It doesn’t render anything. If I change 39 to 40 it magically works (or add bigger image, big enough can be even at 0, 0). I’ve discovered that if image right side is below a certain value it won’t render to the renderTexture. Y position and height doesn’t matter.
Why?!
I’ve also tested this with DrawNode instead (using drawDot to render a simple dot) and it works fine.
Director::getInstance()->getRenderer()->render(); is suggested, but removing it doesn’t help.
Testing image (0.png) is 28x33. I’m attaching it to this post.
I’ve launched my old class with the same code again, but called it on init() - it worked!
I’ve launched it using scheduleOnce() (5 seconds later) - still worked!
In the non-working case I’ve called it when clicked a button (ui::Button class) - it still didn’t work - but I’ve added scheduleOnce with 0.0 time and guess what - it worked!
That’s very strange, because I don’t think addTouchEventListener works on different thread. However, as you can see, running it on the next frame fixes the issue.
Then I’ve remembered - hey - let’s try default AppDelegate - and it worked! So I thought there’s something wrong with my AppDelegate. I’ve removed all unnecessary code and I ended up with pretty much the same. The only difference was the default designResolutionSize. Mine was 960x640, while default is 480x320.
I’ve created a new test project to show you how to reproduce this bug.
I haven’t looked at your new test project yet, but the “next frame” issue may just be due to the button event occurring before the render target save to file executes.
If so that’s not technically a bug, but more of a feature request, in the sense that it’d be working as intended, but is not the behavior you want? Or you just need to work within the behavior of the engine.
Anyway, I’ll take a look sometime in the next day or two, but will also watch this thread.
Strange. I tested the following changed code on iPhone SE, not an iPad, but still running iOS 12. I do believe with the code you had it did appear to not display with the top button (without scheduleOnce), but would display correct with bottom button (with scheduleOnce). However, I added and changed the test a bit to better display what’s going on and it appears to work fine with the following…???
I’m going to re-test your original code and do some further investigation.
void HelloWorld::runTest()
{
static int i = 0;
i = i + 1;
i = i % 20;
string filename = "test.png";
auto renderTexture = RenderTexture::create(300, 240, Texture2D::PixelFormat::RGBA8888);
renderTexture->beginWithClear(.5f, 0, .7f, 1);
{
float x = (i+1) * 10.f;
float y = 0;
auto sprite = Sprite::create("res/0.png");
//auto sprite = Sprite::create("HelloWorld.png");
auto size = renderTexture->getContentSize();
sprite->setPosition(Vec2(40 + x, 40 + y));
sprite->setColor(Color3B::RED);
sprite->visit();
}
{
float x = 0;
float y = (i+1) * 5.f;
//auto sprite = Sprite::create("HelloWorld.png");
auto sprite = Sprite::create("res/0.png");
sprite->setPosition(Vec2(40 + x, 40 + y));
sprite->setColor(Color3B::GREEN);
sprite->visit();
}
{
float x = (i+1) * 10.f;
float y = (i+1) * 5.f;
auto sprite = Sprite::create("res/0.png");
//auto sprite = Sprite::create("HelloWorld.png");
auto size = renderTexture->getContentSize();
sprite->setPosition(Vec2(40 + x, 40 + y));
sprite->setColor(Color3B::BLUE);
sprite->visit();
}
renderTexture->end();
renderTexture->saveToFile(filename, Image::Format::PNG, true, [](RenderTexture* rt, const std::string& str) {
CCLOG("str = %s", str.data());
});
Director::getInstance()->getRenderer()->render();
string testPath = FileUtils::getInstance()->getWritablePath() + filename;
auto texCache = Director::getInstance()->getTextureCache();
texCache->removeTextureForKey(testPath); //remove old texture from cache
static float offset = 10.f;
offset += 10.f;
offset = fmodf(offset, 200);
auto check = Sprite::create(testPath);
check->setTag(101); //use a tag
check->setPosition(Vec2(400 + offset, 200));
removeChildByTag(101); //remove old sprite before adding a new one
addChild(check);
}
Weirdly enough now I can’t reproduce the issue that we’ve discussed with the same project that I’m pretty sure I noticed the issue at least once or twice. **sigh**
Just spent hours trying to figure out what I was doing wrong, because the exact same issue was happening to me.
The top 800 or so pixels of the RenderTexture (2048x2048) would be blank, yet anything below that rendered all sprites perfectly. This was happening on a button event, even while calling Director::getInstance()->getRenderer()->render() as suggested in the code comments.
I did what @piotrros did, scheduled the creation of the RenderTexture with a scheduleOnce(), and it worked, so this work-around is good enough for now.
