Point Of Starting And Ending Of A Line?
Aug 23, 2009I have problem in fixing a starting and ending point of a drawing line, looking for assistance
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May 10, 2011I have drawn a series of lines using flash's graphics.lineTo command, and placed them in an array to be referenced later. Based on certain user interactions, the clips that hold these lines can be shifted to the right, causing the lines to move with them, no longer connecting to the point they originally connected to. So I need to extend the lines by the amount their parent clip was shifted (I've called this incVal). So what I need to do is find the point at which each of these lines ended at, and draw from that point to the left by incVal. How do I get that ending point of the line?
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[
{
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...
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solution pls...... Code:
[Code]...
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[Code]...
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Jul 2, 2011Line is defined by two 3d points; (0,0,0) and (x,y,z). And there is also this 3d point. How can rotate this 3d point around the line?
Something like this (points indicate vectors in my expression, it's the same thing) :
I found some stuff on the internet but I couldn't really figure it out.
Flash :: Reflection Of A Point Over A Line?
Aug 4, 2011I have been looking at how to reflect a point in a line, and found this question which seems to do the trick, giving this formula to calculate the reflected point:
Given (x,y) and a line y = ax + c we want the point (x', y') reflected on the line.
Set d:= (x + (y - c)*a)/(1 + a^2)
Then x' = 2*d - x
and y' = 2*d*a - y + 2c
However there are two problems with this implementation for my needs:
My line is not described in the form y = ax + c (so I'd have to translate it, which is easy to do, but it means the process is slower). What if a is infinity ie. a vertical line?
Is there a simple way to calculate (x', y'), the reflection of point (x, y) in a line, where the line is described by the two points (x1, y1) and (x2, y2)?
Edit:
I've found a formula which does this, but it seems as though it does not work with lines that look like they have equation y = x.
Here it is in actionscript:
public static function reflect(p:Point, l:Line):Point
{
// (l.sx, l.sy) = start of line
[Code]....
ActionScript 3.0 :: Origin And End Point Of A Line?
Feb 14, 2011Can anyone tell me if an instance of a line as origin point and end point properties that can be read or changed? I know that if you create a line with actionscript you have to set them. But can the X and Y coordinates of the points be accessed once the line exists and moved to a different location?
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Dec 11, 2010is there a short hand way to reassign a point in 1 line?
something like:
Code:
var p:Point= new Point(0,4);
p= [5, 10]; // doesn't work
i know you can just say
p.x=10;p.y=40;
but when auto formatting it will drop it down to 2 lines
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Feb 19, 2011I am trying to make an animation where there are several locations(say A,B,C,D,......) made on a map. If a person clicks on one location A and then another location B, I wanted to draw a dotted line from point A (from destination of the plane) to point B (to destination of the plane) using AS3.
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Aug 22, 2009To make this easy, lets say I have a movie clip with a diagonal line in it (top left to bottom right).
I want to start my y position at 0, and place it in a loop and increase y by 5 every time. So we start at the top left of the clip, and move to the bottom of the clip.
Now since we have our y value (0, 5, 10, etc.) would you get the x position of the line? such as (x, y):
5, 10
or
42, 15