I have a rectangle of any arbitrary width and height. I know X,Y, width, and height. How do I solve the upper right hand coordinates when the rectangle is rotated N degrees? I realized if it were axis aligned I would simply solve for (x,y+width). Unforunatly this doesn't hold true when I apply a transform matrix on the rectangle to rotate it around its center.
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i need to check if a point is within a rotated rectangle. I have to do this mathematically, as none of the objects are on the stage so i can't use hitTestPoint. I know the position and rotation of the rectangle, and if necessary can get the four corners as points as well.
I kind of feel silly asking this, because i am pretty sure it's not a hard thing to do, i just can't work it out and so far any google searches just bring up hitTestPoint.
I want to learn how you can change the registration point for the Canvas.I want to make a zoom of this component, but the point registration in the upper left corner! How do I move to the center?
View 3 RepliesI want to learn how you can change the registration point for the Canvas. I want to make a zoom of this component, but the point registration in the upper left corner! How do I move to the center?
View 3 RepliesI'm using following code:
ActionScript Code:
var bd:BitmapData = new BitmapData(stage.stageWidth, stage.stageHeight);
bd.draw(stage, null, null, null, new Rectangle(tmpX - (tmpW/2), tmpY - (tmpH/2), tmpW,
[code]....
I have two rectangles: var rect1:Rectangle = new Rectangle(66,147,89,67);
var rect2:Rectangle = new Rectangle(155,147,89,67);
How to calculate the centre point of these rectangles based on their x and y positions. I want the centre point to be calculated with relative to stage
Do you usually set the registration point in the upper-left corner ?I usually have always troubles with the registration point in the center.. or is maybe useful in any situation ?
View 1 RepliesThe link elements I'm talking about are single words, so they are not wrapped inside the container, which means that they should have a single bounding rectangle. But how do I go about finding this rectangle? I'm familiar with Flex3 but don't know enough about the new Text Layout Engine in Flex4.
View 1 RepliesI am using the following to rotate a textfield from its top right corner, I would like to know the best way to find the point of the top right corner.
[Code]....
I have two sprites that are drawn as rectangles. I want to know if the rectangles are intersecting. I run into trouble when the objects rotate.
View 2 RepliesI have two circles, an inner circle and an outter circle. I'm trying to find points that reside within the area between the edge of the inner circle and the edge of the outer circle.
View 1 RepliesI'm having trouble with this code
var imageMap:ImageSnapshot= ImageSnapshot.captureImage(object);
var pixelValue:uint = imageMap.bitmapData.getPixel(x, y);
I need to know what side of a rotated box my sphere/point is colliding with and at what angle.
I could perform the 4 lines check but I think it will be too cpu consuming. I need it for fast simple physics simulations(bounces)..
if i have a movieclip or a sprite could i find (via code) where is its registration point compared to its top left point (no rotation included) ?
View 4 RepliesI know some basic trig. but how do i find an angle from an anchor point and a moving point?
adjecent = _root.anchor._x-_root._xmouse;
opposite = _root.anchor._y-_root._ymouse;
hypotenuse = ((adjacent ^ 2)+(opposite ^ 2)) ^ 0.5;
I have a Movieclip (MC1) with and moving object (OBJ1) inside it and using AS3. I want to do a hit test on it with another object (OBJ2) that is on the stage. Normally I would just do MC1.x + OBJ1.x to get my coords for the hit test. But how do I do it if MC1 has been rotated?
View 2 RepliesI'm drawing a 3D pie chart that is calculated with in 3D vectors, projected to 2D vectors and then drawn on a Graphics object. I want to calculate the most left and right point of the circle after projected in 2d. (So not 0 and 1 Pi!) The method to create a vector, draw and project to a 2d vector are below. Anyone knows the answer?
[Code]...
i cant get "on stage" bounds of sprite that rotated in 3d space
Code:
var draggableContent:Sprite=new Sprite();
var _3dContent:Sprite=new Sprite();
var _child3D:Sprite=new Sprite();
[Code]....
The AS3 getBounds function returns a rectangle that is not fitting tightly to a rotated ellipse. Instead it returns an axis-aligned rectangle based on the bounds of a rectangle whose width/height corresponds to the max/min diameter of the ellipse and follows its rotation.
