Teeworlds - development

On water physics (what is possible with tune zones, I've used 5 tune zone types on this map each with a different gravity) (edited)

Looks sorta off, it's like the tee can't decide it's density

uh, I could remake my gravity mod with tune zones

11:46

I had a problem there, that the floating point precision wasn't good enough and some physics calculations needed to be doubles, because orbit dynamics are just error prone

@Assa are you the author of watermod?

12:01

I have been inspired by that.

12:02

Looks sorta off, it's like the tee can't decide it's density

@Learath2 there are streams of underground water and streams of falling water. Have you noticed that?

I've used total of 5 tune zones to create it. Would for you that feel less off and consistent with only one tune zone with gravity=-0.2?

12:04

On that map there have to be horizontal streams too, but that cannot be achieved with tune zones alone as we don't have a vector for gravity.

@Assa are you the author of watermod?

@Deleted User no?

I am not sure why there is a question mark

On that map there have to be horizontal streams too, but that cannot be achieved with tune zones alone as we don't have a vector for gravity.

@Deleted User we have? (0, -0.5) usually

can't set the x component though

12:09

via tunes

I mean vector and scalar forces as in physics.

12:09

Yeah, thanks @heinrich5991 that's it.

Wait for 0.8

12:10

I am sure a code wizard will make it great

i always mix up horizontal and vertical forces ...

Gravity is vec2(0, x) actually in game. So you cannot give a horisontal momentum to objetcs with it.

12:11

But also friction seems to be opposite: it's not working for vertical movement at all.

The velramp also only applies to horizontal velocity iirc

Yeah, found it out a hard way

you're changing the code anyway, right?

12:13

why not add a horizontal gravity tune?

@Deleted User the separate streams weren't too obvious, except for the large waterfall. Still seems a little off to me, it's that large oscillating motion inside the water that throws me off

pls don't add a vertical gravity, add maybe a different variable but don't call it gravity

a gravity direction tune?

why not add a horizontal gravity tune?

and a vertical friction please

12:15

@Assa you're right it should not be called gravity I think. Though I can imagine an object with magnetic force in game.

O

12:16

Magnet would be cool to have

I was considering experimenting with a more traditional drag force, but in the end I decided against it. The physics of teeworlds are it's most successful part

12:16

The physics just feel right

it's that large oscillating motion inside the water that throws me off

Yeah, I don't have vertical friction to reduce this effect. Tried to add surface zone with a lower gravity value but tile is too big to dampen anything.

The physics just feel right

@Learath2 mostly, except hook and player collisions

Honestly? The hook feels amazing

*player hook

It's completely unreal but you just feel so powerful using it

They're not magic. Those are 2rn level quadratic equations. They're not holy cow.

As in hooking other players? What's wrong with that?

strong hook/week hook shenanigans for example

The complexity of the math doesn't matter at all. It's about the feeling

Sure we could add effect to physics leaving most of gameplay the same.

12:18

It's not altering reality it's changin one hacks for another, more eloquent.

@Assa weak/strong is more an effect of the physics being applied inconsistently/naively. If you apply it equally to everyone, it'd be gone

@Learath2 feeling can be preserved with the right coefficients and rules.

12:18

but will give an opportunity to expand the thing

12:19

you can make tune_zone 0 values as usual

then it feels like the hook targets a bigger playerhitbox then the collision box, but this might be intended

zero vertical friction and no horizontal drag

12:19

it's not that everything will fall apart (edited)

With the options you propose yeah, we can simulate this behaviour. I was looking into a much more realistic application of friction

friction formula is still very simple

12:20

how more realistic you wanted it to be?

12:20

it's still quadratic isn't it?

I still don't get how the order/type of the equation matters at all

1

me neither

I just know what is linear and what's second order. And that's all I need for a game physics

Currently we apply drag only on one axis. I wanted to apply it to the velocity vector of the tee. With a single coefficient, that way you can't really simulate the old behaviour

12:22

but it would feel more "real"

I see

I'd be very careful about changing those mechanics

so you just neglect vertical component of a drag, or just add it to horizontal rn?

@Stiopa exactly why I decided against touching it at all, the physics already feel great to me

12:23

@Deleted User currently, there is no vertical drag at all

12:23

drag is only applied to the x component of your velocity

but hook drag is fully vector?

Well, different uses of the word "drag", no?

ah maybe

12:24

but I get the second meaning too

When you hook someone you "drag" them towards yourself. Air "drag" is the force that counters your movement in air (edited)

just when you drag a character in angle of 45' you're giving him vertical and horizontal... momentum, right?