Actionscript 3 :: Calculate Intersection Between Shapes In Flash?
Dec 24, 2010
I need to calculate the intersection between two shapes in flash / action script. The problem is I can't access the shape's nodes and segments, and their coordinates, so there's no way I can calculate this. Do you know a way?
edit: further explanation: I imported irregular polygons from an EPS file to a movieclip with shapes in it.The mathematical solution to the problem is trivial, but to do that, I need to access by AS code to the coordinates of the nodes that make up the polygons, which I tried with no success. That is what I'm trying to accomplish.
edit2: dismiss this question. It's not possible. The workaround I'm applying is to save the polygons in SVG and parse them to get a list of nodes. then will feed that list to flash to calculate the intersection and areas on runtime.
I have a question about shapes (i mean the flash.display.Shape class). Is it possible to import Shapes directly from the library as Shapes and not as Sprites/MovieClips? Shapes are supposed to be faster than MovieClips/Sprites, right? So why is it only possible to import MCs/Sprites from the library? I understand that generally shapes could be created solely by actionscript, but in my case the shape comprises of many points and is curved - so it's quite infeasible.
Is there maybe some sort of plugin to generate code that would draw the desired shape from a drawn shape in CS4? And a last one: Are there any benchmarks out there for performance comparison between sprites/mcs/shapes? How much performance do i loose by using a sprite instead of a shape?
I as this working in AS2 and need to update to AS3...shows that AS3 doesn't like sloppy coding. Here's what I need: I pull data from an XML and that works when I put the data into a dynamic text box. However, I can't seem to get the date of birth into a variable. I have some code that calcs age in years but uses a string literal that I thought I could just replace with a variable from my XML...ain't a workin'. Here's the code I have:
as possible because I'm having a competition of some sort of..... In Flash Action Script Language Form the code of Vector Intersection will be in this way:
Code: v3={vx:v2.p0.x-v1.p0.x, vy:v2.p0.y-v1.p0.y}; var t=perP(v3, v2)/perP(v1, v2);
I'm trying to improve upon the hitTest() function.I have a game in development that involves square robots, rectangular wall shapes, and line segment shots rotating and moving around. Without the rotation, hitTest works fine, but with rotation, problems arise.Walls at rotation 0,and square robots work fine. There is a small amount of funkyness with a rotated robot by a wall corner, but it's not very noticable.The big issue is collision of two rotated square robots.
I can create a function to get the line segments that make up each robot, and the check to see if any intersect. This will mean finding the location of eight points (using height and width and some trig to deal with rotation), finding the slope of eight lines, and then testing lines for intersection up to 16 times. This would be needed to find the intersection of each pair of robots. Those are worst case numbers, some colisions can be detected or ruled out before getting that far in the algorithm, but this check would need to be run every frame against all robots and walls and shots (shots could be a single line segment, though)Right now I'm talking about 8 robots max, maybe 6-20 walls, maybe 5-80 shots on screen @ 30 frames a second.
This is easy enough to create, but before I spend a day coding it all, I'm wondering if the computation requirements are going to make it prohibitive.(If so, I'll probably have to switch to circular robots).I feel like there should be a simple formula to find if two rectangles on a cartesian plane intersect, but I can't find one.
I am currently working my way through a book on Game Programming in Actionscript 3, and have gotten to a formula required for collision detection on finding the intersection point of two vectors. Im not sure if the author uses vectors in the strictest definition, but the convention he uses is e.g for a vector V1 :
V1.a is the start point of the vector V1.b is the end point of the vector V1.ln is the vector perpendicular to V1 (its 'left normal') V1.vx is the difference between the x coordinate of V1.b and V1.a V1.vy similar to vx V1.dx is the same as vx , but for V1 scaled down to a unit vector (the direction vector) Now,in the example we have V1 which is the motion vector of the ship, and V2, which is the target vector (i.e the line the ship is going to collide with at some point)
In order to calculate at what point on V2 the ship will collide travelling along motion vector V1, the book gives the following code using the "perpendicular dot product" (Which i have not come across before) and creating a third vector V3 between the start point of V1 and the start point of V2 (V1.a and V2.a):
There is some information but I couldn't figure it out:How can I detect if a line intersects with a triangle ? And how can I detect the point of intersection in AS3 ?
I am plotting an AreaSeries and a LineSeries on a AreaChart using Flex 3 in built chart components. I want to code a custom item renderer for LineSeries to be shown at the intersection points where LineSeries crosses AreaSeries.
I have an equation for a parabolic curve intersecting a specified point, in my case where the user clicked on a graph.
// this would typically be mouse coords on the graph var _target:Point = new Point(100, 50); public static function plot(x:Number, target:Point):Number{ return (x * x) / target.x * (target.y / target.x);
I have a flash website template, Fla File as well as all the source files etc, I have some questions if anyone would be kind enough to help. I am new to Fla files so not sure what to do.
There is some text I managed to edit ok, but others I could not, it appears as if they started as text and have been broken apart and made into a shape? when i click you can only highlight each letter, but not change them. There are two of these, one flies in from left, the other from right.
