I need to find the position of not-keyframe points in a motion path drawn on the stage.
What I can do is to find the position of the mc that is following the object at every frame (red dots) but I don't know how to access the MotionPath data to try to calculate intermediate positions.
One of the option is to create your motion path Pro grammatically check this example
Create a Motion Guide Programmatically
Another option if you want to continue working with path tool in flash , is to work on timebased instead of framebased
Related
When you're using the Flash/Animate IDE and you select something on the stage with the Free Transform Tool, then move the transformation point (the white circle), what is it actually doing in frame script? DisplayObjects only have x and y properties, there's no transformX or transformY.
I have a MovieClip place on the stage through the Flash IDE with various transformations applied to it, and I would like to be able to replicate those in Actionscript.
When you're creating a display object in IDE, moving transformation point makes IDE move everything inside that object in reverse direction coordinates wise. It's like if you're moving a zero point of a local coordinates system, leaving everything else intact, the contents will then have their coordinates altered.
In order to simulate this behavior, you can nest your display object being created into a container sprite, then when your user drags transformation center, you move the wrapper sprite to the new coordinates and alter its nested object's ( the one with all the contents) coordinates by negative delta between old and new positions of virtual zero.
I am using Flash CC.
I have drawn 7 rectangles using the Rectangle Tool.
I then converted the 7 as one movie clip (By hitting F8).
The Problem:
I want to be able to iterate through these shapes and move each individually.
However the 7 rectangles seem to be encapsulated into the ONE shape and I can't access them.?
If I use .numChildren on the movie clip, it returns 1.
If I use .getChildAt("anything > 0") its a null reference exception.
Please help,
I don't understand how this is so difficult.
I have searched for ages to find the solution to this and for the life of me I can't.
Thanks in advance.
(P.s) Instantiating the rectangles in code works, but I need to be able to do this via Flash CC as I will be importing artist material for manipulation.
Your best choice is to make every shape in your made movie clip a movie clip as well.
In Flash go into your made MovieClip (I will call it containerMC for easier understanding) and make every shape a MovieClip by hitting F8. You can also give them instance names, if you want, just make sure they're unique.
Then your containerMC will return numChildren value 7 in your case.
You can move/access your shapes in the containerMC via getChildAt(), or by using their instance names that you've provided via containerMC.instance1 or containerMC["instance1"].
We have a flash application that we are planning on converting to javascript. It's a pretty simple map application with an image as the background and a bunch of simple polygon movie clips that represent destinations on the map.
I would like to iterate through each movie clip and extract the shape into an array of x,y points to redraw the polygon using an external javascript function.
Is this possible with actionscript?
If you want to export the shape coordinates at author time, you can do try the JSFL script recommented by #strille or this one or export transparent images (if that's not too limiting for your application).
If you need to export the shapes at runtime, you can use the awesome as3swf library to decompile the swf and export the shapes. Have a look at the ShapeExport wiki as there are couple of handy exporters for js like JSCanvasShapeExporter and the more generic JSONShapeExporter
There are ways you can read the coordinates from an SWF. For instance, I've written a parser in PHP (link). Getting the data doesn't help though, as it turns out. The Flash painting model is different enough from the HTML5 one enough to make transfer exceeding difficult. The main obstacle I discovered is that in Flash, a path can be filled with two fill styles: one for area enclosed by the path, the other for enclosed area considered to be "outside" by the even-odd rule (e.g. the pentagon in the middle of a star). Since the HTML5 canvas let you specify only one fill style, you can't redraw shapes from Flash accurately. I was trying to create a tool that extract shapes as SVG and was getting a lot of gap and holes in the result.
Flash Player 11.6 introduced readGraphicsData() which does exactly what you ask for.
If you need to target an earlier version, then there's no simple way to read shape coordinates from a display object with ActionScript at runtime unfortunately.
If you just want to extract the shape coordinates once someone has written a jsfl script for Flash CS3 which looks like it might be able to help you out.
I'm now working on a painting app. It uses a html canvas. Users can draw shapes on the canvas.
Now a problem comes to me. I want to select the line that I drew on the canvas. When it is selected, I can drag it or delete it. How can I implement it ? Any good ideas?
It might be worth your while to have a look at https://github.com/canvimation/canvimation.github.com this contains the source code for a drawing application using canvas.
You should note that this application is being re-coded but there is not yet a working version using the new code on line. The new source code is in the stage1 branch. Hopefully this new code is easier to understand than the old code and the code referred to below comes from the stage1 branch.
Basically a shape object is created for each shape drawn which includes all data about eh shape, including path data and data giving the rectangular boundary around the shape. When the "boundarydrop" div is clicked then function checkBoundary is called and data about the shift key and cursor position are passed. Then for each shape the first check is to see if the cursor is within the boundary of the shape and if so then a more refined check is carried out. For a closed shape the check is if the cursor in inside the shape and for an open shape if the cursor is close to the path.
There are further complications depending whether the shift key is held down or not and which group the shape belongs to. However the basics are there.
Functions to check out
in index.html
shiftdown
getPosition
in scripts/drawboundary.js
checkBoundary
isIn
isOn
in scripts/shape.js
shape
A working online version of the application is at http://canvimation.github.com/ but this uses the older code in the master branch and there are some bugs but it will give you some idea of what the application does.
Hope this is of some help
There is a library called kinetic.js, with it you can keep track of the shapes you draw on the canvas with the select feature.
Here is the link: https://github.com/ericdrowell/KineticJS
I am making a flash app where I want to have a user defined viewport like the stage in the flash IDE which the user can use to define objects that have a starting postition somerwhere off or on the stage and an ending position either or on or off the stage with the object then tweening between the two points.
My question is this: I want the user to be able to define a curved path for the object to tween along. Is there a library of code that I can use to define curved paths for the app?
Ideally I would like something similar to the functionality available in Flash, so a bezier curve sort of path that is subdivided into handles that can be dragged to define the path of the tween.
If there isn't an existing library, then do you know of the functions that I would need to define (mathematical equations related to drawing curves etc)?
Many thanks
You could use TweenMax with the BezierPlugin
Or define the path elsewhere and use LinePath2D