XNA: Draw Bounding Box around Sprite

Question

I'm just starting with XNA and I wanted to draw Debug Lines around my Texture/Sprite to help me.

Is there an easy way to do it with SpriteBatch? I haven't used the GraphicsDevice yet to draw....

Thanks!

Just google search draw lines spritebatch... Basically it works by streching and rotation 1x1 texture — Kikaimaru
– Kikaimaru, Commented Apr 25, 2012 at 17:03
so i have to add a 1 pixel texuture to my content? Is there an easier way perhaps? — Setheron
– Setheron, Commented Apr 25, 2012 at 17:04
You can dynamicaly create it when creating spring batch (i have subclass SpringBatchEx), new Texture2D() then SetData and set white color, it will be in some of google results :) — Kikaimaru
– Kikaimaru, Commented Apr 25, 2012 at 17:05
Me and a friend have made an open-source project that helps with drawing lines, rectangles, and other "primitives" in XNA: bitbucket.org/jcpmcdonald/2d-xna-primitives/wiki/Home — John McDonald
– John McDonald, Commented Apr 25, 2012 at 17:20

Kikaimaru · Accepted Answer · 2012-04-25 17:06:49Z

http://www.xnawiki.com/index.php/Drawing_2D_lines_without_using_primitives

I would suggest to create subclass of SpriteBatch that would have DrawLine and DrawRectangle function and in constructor create 1x1 texture.

Im testing out that method but doesn't work.. need to investigate — Setheron
– Setheron, Commented Apr 25, 2012 at 17:37

OriginalDaemon · Accepted Answer · 2012-04-25 18:36:31Z

Check out this forum post in which the poster details how he is making spriteBatch draw in wireframe mode.

Basically you just need to change your draw code to this;

spriteBatch.Begin(SpriteSortMode.Immediate,BlendState.Opaque); RasterizerState state = new RasterizerState(); state.FillMode = FillMode.WireFrame; spriteBatch.GraphicsDevice.RasterizerState = state; spriteBatch.Draw(sprite, position, Color.White); spriteBatch.End();

And obviously change "spriteBatch.Draw(sprite, position, Color.White)" to be a loop drawing all of your sprites.

doesn't seem to show me anything, but maybe my Rectangle for my sprite is out of screen.. — Setheron
– Setheron, Commented Apr 25, 2012 at 18:49
Maybe, just try rendering with the line ...RasterizerState = state; commented out. Then you should just be rendering as normal. — OriginalDaemon
– OriginalDaemon, Commented Apr 25, 2012 at 20:04
The most important thing, basically, is to use SpriteSortMode.Immediate and spriteBatch.GraphicsDevice.RasterizerState = FillMode.WireFrame; The rest of your rendering code should stay the same. — OriginalDaemon
– OriginalDaemon, Commented Apr 25, 2012 at 20:05

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