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Checkbox + Interpolation Problem
Hey all,
I am struggling getting the following to work
Aim:
- Have 2 null objects which the camera can potentially autofocus on,
- Use a checkbox to switch between the 2 values,
- Have a 5 second transition between the 2 values.
Problem:
- The interpolation starts from ‘frame 0’ instead of from where the checkbox keyframe is.
Code:
target1 = thisComp.layer(“Focus”);
v1 = target1.toWorld(target1.anchorPoint) – toWorld([0,0,0]);
v2 = toWorldVec([0,0,1]);
v3 = dot(v1,v2);target2 = thisComp.layer(“ForceFocus”);
b1 = target2.toWorld(target2.anchorPoint) – toWorld([0,0,0]);
b2 = toWorldVec([0,0,1]);
b3 = dot(b1,b2);if (thisComp.layer(“Focus”).effect(“FocusNull”)(“Checkbox”)==true) {
ease(time, 0, 5, b3, v3);
} else {
ease(time, 0, 5, v3, b3);
}If anyone can help out with this it wold be much appreciated.
I am on a fairly tight timeline with this one and could really benefit from somebody’s knowledge.Kinds regards
Nathan
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4 Replies
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It’s hard to see exactly what you’re doing, but I think you need to involve the times of your keyframes. Part of your code would be structured like this:
t = thisComp.layer(“Focus”).effect(“FocusNull”)(“Checkbox”).key(1).time;
if (time < t){ b3 }else{ linear(time,t,t+5,b3,v3) } Dan }
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Hey Dan,
Thanks for your fast response!
After having the night to think about it I have come to realize I could simplify my needs and even improve the function of my expression..All I need is a slider that will control the interpolation between my 2 values (v3 and B3)
So for example if the Slider is at zero, my value will be v3 and if slider is 100 my value will be b3.
Is this possible?
Again, Thank You very much for you attention!
Kind Regards,
Nathan
(PS.
Please let me know if you would like me to elaborate on the context of this expression in relation to my project.) -
Hey Dan
Okay Wow,
Its so simple
I worked it out!!
when the interpolation methods finally made sense it was an amazing moment!
I was having difficulty understanding the relationship between the inputs but then suddenly it all clicked!
wow, what a powerful function!I am on the right track now
Thanks for you help and time!
Best wishes
Nathan Clark
(PS.
is it normal to get so excited about a line of code. I am smiling so hard my cheeks hurt… and over an expression… what a geek). -
Getting a piece of code to work is a pleasure that’s hard to explain to anyone that hasn’t done it. Welcome to the club. 🙂
Dan
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