ActionScript 2.0 :: Robert Penner Easing Equations - How To Use Them
Nov 18, 2004
I am just wandering how do i use the equations I downloaded from robertpenner.com. when ever i try even working out of the book i get error messages like **Error** Scene=Scene 1, layer=Layer 1, frame=1:Line 350: There is no method with the name 'easeOutBounce'. return(Math.easeOutBounce(t * 2 - d, 0, c, d) * 0.500000 + c * 0.500000 + b); Why does it say there is no method with the name bounceEaseOut Can someone tell me who i can use these in my flash movies. I tried everything out of his book and i still get it wrong.
But looking at the function below, how would I apply it to an MC to move its position.
// simple linear tweening - no easing // t: current time, b: beginning value, c: change in value, d: duration Math.linearTween = function (t, b, c, d) {
use Robert Penner's tweening methods? I have all the files. I understand that at the top of the actions you do include# tween.as or something like that (I just had to reformat my powerbook and haven't loaded the files back on yet to look at exactly what that line of code is).
way to use Robert Penner's tweening methods? I have all the files. I understand that at the top of the actions you do include# tween.as or something like that (I just had to reformat my powerbook and haven't loaded the files back on yet to look at exactly what that line of code is).
I am just wandering how do I use the equations I downloaded from robertpenner. Whenever I try even working out of the book I get error messages like
**Error** Scene=Scene 1, layer=Layer 1, frame=1:Line 350: There is no method with the name 'easeOutBounce'. return(Math.easeOutBounce(t * 2 - d, 0, c, d) * 0.500000 + c * 0.500000 + b);
Why does it say there is no method with the name bounceEaseOut. How I can use these in my flash movies.
im a former user of FuseKit, for the time being as i like more the performance of TweenMax over Fusekit, but i got used to the flexibility of Penner Easing Equations, is there a way to use them on TweenMax?
I tried fl.motion.easing.* seems to have all of the penner equations Expo, Sine, etc.So, is there a way to use them with TweenMax?maybe im not writting the syntax correctly i dont know here is my piece of practice code
Code: import gs.*; import mx.transitions.easing.*; import fl.motion.easing.*; function moveSq() {
Virtually the only dynamic ease-tweening you ever see in Actionscript is the ubiquitous "exponential ease-out." You know, the Zeno's paradox, go halfway every time, Barney's menu method:
distance = finalX - _x; _x += distance / 2;
It's wonderfully simple and easy to code, but it lacks flexibility. You can choose your destination, but you can't specify, "I want to get there in 40 frames." Also, easing *in* with the same method is not so easy. There are many mathematical approaches to calculating an eased tween. I've derived some easing equations using three different curves: quadratic, sinusoidal, and exponential (as well as a trivial linear equation). Each of the three curves has its own particular "style" of easing; it's quite fun to compare their aesthetics.
All of the equations allow you to specify the beginning value, the change in the value, the duration of the tween, and the current time. Note that the equations will work for both frame-based and time-based animation. That is, duration and current time can be either frames or seconds/milliseconds.Here are the quadratic easing equations. I'll post the other two sets soon.
Code:
// simple linear tweening - no acceleration // t: current time, b: beginning value, c: change in value, d: duration Math.linearTween = function (t, b, c, d) {
[code]....
Right now, the equations are all set at "maximum easing", analogous to an easing setting of 100% in Flash's Frame panel. It is fairly simple to adapt the equations so you can specify an easing percentage. Personally, I almost always use 100% manual easing within Flash.
i am builiding a photogallery where at each stage i load six thumbnails. Each "placeholder" is initially set to 20% xscale and yscale and when each thumb has fully loaded, i want to have the thumb tween from 20% to 80%. The jpg thumbs are loaded inside the placeholder.when the thumb has fully loaded, goodToGo = 110 and so i want to trigger the AS tween.[code]to get some idea of how it would look, check out URL...and click inside any of the collections.
im trying to create this custom menu a bit more efficiently. As written, it operates fine glitch free. However, id like to incorporate some easing into the movement of each movie clip.
I've built a code to cyclically move a scene on the bottom of my stage; I've done this to make a slowing-and-stop-easing effect at anytime the command will arrive. The entire scene mc is _x long something like 6000 px. The whole code goes in this way:
1) importing on the stage (with attachMovie) a mc with this code inside:
onClipEvent(enterFrame) { _parent._parent.fondo_mc._x -= countermovement; if (_parent._parent.fondo_mc._x <= -5800) {[code].....
The code goes right, but I need to improve it.Now there is just a variable, I tought to use two vars to implement the whole code in a setInterval, but maybe it's unuseful, and actually I can't use it in the right way.
Second issue: actually when slowAndStop function is called the scene slow too fast, if I take it to 15 it slow better but the scene is running too fast...
The best would be that the scene slow down and stop following: A) a temporal variable (and I can try to implement it with setInterval, that for istance is a cycle)
B) an indipendent moving variable, so that on one side I set the speed, on the other side I set the slow-and-stop in a matter of time with countermovement.I also tried to use a second variable:
var counter:Number = 15; // set the _x increment var countermovement:Number = counter/2;
I'm familiar with how to ease something in using motion math. Easing out would not be that bad either. But how would I script something easing in half way, then easing out the second half? It would start slow, gradually move faster, then slow to a stop at the end. - almost like a sine wave I guess?
