From: "Daniel Velez" <AE-List@media-motion.tv>
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Message-ID: <CAF248kA2g=bKDUpnPwVc1Zmi7DNYzasJ+FQ4PCc-XuT5US8jUw@mail.gmail.com>
Subject: camera shake
To: After Effects Mail List <AE-List@media-motion.tv>
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I've found this expression for camera shake helpful (Dan Hibberts website)
but once i separate the camera positions dimensions it stop working, is any
way that this can be arrange so it works with separate positions keyframes?

Thanks

Dan


freq = effect("Frequency")("Slider"); amp = effect("Amplitude")("Slider"); if
(freq.numKeys > 0){ accum = 0; v0 = freq.valueAtTime(0); t0 = 0; i = 1;
while (i <= freq.numKeys){ t = freq.key(i).time; if (t < time){ accum +=
(v0 + freq.key(i).value)*(t - t0)/2; v0 = freq.key(i).value; t0 = t; if (i
== freq.numKeys){ accum += (time - t0)*v0; } }else{ accum += (freq +
v0)*(time - t0)/2; break; } i++; } }else{ accum = freq*time; }
wiggle(1,amp,1,.5,accum);

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<div dir=3D"ltr">I&#39;ve found this expression for camera shake helpful (D=
an Hibberts website) but once i separate the camera positions dimensions it=
 stop working, is any way that this can be arrange so it works with separat=
e positions keyframes?<div>

<br></div><div>Thanks<div><br></div><div>Dan</div><div><br></div><div><br><=
div><span style=3D"color:rgb(0,0,0);font-family:monospace;font-size:12px;li=
ne-height:20px;white-space:pre;background-color:rgb(245,245,245)">freq =3D =
effect(&quot;Frequency&quot;)(&quot;Slider&quot;);</span><span style=3D"col=
or:rgb(0,0,0);font-family:monospace;font-size:12px;line-height:20px;white-s=
pace:pre;background-color:rgb(245,245,245)">
amp =3D effect(&quot;Amplitude&quot;)(&quot;Slider&quot;);</span><span styl=
e=3D"color:rgb(0,0,0);font-family:monospace;font-size:12px;line-height:20px=
;white-space:pre;background-color:rgb(245,245,245)">
</span><span style=3D"color:rgb(0,0,0);font-family:monospace;font-size:12px=
;line-height:20px;white-space:pre;background-color:rgb(245,245,245)">
if (freq.numKeys &gt; 0){</span><span style=3D"color:rgb(0,0,0);font-family=
:monospace;font-size:12px;line-height:20px;white-space:pre;background-color=
:rgb(245,245,245)">
  accum =3D 0;</span><span style=3D"color:rgb(0,0,0);font-family:monospace;=
font-size:12px;line-height:20px;white-space:pre;background-color:rgb(245,24=
5,245)">
  v0 =3D freq.valueAtTime(0);</span><span style=3D"color:rgb(0,0,0);font-fa=
mily:monospace;font-size:12px;line-height:20px;white-space:pre;background-c=
olor:rgb(245,245,245)">
  t0 =3D 0;</span><span style=3D"color:rgb(0,0,0);font-family:monospace;fon=
t-size:12px;line-height:20px;white-space:pre;background-color:rgb(245,245,2=
45)">
  i =3D 1;</span><span style=3D"color:rgb(0,0,0);font-family:monospace;font=
-size:12px;line-height:20px;white-space:pre;background-color:rgb(245,245,24=
5)">
  while (i &lt;=3D freq.numKeys){</span><span style=3D"color:rgb(0,0,0);fon=
t-family:monospace;font-size:12px;line-height:20px;white-space:pre;backgrou=
nd-color:rgb(245,245,245)">
    t =3D freq.key(i).time;</span><span style=3D"color:rgb(0,0,0);font-fami=
ly:monospace;font-size:12px;line-height:20px;white-space:pre;background-col=
or:rgb(245,245,245)">
    if (t &lt; time){</span><span style=3D"color:rgb(0,0,0);font-family:mon=
ospace;font-size:12px;line-height:20px;white-space:pre;background-color:rgb=
(245,245,245)">
      accum +=3D (v0 + freq.key(i).value)*(t - t0)/2;</span><span style=3D"=
color:rgb(0,0,0);font-family:monospace;font-size:12px;line-height:20px;whit=
e-space:pre;background-color:rgb(245,245,245)">
      v0 =3D freq.key(i).value;</span><span style=3D"color:rgb(0,0,0);font-=
family:monospace;font-size:12px;line-height:20px;white-space:pre;background=
-color:rgb(245,245,245)">
      t0 =3D t;</span><span style=3D"color:rgb(0,0,0);font-family:monospace=
;font-size:12px;line-height:20px;white-space:pre;background-color:rgb(245,2=
45,245)">
      if (i =3D=3D freq.numKeys){</span><span style=3D"color:rgb(0,0,0);fon=
t-family:monospace;font-size:12px;line-height:20px;white-space:pre;backgrou=
nd-color:rgb(245,245,245)">
        accum +=3D (time - t0)*v0;</span><span style=3D"color:rgb(0,0,0);fo=
nt-family:monospace;font-size:12px;line-height:20px;white-space:pre;backgro=
und-color:rgb(245,245,245)">
      }</span><span style=3D"color:rgb(0,0,0);font-family:monospace;font-si=
ze:12px;line-height:20px;white-space:pre;background-color:rgb(245,245,245)"=
>
    }else{</span><span style=3D"color:rgb(0,0,0);font-family:monospace;font=
-size:12px;line-height:20px;white-space:pre;background-color:rgb(245,245,24=
5)">
      accum +=3D (freq + v0)*(time - t0)/2;</span><span style=3D"color:rgb(=
0,0,0);font-family:monospace;font-size:12px;line-height:20px;white-space:pr=
e;background-color:rgb(245,245,245)">
      break;</span><span style=3D"color:rgb(0,0,0);font-family:monospace;fo=
nt-size:12px;line-height:20px;white-space:pre;background-color:rgb(245,245,=
245)">
    }</span><span style=3D"color:rgb(0,0,0);font-family:monospace;font-size=
:12px;line-height:20px;white-space:pre;background-color:rgb(245,245,245)">
    i++;</span><span style=3D"color:rgb(0,0,0);font-family:monospace;font-s=
ize:12px;line-height:20px;white-space:pre;background-color:rgb(245,245,245)=
">
  }</span><span style=3D"color:rgb(0,0,0);font-family:monospace;font-size:1=
2px;line-height:20px;white-space:pre;background-color:rgb(245,245,245)">
}else{</span><span style=3D"color:rgb(0,0,0);font-family:monospace;font-siz=
e:12px;line-height:20px;white-space:pre;background-color:rgb(245,245,245)">
  accum =3D freq*time;</span><span style=3D"color:rgb(0,0,0);font-family:mo=
nospace;font-size:12px;line-height:20px;white-space:pre;background-color:rg=
b(245,245,245)">
}</span><span style=3D"color:rgb(0,0,0);font-family:monospace;font-size:12p=
x;line-height:20px;white-space:pre;background-color:rgb(245,245,245)">
wiggle(1,amp,1,.5,accum);</span><br></div></div></div></div>

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