Flickering issue

[edwinsyarief]

Hi All,

I've implementing a simple Entity-Scene-Component structure. But I've one issue, when rendering image, using imagecomponent, the result is flickering. You can see at the project here:
https://github.com/edwinsyarief/supershootergame

Please help me, I'm new to golang also ebiten, maybe there is a peformance problem at my structure?

Thanks a lot.

Best Regards,
Edwin

[hajimehoshi]

I tested this project and saw a static text. I didn't see flickering.

[hajimehoshi]

Is ComponentRender called every frame?

[edwinsyarief]

Hi @hajimehoshi ,

Yes, it is called from Draw function. But it will check every draw frame if component is visible, it will be draw in screen

[hajimehoshi]

I suggest you create a minimized case to reproduce the issue by reducing the code in your ECS.

[edwinsyarief]

Hi @hajimehoshi ,

I've found the problem, here is the thing happened:
At the loaderscene there are one renderer and two entities, which each entity can contains components.
first entity - has image component 1280x720 (black)
second entity - has image component 320x180 (white)

At game->render() function:
loop renderer in scene --> loop entities in scene --> loop components in entity --> screen drawImage

Is there any other way to optimize so there is no flicker, I have a reason why I made the structure like above. I just port my previous .NET ECS into golang.

I'll appreciate a lot if you have any suggestion how to optimize this.

Thank you.

Best Regards,
Edwin

[hajimehoshi]

I have no experience about ECS so I don't have a good insight about this.

Ebiten's screen passed via Draw is cleared every frame, then you have to draw everything you need in one frame at the frame once.