Stack Overflow Q/A about the math of ellipses and bounding boxes
Based on this I took a stab at coding a solution in AS3. So far I have been able to produce a rectangle that fits perfectly along the x-axis, but as I rotate my ellipse it acts very weird along the y-axis. Rather than alternating between 2*r_min and 2*r_max while rotating, it alternates between 2*r_min and 0. My best guess is that I have done something wrong when solving the differentiated t for gradient -> infinity...
Here is an example from my code:
var r_max:uint = 45;
var r_min:uint = 20;
var rot:Number = ellipse.rotation * (Math.PI / 180);
var t_nil:Number = Math.atan( -r_min * Math.tan(rot) / r_max);
[Code].....
I'm trying to create a drag-to-select feature. Basically, I'll have several dynamically created mc's and want to be able to click and drag to select several of them at once.I have it so I can drag to draw a square and I have the x/y coords of my mc's. My question is, how do I tell if the x/y coord of the mc is found within the area of the square?
View 7 RepliesWhat I need to do is find the rectangle of a rotated rectangle. I have a house that is diagonal and I need to find the rectangle of the bottom of the house so I can check for collisions. I was hoping to use the rectangles to find intersections. Something like - if (playerRect.intersects(houseRect.bottom){ do something };Every time I try to get the rectangle of a rotated rectangle, all I get is the bounding box which is not rotated.
View 4 RepliesI have a BitmapData with 2 red circles. I want to find the rectangle area or each circle. If i use [B]getColorBoundsRect[/B] I get the smallest area enclosed by the 2 circles. How can i go about this and get individual area of the circles?
View 1 RepliesI have the following code to create a Sprite with a rectangle in it:
container = new Sprite();
container.graphics.beginFill(0x00CCFF, .5);
container.graphics.lineStyle(1, 0x00CCFF);[code].......
The only thing is, I'd like the registration point to be in the middle (not the top left corner). Is there a way to set up the registration point in the middle of the rectangle, but still have the position of the rectangle be correct?
i.e. not moved over so that the top left corner of the rectangle is in the "middle" of where I want the rectangle to be...
I want to make an editor like this site. [URL] If you browse this link you will find "Button. If you press this button you will navigate to a editor to design your layout. After draw a rectangle or circle or line you can resize that or can rotate that. When you finish if press the "you will back to the previous page where your desinged layout display. If you press the "" again then you will navigate the editor with the previously designed layout. I want to make a site like this. I want to use the flash cs4 to make the editor. Anybody knows how to draw a rectangle or circle shape with mouse and how to scale by setting the point and how to rotate by setting the rotation point also by using flash cs4 and as3?.
View 3 Repliesi am trying to find center point of my pie.
var myTween:Tween = new Tween(piechart,"............", Strong.easeOut,1200, 510, 1, true);
i want to animate from the center and it has a xml driven data file.
I'm not a genius in geometry, I'd like to find a point in as3 with the radius and a angle but I don't remember the rule, I know this should be simple!
View 3 RepliesI am currently looking at a way of visualising data and a part of the algorithm needs something 99% the same as A* Path Finding but I cannot wrap my head round it fully. I know it will be a fairly simple modification. (specific cost instead of least cost)
Basically I need to plot a path (2D Grid, no Diagonals) from point A to point B in X number of steps.
E.g. If the start and end points were right next to each other and I needed the path to be 3 steps it would have a tiny loop. (moves: up, right, down). Is there a known name for this algorithm or is the use of this so rare it's uncommon? I am currently looking at this AS3 Librbay for modification as it is apparently very fast and seems clean and simple to me:[URL]..
I once needed to pan a sprite full of movieClips (picture 1) which were draggable with no bounds so you could drag them up and left (higher than sprites registration point).
You could also drag them down and right and expand a sprite that way (as well) but that didnt matter.What did matter was how much is 'up' and 'left' from the sprite registration point so i can include that in my formula for panning.
This was easy to find, i just sorted my array of movieClips, sorted on x and sorted on y after each drag, and thats how i got my up and left points.
Now I am trying to do that same thing, exept my movieclips inside a sprite have a custom rotation (picture 2), so i also have an up and left point, except this time up and left are caused by rotations of movieClips inside a sprite... (and these are dragable as well with no bounds)
To 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
How could I find the distance between a given point and a drawn line? I was thinking about using the point-slope formula to draw a perpendicular line between the point and the line and measuring it as the distance, but I'm not quite sure how to do this in as3.
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