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Dark GDK / Basic 2D: Displaying a circle, Need help.

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Lee Aby
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Posted: 26th Jan 2009 13:01
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Hi all,

I am trying to draw a circle and display it on the screen. I am using the function dbCircle() to draw the circle. However no circle is drawn on the screen and I always get a black window. I have inserted the dbSync() in the main loop.

Here is the code I tried:


Please help me understand what I missed.

Thanks a lot
Lee

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Lee
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Matty H
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Posted: 26th Jan 2009 15:01
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Try putting dbCircle() in the main loop so it is drawn every frame.
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Lee Aby
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Posted: 26th Jan 2009 15:14
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I have tried that too but I am only getting a black window

I have tried the Tutorial to display Hello World which says about function dbSprite() to draw the image from memory to screen. Is that the issue? If so, what argument I should pass as the ID?

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Matty H
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Posted: 26th Jan 2009 21:24
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I have copied and pasted your code into a 2D project (pasted over existing code) and it works fine, I get a red circle in the top left hand corner on a black screen.
So, I have no idea why this is not working for you, sorry.
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CheatCat
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Posted: 27th Jan 2009 09:49 Edited at: 27th Jan 2009 09:50
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Try dbCLS(); after dbInk();
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Lee Aby
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Posted: 27th Jan 2009 17:16
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Thanks for all your help. But I am still unable to get that circle drawn.

matty - Earlier I was trying it on "Dark GDK - Game Template", and I tried it now on the 2D template too. The code that came when we start a 2D Game works fine and I get the proper animations displayed on the screen. But with my code to display the circle it is still displaying only a black screen:-(

CheatCat - I have tried that too. The screen is always black even when I change the background color.

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Matty H
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Posted: 28th Jan 2009 18:44
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O.K Ive done a little bit of testing.
dbInk() will not affect the background colour, I think it is refering to ink background, you know the way, like in paint(windows) were you will have a foreground and a background ink colour.

This should turn your screen green:


As for not seeing the circle, this is strange, all I can think of is that your monitor settings are making it hard to see, red is hard to see on black background.

Let me know how you get on.
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Lee Aby
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Posted: 31st Jan 2009 07:59
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Matty -

I could set the background color after including the dbCLS you mentioned. Even then I am not getting the circle. I was thinking if for some reason, the ink color is not getting changed, the circle displayed might be in the background color itself. Is there a function to read the current ink color? I did not see one in the current GDK documentation. Also the documentation misspells the dbCLS () function as dbCls () !

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Lee Aby
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Posted: 31st Jan 2009 08:09
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Matty -

I think the problem is somewhere else. I can draw a line and box by using dbLine () and dbBox () but dbCircle() and dbEllipse () are not working. It is actually weird.

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