Issues with text vs sprite depth

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Satchmo

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Posted: 9th Jan 2016 20:50 Edited at: 9th Jan 2016 20:51

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Hey Guys,

Is there any particular way to get text to appear behind sprites? It seems like the set text depth command is not actually having any effect. With a sprite depth of 1000 and a text depth of 5000 the text still appears in front of the sprite. Note that I am using the draw sprite command, not sure if this affects anything or not.

Thanks

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Paul Johnston

TGC Developer

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Posted: 11th Jan 2016 16:14

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The depth value is used by the rendering engine to sort sprites and text into the correct order for drawing, it doesn't use a depth buffer for 2D, which would enable drawing in any order. By using DrawSprite and then calling Sync the rendering engine would draw the text over the sprite (and possibly draw the sprite again unless you have made it invisible before calling Sync). To draw the sprite after everything else you can split Sync into its component parts Update, Render, Swap, and placing your call to DrawSprite in between, like so

+ Code Snippet

Update(0) // update animations
Render() // draw everything to the screen
DrawSprite(ID) // draw the sprite after everything else
Swap() // show the screen to the user

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dooz

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Posted: 12th Jan 2016 03:15

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Quote: "The depth value is used by the rendering engine to sort sprites and text into the correct order for drawing, it doesn't use a depth buffer for 2D, which would enable drawing in any order. "

If this is the case, why have a "SetText/SpriteDepth" function? I'm having the same trouble with text over sprites, etc.

This function should force the rendering engine to draw in the specified "Depth" as per calls to the function. If you don't call it, then they should be rendered in order of creation, with latest on top, or as specified by other function, e.g. Set...Transparency, etc.

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BatVink

Moderator

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Posted: 12th Jan 2016 07:28

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Quote: "If this is the case, why have a "SetText/SpriteDepth" function? I'm having the same trouble with text over sprites, etc."

Because if you simply Sync(), then they are drawn in the specified depth order.
Satchmo is using DrawSprite(), so these are drawn first, followed by everything else during the Sync() afterwards.

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