One thing that seems particularly easy to do in the Flash IDE but difficult to do with code is to outline an organic shape. In the IDE you can just use the inkbucket tool to draw a stroke around something. Using nothing but code it seems much trickier. One method I've seen is to add a glow filter to the shape in question and just mess with the strength. But what if i want to only show the outline?What I'd like to do is to collect all of the points that make up the edge of the shape and then just connect the dots. I've actually gotten so far as to collect all of the points with a quick and dirty edge detection script that I wrote. So now I have a Vector of all the points that makeup my shape. How do I connect them in the proper sequence so it actually looks like the original object?[code]
I am new in Graphics and Multimedia Programming and I use Adobe Flash CS5 Professional V11.0 to edit and create some short flash movies.I have an old flash movie which is created by older version of Flash (Macromedia Flash 10 or 8). This falsh movie needs modification because it has some typing errors.
I had a rendered Flash movie (.swf) that I converted to its original format (.fla) with its associated resources like Action - Button - Font - Frame - Image - Shape - Sprite using a Flash decompiler software.
I have edited the shapes which includes the errors by my flash software and save it using the available formats which are CS5 or CS4 which are only allowed in saving options.
I took copies of the old edited shapes and replaced them with new correct ones but when I publish the file to be in *.swf format or expert it to flash it did not work as they are not there at all.it may be a type mismatch but I downloaded and installed old flash software version (Macromedia Flash 8.0) to read and publish them but it gives file reading error and was unable to read or manipulate them at all.
I tried a program that replaces specific shape or all flash shapes but it did not see that also and it is used only with *.swf format.Is there any way to convert or treat shapes in flash as text ?
I searched the web for that but most results coming talks about Shape tweening and I did not find what I want.How I can change the mistakes in these flash shapes and leaving the other things as they are like the action script and the timeline used as I only want to replace these wrong shapes ?
is it possible to give a shape...a bevel?.....I would like to have a shape tween with a filter...lets say i had a circle turn into a square...is there a way to have a filter on it the whole time?
Here's my basic issue: I have a movieclip, with several hundred shapes inside of it that I drew with the brush tool.
I want to convert each one of those shapes to a movieclip. I could individually select each one by hand, convert it to movieclip, and then have a massive library. That would be a hassle to do, and really difficult to manage going forward and making changes.
I'd rather do something like
Code: for each (var curShape:Shape in myMC) { var newMC:MovieClip = new MovieClip
[Code]...
and then I could access them as MCs henceforth (for collision detection, mainly). That code does not work though!
how to convert every individual shape inside a MovieClip into a MovieClip using AS3?
I haven't used Flash for sometime. Trying to get back into it using version CS5. When creating any animation, don't you always save your shapes as symbols? I was trying to do a simple shape tween but it won't let me if I convert my shapes to graphic symbols. I'm assuming then that this isn't the case?
One other thing... In earlier versions the animation options appeared in the Properties window. This doesn't seem to be the case, any tweens I select I've had to go to Insert...
I want to calculate the parsing time.... package { import flash.display.MovieClip; import flash.net.URLLoader; import flash.events.Event; import flash.net.URLRequest; public class Graph extends MovieClip { [Code] .....
I use this script currently to determine the difference between two dates:
[Code]...
The problem with this is I want to monitor the actual physical day change so if someone accessed the application at 11:59 PM and then came back 5 minutes later this would register as a 1 day difference (a new day), this current script requires atleast 12 hours to have passed between two dates for it to register as a new day.
I have thought about using the date number etc, but because months and years are so different it is quite a complex route, there must be something simpler.
Flash CS5 is the first version I've used since 8 Pro, so I'm new to the IK tool and adding bones to clips/shapes. I'm experiencing problems when saving/loading files that have armatures in them. I have made several characters now with bones attached to their limbs, which are shapes (not symbols) each on their own layer. At first the animations seem to work fine, and I can export a test SWF with no trouble showing the animation as it should be.
However, returning to the FLA after saving and closing it produces some unusual effects. For example, the shapes will disappear from the stage/clip and the only way I've found to get them to reappear is to select them via the timeline or their (barely visible) pivot point, then deselect them, then undo these actions and for some reason they appear again! More worryingly, sometimes the armatures will take on shapes from different layers, meaning, for example, I end up having figures with two right arms, even though the limbs and their corresponding shapes/armatures are on completely different layers. I have not found a way to undo this, so I have to start some of the limbs from scratch, then make sure I've published/exported all the necessary files before I need to close! m experiencing problems when saving/loading files that have armatures in them. I have made several characters now with bones attached to their limbs, which are shapes (not symbols) each on their own layer. At first the animations seem to work fine, and I can export a test SWF with no trouble showing the animation as it should be.
However, returning to the FLA after saving and closing it produces some unusual effects. For example, the shapes will disappear from the stage/clip and the only way I
When you use Graphics object to draw very large shape(that does not fit in 10000x10000 pixels) stroke width may become much wider than value specified in lineStyle function.For now I have only two options:
1. When drawing line you can split it into several lines. However this trick does work only for drawing lines, polylines and polygons. There is no way to apply this to drawing circles and ellipses. Well, we can approximate circles via bezier curves, but this approach seems to be very inefficient.
2. Perform manual cliping. But this require manual implementation of different cliping techiniques, and I think ActionScript does not suit well for this sort of task. And again there is need to approximate visible parts of large circles.
Finding the intersection point of 2 line segments is easy enough.
But now I need to test wether a line with thickness intersects another (non-thick) line.
My idea is to actually perform 2 tests, one at the top and bottom of the thickness of the line. Does that make sense? Is there a better way to do it? I dont need the intersection point, just a boolean yes or no.
my concept was I have webcam. My webcam is able to catch an image. Whereby, the flash will calculate the overall color of the jepg. And it will resize and place it to the nearest color of the main background color.
