game engine perfomance

[onyx quail]

is there are some tips for perfomance of my game engine? (on sonsole shows delat in miliseconds "nano")

https://pastebin.com/2tSzaWtR

[ionic pike]

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[crude bloom]

Is there a specific performance issue?

[onyx quail]

in the "engine_update()", with 30 entities works faster but i want max 300 or more but causes lags by calculations

[crude bloom]

use a profiler for finding which pass is causing the issue

[onyx quail]

i looked it, a for condition for check all list of entities colliding

[crude bloom]

then you need to improve yourcollision logic

[onyx quail]

how i can?, there are others methods?

[crude bloom]

I don't know how you are doing it

[onyx quail]

"for (Entity entity : engine.entity_list)" this checks all entities rectangles, 30 are faster 500 or more cause lags

[crude bloom]

yeah that's the issue

if you check each entity with each entity, it will be slow

[onyx quail]

there are other method?

[crude bloom]

you could try to dplit your world in multiple parts

e.g. with a grid

[onyx quail]

a grid?

[crude bloom]

so your game has a 2D "world", right?

[onyx quail]

yes, but is not implemented

only with entities

[crude bloom]

so each entity has a position on the map, right?

[onyx quail]

yes

you can look the entire code in that link of the post

[crude bloom]

so you could split your map in let's say 16x16 parts of equal sizes

[onyx quail]

in the "entity.java"

[onyx quail]

yes, that will be implemeted

[crude bloom]

then you can have a list of entities in each of these parts

[onyx quail]

yes, is stored in the engine.java

[crude bloom]

note that if an entity moves from one part to another, you need to remove it from the list of the left part and add it to the list of the entered part

if you check collisions, don't check every entity

only check entities in neighbouring parts

[onyx quail]

with 5 entities:

engine update time: 10300
input update time: 1000
paint update time: 8100

with 60:

engine update time: 27100
input update time: 1000
paint update time: 13600

[onyx quail]

there are anoter method?

[crude bloom]

.

[onyx quail]

an abstract class, interface or some?

using threads on each entities blow up my computer

[crude bloom]

I told you - split up the world in parts and have one list containing each entity for each part of the world

[onyx quail]

ok

max each world can up to 10 entities for 60 fps

[crude bloom]

currently

[crude bloom]

with that approach, maybe more

[crude bloom]

if you have 10 entities and check each entity against each entity, you have to do 100 checks

with 100 entities, these are 10000 checks

[onyx quail]

ok

i will try