ActionScript 3.0 :: Rotating Point Around Center Of Circle
Mar 9, 2009
I am trying to rotate some points around the center of the circle(0,0), however I'm getting weird values from the output. I've commented the problem code..
Code:
var r:Number = 10;//radius
var y:Number;
var x:Number;
var a:Number = 90;//angle of which the semi-circle is facing.. could be a random angle.
var ax:Number;//rotated points
[Code] .....
I am using the semicircle in BitmapData collision checking with getPixel(), with a moving circle...
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Jan 31, 2010
I have been working on this and thinking about it for days but I just can't seem to get it right. I want to have a circle that I can "pick up" with the mouse and then rotate (with the rotation point in the center). Currently I have done this with the following code:
PHP Code:
var radians = Math.atan2(mouseY-circle.y, mouseX-circle.x);
var degrees = Math.round((radians*180/Math.PI));
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Mar 6, 2009
What I'm trying to do is make a dial-type of interface, where you click on a point on the edge of a circle and that point will rotate to another point at the top of the circle. What I can't figure out is how the make "Point B" rotate to "Point A", where "Point A" is always fixed at the top of the circle and "Point B" (and Point C and Point D, etc...) are located along different points on the edge of the circle. I'm using the tween function to rotate, so what I need to figure out is how to get the difference in the rotation between the two points.
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Mar 25, 2007
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Aug 9, 2011
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Dec 6, 2009
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May 27, 2010
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Mar 16, 2012
I want to create circle, and put 8 points on it. So, user can drag each point in order to change it's shape.
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Ref. - How to draw a continuous curved line from 3 given points at a time
package{import flash.display.Sprite;
import flash.events.MouseEvent;
import flash.geom.Point;
[Code].....
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http:[url]....
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I have been given the task to create something similar to the flash navigation on the link below. I have tried googling things such as "flash image rotation", "flash rotation circle", etc?[URL]
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Jan 31, 2010
I have been working on this and thinking about it for days but I just can't seem to get it right. I want to have a circle that I can "pick up" with the mouse and then rotate (with the rotation point in the center). Currently I have done this with the following code:
PHP Code:
var radians = Math.atan2(mouseY-circle.y, mouseX-circle.x); var degrees = Math.round((radians*180/Math.PI)); circle.rotation = degrees + 90;
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[Code] .....
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I try to make a looping rotating circle but I have wobbling during the rotation. It seem that the problem come from Flash. I tried manually on the timeline, by the code... but no results.I would expect a PERFECT circle ![URL]The circle is 2000px*2000px, center is -1000px*-1000px
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Feb 18, 2003
my problem is that even if the registration point of the MC I want to rotate is in its center it keeps rotating in its upper left corn.The MC is a jpg I load dynamically.The syntax I use is : _root.photo._rotation += 90;
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I have a big circle with buildings all around the edge. There are two buttons that should control it. One to rotate the circle left, and one to rotate the circle right. I'd like each click of a button to rotate the circle and have it stop on a building, which then would activate an animation of the building.
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Dec 14, 2009
All I need to do is rotate an object (which could spawn at any point along each of the four edges of the screen) so that it faces towards the centre of the screen. Obviously this will be done using the .rotationZ property. I will know the starting point of the object, and the centre point of the screen (400, 300). The object begins facing directly 'up' (e.g. if it spawned directly below the centre of the screen it would already be at the correct angle).
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Nov 4, 2010
a movieClip that contains a polygon and some circles at the angles of the polygon. I want to use the circles as rotation handles.Now the code below works but it terribly, terribly slow.I've seen a couple of other examples of rotation using the mouse position, but I want the polygon to rotate via the handle; I think that means the angle of rotation needs to be updated each time the mouse moves.Is there a cleaner/more efficient way to do this?Also, this works only for one direction right now no matter the x/y direction you move the mouse.
public function mouseDownRotate(event:MouseEvent):void {
// get the global x and y of the dragged piece (offset so it looks like it's rotating around the polygon's center
[code]......
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Jan 27, 2006
I have spent hours trying to figure out how i could rotate a loaded movie through the centre axis rather than the set point set by flash in the left corner.
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I'm doing a little photo rotation front-end for a site I'm working on. It's a custom photo gallery site that needs to have a photo rotation functionality to it. The back-end developers couldn't find a decent way to do it in Javascript, so they've come to me to figure it out in Flash.They pointed me to the Flickr rotation tool as an example. Seems like it should be straightforward:Load photo into empty movie clip on stageRe-center photo movie clip to the stageUse left/right rotation buttons to rotate image in 90 degree incrementsThat said, I'm having a tough time, after I load a photo into the empty movieclip, using a rotate left and rotate right button to spin the photo around. Obviously, the registration point is in top-left corner of the photo movieclip when the photo is loaded.
I've read that rotation can be managed by putting the clip to be rotated into an outer clip, but...there's a catch......I won't ever know what the exact size of the photo being loaded is going to be, so I can't set the outer clip to a certain size. I only know that it will never be wider than 100px.
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Feb 10, 2011
I can do it on pen and paper using a compass, but can't do it in Actionscript 3.As the title says, essentially I need to find the centre of a circle using multiple points from the radius.
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