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DarkBASIC Professional Discussion / Transparent 2D rectangle

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Jambo B
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Posted: 5th Mar 2011 14:33
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Hello

I wonder if you can help. I'm using the D3D commands to draw 2D text over a 3D scene. I'm trying to draw a transparent box over the top of the D3D text to get a clear 'window', into which I'm drawing some more text.

Er, that sounds confusing! Please take a look at the image to see what I mean.

Any ideas how I can do this?

Thanks for any help.

James
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TheComet
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Joined: 18th Oct 2007
Location: I`m under ur bridge eating ur goatz.
Posted: 5th Mar 2011 14:45
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The Advanced 2D Plugin allows you to draw transparent shapes. if you wanted a transparent red box, you'd type:

a2fillbox x1,y1,x2,y2,0x80FF0000

The first byte in the color value defines the transparency (FF for no transparency, 00 for full transparency. I chose 80 in this case). The next 3 bytes are the rgb values, so FF for full red, 00 for no green, and 00 for no blue.

TheComet

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Jambo B
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Posted: 5th Mar 2011 15:01
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Hi TheComet

Thanks for the quick reply. Downloaded that plugin - great, isn't it?

Unfortunately, it didn't solve my problem. The D3D_text was still visible through the transparent shape. I was hoping the shape would wipe out the 2D text.

Cheers anyway tho
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IanM
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Posted: 5th Mar 2011 16:12
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So you don't actually want a transparent shape, you want an opaque shape? Then set the alpha level to ff instead of 80:

a2fillbox x1,y1,x2,y2,0xFFFF0000

Get the latest Matrix1Utility plug-ins (23-DEC-2010)
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Jambo B
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Posted: 5th Mar 2011 17:08
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Sorry, I'm not being clear... too much beer last night

Let me try it like this... imagine you wanted to draw a large polo mint in the middle of the screen with 2 circles - a white one, then a clear one in the middle. How would you draw the clear one so that you could see the 3D environment through it?

Cheers!

James
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BatVink
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Posted: 5th Mar 2011 17:44
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That would be 4 polys to make the border, or you draw the shaped border you want to a bitmap and make an image from it. (SET BITMAP FORMAT 21 to make it transparent)

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Jambo B
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Posted: 5th Mar 2011 19:31
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Hmm, never played with SET BITMAP FORMAT... I'll have a go with it.

Thanks as always to everyone for your help. Great bunch of folk on here
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