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Increase a value every time an event occurs
Hello!
I have an element called “Target” moving along the Y axis.
Along that same axis is a series of squares.
What I would like is, whenever the Target meets the height of one of those squares, the square spins 90° clockwise. When the Target moves away, the square should retain that value, and later, when they meet again, it will rotate 90° more, so the value keeps increasing through the sequence, as many times as their Y values match. Could anyone please help me there?
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9 Replies
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I forgot to mention:
—Target is randomly moving up and down, but with 100 pixels increments, not wiggling;
—all the squares are also 100 pixels high, and therefore, Target’s motion and the square-made scale match.
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Something like this maybe:
p = thisComp.layer("Target").position;
animateFrames = 15;
triggered = p.valueAtTime(0)[1] >= position[1];
fCur = timeToFrames(time);
f = 1;
fSave = 0;
n = 0;
while (f <= fCur){
if (triggered){
if (p.valueAtTime(framesToTime(f))[1] < position[1]){
triggered = false;
}
}else{
if (p.valueAtTime(framesToTime(f))[1] >= position[1]){
n++;
triggered = true;
fSave = f;
}
}
f++
}
r = 0;
if (n > 0){
r = (n-1)*90 + ease(fCur-fSave,0,animateFrames,0,90);
}
value + r -
Thanks a lot Dan! It’s working like a charm
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Hi Dan, hi all, and tanks again for your help!
Based on the expression you sent, I tried to go further, and extend it to a 9×9 grid go squares, with the element named “Target” wiggling all over it, so not one axis anymore.
As you can see with the attachment, it does work somehow, but most of the times the whole row gets triggered, and, weirdly, only a chuck of a horizontal or vertical row…
What I want to achieve now is, when approaching a square —let’s say when it is touching it (each saquer is 120×120 pixels, so once the target is nearing it by 60 pixels on X and Y), the square must spin 90} and retains that rotation value until they meet again and it can spin further.
Here is what I wrote (please don’t mind):
p = thisComp.layer("Target").position;
animateFrames = 15;
Hor = p.valueAtTime(0)[0] >= position[0];
Ver = p.valueAtTime(0)[1] >= position[1];
fCur = timeToFrames(time);
f = 1;
fSave = 0;
n = 0;
while (f <= fCur){
if (Ver){
if (p.valueAtTime(framesToTime(f))[1] < position[1] && p.valueAtTime(framesToTime(f))[0] < position[0]){
Hor = false;
Ver = false;
}
}else{
if (p.valueAtTime(framesToTime(f))[1] >= position[1] && p.valueAtTime(framesToTime(f))[0] >= position[0]){
n++;
Hor = true;
Ver = true;
fSave = f;
}
}
f++
}
r = 0;
if (n > 0){
r = (n-1)*90 + ease(fCur-fSave,0,animateFrames,0,90);
}
value + r -
p = thisComp.layer("Target").position;
animateFrames = 15;
Hor = p.valueAtTime(0)[0] >= position[0];
Ver = p.valueAtTime(0)[1] >= position[1];
fCur = timeToFrames(time);
f = 1;
fSave = 0;
n = 0;
while (f <= fCur){
if (Ver){
if (p.valueAtTime(framesToTime(f))[1] < position[1] && p.valueAtTime(framesToTime(f))[0] < position[0]){
Hor = false;
Ver = false;
}
}else{
if (p.valueAtTime(framesToTime(f))[1] >= position[1] && p.valueAtTime(framesToTime(f))[0] >= position[0]){
n++;
Hor = true;
Ver = true;
fSave = f;
}
}
f++
}
r = 0;
if (n > 0){
r = (n-1)*90 + ease(fCur-fSave,0,animateFrames,0,90);
}
value + r -
I think you’d have to double up on everything, like this maybe:
p = thisComp.layer("Target").position;
animateFrames = 15;
triggeredH = p.valueAtTime(0)[0] >= position[0];
triggeredV= p.valueAtTime(0)[1] >= position[1];
fCur = timeToFrames(time);
f = 1;
fSaveH = 0;
fSaveV = 0;
nH = 0;
nV = 0;
while (f <= fCur){
if (triggeredH){
if (p.valueAtTime(framesToTime(f))[0] < position[0]){
triggeredH = false;
}
}else{
if (p.valueAtTime(framesToTime(f))[0] >= position[0]){
nH++;
triggeredH = true;
fSaveH = f;
}
}
if (triggeredV){
if (p.valueAtTime(framesToTime(f))[1] < position[1]){
triggeredV = false;
}
}else{
if (p.valueAtTime(framesToTime(f))[1] >= position[1]){
nV++;
triggeredV = true;
fSaveV = f;
}
}
f++
}
rV = 0;
rH = 0;
if (nH > 0){
rH = (nH-1)*90 + ease(fCur-fSaveH,0,animateFrames,0,90);
}
if (nV > 0){
rV = (nV-1)*90 + ease(fCur-fSaveV,0,animateFrames,0,90);
}
value + rV + rH -
Thanks Dan!! Do you know why the whole row gets triggered instead of just one single square, as shown in the video attached?
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Probably because I didn’t read your previous question correctly. 🙂
Try this one:
p = thisComp.layer("Target").position;
animateFrames = 15;
lim = 60;
d = p.valueAtTime(0) - position;
triggered = Math.abs(d[0]) <= 60 && Math.abs(d[1]) <= 60;
fCur = timeToFrames(time);
f = 1;
fSave = 0;
n = 0;
while (f <= fCur){
d = p.valueAtTime(framesToTime(f)) - position;
if (triggered){
if (Math.abs(d[0]) > 60 || Math.abs(d[1]) > 60){
triggered = false;
}
}else{
if (Math.abs(d[0]) <= 60 && Math.abs(d[1]) <= 60){
n++;
triggered = true;
fSave = f;
}
}
f++
}
r = 0;
if (n > 0){
r = (n-1)*90 + ease(fCur-fSave,0,animateFrames,0,90);
}
value + r -
Splendid!!! Thanks a lot Dan, this works like magic!
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