Given a MovieClip containing a vectorshape (loaded from the library) - is there a way to check whether a line (from point(x1,y2) to point(x2,y2) intersects this shape?
View 1 RepliesI'm making a very simple game that lets you draw a curve by hand (using lineTo to the mouse position on mousemove) but now, I need to check wether the line intersects wiith another part of the same line (e.g. a loop)
I first used an onrollover command, and that worked, but not always because the mouse moved too fast (same with hittest with mouse). Then I pre-drawed the line in another mc, used hittest on it, and if it wasn't intersecting, draw it in the real mc. But that didn't work because it used the bounds to test. I guess the best way is to use some mathematical formula, but that would mean I have to save all my coordinates in an array..
This should be a bit of simple geometry: How do I calculate the points to draw the lines in the code below so that it makes a 2D cone or wedge shape?
import flash.geom.Point;
//draw circle
var mc=new Sprite()[code]...........
UPDATE:I should have mentioned my aim is not to draw a wedge shape, but to draw a line from a random point to the edge of an existing circle.If you're more comfortable with algebra than actionscript,
Lets say I have two objects, and I want to use action script to draw a line connecting them, which will update automatically as they are moved/ dragged.Can anyone show me how to do that, and also how to control line's parameters like colour, weight etc?
View 1 RepliesI am using flash as3.I have some shapes I have drawn on the screen. They are made using:
graphics.beginFill(0x00ff00);
graphics.drawRect(0,0,50,50);
graphics.endFill();
to draw them. Each shape has a different color for fun (different beginFill).How can I get the color of the shape under the mouse pointer as I move the mouse around the shapes?I see two choices so far but don't know how to do either of them: Get color under the mouse point get the color from the shape properties (preferred)how to do either of these...
I am using AS2 with Flash 8 Professional So, my problem is that I currently have a man in the middle of the screen, who shoots a line towards the mouse when I click. However, when I use hitTest to see if the line collides with another object, Flash recognizes the line as a large box if it is diagonal, so the hitTest isn't very accurate. The line only satys there for one frame, so I can't have the usual moving-bullet-style. I am either looking for a way to create an imaginary line with AS from the starting point to the mouse and beyond, and tell whether or not this line intersects with an object... or some other way that I haven't thought of to fix my problem. Keep in mind that the line rotates from a center point towards anywhere around it for 360 degrees.
View 1 RepliesHow can I move a point (or circle) slowly and the point let behind a line.When the point turn back the line will be erase.
View 8 Replieshow 2 sript: to draw a line ( 4 example ) frm point A to point B and then code it such that the viewer can see the line being drawn ?
View 9 RepliesAlright, so I've been struggling with this one since last night. When I create a new object (a new unit), and draw it to the screen (Flash does all the work there), the point at which it's first placed is considered its origin. That is, getX and getY will return the distance from that point... Why is that? Or how can I stop this?
[Code]...
I am developing a white board application which allows the user to draw line with arrow head (some like Microsoft Word line with arrow feature). I am using graphics property along with lineTo() method to draw a line. Now i have to draw a angular arrow on the last point of line. I am drawing the arrow by connecting the points around last points. As 360 line can pass through this point and each line can have a different angle of arrow.
View 1 RepliesHow do shape tween shapes that I created using the line tool? when I try to tween it, it changes into some random shape during the tween.
View 1 RepliesI have a line randomly being drawn and moved across the stage. Here is the code:PHP Code:
import flash.display.Sprite;
var xValue:Number= 0;
var yValue:Number = 150;
[code].....
I 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]....
I 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?
This is my code:
To draw line and add it both to the clip and to an array for future reference:
line.graphics.lineTo(localPoint.x,localPoint.y-10);
membersRef.addChild(line);
parallelArr.push(line);
[Code]....
I've for a while now been trying to work out an efficient way to see if something is in something else's line of sight. A good example is having a sphere that fires a rocket at you if it can see you - but obviously not if you're behind a wall.
Here's how I generally went about doing this:
function cast(end:GameObject, walls:Array, accuracy:uint=10):Object
{
var xp:Number = skin.x;
var yp:Number = skin.y;
[Code].....
Works, but as we know this will get extremely slow with each new rocket added or as the amount of impassable objects increases.
I'm assuming there's a really simple efficient way that I'm missing - I mean, all games do it (Diablo, etc) with hundreds of enemies that don't do anything unless you're visible.
Is there any way to get the positions of points in a shape on stage at runtime? for instance a triangle, is there any way to get the positions of the 3 points that make the triangle?
View 2 Repliesdraw a shape on the stage, make it into a movieclip, registration point wherever, tl is fine, name it mc, and put his code:
trace(mc.getChildAt(0).y);
now get inside a movieclip and move that shape around (away from registration point) for example above registration point, or wherever and output will always be 0.
