[2.1] Creating 2D objects

[Jay721]

Hello, I’m looking for a way to create 2D rectangles on top of the screen that can be resized, repositioned and recoloured at any time. I know that there is Overlays in v1 Ogre, is this what I should use?

Also, I need to be able to add images on top of the screen too.

Thanks for reading

[Ybalrid]

The 2.1 samples are using overlays to draw text, and also, for example in the one called "ShadowMapDebugging" to show textures on top of the screen. I never looked into it, but it is definitively possible to use the overlay component in Ogre 2.1

[hyyou]

Here is a one of possible ways to do it:-

I create a dedicated render queue for it (e.g. 8th render queue) in compositor.

Code: Select all

pass render_scene
			{
				//meaning: draw 2D as popup
				execution_mask			0x02
				viewport_modifier_mask	0x02
				rq_first	8
				rq_last	9
			}

I need to mark the 2D Ogre::Item(s) to be visible only in the ortho camera (using execution_mask and viewport_modifier_mask).
For more information, see stereo-camera demo in the official repository.

Then I create a new ortho camera + viewport, and assign a 2D mesh (4 vertex plane) to Ogre::Item.