XNA SpriteBatch causing problems with BasicEffect -

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i'm using xna visualize data, , i'm trying use billboards data, , spritebatch hud text drawing.

for billboards, i'm using following example, works great: http://create.msdn.com/en-us/education/catalog/sample/3d_audio

in example, there cat , dog sprite, cat passes in front of or behind dog, depending on positions , camera position you'd expect. doesn't matter order cat.draw , dog.draw called in. these guys drawn basiceffect.

however if add class inherits drawablegamecomponent , uses spritebatch, basiceffect in other components loses it's depth sorting , quads drawn in order called. note component added game class via this.components.add(...).

is there incompatibility between basiceffect , spritebatch? problem occurs whenever spritebatch.begin()/end() called. if don't call cat/dog render fine.

any ideas?

you need reset renderstates spritebatch changes.

try setting these before basiceffect calls:

graphicsdevice.blendstate = blendstate.opaque; graphicsdevice.depthstencilstate = depthstencilstate.default;

more information render states spritebatch alters: http://blogs.msdn.com/b/shawnhar/archive/2010/06/18/spritebatch-and-renderstates-in-xna-game-studio-4-0.aspx


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