Incorrect width measurement of vector objects
Posted on Wed, 2010-08-11 14:05
1 2 3 4 5 6 7 | local joystick = display.newGroup() joystickOuter = display.newCircle( 60 , 60 , 59 )joystickOuter:setFillColor( 45 , 66 , 72 ) joystickOuter.strokeWidth = 2 joystickOuter:setStrokeColor( 183 , 237 , 254 ) joystick:insert( joystickOuter ) joystick.joystickOuter = joystickOuter print(joystickOuter.width) |
this width should be 120px but is reported as 122. Measuring / counting pixels on screen shows there are 120 in width
Replies
Posted on Thu, 2010-08-12 04:51
#2
Hi Tom
Please run the demo or look at the code and do the math.
Radius of 59 pixels, gives object of 118px wide.
Adding a 2px stroke adds 1 px to either side, the outer part of the stroke.
This adds up to 120 px wide. Measuring a screen capture in a paint app will show the object is 120 px wide.
Asking corona the width gives 122px, doesn't seem right to me
Matthew,
I believe the extra pixels comes from the stroke width. The documentation for object.strokeWidth property says, "Note that stroke widths are broken up to inner and outer parts."
-Tom