RenderTexture ContentSize Error about axmol

[rh101]

Try renderTexture->getSprite()->getContentSize().

It is a little strange that RenderTexture content isn't set at creation, but if that were to be implemented, it may impact the positioning of the internal sprite, since it's a child of the RenderTexture. If the content size of the RenderTexture were to be set, then the position and anchor point of the internal sprite would need to be modified in order for it to be correct (and not break existing usage).

[asnagni]

@rh101 Yes, I found that very strange and I step in the code to try to figure out what was the problem but defiantly it is not working. I could find a place where the value was set.

Doing this: renderTexture->getSprite()->getContentSize()
Will work but it is not intuitive and it doesn't fallow the rest the API pattern. I think this issue is not a high priority issue but it would be nice to have a clean interface. It's not intuitive to do this to get the size.

What do you think?

[rh101]

Will work but it is not intuitive and it doesn't fallow the rest the API pattern. I think this issue is not a high priority issue but it would be nice to have a clean interface. It's not intuitive to do this to get the size.

What do you think?

This is possible, but as I mentioned earlier, the internal sprite would need to be adjusted to ensure it is still drawn correctly.

So, in this method:

bool RenderTexture::initWithWidthAndHeight(int w,
                                           int h,
                                           backend::PixelFormat format,
                                           PixelFormat depthStencilFormat,
                                           bool sharedRenderTarget)
{
    AXASSERT(format == backend::PixelFormat::RGBA8 || format == PixelFormat::RGB8 || format == PixelFormat::RGBA4, "only RGB and RGBA formats are valid for a render texture");

    bool ret = false;
    do
    {
        _fullRect = _rtTextureRect = Rect(0, 0, w, h);
        w                          = (int)(w * AX_CONTENT_SCALE_FACTOR());
        h                          = (int)(h * AX_CONTENT_SCALE_FACTOR());
        _fullviewPort              = Rect(0, 0, w, h);

        setContentSize(Vec2(w, h)); // <<< set content size here

...
        setSprite(Sprite::createWithTexture(_texture2D));

        // !!!! Ensure sprite is displayed at correct coordinates anchoring bottom left.
        _sprite->setAnchorPoint(Vec2::ZERO); // <<< ADDED
        _sprite->setPosition(Vec2::ZERO);  // <<< ADDED
...
}

Also, we can anchor the sprite to middle if that is preferred:

_sprite->setAnchorPoint(Vec2::ANCHOR_MIDDLE); // <<< ADDED
_sprite->setPosition(_contentSize / 2);  // <<< ADDED

RenderTexture::getContentSize() will then return the correct size.

@halx99 Is it reasonable to set the RenderTexture content size and make the above changes to the internal sprite so it is drawn correctly? If so, which is the preferred anchor point of the sprite, 0,0 or middle of render texture?