I draw a shape,like follows:
var shape1:Shape;
shape1=draw();
addChild(shape1);
shape1.rotation=50;
[Code]....
Then I want to rotate the shape at it's center point(200,202) by using shape1.rotation=50,but I find the shape don't rotate at the the center of it's shape. How to realize the function which make shape rotate at its center point?
Let's say i have a simple app where on mouse move user draws a shape. What i am trying to accomplish is to detect if drawn shape is circle so was wondering what would be the best or easier way to do that?
I believe i should do some math based on every drawn point X,Y coordinates but i need a push in right direction from more experienced people around.
i can set color of shape easily via shape.transform.colorTransform..... etc its unbeleiveable, what color is already filled in a shape??
i know, i can draw a bitmap on top of it and get pixel data from that... but
1- it seems lengthy approach ( lazy enough, don't want to write few more lines)
2- it confuses, because if i don't want to get color from pixel but i know one flat color is filled?? but shape is strange / arbitrary / random... how can i confirm that specific pixel has some color or not??
i just wanted to know what flat color is filled inside a shape(very edgy...)
I'm trying to create a shape tween to take a line from a point to another point. I can get it to work if I leave the line short but if I try to take it to a point the shape tween doesn't work.
View 1 RepliesI“d like to know if it“s possible to find a minimum y point (where the shape ends) of a shape, in a given x coordinate.
Example: I have a complex shape like a big "S". Suppose the "S" minimum x coordinate is 0. How can I find the minimum y point of the "S" (again, where the shape ends) in the x coordinate of 14?
Here is the image: I need to find the y coordinate (or point) of the blue point in the image.
I need to have 2 kinds of masks, one with a registration point in the top left so that when I tween its height it expands downwards, and one with a registration point in the bottom left so that when I tween its height it expands upwards?how do i do that, with code ofcourse?i have made something but i dont know if its the right way:(this expands downwards, but i dont know how to get it to expand upwards)
Code:
import gs.TweenLite;
var subMask:Shape = new Shape();
[code]......
i have a class that creates circles randomly placed at stage, i want then to move those circles and make them bounce off the stage, i know how to do that, the problem is that when i add a new shape into my stage, that shape, has an "x" value of 0, no matter where it appears, how can i check the real "x" value of that shape within the stage, so i can continue with the bouncing check...
ActionScript Code:
package
{
import flash.display.MovieClip;
import flash.display.Graphics;
[code]....
so i just want to know the "real" "x" and "y" positions of my Shape attached to stage to attach a ball to stage i use the createBall method called from my fla....
I have a single point and a set of shapes. I need to know if the point is contained within the compound shape of those shapes. That is, where all of the shapes intersect.But that is the easy part.If the point is outside the compound shape I need to find the position within that compound shape that is closest to the point.These shapes can be of the type:squarecirclering (circle with another circle cut out of the center)inverse circle (basically just the circular hole and a never ending fill outside that hole, or to the end of the canvas is there must be a limit to its size)part of circle (as in a pie chart)part of ring (as above but lineThe example below has an inverted circle (the biggest circle with grey surrounding it), a ring (topleft) a square and a line.
If we don't consider the line, then the orange part is the shape to constrain to. If the line is taken into account then the saturated orange part of the line is the shape to constrain to.The black small dots represent the points that need to be constrained. The blue dots represent the desired result. (a 1, b 2 etc.)Point "f" has no corresponding constrained result, since it is already in the orange area.For the purpose of this example, only point "e" is constrained to the line, all others are constrained to the orange orange area.
I am trying to draw a line that goes from point A to Point B. Along the way there are objects (of any shape) that force the line to go around them in order to reach point B. It cant go through them. This is like directing someone using a map. You can only draw a line between the blocks / along the streets.
I tried that using collision tests. Fine, I can now find the coordinates at that instance, but I still cant get the line to go around the object before proceeding to point B.
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 have a line that is being drawn following a route when a play button is pushed. At the end of the movieclip the whole route is shown with the beginning and end. How do I clear that line if the user hits play again? Right now it connects the beginning and ending points and creates another line on top of the old one.
Actionscript Code:
var shape : Shape = new Shape();shape.graphics.lineStyle( 4, 0x9C1E26);shape.graphics.moveTo( arrow.x, arrow.y );addChild( shape );addEventListener( Event.ENTER_FRAME, loop );function loop( event : Event ) : void{ shape.graphics.lineTo( arrow.x, arrow.y );}
I am tracing a line between two movieClips (called pontoA and pontoB) using the following code:
var my_shape:Shape = new Shape();
addChild(my_shape);
my_shape.graphics.lineStyle(4, 0xFFFFFF, 1);
[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 Replies