2 rendertarget onto one Spritebatch?

1

I know that this seems weird, but I need (or I think I need) to do this for a reason.

In my game, I make a zoom in the screen for “recreating” the advancing sensation in a dungeon (first person 2D game). The problem is, I want to make a HUD with a minimap, health and that info, and if I make zoom, it will zoom the entire screen.

What I want to do, is to have a RenderTarget for the scenario (dungeon), and another for the HUD, and then show it together in the sprite batch. Is this possible?

2

Yea, draw each stuff to both render targets.

spriteBatch.Begin()
spriteBatch.Draw( // RT one)
spriteBatch.Draw( // RT two)
spriteBatch.End()

That is a simplistic scenario if I understand right you may want to zoom the rt one but not two. I am not 100% sure but something like this may work

spriteBatch.Begin(cameraTransformation)
spriteBatch.Draw( // RT one)
spriteBatch.End()

spriteBatch.Begin()
spriteBatch.Draw( // RT two)
spriteBatch.End()
3

Pasted image1600×900 205 KB

It seems that I can’t do it that way ó_o

Pasted image1025×97 3.56 KB

4

What is null, the RT or the screen rectangle on the second run?

5

AH, I didn’t say nothing. I wasn’t initializing the rendertarget properly.

Now it works perfectly!

1 Like
6

Nice one,

Do you just apply camera transformations to the first RT then?

7

Yup, as I only wanted to make zoom on that concrete RenderTarget.

8

Nice one glad it works as simple as that lol, at some point I will be doing the same. (well similar, 2D side scroller with hud/map)