Android really low performance on DrawNode rendering

cocos2d-x C++
#1

Hello,

I developing cross-platform game using cocos2d-x, few days ago I started porting it from iOS to Android and I saw really strange problem. I using DrawNode class to render some simple objects(like circles), my app gets really laggy on Android phones(I tested app on Huawei P8 Lite and Samsung Galaxy A5-16), on iPhone 6 there is no problem with that. Maybe somebody meet problem like that and know, how to solve it?

Thanks in advance.

#2

Can you show code, please? Are you batching?

#3

Is it a drawing app?

#4

My code of this functionality is really simple, I start from creating DrawNode object, next I draw on it using RenderCircle methods and at the end I push it on the screen by visit method in every frame. I wonder, how can I batch it in some way and create new circles only, when some status in app is changed. I know, that in cocos2dx v3 Sprite Is batched automatically, but I don’t know, how can I achieve that in DrawNode object? And why I don’t have similar problems in old iOS devices?

No, this isn’t a drawing app, this is a typical game.

#5

again, code, code, code. Describing what you are doing and what you actually coded can be to very different things. We can’t help on an assumption.

#6

I describing my code accurately, but if you really want code, I paste it below:

DrawNode *drawNode = DrawNode::create();
for (float i = 0; i < 10; ++i)
{
	if ((i < (*audioValue)) && (*audioOption))
	{
		texts->RenderCircle(mainRenderer, mainTransform, mainFlags, Color4F::ORANGE, posx + 80.0f + I*30.0f, posy + 35.0f, 10.0f, drawNode);
	}
	else
	{
        texts->RenderCircle(mainRenderer, mainTransform, mainFlags, Color4F::GRAY, posx + 80.0f + i*30.0f, posy + 35.0f, 10.0f, drawNode);
	}
}
drawNode->visit(mainRenderer, mainTransform, mainFlags);
#7

I recall there being a few GitHub issues about DrawNode performance where one of the engineers wrote some ideas on batching. I will see if I can locate them.

What is texts?

#8

texts->RenderCircle run method from different class:

void RenderCircle(cocos2d::Renderer *renderer, cocos2d::Mat4 transform, uint32_t flags, Color4F color, float posx, float posy, float radius, cocos2d::DrawNode *drawNode)
{
    drawNode->drawSolidCircle(Vec2(posx, (Director::getInstance()->getVisibleSize()).height - posy), radius, 360, 1000, color);
}

If you will found sth interesting about batching DrawNode, I really wait for info about it.

#9

I read that one should use as few DrawNode objects as possible. Instead of creating multiple DrawNode objects just use one DrawNode and draw multiple shapes.

#10

About that type of optimization I know and I use it now. When I don’t use it I get really laggy screen on iPhone, now on iOS run really smoothly, but on Android is some problem with it. I noticed, that method drawSolidCircle slow down application at most.

#11

Bump. Any new info about this problem?

#12

I will update GitHub issue and ask out engineering team to take a look at it

#13

Can you give a link to this issue on GitHub?

#14
#15

Thanks, but in this issue I don’t see any new things from more than year. This really breaks efficiency on Android phones.

#16

Please update it!