RenderTexture question

[Ockonal]

Thanks for the great reply!

I think, today I gonna suspend coding and learn more about coordinates, matricies, etc.
The only thing, transformPoint returns me coordinates like: (-0.68; 0.4), (-0.685, 0.477). I think they are in [-1;-1].

[Laurent]

The only thing, transformPoint returns me coordinates like: (-0.68; 0.4), (-0.685, 0.477). I think they are in [-1;-1].

Yes, sorry I forgot that. You need to convert these normalized coordinates to viewport coordinates, so this is a linear conversion from (-1, -1, 1, 1) to (0, 0, width, height).

x = (x + 1) * width / 2;
y = (y + 1) * height / 2;

Maybe you'll also need to invert the Y axis (y = height - y), I don't remember.

Sorry that you need this ugly hack to solve your problem.

[Ockonal]

Thanks Maybe you are going to add some another function inverse to convertCoords before sfml 2.0 release?

The new code is:

        sf::View *cam = prmDisplayManager->getCamera();
        sf::Vector2f size = cam->getSize();

        leftTop     = cam->getTransform().transformPoint(leftTop);
        rightBottom = cam->getTransform().transformPoint(rightBottom);

        leftTop.x = (leftTop.x + 1) * size.x / 2;
        leftTop.y = (leftTop.y + 1) * size.y / 2;
        leftTop.y = size.y - leftTop.y;

        rightBottom.x = (rightBottom.x + 1) * size.x / 2;
        rightBottom.y = (rightBottom.y + 1) * size.y / 2;
        rightBottom.y = size.y - rightBottom.y;

        std::cout << leftTop.x << "; " << leftTop.y << std::endl;

        sf::IntRect rect = sf::IntRect(leftTop.x, leftTop.y, rightBottom.x, rightBottom.y);

It almost works! Especially leftTop. But something seems to be wrong with rightBottom. Look at the video (I hope it won't be hard for you to look video taken from 2 monitors). In console you can see the std::cout I wrote in code (leftTop coords).

[Laurent]

Maybe you are going to add some another function inverse to convertCoords before sfml 2.0 release?

I don't know. If it doesn't break the API, it can be done later.

It almost works! Especially leftTop. But something seems to be wrong with rightBottom.

You must use the size of the target (the render-texture), not the size of the view.
If they are the same in your application, it won't solve your problem though

And, most important: who's that girl?

[Ockonal]

>And, most important: who's that girl?
I wish her to be my wife. But it's just a nice wallpaper

So, the bug has been destroyed! The problem was in sf::IntRect and and rightBottom width/global coords conversion.

Thanks!

[Ockonal]

And a small another problem: camera movement works fine but scaling doesn't . Maybe I have to look at something when I transform my points using camera?

[Laurent]

camera movement works fine but scaling doesn't

You scale what? And what's the result?

[Ockonal]

Oh man, sorry. The problem disappears O_o. Sorry for disturbing you.