I am completely new to AE expressions.
Suppose that I have bunch of layer markers on a text layer, and the text is linked to a slider control:
Now, what I want is that whenever the playhead (or the current frame) lands on the next marker(s), I want the slider to increment by 1, like this:
I want an expression which I can add to the Slider to achieve the desired result. Your help would be greatly appreciated. Thank you.
I posted this question on Reddit as well, they told me to use ChatGPT. I tried using it, but it doesn't achieve the desired result after trying several different prompts and even when breaking down the problem into parts.
I finally figured it out, I got rid of the slider, added a "Numbers" effect to the text layer (which displays the counter), and added the following expression code to the "Value/..." property:
for (i = 1; i <= thisLayer.marker.numKeys; i++) {
if (thisLayer.marker.key(i).time <= time) {
value = value + 1;
}
else {
value;
}
}
Related
I have a chart with a legend whose symbol I replaced per the example in the docs. It looks like this:
var marker = chart.legend.markers.template;
marker.disposeChildren();
let dollar = marker.createChild(am4core.Image);
dollar.width = 40;
dollar.height = 40;
dollar.verticalCenter = "top";
dollar.horizontalCenter = "left";
dollar.strokeWidth = 2;
dollar.strokeOpacity = 1;
dollar.adapter.add("href", function (href: any, target: any) {
return `http://host.com?id=${target.dataItem.dataContext.dummyData.value`;
});
And this works, my images are displayed, little faces :) - I would like to add a border around the image of the same color of the series so that you can identify the marker in the legend with the series. But I can't find the right set of settings to make this a thing.
Is this possible?
EDIT -
So, I tried the following chage to the above and got a decent result. It's a bit hacky, so there might be a better way. If not, I guess this works.
//marker.disposeChildren(); <= don't do this
marker.width = "50px";
marker.height = "50px";
Basically the original marker remains and is behind the image. The marker has to be made larger so that it sticks out and creates a pseudo border.
I'm going to answer this one myself, since I have a working solution and no one lese answered :)
The edit above does what it is needed. Doesn't see like a great solution, a border around an image should be doable. But this gets us what we want.
Solution:
Make the marker bigger than the image
Place the image above the marker
In this case, we do not remove child elements of the marker, like the sample code on amchart4 shows, since you need it.
I have been trying to make my character shoot a projectile on a particular frame of animation. However, sometimes it works and other times it just ignores creating the projectile.
I've tried using alarms instead of checking for the image index but I can't get the timer low enough to get the perfect timing.
I think it may be a problem with the image speed being 0.2 instead of 1.
I'm using a state machine to make it switch between moving and shooting, but I checked and it isn't a problem with state switching over as it changes when I want it to.
Here is relevant code from the shooting state:
if image_index == 2 {
instance_create(x+20*image_xscale,y,obj_projectile);
}
Here is the code that changes the tank over to the shooting state from the main state:
if key_shoot{
state = states.shoot;
image_speed = 0.2;
sprite_index = spr_tankShoot;
}
There is also an animation end event in the object with the following code:
if sprite_index == spr_tankShoot{
state = states.normal;
}
If anyone can see something wrong with the code and/or know what might be going wrong with this, it'd be much appreciated.
I think it may be a problem with the image speed being 0.2 instead of 1.
This is possible - if your animations have different speeds and you don't tend to reset image_index on animation start, you may end up with varying starting indexes (suppose, 0.1) that would not fall right on 2.0 when adding 0.2 to them. Checking that a frame is precisely a number is a not-as-good practice in general though.
You could store image_index at the end of the frame for future reference,
image_index_previous = image_index;
and then check that image_index stepped over 2 since the last frame:
if image_index_previous < 2 && image_index >= 2 {
instance_create(x+20*image_xscale,y,obj_projectile);
}
I am trying to write an app that has a multiple choice quiz in it. I am writing it in a simple and somewhat hardcoded way. I have created an array of questions and a 2-d array of answers as my "database". My problem is that when i am iterating over the loop, my app immediately goes to the last question, even though if statements that in an ideal world should let the user interact with every questions.
my while loop is
var i = 0;
while i<10 then
make the question view
make the answer view
make the answers clickable
calculate scoring
if the next button is pushed and i < 8 then i+=1
/*this prevents the app from building but when i put the i+=1 outside this control statement it goes directly to the last question in my database*/
end While
any ideas? my code is really long and do not know if i should post it
Rather than doing it all in a while loop, you should take a slightly different approach.
