined. I'm stubborn and slightly retarded so I don't see what could go wrong.

Fuck im lolling so hard that ive got to fake it cause my work mates will realize im browsing the interwebs :D

ask thorin for help.

Registered: 17 Jun 2013

fuck this newbi shit

Avatar: heart

fuck this gay ass nigga <3

I dunno if you ever read this guys articles, some may give you some pointers: http://gafferongames.com/game-physics/

Thanks :)

if it makes you feel any better, i intuited all this without any instruction, except correctly when i was first programming games

that shit is racist

how do i math (c) pacman_pl