How to precompose a layer with all the effects applied to it programmatically in an After Effects jsx script?
Let's say I have the composition and the layer I want to precompose:
var myComp = app.project.activeItem;
var layers = myComp.selectedLayers
You can use the precompose function of a composition and pass down the layer indices that need to be procomposed:
This example would precompose the first layer of an active comp:
{
function MyScript(thisObj) {
var myComp = app.project.activeItem
var layers = myComp.selectedLayers
var newComp = comp.layers.precompose(
[1],
'Precomp_Name',
true);
)
}
MyScript(this)
}
Related
I would like to perform a test in one of my ViewModels that contains a BehaviorRelay object called "nearByCity" that it is bind to BehaviorRelay called "isNearBy". That's how my view model looks like.
class SearchViewViewModel: NSObject {
//MARK:- Properties
//MARK: Constants
let disposeBag = DisposeBag()
//MARK: Vars
var nearByCity:BehaviorRelay<String?> = BehaviorRelay(value: nil)
var isNearBy = BehaviorRelay(value: true)
//MARK:- Constructor
init() {
super.init()
setupBinders()
}
}
//MARK:- Private methods
private extension SearchViewViewModel{
func setupBinders(){
nearByCity
.asObservable()
.distinctUntilChanged()
.map({$0 ?? ""})
.map({$0 == ""})
.bind(to: isNearBy)
.disposed(by: disposeBag)
}
}
The test that i want to perform is to actually verify that when the string is accepted, the bool value also changes according to the function setupBinders().
Any Idea?
Thank you
Here's one way to test:
class RxSandboxTests: XCTestCase {
func testBinders() {
let scheduler = TestScheduler(initialClock: 0)
let source = scheduler.createColdObservable([.next(5, "hello"), .completed(10)])
let sink = scheduler.createObserver(Bool.self)
let disposeBag = DisposeBag()
let viewModel = SearchViewViewModel(appLocationManager: StubManager())
source.bind(to: viewModel.nearByCity).disposed(by: disposeBag)
viewModel.isNearBy.bind(to: sink).disposed(by: disposeBag)
scheduler.start()
XCTAssertEqual(sink.events, [.next(0, true), .next(5, false)])
}
}
Some other points:
Don't make your subject properties var use let instead because you don't want anybody to be able to replace them with unbound versions.
The fact that you have to use the AppLocationManager in this code that has no need of it implies that the object is doing too much. There is nothing wrong with having multiple view models in a view controller that each handle different parts of the view.
Best would be to avoid using Subjects (Relays) at all in your view model code, if needed, they are better left in the imperative side of the code.
At minimum, break up your setupBinders function so that the parts are independently testable. Your above could have been written as a simple, easily tested, free function:
func isNearBy(city: Observable<String?>) -> Observable<Bool> {
return city
.distinctUntilChanged()
.map {$0 ?? ""}
.map {$0 == ""}
}
I am trying to create a line chart plugin that will draw reference letters under some points. To do so, the plugin uses a custom afterDatasetsDraw function to perform the drawing. However, I am unable to find a way to pass in the reference letters for the desired points. Below is an example of what I'm trying to achieve with the red circled letters.
Does anyone have an idea on how to pass in the reference letters for the corresponding points?
Thanks.
I would just define some configuration properties for your new plugin and use one of those properties to define where the point reference should be located and what the reference value should be.
Here is an example of what I mean. This would be in the chart's options property.
pointReferenceLetters: {
display: true,
fontColor: 'green',
references: [
{datasetIndex: 0, dataIndex: 1, reference: 'A'},
{datasetIndex: 1, dataIndex: 2, reference: 'B'},
]
}
The plugin would then use this data to draw the point references. Here is an example showing how a plugin would use this data. Note, I just did a quick implementation to show the concept, this plugin does not draw the reference circle like yours would.
Chart.plugins.register({
afterDraw: function(chartInstance) {
if (chartInstance.config.options.pointReferenceLetters || chartInstance.config.options.pointReferenceLetters.display) {
var references = chartInstance.config.options.pointReferenceLetters.references || [];
var helpers = Chart.helpers;
var ctx = chartInstance.chart.ctx;
var fontColor = helpers.getValueOrDefault(chartInstance.config.options.pointReferenceLetters.fontColor, chartInstance.config.options.defaultFontColor);
// render the value of the chart above the bar
ctx.font = Chart.helpers.fontString(Chart.defaults.global.defaultFontSize + 5, 'normal', Chart.defaults.global.defaultFontFamily);
ctx.textAlign = 'center';
ctx.textBaseline = 'bottom';
ctx.fillStyle = fontColor;
chartInstance.data.datasets.forEach(function (dataset, dsindex) {
for (var i = 0; i < dataset.data.length; i++) {
// note, many browsers don't support the array.find() function.
// if you use this then be sure to provide a pollyfill
var refPoint = references.find(function(e) {
return e.datasetIndex == dsindex && e.dataIndex === i
});
if (refPoint) {
var model = dataset._meta[Object.keys(dataset._meta)[0]].data[i]._model;
ctx.fillText(refPoint.reference, model.x, model.y + 30);
}
}
});
}
}
});
As you an see, the plugin uses the data provided in the pointReferenceLetters.references property to determine when a point reference should be drawn and then uses the values provided as the reference text.
