ActionScript 3.0 :: Position Object Along Edge Of Circle
Oct 21, 2010
What I'm doing is taking an image and "folding" it into a cylinder. I am then placing smaller images at certain points in front of that image. The large image isn't big enough to make a decent-sized cylinder, so I had to use it twice, which is fine. So now I need to create doubles of every small image that goes in and place them at opposite points (from the top perspective) in the cylinder.
Here's my problem: I want my inputs to be a simply x and y representing where the object would be if it were overtop of the flat large image. I take those inputs and (attempt) to convert the x coordinate into an angle, with which I can calculate the object's x and z position, as well as its y-rotation. However, my input range seems to be much more limited than it should be. The problem seems to lie in my angle calculation, since the others are pretty standard. Here's what I'm using right now:
[Code]...
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Jul 31, 2009
I'm not so hot with this type of math.I'm trying to duplicate and position a movieclip (not animate around circle just place) around the circumference of a circle.The part I'm having a hitch with is respecting the movieclip's angle.I'm setting the movieclip's registration point at the bottom center.
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May 31, 2011
I am trying to animate a circle from a position to another, but the speed is like "easeIn" twining animation. The moving speed start high and ending a smooth slow animation like easing. I know It can be done thru easing. but its not helping to my animation which i am doing currently. So pls someone help to do this by "EnterFrame" event.
Circle starting position : 10 px
Cricle Ending position : 500 px
Starting Speed : 20px /per sec
Ending Speed : 1 px / per sec
So what will be the speed in middle of somewhere ?
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Dec 6, 2006
Im working on a system that loads text from an external source and scrolls the information across the screen. I've figured that part out but what I need to know how to do is get the loaded elements(which are textboxes in movie clips) to align to the right of each other respectively when loaded since they all will have different widths based on how much text is in there.
Example: [Loaded movie clip with text here number 1][Loaded movie clip with text here number 2][Loaded movie clip with text here number 3]
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Nov 18, 2009
I'm trying to create a flash app which creates and positions circles around the circumference of a circle. My issue is that my grasp of trigonometry is flimsy at best and I'm struggling to create the code.
Here is what I have so far (Called rotation matrix, because that's eventually what I will be using on it):
ActionScript Code:
package com
{
import flash.display.MovieClip;
import flash.display.Sprite;
[Code]....
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Sep 23, 2007
I'm trying to find a random x,y value that always is at the far end of a circle. Like if the circle has a diameter of 300 pixels and the centerpoint is at 50,50, I want a random position on the outskirts of that circle. Just cant seem to do it.
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Jun 18, 2008
I have a circle and a square on the stage. When you click on the square the circle will go to "circle._x = 300" when the circle is at 300 I want to make it when you click on the square the circle will go "circle._x = 45"
Code:
moveCircle = function () {
circle._x = 300;
if (circle._x >= 300) {
circle._x = 45;
}} square.onRelease = function() {
moveCircle();
trace(circle._x + "is the position of the circle");
}
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May 29, 2011
I've got two concentric circles with their centers at (centerX,centerY). The inner circle has a radius of 100 and the outer circle has a radius of 400. If take a point on the circumference of the inner circle, I can draw a line from the center to that point. Let's call that point x1,y1). I now want to continue that radius out to the outer concentric circle and calculate the position of that outer point (x2,y2).
I'm adding a 3px 'dot' just to show where x1, y1 is on the screen. (Subquestion: I can't see it...not sure why.)This is what I'm trying:
var x1:Number = 100;
var y1:Number = 50;
var x2:Number;[code].............
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Apr 14, 2004
Does anybody know how to make an object moving in a smooth circle?
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May 7, 2011
Essentially what the project consists of is I have random balls appearing on the screen and moving around and I need to make it so that the user is able to draw a circle around the ball (may be more than one) and have that balls dissapear and count the number of balls circled.This project is being done in flash builder 4.5 and is being made for the android platform as part of a senior project.I have been able to randomly create the balls and give them a random movement. I have also been able to figure out how to allow the user to draw on the screen.
What I am trying to figure out is how to make it so that if the user draws a circle around the balls make it so that I know these balls have been circled and make them dissapear and have the number of balls inside the area calculated.I have thought about making the entire background a grid and make it so that I can track somehow the line made by the user and then track the coordinate of the balls then if it is within that area it means that the ball has been circled but I would like something more efficient than that.
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May 28, 2010
I have a square object in the middle of circle.and i can move square object using up, down, left, riht arrow keys. I need script for when square object touches circle, then it goes to back, I have use for this below code :
var myobjdim:Array=new Array;[code].....
In above code "myobjdim" is square object and "bg1" is circle object..
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May 7, 2011
Essentially what the project consists of is I have random balls appearing on the screen and moving around and I need to make it so that the user is able to draw a circle around the ball (may be more than one) and have that balls dissapear and count the number of balls circled. This project is being done in flash builder 4.5 and is being made for the android platform as part of a senior project.
