Actionscript 3 :: Calculating Evenly Distributed Points On A Line Of Points
Oct 3, 2011
I have been tasked with trying to create a drawing tool that draws dotted lines as you drag the mouse across the stage. I can easily capture the points on MouseEvent.MOUSE_MOVE and store them in a vector and then draw the points as dots:
The problem is that I need to calculate evenly distributed points on an ever growing Vector of points so I can only draw the line between say every 5th point (say using modulus). I have been battling away with Bezier curve equations both Quadratic and Cubic but still can't quite figure out how to convert my Vector of points into an evenly distributed Vector of Points without sucking the life from the CPU.
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Dec 3, 2010
First, just to give a visual idea of what I'm after, here's the closest result (yet not exactly what I'm after) image that I've found:[URL] BUT, it doesn't exactly solve the problem I'm after. I would like to store an array of points of a very specific spiral algorithm. The points are evenly distributed The 360 degree cycles have an even gap If I'm not mistaken, I think it's obvious that the two first points would be:
[Code]...
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Dec 27, 2011
I am developing a game for mobile in AIR (as3). I have created some bots for this game that initially just wander around. But when a bonus enters the stage, they have to move to the bonus.The detection of a new bonus and moving of the bots works fine, but there is something wrong with the manipulation when a new bonus enters the stage.Basically, this is how it works (or I try to make it work):My bot moves along with his rotation as a parameter. (works fine)
private function moveToNextLocation():void
{
var angle:Number = _rotation * 0.0174532925; // 1 degree = 0.0174532925 radians
var speedX:Number = Math.sin(angle) * _speed;
[code]....
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Dec 23, 2009
I'm developing some kind of dynamic time line. I want a curved line to represent time and dynamically put points over the curve representing the years. Maybe even have a slider along that curved line. I was thinking of creating the curve at runtime with bezier so that each time it would be different. Adding the slider is easy.... but I really don't know where to start for putting movieclips along the curve dynamically.
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Jul 3, 2009
I'm in the process of teaching myself the components of the CS4 Design Premium package using the Adobe Classroom in a Book series. I'm currently going through the Flash CIAB and i've started using the pen tool. The task involves creating a wave like design across the stage. Whilst this in itself is simple, the final instruction is to click on the first anchor point to close the shape. In the illustration, the closed shape seems to automatically extend around the stage, however when I click on the first anchor point, the line automatically connects between the two points in a straight line.
Am I doing something wrong? The next step is to fill this area, but with the straight line effect that I am getting, this becomes impossible. I should point out that the instruction states that the pen tool line should extend off the stage. I have done this, but even then on clicking on the first anchor point the shape is closed incorrectly.
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Jul 28, 2010
I'm trying to find a way to calculate the area of a polygon using lat long coordinates in a Flex 3 site. Hong007 on Google Maps for Flash group was cool enough to post the following function:
[Code]...
I was also playing around with the area calculator at [URL]. These functions produce slightly different results. I'm trying to figure out which one is more accurate. It seems that hong007's function produces results that are on average slightly larger than freemaptools' function. However, I don't know which one is more accurate.
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May 20, 2009
I want to create line between 2 points ...such tht the line will start when i click the point A then i will drag the line by holding it to point B and i will join the line to point B by clickin on point B (somethin like the pen tool) ..then line will then be joined between the points ...
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Oct 15, 2011
I have a component (link to Test class) which contain one line in it, and I put one point of this line to (0, 0).
Then drag it to Flash(fla), and get its Shape in AS3 like:
// in Test.as
// assume that the movie clip only contain one line.
var line:Shape = Shape(getChildAt(0));
And I can get one point of this line which is x and y of var line. But how to get another point of this line?
Edit:
Ignore component stuff above, here has another question but I guess it pretty much the same as the question above:
Draw a line from (0, 0) to (10, 10) and draw another line from (10, 0) to (0, 10), how to get those lines of two-point form in AS3?
If I access them as Shape then I get two similar shapes which have same x, y, width and height values. Does AS3 has some way to access line as a REAL line not just a shape? or does it has any way I can calculate it out?
