Inventory GUI design

[Preedak]

I'm designing a GUI for inventory system in my game. Right now, I'm using listbox as the way to select the item, but I've seen a work on Irrlicht that create GUI that look like a table that you can select the item by clicking,so

How can I create a GUI for selecting item that look like a table with the pictures of items to select from?

[Morrog]

You could always do a 3D approach.
Get mouse position
irr::scene::ISceneCollisionManager::getRayFromScreenCoordinates
to get a ray
irr::scene::ISceneCollisionManager::getSceneNodeFromRayBB
to get the node with which the ray collides (and hence the mouse is hovering over.)

And I guess you could put that on a 3D table with all the items on the table, or in a bag, or floating in space, or in a boat, or in a tree, or with green eggs and ham.

[preedak]

How about if I want to create new window IGUIWindow and put all the 3D objects on the created window? Is it possible?

[Morrog]

Hmmm....I don't know how to do that one, sorry
It's doable, but I don't know if Irrlicht can, and if so, how.

[preedak]

Doing it in 3D is a good idea, thank you. I may try that, but my mate have prepared some 2D images for the items already, so is there a 2D approach to the same thing?

[Robomaniac]

u can just arrange the images in a grid

[Preedak]

So I can just use "driver->draw2DRectangle(..)" to draw grids and then arrange the image file into each rectangle right. Then:

1> How can I select those images and let the game know that I'm selecting it?
2> I don't know why but my game crash it I load the same texture twice?
(getTexture then drop it, and later get it again)

[Morrog]

You're not supposed to drop a texture

And to see which image you've selected is pretty simple.
There's two ways. GUI items have a function to see if they are selected. Name doesn't come to mind, check the docs.

Second method is to take the mouse position and do some simple math.

[Preedak]

OK.