How to make small people like cities skylines?

Is it low poly 3d model , or 2d animation texture?

 

Why you don't check by yourself?

 

It looks like 3d model. When thousands of them walking around, why it dont have performance problem?

 

Firstly they have no colliders.
Secondly, they have texture GPU instantiation, or similar.
And sharing probably mesh and animation.
+ there is LOD involved as well.

 

Yes, as Antypodish said....no colliders, LOD, culling, and multi-threading are your friends in ANY game. Optimize, optimize, and then optimize some more. Nothing ticks me off more than a great game that runs like bantha poodoo.

 

There is YouTube series called “boundary break” where they take the camera to things in the distance. Usually models in the distance are either low poly versions of people or 2D sprites.

 

How do you size a suit? Do you guess what the individual wearing it may be like, and take lots of time to hem it before you ever see the customer?

No. You make it too large and hem it once you know exactly what needs hemming.

So beginners, please, don't get yourself overly-concerned with optimization before you have even built the game. It's just wasitng your own time.

 

How about pathfinding? thousands navagent ? No performance problem?

 

You would use a custom solution rather than navmesh. If anything, you'd probably just be using a fluid simulation and positioning people based on data from that.

 

If you want to see one possible way to approach having thousands of objects moving around in a very organized manner you will want to check out the Unity MegaCity demo at Unite LA. It's the latest showcase for ECS and the JobSystem.

Spoiler: MegaCity Introduction Video

 

Yep I love this presentation. I watched it it few times already.
Is amazing.

But unfortunately, ECS is not something easily reachable by beginner, without decent programming background.

 

But this is only because there are no decent tutorials yet. Otherwise it's easier than the OOD (to understand, everyone learned automatas at Math classes).

 

At higher school (equivalent college) I had something, if you referencing to Automaton Theory
https://en.wikipedia.org/wiki/Automata_theory
Not near in such form. And only because I had specialized college.
Even then, I don't use any of it in programming.

Thats true, specially when Unity ECS is dynamically evolving.

At least for now Unity C# OOP is quite nice and friendly, in comparison to Unity ECS.

But hope the scale will shift toward ECS soon-ish.
Until then, I wouldn't advise to start programming learning from ECS.

 

Wow. In Hungary I learned this in High School... that's why I thought that everyone knows what an automata is in Math. The DOD basically based on the same theory. Every System (in ECS) is an Automata you chain them together to crunch numbers. And basically you set the states with Components.

Whatever, it's not too useful then, I just thought I found something which almost everyone can recognize and relate to, because it was part of the Math, apparently not. Sorry about that. Anyway.

I'm pretty sure it will. I wouldn't start with OOP as of now if I were a complete beginner, I would start with DOD basics instead. Okay, maybe some very basic MonoBehaviours, just to be familiar with the basic component attaching stuff.

 

Not to worry. I finding flowing correlation.
Further East you go the better education primary-high school education. While toward west, further you go, weaker it is.
However, seams opposite in respect Universities. That is probably do to more practical opportunities in western countries.
Can not say much about colleges, but I would assume somehow overlapping.


Thing is, with current ECS, you still need OOP knowledge, as lot of APIs relies on it.
Or otherwise need solid mathematical background and time, to develop own for example collision system. Where most beginners wont have it.
Therefore, we got classic OOP, Hybrid and Pure ECS, to subsidies these holes.

If not for ECS and Job Systems I wouldn't be bother about DOD, while OOP provides very convenient referencing to objects. And got strings for naming, or even dictionary hashing
Yes yes, ECS dev team is working also on string system for ECS.