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Aug 25, 2010
I want to ask how do you join two points with a line using actionscript? The points would be constantly moving.
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Oct 28, 2010
I have a line that is drawn using the draw api. I need to find points on the line when given the x value, how would I do this. I know on the bezier segment I can just user the yForX() and get the value but not sure how to with just a straight line.
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Oct 23, 2009
I need to create a line drawn between 2 points. My actual idea is of joining 3 points with lines drawn dynamically(for a triangle).
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Aug 20, 2009
I'm using Flash 8 and AS2 I am attempting to make some code that checks whether or not a line that rotates around the screen is hitting a movie clip. Here is my code (with comments explaining it):
[Code]....
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Feb 14, 2010
Closed path made with pen tool in Flash MX comprises of line segments & curved segments both.While adding anchor points on segments it is noticed that pen tool adds anchor points on curvaceous segments but not on line segments. Why is it so ? Is their any way to accomlish this task ?
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Feb 3, 2005
find a points in a line Actually i want to make some footsteps in a sand. The footsteps are dhynamically placed on the stage. How to find the points in a dioganal. see the image
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Feb 3, 2005
i'm trouble to find a points in a line Actually i want to make some footsteps in a sand. The footsteps are dhynamically placed on the stage. How to find the points in a dioganal.
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Oct 19, 2008
draw a squiggly or wavy line in the MOUSE_MOVED event as the user clicks and moves the mouse.
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May 10, 2011
I am trying to draw a continuous curved line in flash. There are many methods but none of the ones I have found so far quite fit my requirements. First of all, I want to use the flash graphic api's curveTo() method. I DO NOT want to simulate a curve with hundreds of calls to lineTo() per curved line segment. It is my experience and understanding that line segments are processor heavy. Flash's quadratic bezier curve should take less CPU power. [code]...
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Nov 1, 2010
this is the thing: Using "lineTo" i get a line drawn on stage when dragging a mc. Then i should have four mc (note1, note2, note3, note4) added randomly over this line. I mean, the line is drawn and then over some parts of this line, using x and y of some of the points drawn there, this movie clips should be added randomly. I can make the mc appear randomly, but always in the same point (mouseX, mouseY); i cannot access others x and y of the drawn line. This is my code (noteContainer is a sprite):
Code:
private function drawingAPI(event:MouseEvent):void{
sprite1.graphics.lineTo(mouseX, mouseY);
}
[Code]...
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Jan 11, 2012
I think it would be cool if the line started out as flat (i.e., y=_height/2 for all points) and then the y points of the line animate into place.I don't even know where to start with doing this in TweenMax/Lite... I've seen several code snippets that draw a line from left to right, but that's not what I want.
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Sep 27, 2005
Is there someone who is good at trigonometry? I have two points punkt1 and punkt2 and a line that is drawn between them. Both points is dragable. I want the line to continue after the points in both directions and with the same steep. I have counted the steep between point1 and point2 and tried to continue to drag to a point with the same steep, but it doesnt succed.
[Code]....
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Oct 17, 2011
iSo let's say I have three different arrays of objects, and I want to combine them into one sorted array. I want the order to be such that the items from each array are evenly distributed throughout the sorted array.
If there were 3 xItems, 3 yItems, and 3 zItems, the sorted array would have this order: x, y, z, x, y, z, x, y, z
HOWEVER, even if the arrays are differing lengths, I still need to make them alternate as much as possible. If there were 6 xItems, 4 yItems, and 2 zItems, the sorted array should have this order: x, y, x, y, x, z, x, y, x, y, x, z
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Mar 31, 2011
I am trying to implement contour lines in ActionScript using Conrec. I have looked at both the java and javascript implementation and am still stuck.URL...Conrec will take grid data and assemble continuous contour lines. The problem is that it does not necessarily draw those lines in a continuous fashion. For example, it will draw A->B and then C->B and then C->D instead of A, B, C, D, etc.The javascript implementation seems to be accounting for this and serializing the instructions into an array of draw points. Which is what I too want to accomplish in the end. That is it takes the instructions from the core Conrec logic (eg: A->B, C->B, C->D, etc) and organizes it into an A, B, C, D series. I think it will also return the series as a multi-dimensional array to accommodate broken lines (eg: [[A, B, C, D], [E, F, G]]). This last functionality is what I need to do in Actionscript.This last part is where I am stuck. Ignore Conrec for now (I have given up on finding an Actionscript implementation), how can I organize these instructions into a collection of serial points? When Conrec gives me "draw point from X->Y" how can I first check if X or Y are already in a series and append either X or Y (whichever is not in the series) into the series? AND if neither are in the series, start a NEW series with X, Y as the starting set. Then check subsequent instructions against all existing series and connect series if they now start and stop on the same point? Also, I need to be able to allow for a series to close itself (eg: A, B, C, A) -- a loop (is that even possible?!).
