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DarkBASIC Professional Discussion / Parameter for "rgba" do not match "RBGAColor" at line X

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Sam
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Posted: 18th Jun 2011 06:02 Edited at: 18th Jun 2011 06:05
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Hello everyone,

Just need a little help with the rgba command. I get a compiler error every time I try to use the command. I can use rgb fine but not rgba for some reason. I don't even get the DarkBasic Professional Help file when I press F1 while next to the command in the editor. Is this because I don't have an add-on module of some kind installed? If so, which one?

I get the following errors when I try to compile:

i.e.: Parameter for 'rgba' do not match 'RGBAColor' at line 6.
i.e.: Cannot use reserved word 'rgba' as declarations at line 3209.

Can anyone help?

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Neuro Fuzzy
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Posted: 18th Jun 2011 06:55 Edited at: 18th Jun 2011 06:59
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I'd reckon it's the space in between "rgba" and "("

so change it to:
myColor = rgba(255,255,255,255)

[edit]

OHHHHH. Sorry - the RGB function isn't like the rgba function. The rgba function isn't even a built-in DBPro command, it's part of a matrix1Utils plugin. "rgba()" returns the alpha component of an argb color.

from the help files:



Why does blue text appear every time you are near?
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Grog Grueslayer
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Posted: 18th Jun 2011 07:10
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You can get IanMs great Matrix 1 Utilities Plugin here.

https://forumfiles.thegamecreators.com/download/2192430

If your goal is to change the alpha level as you change the color IanM has his own version of RGB() where the syntax is RGB(Alpha,Red,Green,Blue).

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Sam
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Posted: 18th Jun 2011 11:22 Edited at: 18th Jun 2011 11:39
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Interesting thing happened. I installed the Matrix 1 Utilities plugin (copied all the dlls to plugins-user folder). Then tried to compile myColor=rgba(255,255,255,255), but it resulted in the same error (Parameter for 'rgba' do not match 'RGBAColor' at line 6). So I tried myColor=rgb(255,255,255,255) and got another error (Duplicate TRIM$ in StyxCore.dll and Matrix1Util_16.dll!Command in 'StyxCore.dll' command-table unrecognized(TRIM$[%SSS%TrimStr)).

Styx is a DarkBasic Pro plugin I had installed. So I removed all the Styx dlls from the plugins-licensed folder and tried again. The line of code used was myColor=rgb(255,255,255,255) and it worked.

Does this mean there is a bug? And is there a way I can get the myColor=rgba(255,255,255,255) instead of myColor=rgb(255,255,255,255) to work? I am trying to compile the "World of Tanks Demo3a" by Dr Tank. I found it here on the forum. Dr Tank used rgba in his code.

http://forum.thegamecreators.com/?m=forum_view&t=175932&b=8

My version of Dark Basic Professional is 1.0761. Not sure if it has anything to do with me updating to a recent version.

Thanks everyone...
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Green Gandalf
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Posted: 18th Jun 2011 13:11 Edited at: 18th Jun 2011 13:13
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Quote: "tried to compile myColor=rgba(255,255,255,255), but it resulted in the same error "


Well it would wouldn't it? Read Neuro Fuzzy's post again (Edit: and Grog Grueslayer's ). The syntax is

Quote: "Alpha = RGBA ( Colour )"


You have given it four arguments not one. The single parameter "Colour" should be a dword as returned by the rgb() or point() functions for example.
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Sam
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Posted: 18th Jun 2011 13:44 Edited at: 18th Jun 2011 13:51
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Yes, alpha=rgba(colour) will compile as long as Styx dlls are not present inside the plugins-licensed folder.

The funny thing is that Dr Tank has used the rgba command in his code a few times with more then one argument. Look for this in his code:



And I am assuming he was able to compile it that way because he also provided an executable along with everything.

I have attached his code for you to see. You can find the entire project and assets here:

http://forum.thegamecreators.com/?m=forum_view&t=175932&b=8

Also, Dr Tank is not the only one using more then one argument. Getix Interactive has used this in his code:



You can take a look at his stuff here:

http://forum.thegamecreators.com/?m=forum_view&t=104849&b=1

Does this mean that the syntax has since changed and more then one argument is no longer supported?

Thanks...
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Green Gandalf
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Posted: 18th Jun 2011 16:07
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Quote: "Does this mean that the syntax has since changed and more then one argument is no longer supported?"


I don't know but it is possible - or the other way round and I've got an old copy. Which version are you using?

However I think it's unlikely as my understanding is that IanM's rgba function was intended to work the same way as the DBPro built-in functions rgbr(), rgbg() and rgbb(), i.e. to extract a particular colour component.

I haven't seen Dr Tank's code but it's possible he defined his own rgba() function. Other people may have done so too.
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Green Gandalf
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Posted: 18th Jun 2011 16:13
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Just read your posts again.

I suspect the code you are using has a declaration for an rgba() function. This is what you said:

Quote: "I get the following errors when I try to compile:

i.e.: Parameter for 'rgba' do not match 'RGBAColor' at line 6.
i.e.: Cannot use reserved word 'rgba' as declarations at line 3209.
"


Perhaps you should post that declaration?

For example the following code (just test code obviously) gives that error for me:



That declaration presumably conflicts with the rgba() function in the Matrix1 plugin which I have.
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Neuro Fuzzy
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Posted: 18th Jun 2011 22:01
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yes, a lot of Dr. Tank's code snippets use a function "rgba" defined in his code.

The IanM matrixutils code does NOT work like the code Dr. Tank wrote. Dr Tanks function is something along the lines of:



so it returns a 32-bit color, with 1 byte per color. Ianm's function does the opposite. it takes in a 32 bit color and provides the alpha component of that color:



So, if you have to functions, IanM_rgba, and DrT_rgba, then if you wrote:

n=IanM_rgba(DrT_rgba(1,2,3,4))

the return value would be the alpha component of the color, so n=4. IanM's rgba function accepts one argument, while dr tank's rgba function accepts four arguments. You can't pass four arguments into a 1 argument command, and that's why you get an error. Write your own function!


Why does blue text appear every time you are near?
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Sam
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Posted: 18th Jun 2011 22:11 Edited at: 18th Jun 2011 22:22
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You are absolutely correct Green Gandalf. Dr Tank has a declaration in his code that conflicts with rgba().



I simply replaced all the rgba for rgbt (red, green, blue, transparent) and it worked like a charm (similar to Neuro Fuzzy's solution).

Thanks a lot for your insight. And thanks everyone else for their support as well.

Dr Tank's code now compiles fine and I have attached a copy for everyone who would like a working copy. You will need to download the rest of the project and its assets which can be found here:

http://forum.thegamecreators.com/?m=forum_view&t=175932&b=8

Cheers!
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IanM
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Posted: 18th Jun 2011 23:53
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There's also a function built into my colour plug-in that allows you to specify 4 parameters - it's also called RGB just like the built-in one. The alpha value should be specified as the first value.

Get the latest Matrix1Utility plug-ins (20-APR-2011)
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