CODEWITHSUNDEEP
apache-flexflashactionscript-3
jedierikb
jedierikb

Reputation: 13109

how to draw a very short line with actionscript?

I am having trouble drawing a very short line with actionscript3:

var cSp:Sprite = new Sprite();
var cGx:Graphics = cSp.graphics;
cGx.lineStyle( 1, 0xFF0000, 1, false, LineScaleMode.NONE, null, null, 1 );

cGx.moveTo( 2, 10 );
cGx.lineTo( 3, 10 );

This creates two vertically stacked pixels which are not quite red (#7f0000)!

vertical line? http://www.freeimagehosting.net/uploads/449212bd1f.png

(here it is zoomed in:)

zoomed in http://www.freeimagehosting.net/uploads/5c9014a148.png

Since I am trying to draw a horizontal line, this is not what I expected. I assume there is some alias/sub-pixel trickery going on here. What's the magic combination of commands to draw a really short line or one pixel?

Note: if I make my really short line 4 pixels (or more) long, it is rendered as expected (4+ pixels long, 1 pixel tall, every rendered pixel #FF0000)

Upvotes: 1

Views: 1134

Answers (1)

aib
aib

Reputation: 47031

Did you try playing with the various caps and joints settings? Your values of null/null would direct Flash to use round caps and round joints. Your [last] parameter of "1" for the miter limit would also be ignored as you wouldn't be using miter joints.

I would suggest trying CapsStyle.NONE first. Then maybe miter joints. For reference: Graphics.lineStyle().

Edit: Try using pixel hinting, too.

Upvotes: 5

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