Here is a codepen example that demonstrates all of this.
I'm willing to build an endless animation using famous (for example an endless rolling gear or a randomly shaken surface). Should I write a custom Transitionable with an infinite duration or there is something smarter to achieve this ?
I would recommend using Modifiers transformFrom method to define a position or rotation based on time. This allows you to set a transform that will be updated on every tick of the engine, but will be controlled via actual time.
Here is an example of that..
Hope it helps!
var Engine = require('famous/core/Engine');
var Surface = require('famous/core/Surface');
var Transform = require('famous/core/Transform');
var Modifier = require('famous/core/Modifier');
var context = Engine.createContext();
var surface = new Surface({
size:[200,200],
content: "Hello",
properties: {
lineHeight:"200px",
color:"white",
textAlign:"center",
backgroundColor:'green'
}
})
surface.mod = new Modifier({
origin: [0.5,0.5],
align:[0.5,0.5]
});
var startTime = (new Date).getTime();
surface.mod.transformFrom(function(){
var currentTime = (new Date).getTime();
var rotation = (currentTime - startTime) / 360.0;
return Transform.rotate(0,0,rotation);
});
context.add(surface.mod).add(surface);
The answer is to use Transitionables
First you use use Transitionable.set(destination, {duration: VALUE})
Each Engine 'prerender' (every frame), you use Transitionable.get() to update a Modifier Transform
At the end of the Transitionable, it will run a callback to update the new destination
this.transit = new Transitionable(0);
// ------- when i say twerk, you twerk ----->
var _createWheelMod = function() {
var _setWheelModRotation = function() {
Engine.on("prerender", function() {
this.wheelMod.setTransform(Transform.rotate(0, 0, this.transit.get()));
}.bind(this));
};
// ------------ charge lasers ------->
var _setDestination = function() {
this.transit.set(100 + this.transit.get(), {duration: 2e5},
_setDestination.bind(this)); // callback when the transition has finished
};
_setWheelModRotation.call(this);
_setDestination.call(this);
};
If I have a transform translate thats animating something vertically between say 0 -> 1000, over 5 seconds, is there a way if I have click events to change the horizontal position without interrupting the vertical animation?
p.setTransform(Transform.translate(20,1000,0),
{
duration: 5000,
curve: 'linear'
});
then on some random click, I want to start changing the x position over 100ms or so, and it might have multiple of these before the 5000 duration has finished
I can play with the origin and animate that independently, but I really need pixel control. So is there a way to animate just the x?
If I add a setTransform, it chains after the first one rather than concurrently.
Yes, you most certainly can achieve this. You will want to use a ModifierChain. ModifierChain allows you to chain your modifiers together and control the transforms independently. Check out this example..
Hope this helps!
var Engine = require('famous/core/Engine');
var Surface = require('famous/core/Surface');
var StateModifier = require('famous/modifiers/StateModifier');
var Transform = require('famous/core/Transform');
var ModifierChain = require('famous/modifiers/ModifierChain');
var Easing = require('famous/transitions/Easing');
var context = Engine.createContext();
var surface = new Surface({
size:[200,200],
properties: { backgroundColor:'green' }
});
surface.yState = new StateModifier();
surface.xState = new StateModifier();
var x = 0;
var y = context.getSize()[1] - 200;
surface.on('click',function(){
x += 100;
surface.xState.halt();
surface.xState.setTransform(Transform.translate(x,0,0),{duration:200});
});
surface.chain = new ModifierChain();
surface.chain.addModifier(surface.yState);
surface.chain.addModifier(surface.xState);
context.add(surface.chain).add(surface);
surface.yState.setTransform(Transform.translate(0,y,0), {duration:5000});
Is there a way to get the paper for an element by referencing the element?
I'm creating elements in a loop and with each element i'm creating a new Raphael(...). See sample below.
Basically I want to stop the animation on click, but paper is undefined and calling stop() on the element itself doesn't work either.
$.each(el,function(key,value)
{
var li = $("<li>",{id:"item"+key).appendTo("#myUl");
var ppr = new Raphael($("item"+key),get(0),48,48);
//... do stuff like animate ...
li.click(function()
{
console.log($(this).paper); //undefined
})
})
I was wondering about a closure like below to capture the paper, so when the anonymous func runs, it has the variable captured.
Note, I'm not sure this is the best method overall, something feels a bit clunky about creating a new paper each time, but just trying to address the specific issue.
Untested code, but if you can get it on a fiddle, I think it should be possible to sort.
$.each(el,function(key,value)
{
var li = $("<li>",{id:"item"+key).appendTo("#myUl");
var ppr = new Raphael($("item"+key),get(0),48,48);
(function() {
var myPaper = ppr;
li.click(function()
{
console.log(myPaper);
})
})();
})
You can also attach the paper to the element's "data" using https://api.jquery.com/data/
$.each(el,function(key,value)
{
var li = $("<li>",{id:"item"+key).appendTo("#myUl");
var ppr = new Raphael($("item"+key),get(0),48,48);
li.data("paper", ppr ); // SAVE
li.click(function()
{
console.log($(this).data("paper")); // LOAD
})
})