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swinging motion… how to i set the start value that isn’t Zero
I posted the expression i was using below… here is where i got the code from
i have a couple of issues with this code.
1. i need to have the start value of the swing adjustable. but i need it to come to a stop at zero.
2. i don’t understand why he didn’t use a Decay function…
swingMaxDistance = 75;
swingSpeed = 5;
easeTimeSpan = 3;
easeSpeed = 1;
easeVal = ease(time*easeSpeed, 0, easeTimeSpan, swingMaxDistance, 0);
Math.sin(time*swingSpeed) * easeVal; -
4 Replies
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When you look at this expression the graph editor, you’ll see a decaying sine wave. If you want it to start at maximum value, just change Math.sin() to Math.cos(). If you’re after something else, please describe what the curve should look like.
Dan
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ok one last issue… how do i delay time… aka offset the start time of the swinging.
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That depends on what you want to happen before the start time. This is one possibility:
tStart = 1;
swingMaxDistance = 75;
if (time < tStart)
swingMaxDistance;
else{
t = time - tStart;
swingSpeed = 5;
easeTimeSpan = 3
easeSpeed = 1;
easeVal = ease(t*easeSpeed, 0, easeTimeSpan, swingMaxDistance, 0);
Math.cos(t*swingSpeed) * easeVal;
}
Dan
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that works. aways struggle with Else if statements. thanks again dan.
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