I have about 15 movie clips in a movie that i want to scale with ease.Ive tried doing this a number of different ways.all of which have woked but they severely slow down the perfomance of my site.ideally i would like to use penners equations.I want to have a function on the first frame of the main timeline. i.e
I am working with this function that moves an object around a center point in a perfect circle and am trying to modify it to move it in an oval shape that is 1/2 as high as it is wide?
Basically, I have a set speed var myVelocity:Number = 0.25; Then I calculate my Sine and Cosine based on the speed var myCos:Number = Math.cos(myVelocity); var mySin:Number = Math.sin(myVelocity);
Then I figure the distance of the the object from a fixed center points along each axis and var x1:Number = myBall.x - centerX; var y1:Number = myBall.y - centerY; var x2:Number = myCos * x1 - mySin * y1; var y2:Number = myCos * y1 + mySin * x1; myBall.x = centerX + x2; myBall.y = centerY + y2;
I have another function that figures x and y based upon myBall.x = centerX + cos(angle) * radius; that is easy enough to modify the radius to become an ellipse, but is there an easy way to mod the one above to become an ellipse? I want to do this to be more efficient with the code and reduce the number of math function calls
"256 levels of recursion were exceeded in one action list." I've been trying to incorporate one of R.Penners equations into a prototype. it works, but appearantly not 100% scratch scratch
Here's the code. 'tester' is an MC instance
Math.easeInOutExpo = function (t, b, c, d) { if (t==0) return b; if (t==d) return b+c;
I have a need to build many Algebra and Geometry equations in Flash. I am looking for some kind of flash plugin that will typeset these equations so that I don't have to build them by hand. For instance, if I had a fraction 1/2 or 134/489 and I was stacking the numerator over the denominator, the fraction line would adjust to the length of the longest number.
I know that the InMath plugin works like this for InDesign, but the formatting breaks in the few file types that are able to be imported into Flash. Is anyone aware of such a plugin made specifically for flash?
Wondering if anyone can tell me whether it is possible to take an excel spreadsheet with its equations and all and place it into a Flash file so that it can work within the flash presentation.
Or would the only way to do this be to code the whole thing into flash from the start?
create a random subtraction equation where the result will always be positive? For example, my current scripting will return something lilke 3-6=-3. I don't want equations like this- only postive answers
//random numbers//1.function randomNumbers(min:Number,max:Number) var Results:Number=Math.floor(Math.random()*max)+min; return Results;} //2.new_mc.addEventListener(MouseEvent.CLICK, showRandomnumber);
I have five simple equations that I need help converting to ActionScript. I'm making a small "calculator" that takes input from the user and displays a number representing the result of the equation. They're two sets of equations: 1) three-scenario fee calculator to compare the annual costs (X) of renting versus buying equipment; 2) comparison of two rental plans. The numbers entered need to stay the same - the alphabets represent what the user will input. The equations are as follows: Scenario 1:
X = ([A � F] / G) + H + I + J + (K x 12) + ([L / N] x M) Scenario 2: X = ([B � F] / G) + ([E x C] / G) + H + I + J + (K x 12) + ([L / N] x M)[code]....
I've looked at my resources at hand, but my brain just shuts down when I see numbers and letters representing numbers. I do speak three languages fluently, so I (think) I make up for it.how to properly assign the correct order of events (brackets first, etc) in ActionScript to reflect the equations above.
I've been experimenting with this and I haven't been able to come up with an adequate solution. Hoping one of you Mathletes can point me in the right direction. I'm building a Snow Globe in ActionScript 3 and I need to come up with a set of equations to control two level of snowflakes - one level random, and the other interactive where a user can click on them.For the random snow, I need to have it create certain number of random x/y positions at the bottom of the globe, which is a circle with a radius of around 300. Then when the shake action occurs, They should randomly float toward the top, then fall back to a random position at the bottom of the circle again.
For the interactive snow, I need it to randomly layout, but I don't want flakes to overlap so that its easier to interact with them.
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)?
I have a billiard ball system, whic detects collisions between balls and modifies their x and y velocities accordingly.I have included a friction variable and I have a very basic system for applying the force of friction for each iteration of movement:
private static var FRICTION:Number = 0.94; public function move() : Void[code]....
This works to a reasonable level of satisfaction, but it doesn't quite feel right. The balls seem to take just a little too long to stop when they've slowed down to a very small velocity. I've tried tweaking the friction constasnt, but I still can't get sometthing that feels exactly right.
not really that handy with scripting, was wondering if someone knows how to add some easing to this. Right now i gave an mc that rolls out and back, but i would like there to be a bit of ease in ease out on it if possible.on the mc that you rollover is this
I'm having trouble with the new keyframing model in Flash CS4.Say I have a symbol that starts here, then moves over there, then waits, then moves back over there again, etc. etc.Using the new model, all of these movements seem to be considered the same and single tween.If I apply easing, the easing affects the entire range of keyframes. This doesn't make sense? I may want the symbol to slow down when it gets "there" and have different easing for different movements. Does this make sense?
In this documentation it says that flash CS5 should support custom easing, just like old good CS3 and earlier versions of flash.however, this feature seems to be missing from CS5. it says:Click the Edit button next to the Ease slider in the frame Property inspector.but there is no "edit button" in the panel with easing slider.
I've created a page that contains 3 different movie clips that scroll left and right in respose to the mouse. They each move at different rates and create a parallax effect. My question is how do I ease the movie clips in and out of their stop positions? At the moment they all run full speed in and out of a stop.[code]