At this point this is where I am.. I have been able to randomly create the balls and give them a random movement. I have also been able to figure out how to allow the user to draw on the screen. What I am trying to figure out is how to make it so that if the user draws a circle around the balls make it so that I know these balls have been circled and make them dissapear and have the number of balls inside the area calculated.
I have thought about making the entire background a grid and make it so that I can track somehow the line made by the user and then track the coordinate of the balls then if it is within that area it means that the ball has been circled but I would like something more efficient than that.
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Apr 24, 2010
I have a circle drawn on the screen, wherein I add a moving object. I want it to keep inside. My strategy is to calculate the circle's radius and compare it with the distance the moving object is off its center. I beleive it's the proper solution. However, I'm having a problem with letting Flash know when the running guy should stop, so he doesn't leave the circle and ruin all the fun. Here's the code I'm using (it's not working of course):
function moveTheCreaturesRightwards(event:Event)
{
if(maleMovingRight == true)
{
[Code]....
The line: rayMale.width = maleRadius.width; was added when nothing else had seemed to be working
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May 7, 2011
Essentially what the project consists of is I have random balls appearing on the screen and moving around and I need to make it so that the user is able to draw a circle around the ball (may be more than one) and have that balls dissapear and count the number of balls circled.
This project is being done in flash builder 4.5 and is being made for the android platform as part of a senior project.
At this point this is where I am.. I have been able to randomly create the balls and give them a random movement. I have also been able to figure out how to allow the user to draw on the screen.
What I am trying to figure out is how to make it so that if the user draws a circle around the balls make it so that I know these balls have been circled and make them dissapear and have the number of balls inside the area calculated.
I have thought about making the entire background a grid and make it so that I can track somehow the line made by the user and then track the coordinate of the balls then if it is within that area it means that the ball has been circled but I would like something more efficient than that.
I apologize if it is unclear for what I am looking for but a simple description is I am making a simple game where you are able to circle a moving item on screen, then once it is circled the item disappearsand you gain a point.
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Aug 7, 2003
i use this to make an object spin in a circle
onClipEvent (load) {
this._rotation = 10;
_x = 260;
[Code].....
Now what i need to know is how can i make a sentence for example "welcome to blah blah blah blah" go around in a circle i already try using Dynamic text and wrap the word but only thing i get is the whole sentence just going around with out going around following each other.
how to make an object spin in an 360 degree sorta like sureshot's site.
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Dec 15, 2004
ive recently made a game in which you have to avoid some big evil round planets. i found out the in the making of that that using the function hittest uses square objects. i dident bother much then with it, i just brought out the ol'e algebra book and looked up the distance formual and made my own hittest. now my questyion is is there a more refined way of using hittest for a more irregular object than a circle.
I made somewhat irregualr objects have hittest boxxes so that it was split up into many smaller parts, this gets kinda tedious if its really irregualr or if i need to move it around on the screen btw if anyone wants ta c the game i made [URL] avoid everyting , and shop at the store on the planet , u can go over the big planet in lower left corner but not the ones in orbit a few bugs still like only way to restart is the reload button in browser
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Aug 2, 2011
I have an object called point that I can move around the screen with my mouse. This object has a vector mapped through it (_v1) using the center of the stage and "point"s x,y location in order to draw the vector (note all of this is working fine). My problem is occurring when I set up was a button that simply sets a value to true if you press it. The idea behind this button is that when pressed, whatever location "point" is at, it will move 1 degree clockwise in a circle around the center of the stage (this is all happening in the frameHandler so I can keep clicking the button to make it continue around the stage).
The code I am using is based in an if statement listed below:
if(clockwisePressed) {
var v1angle:Number = _v1.angle;
v1angle++; //increase the angle by 1 degree
if(v1angle>180) {
v1angle -= 360; }
[Code] .....
So what is happening here is that clockwisePressed has been set to true so this fires off. My vector (_v1) is set up to tell me the angle (already converted from radians to degrees) but it's a read-only value. So I assign it (_v1.angle) to v1angle so I can mess with it and increase it by 1 so I'm moving clockwise around the center of the stage. Then I just check to make sure that it falls into a range between -180 and 180 (if I trace _v1.angle around the stage, 0 degrees is to the left, 90 degrees is straight up, 180 degrees is to the right, and -90 is straight down). Now using the formula I derived from this thread but converted to work with 0 degrees pointing to the left and the value for Y going up the further down the stage you go, I came up with
x = centerX - radius * cos(angle)
y = centerY - radius * sin(angle)
Now when I make a sample chart on paper and use these values on my calculator, this works like a charm. If I plug in an angle, the radius, and center I get a point right on my circle I draw on a sheet of graph paper. However, when I actually try this in flash, the "point" jumps all over the stage. (Note that _v1.m is just the magnitude of the vector between the center of the stage and "point" which is the same as the radius). So I trace everything and the values for cos and sin don't seem to be coming out right. For example, if my angle is -1.9581 and I take the cos of that on my calculator I get something along the lines of 0.9994 but flash traces Math.cos(angle) to be -0.3777. Isn't using Math.cos(-1.9581) the same as putting -1.9581 into your calculator and hitting cos?