I'm not sure if there is a technical term for what I want to do beyond "concatenation". I also hope someone out there has done this with Conrec and can give me some pointers.In the meantime, I am going to continue to plug away at this and see if I can come up with something but I am not confident in my abilities.If you know another way to draw contour lines from grid data, I am open to alternatives. But I have to be able to implement it in Actionscript.
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Apr 15, 2011
I have a large-ish array of points.
The graphics object I am using has it's alpha value set to 0.1.
When these points are plotted iteratively, and the line being drawn overlaps another line drawn earlier, there is no visible change in the colour at the intersection.
If I draw the line differently, not using an array of points, the alpha is not ignored.
ActionScript Code:
public function render(e:Event):void
{
if (segmentsCollection.length > 0)
[Code].....
This all occurs on each ENTER_FRAME event until the array is emptied.
I have tried loads of options but the alpha is always ignored.
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Jul 21, 2010
I am trying to create a mindmap where the user can drag points about the screen. I have gotten as far as drawing the line via actionscript, and drag+drop the points (defined as movie clips on stage). This is the existing script - I don't know how to get the lines to follow the points. Something to do with ENTER_FRAME or updateAfterEvent?
var line:MovieClip = new MovieClip();
line.graphics.lineStyle(1,1);
line.graphics.moveTo(ptOne.x,ptOne.y);
[code]....
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Dec 1, 2009
I have 2 points you can drag. A draw a line between them. I have a textbox that displays the distance between the 2 points. How can I have the textbox "attach" itself to the midpoint of the line and stay there as the points are dragged?a file is attached and you can see it here [URL]
PHP Code:
var item:MovieClip;
var dragOffsetX:int;
var dragOffsetY:int;
var itemOffsetXY:int;
[code]....
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Oct 19, 2005
I'm working on this sliding bar navigation thing , and I'd like to make the bar "snap to" certain points along the line.
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Nov 8, 2010
This is actually more a math problem, but maybe some of you are better at math and have an idea on how I should be approaching this.
I'm dynamicly creating circles in my actionscript project and what I want now is calculate their x- and y-positions. I want them to be positioned in a circle, with the condition that it shouldn't matter how much circles I dinamicly load. (I'm having a hard time translating my problem to English, so I'll add an image so you instantly see my problem.) Does anybody have an idea on how to calculate this? What kind of formula should I use?
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Jun 18, 2008
I am following a good tutorial here:URl...And it uses the following example file to display an embedded FLV movie:URL...I am having a problem editing the cue points. If I open the compenent inspector for the FLVPlayback, and then open the cuePoints dialog, I should be able to add, remove, or modify cue points. However, I can't edit anything in the dialog at all. It seems locked.The tutorial clearly states you should be able to edit the points.
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Jun 18, 2008
[URL]In the tutorial, it says I should be able to edit cue points for the FLV video. I open the component inspector and the cuePoints dialog. All the cue points are listed, but it won't let me edit them. They seem ti be locked. I need to be able to edit cuepoints within flash for a linked flv file.
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Jun 18, 2008
I am following the tutorial here at URL...and it links to the following tutorial file:URL...In the tutorial, it says I should be able to edit cue points for the FLV video. I open the component inspector and the cuePoints dialog. All the cue points are listed, but it won't let me edit them. They seem ti be locked. I need to be able to edit cuepoints within flash for a linked flv file.
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