ActionScript 3.0 :: Detecting Perfect Circle Drawn By User
Oct 24, 2010
I'm working on a project for a client, they want a simple drawing api which requests the user to draw a circle, or a shape on screen. The circle is then analyzed and a Score/Percentage of correction is returned. The drawing I have covered, how to assess the drawn circle against a perfect circle?
My first idea was to put invisible trigger points around the circumference of the shape and check for hit tests when the user is drawing. Another would be to track the dimensions of the left, right, top and bottom most bounding box and then find the radius, or something to that effect.
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Dec 17, 2008
any techniques they use to draw a perfect half circle?
I've seen the curveTo() method, and I cannot seem to make it come out with anywhere nearly good enough results. It always looks like half of a skewed ellipse.
I don't *want* to use a mask -- since there will be other drawings on this same Sprite that I do not want masked.
To be even more picky -- I don't *want* to create the half circle in another Sprite and add that to my original drawing.
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Feb 10, 2009
I have tried to draw a circle using drawing API curveTo function. But the result is not a perfect circle. Flash documents also suggest this method. Check this link >> This is the code I have used to make a circle of radius R and the registration point of circle movie clip is at the center.
[Code]...
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Nov 3, 2010
This draws almost perfect circle:
ActionScript Code:
var _angle:Number = 0;
var _speed:Number = .1;
var _radius:Number = 100;
[code]...
but...... if I wanted the circle to be drawn faster and change _speed to lets say .7 the circle becomes a polygon. How to get the circle to be drawn fast so it looks like a circle?
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Aug 24, 2009
I`m working on a app that you can draw lines.....like circles, rectangles... my problem is when a user draw a circle for example....i wanna be able to paint (change color) inside of this circle. I`ve tried working on Shapes with cacheAsBitmap = true and Bitmaps with BitmapData but it doesn`t seens to work.
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Aug 15, 2010
Let's say i have a simple app where on mouse move user draws a shape. What i am trying to accomplish is to detect if drawn shape is circle so was wondering what would be the best or easier way to do that?
I believe i should do some math based on every drawn point X,Y coordinates but i need a push in right direction from more experienced people around.
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Jul 7, 2010
I am trying to dynamically draw a circle and fill it up with some color. Drawing a circle is pretty easy job for me, but fill it up with some color seems not happening today.
PHP Code:
Circle function starts
function fnDrawArc(mc,x,y,r,angle){
mc.beginFill(0xFF0000); // this is not working....
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[Code] .....
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Jan 30, 2009
I feel like I am not 'getting' something very simple here:I have a bit of AS3 which uses a loop to draw X number of circles which are placed as data points on a 2-dimensional line graph:
Code:
var circleSize:uint = 10;
var line:Shape = new Shape();
[code]........
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May 20, 2009
I draw a rectangle i should see a little bold circle to indicate a perfect rectangle, I seemed to lost mine, can somebody please tell me how to get it back!
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Feb 20, 2009
I want to duplicate objects that users have drawn. I set up a pencil class and added those drawings to a container. I tried duplicating the container , which worked, but did not duplicate the drawing. Only the container. I know I'm missing some vital piece of information here.in DOC class:
Code:
public function Seed():void{
grow1.addEventListener(MouseEvent.CLICK, onGrow, false,0,true);
[code]........
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Feb 21, 2012
I'm working on a Flash project in which users are able to draw on the stage. Once they've drawn their lines and turned off the pen tool, though, I want them to be able to do something unusual. I want them to have the ability to drag and drop the lines they've drawn. I actually don't really care whether they pick up individual segments separately or everything together, but they need to be able to drag and drop in some way, shape or form.
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ActionScript Code:
onMouseDown = function(){
if (penOn) {
if (erased7 == true) {
[Code]......
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Nov 16, 2008
I've created a drawing application intended as an interactive art piece for a gallery. I'd like to have what each visitor draws in one scene to somehow be carried over into the next scene and be displayed on clicking a button. Ideally, the user-drawn images will scale and position themselves accordingly to maximize the screen space. This way, if only three people have visited and drawn something, their three images would enlarge to fill the screen. If 12 people draw something, those 12 images would shrink to fill the space.
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[Code]....
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[code]......
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[code]....
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