-
Bobbing in Water REDUX
I am using the expression for undulation found at Dan Ebberts’ site
on position the following.
xAmp = 3; //height of undulations (pixels)
xFreq = .3; //undulations per second
xSpeed = 150; //speed of wave (pixels per second)wl = xSpeed/xFreq; //wavelength (pixels)
phaseOffset = ((position[0]%wl)/wl)*2*Math.PI;
y = xAmp*Math.sin(2*Math.PI*xFreq*time + phaseOffset);
value + [0,y]on rotation the following.
xFreq = .3; //undulations per second
xSpeed = 150; //speed of wave (pixels per second)
damping = 15; //undulation damping factorwl = xSpeed/xFreq; //wavelength (pixels)
phaseOffset = ((position[0]%wl)/wl)*2*Math.PI;
theta = Math.atan(Math.cos(2*Math.PI*xFreq*time + phaseOffset));
radiansToDegrees(theta)/damping;What I need is for the object to sway left and right 50 pixels or so.
I have tried applying a one position only wiggle to a null and parenting my object to that but the motion doesn’t seem natural as the two expressions sometimes conflict and cancel out each others motion. Is there any way to incorporate the left/right movement I need into this existing expression that works almost perfectly for my needs.Any help is much appreciated.
-
4 Replies
-
you could try adding an the same y expression as the x component for position…
just change the last line to:
value + [y,y]
if needed you could add a multiplier to the x component, something like this:
value + [4*y,y]
or you might try just offsetting the anchor point, moving it down… this will change how the rotation expression effect the rotation of the layer, and create side to side movement. that actually might be the easiest and most natural way to do what you are looking for…
Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW -
This works! Thank You.
-
Hey! I modified what you had just a little to get an X parameter. You’ll see the //–NEW section in the code.
Trent
xAmp = 3; //height of undulations (pixels)
xFreq = .3; //undulations per second
xSpeed = 150; //speed of wave (pixels per second)wl = xSpeed/xFreq; //wavelength (pixels)
phaseOffset = ((position[0]%wl)/wl)*2*Math.PI;
y = xAmp*Math.sin(2*Math.PI*xFreq*time + phaseOffset);//–NEW
swayAmp = 100; //amplitude of sway
swayFreq = .25; //frequency of sway
x = swayAmp * Math.sin(time * swayFreq);//—–
value + [x,y]Trent Armstrong – Creative Cow Leader
https://www.dallasaeug.com -
That works very very well, thank you!
Reply to this Discussion! Login or Sign Up