Create a function that does the while-loop-block above, and use a variable to keep track of the currently displayed question and answer. Then when the user clicks next, advance to the next pair, until the user is done.
var current = 0, until = 10;
function showCurrent() {
// make the question view
// make the answer view
// make the answers clickable
// calculate scoring
}
function goToNext() {
current += 1;
if (current === until) {
// carry on with whatever is next
}
else {
showCurrent();
}
}
showCurrent();
So I'm trying to program a game using flash, and it's my very first time and I can't get something to work.
In the game, a ball will float across the screen and if you click on it you get 2 points. Except when I test it, the first time I click on the ball I get the letters 'eoceeeo' and if I click the ball again I get the letters 'eeoS'. The dynamic text is on a layer with the first frame having the AS of
var _root.score = 0;
gameScore.text = _root.score;
The dynamic text has a varible of _root.score and a name of gameScore
The floating ball has the AS of
on(release) { _root.score+=2; _root.gameScore.text = _root.score; }
If you click on your gameScore dynamic text field, you can scroll down to its Variable property and set that as _root.score. That way, you do not have to call gameScore.text = _root.score every time the score changes - it will simply update automatically.
Also, if you remove the var from in front of _root.score = 0, it will be easier for ActionScript to handle. Perhaps, you are casting the score variable as an integer, and the dynamic text field is having trouble displaying it as a string of characters. This can also be solved with String(_root.score) and score.toString().
That should make your code a bit less complex, and help for you to identity your random letters problem, which can't be solved specifically with the information you have here. Hope that helps!
I am in a late phase of finishing my first usable iOS app.
I am creating a simple Pong game i am using a simple collision detection using CGRectIntersectsRect, but i came up with a problem.
if(CGRectIntersectsRect(mic.frame,plosina_a.frame)) {
if(mic.center.y < (plosina_a.center.y + plosina_a.frame.size.height)) {
RychlostMice.y = -RychlostMice.y;
}
}
if(CGRectIntersectsRect(mic.frame,plosina_b.frame)) {
if(mic.center.y < (plosina_b.center.y + plosina_b.frame.size.height)) {
RychlostMice.y = -RychlostMice.y;
}
}
When i use it like this the ball (mic) sort of gets to the paddles (plosina) and starts moving the other way sort of in the middle of the paddle.
My programming teacher managed to fix this problem for one of the paddles (the _b one) by adding the .frame.size.height instead of just .frame which i have used before, but when i did the same thing for the other paddle it didn't work i don't know what's up with that.
Also it creates another problem sometimes there is a situation where the ball get's caught up in the paddle - so I'm looking for a definition of the whole object and not just one side probably?
i hope you can help.
I can see three potential problems here.
The first is that you are waiting until the ball overlaps the paddle before counting it as a touch. It sounds like you really want to start the ball moving in the other direction when the ball touches the paddle, not when it intersects it. The CGRectIntersectsRect waits until they overlap before returning true. If you make either rectangle one pixel larger with a call to CGRectInset, your test will return true as soon as the ball reaches that paddle--by that time, there will be one pixel overlapping the expand rectangle. The test would look like this:
if(CGRectIntersectsRect(CGRectInset(mic.frame, -1, -1),plosina_a.frame)) {
if(mic.center.y < (plosina_a.center.y + plosina_a.frame.size.height)) {
RychlostMice.y = -RychlostMice.y;
}
}
if(CGRectIntersectsRect(CGRectInset(mic.frame, -1, -1),plosina_b.frame)) {
if(mic.center.y < (plosina_b.center.y + plosina_b.frame.size.height)) {
RychlostMice.y = -RychlostMice.y;
}
}
The second potential problem has to do with the velocity of the ball. Without seeing all of the code, I don't know if this is a problem or not. If the ball can move more than one pixel at a time, it could easily overlap--or even pass through--the paddle without a hit detection. There are lots of logic changes you can add to take care of this, but the easiest solution may be to just make sure the ball doesn't move more than one pixel at a time.
Finally, if you want to use the hack for both paddles, reverse the sign of the comparison on the other side of the game.
I'm guessing that your pong is played vertically, so that one paddle is at the top of the screen and the other is at the bottom?
If you you need to mirror the logic vertically for the other paddle. Right now you are using the same logic for the top and bottom paddles, but for the bottom paddle you probably need something like the following instead
if(CGRectIntersectsRect(mic.frame,plosina_b.frame)) {
if(mic.center.y > (plosina_b.center.y - plosina_b.frame.size.height)) {
RychlostMice.y = -RychlostMice.y;
}
}
Notice how I'm using the > sign and subtracting the height instead of adding it.