Question about the screen bounds

General Discussion
1

Hello there. I’m attempting to create a main menu for my game. I’ve began using Panda3D since few days ago. And I have two qeustions:
1.) I’ve seen that the final position is inconsistent, by that I mean that the button is not correctly positioned when using having a maximized window, or using a window with the default size. Is this a bug, or intended behiavour? If yes, what are the default bounds, and how should I attack a button to the 2D screen renderer?

void _attachButton(NodePath* n2d,PGButton* button,const LVector2f& pos)
{
NodePath defbutNP = n2d->attach_new_node(button);
defbutNP.set_scale(0.05);
defbutNP.set_pos(LVecBase3(pos.get_x(),0, pos.get_y()));
}

2.) Is there a way to place 2D items with pixel coordinates? Like placing a image at (0.5 * ScreenX, 0*5 * ScreenY) That would be a great workaround for my issue.

Looking forward to some answers. Thank you!

2

By default, the interface has the parent element aspect2d, but if you change it to pixel2d. Then you can use it exactly like this.

1 Like
3

I’ll try this out. Thanks for your time!

4

It seems now you can just make a call to get_pixel_2d to get the measurement in pixels.

https://www.panda3d.org/reference/cxx/classWindowFramework.html#ad2f2c46dd563331b3e1052e962cb8a9d

1 Like
5

Oh, that’s so much better! Question: Does pixel2d use the LVector2i numerical type? Does it matter if I use LVector2i or LVector2f?

6

Logically, it should be Int.

7

I’ve seen implementations with floats, taking Monogame for example…

8

As far as I know, you can use Float.

1 Like
9

I believe that one can, indeed: the space used by pixel2d is just the same as any other in Panda.

However, if you want to place things at pixel-coordinates, then integers would likely make the most sense, I think, as they would correspond to non-fractional pixels.