Below is the corrected code that works:
if(clockwisePressed) {
var v1RadAngle:Number = Math.atan2(_v1.vy, _v1.vx); //get angle in radians
v1RadAngle += 0.0174; //increase the angle by ~1 degree more or less
//Now just move the crosshair and get it ready to be redrawn
point.x = centerX - _v1.m * Math.cos(v1RadAngle); //_v1.m = radius
point.y = centerY - _v1.m * Math.sin(v1RadAngle);
clockwisePressed = false; //remove button pressed boolean
}
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Oct 9, 2010
In AS3 is there an easy way for collisions to take place between a moving circle and a rectangle object. A moving circle has a direction and you need to know how it collides with an object rather than knowing it just hits. In .net you use a points test where you test several points around a circle to see what hits an object and then you can work out what direction it will bounce off.
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Feb 16, 2011
I'm trying to trace the path of an object by using setPixel on the object's position every frame in a BitmapData/Bitmap pairing. These pixels aren't showing up normally and I suspect I have a fundamental misunderstanding of the BitmapData class. Here's what I'm doing:
public var contrailBase:BitmapData;
public var contrail:Bitmap;
private var contrailColor:uint;[code].....
Using this code, the red pixels don't show up. If I initialize contrailBase to 0xFF000000 instead then I get a black screen on which the red pixels DO draw, but I need the bitmap to be transparent except for the contrail. What am I doing wrong?
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Jul 5, 2005
I'm trying to move an object along circlular motion guide dynamically using two buttons -- a left button, when pressed down, will move the object counter clockwise, and the right button clockwise.
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Apr 5, 2011
My basic requirement is to draw a circle inside a BorderContainer with the layout set to BasicLayout.I run this method in the CREATION_COMPLETE event of the BorderContainer object.[code]I know I must be missing something VERY basic here. Can I just draw like this OR should I draw in some other event? I know that I can create a Ellipse object and easily add it to the border container but I would like to know how I can do this using the graphics object.
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Mar 8, 2005
I'm developing a game atm, and I need some help on the mathematics/coding of colliding circles (and their change in x/y speed). What i need to know is how to calculate the direction and speed a circle has after colliding with a static (non-moving) circle. I know how to detect a collision between the two, but I'm not sure about the maths I need to give the circle the right speed and direction after the collision
If i do know how far away the two circle-points (in the middle of each) are to each other (in both x and y coords) would it be easy for me to find the new speed and direction of the large circle in the example above? I know that I somehow should use the angles to pretend the circle hits a flat "wall" (as it only hits one point), and then calculate the new speed/direction. My only problem is that I'm not sure how to decide the angle of this flat "wall" and how x and y speeds should change when colliding with a wall that is angled. Does anyone here have any insight, links or tips on how I can du this?
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Sep 30, 2005
i want to make one circle follow the mouse cursor, inside another circle. Similar to an eye looking at the cursor. Ive attached an example.
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Nov 5, 2008
I have text in a dynamic field showing up as circle. I want to say if circle shows up change it to cercle (french).
[Code]...
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Mar 8, 2005
What i need to know is how to calculate the direction and speed a circle has after colliding with a static (non-moving) circle. I know how to detect a collision between the two, but I'm not sure about the maths I need to give the circle the right speed and direction after the collision.If i do know how far away the two circle-points (in the middle of each) are to each other (in both x and y coords) would it be easy for me to find the new speed and direction of the large circle in the example above? I know that I somehow should use the angles to pretend the circle hits a flat "wall" (as it only hits one point), and then calculate the new speed/direction. My only problem is that I'm not sure how to decide the angle of this flat "wall" and how x and y speeds should change when colliding with a wall that is angled.
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Jun 11, 2010
I'm stuck thinking about the best way to go about setting a line segment's position, I have a class Line(length, angle, previous) being called from a class Polygon. Right now I have:
public class Line extends Sprite {
public function Line(length:Number, angle:Number, previous:Line = null) {
if (previous != null) {
this.x = previous.end.x;
[Code].....
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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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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.
Is there any way to do this in flash?
I have some following code:
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].....
So, can anyone convert these three point curve line to 8 points circle?
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Oct 6, 2009
I have to draw a circle using action script. The Circle Diameter has to be controlled by a button.
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Apr 10, 2010
Trying to do circle circle collisions via math which I'm really having trouble with. One circle (player) just moves from keyboard. The ball reacts to the player. All the code shown is in my players class and I passed in a reference to the ball.
On my enterframe I have:
Code:
var xmov1 = xSpeed;
var ymov1 = ySpeed;
var xmov2 = ballRef.xSpeed;
var ymov2 = ballRef.ySpeed;
[code]....
Perhaps I'll go with a box2d equivalent instead of trying out my own physics shenanigans.
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