Set center - Revision history

85.144.194.29: Category changed to "controlpoints".

85.144.194.29 — Mon, 25 Feb 2008 16:08:26 GMT

Category changed to "controlpoints".

←Older revision		Revision as of 16:08, 25 February 2008
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	[[Category:functions]]		[[Category:functions]]
-	[[Category:~~maps~~]]	+	[[Category:controlpoints]]

	==Definition==		==Definition==
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	{{Funcbox		{{Funcbox
-	\| category = ~~Maps~~	+	\| category = Controlpoints
	}}		}}

Sandman at 20:31, 30 November 2007

Sandman — Fri, 30 Nov 2007 20:31:04 GMT

←Older revision		Revision as of 20:31, 30 November 2007
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	File(s) used in example: [http://wwwhome.cs.utwente.nl/~bergfi/fenix/wiki/set_center.PNG set_center.png]		File(s) used in example: [http://wwwhome.cs.utwente.nl/~bergfi/fenix/wiki/set_center.PNG set_center.png]
		+
		+	{{Funcbox
		+	\| category = Maps
		+	}}

Sandman: /* Example */

Sandman — Tue, 22 May 2007 21:38:52 GMT

Example

←Older revision		Revision as of 21:38, 22 May 2007
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	End		End
	</pre>		</pre>
		+	Used in example: [[load_png]](), [[write]]()

-	File(s) used in ~~the above~~ example:	+	File(s) used in example: [http://wwwhome.cs.utwente.nl/~bergfi/fenix/wiki/set_center.PNG set_center.png]
-		+
-	[~~[Image~~:wwwhome.cs.utwente.nl/~bergfi/fenix/wiki/set_center.PNG]]	+

G105b: /* Notes */

G105b — Tue, 22 May 2007 14:28:07 GMT

Notes

←Older revision		Revision as of 14:28, 22 May 2007
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	== Notes ==		== Notes ==
-	You set the position of [[control point]] 0 in the graphic. This [[control point]] gives acts as the graphic's [[coordinate]] on screen. For example, if a graphic's centre is set to 0,0 , then the upper left pixel of the graphic will be placed on screen at the graphic's coordinates. If no centre is set, by default [[control point 0]] is set to the graphics true geometric centre.	+	You set the position of [[control point]] 0 in the graphic. This control point gives acts as the graphic's [[coordinate]] on screen. For example, if a graphic's centre is set to 0,0 , then the upper left pixel of the graphic will be placed on screen at the graphic's coordinates. If no centre is set, by default control point 0 is set to the graphics true geometric centre.

	Another key feature is that the graphic will rotate around its centre, as set by this function, and any horizontal or vertical mirrors (set with [[flags]]) will flip at this point.		Another key feature is that the graphic will rotate around its centre, as set by this function, and any horizontal or vertical mirrors (set with [[flags]]) will flip at this point.

G105b: /* Definition */

G105b — Tue, 22 May 2007 14:27:16 GMT

Definition

←Older revision		Revision as of 14:27, 22 May 2007
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	Allows you to change the centre [[pixel]] of a graph.		Allows you to change the centre [[pixel]] of a graph.

-	This function changes a graphic's centre [[pixel]], which is the [[pixel]] that is located on screen at the [[graph]]'s x and y coordinates.	+	This function changes a graphic's centre pixel, which is the pixel that is located on screen at the [[graph]]'s x and y coordinates.

	== Parameters ==		== Parameters ==

G105b: /* Example */

G105b — Tue, 22 May 2007 14:24:51 GMT

Example

←Older revision		Revision as of 14:24, 22 May 2007
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	Program example;		Program example;
	Begin		Begin
-	graph=load_png("~~example~~.png"); //Loads a 128x128 image as the graphic	+	graph=load_png("set_center.png"); //Loads a 128x128 image as the graphic
	x=160;		x=160;
	y=100; //Places the graphic in the centre of the screen		y=100; //Places the graphic in the centre of the screen
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	End		End
	</pre>		</pre>
		+
		+	File(s) used in the above example:
		+
		+	[[Image:wwwhome.cs.utwente.nl/~bergfi/fenix/wiki/set_center.PNG]]

G105b at 14:07, 22 May 2007

G105b — Tue, 22 May 2007 14:07:22 GMT

New page

[[Category:functions]]
[[Category:maps]]

==Definition==
'''INT''' set_center ( <'''INT''' FileID> , <'''INT''' GraphID> , <'''INT''' x> , <'''INT''' y>)

Allows you to change the centre [[pixel]] of a graph.

This function changes a graphic's centre [[pixel]], which is the [[pixel]] that is located on screen at the [[graph]]'s x and y coordinates.

== Parameters ==
{|
| '''INT''' FileID || - The [[FileID]] assigned to the archive.
|-
| '''INT''' GraphID || - The [[GraphID]] who's centre to change.
|-
| '''INT''' x || - The new horizontal centre [[coordinate]] of the [[graph]].
|-
| '''INT''' y || - The new vertical centre [[coordinate]] of the [[graph]].
|}

== Returns ==
'''INT''' : Always returns 1 (?).

== Notes ==
You set the position of [[control point]] 0 in the graphic. This [[control point]] gives acts as the graphic's [[coordinate]] on screen. For example, if a graphic's centre is set to 0,0 , then the upper left pixel of the graphic will be placed on screen at the graphic's coordinates. If no centre is set, by default [[control point 0]] is set to the graphics true geometric centre.

Another key feature is that the graphic will rotate around its centre, as set by this function, and any horizontal or vertical mirrors (set with [[flags]]) will flip at this point.

When a graphic is used as a [[mouse]] pointer, its centre point is used for the mouse tip. Most mouse cursors in [[Operating System]]s have a mouse with the tip in the upper left of the image. Therefore, for a standard mouse pointer in Fenix, you will have to set the centre at 0,0 to enable mouse acuracy.

== Example ==
<pre>
Program example;
Begin
graph=load_png("example.png"); //Loads a 128x128 image as the graphic
x=160;
y=100; //Places the graphic in the centre of the screen
write(0,0,0,0,"Press [1] to set centre to 0,0");
write(0,0,0,10,"Press [2] to set centre to 64,64");
Loop
if(key(_1))
set_center(0,graph,0,0);
end
if(key(_2))
set_center(0,graph,64,64);
end
angle+=100; //Rotates the graphic constantly
frame;
End
End
</pre>