[Basilisk]

Mylenium – are you remembering my thread?
Here is the discussion
https://forums.creativecow.net/cgi-bin/new_read_post.cgi?forumid=2&postid=860894

and here is a mini tute with download
https://forums.creativecow.net/cgi-bin/new_read_post.cgi?forumid=2&postid=860989&pview=t#head

tribute to Dan Ebberts for his help in cracking it.

Hope it helps.
James
Basilisk.co.uk

[Basilisk]

Mylenium – are you remembering my thread?
Here is the discussion
https://forums.creativecow.net/cgi-bin/new_read_post.cgi?forumid=2&postid=860894

and here is a mini tute with download
https://forums.creativecow.net/cgi-bin/new_read_post.cgi?forumid=2&postid=860989&pview=t#head

tribute to Dan Ebberts for his help in cracking it.

Hope it helps.
James
Basilisk.co.uk

[Basilisk]

Another option is to use the layer on “normal” blend mode, duplicate the layer, use the upper layer as a track matte – play with levels to adjust transparency. You can duplicate again and use add or screen mode to boost the brightness up further.

[Basilisk]

If you have Color Finesse then it is worth exploring the “secondary” tab. This allows you to select a range of colours rather than a single colour – more powerful than the leave color filter. Color Finesse does take a bit of learning, but it is definitely worth it.

James
basilisk.co.uk

[Basilisk]

The other codec I know of is “none” (top of the list I think) – Animation codec does reduce your file size in a non lossy way, which can be quite a saving when you have flat colours, less so with video footage. Some of the proprietry codecs (Blackmagic etc) might support alpha, but I haven’t tried them.

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I have posted a file here
https://forums.creativecow.net/cgi-bin/new_read_post.cgi?forumid=2&postid=860989&pview=t#head
this uses a 3d rendered object rather than an object videoed on a turntable, but the concept is the same

[Basilisk]

I have posted a file here
https://forums.creativecow.net/cgi-bin/new_read_post.cgi?forumid=2&postid=860989&pview=t#head
this uses a 3d rendered object rather than an object videoed on a turntable, but the concept is the same

[Basilisk]

Dan

I was working my way towards the applying expression to text layer approach… I guess AE 7 will have a full console etc.

Thanks again for you help – I have got it working now. “atan2” flips to the negative at 180 so it needs a corrector in there – otherwise spot on. Saved me several hours!

revTime = 7.2; //time for 1 revolution of object (seconds)
v = position – thisComp.layer(“Camera 1”).toWorld([0,0,0]);
a = radiansToDegrees(Math.atan2(v[0], v[2]));
if(a < 0){ a = a+360 } linear(a,0,360,0,revTime) I might post a sample when I have got it working with real footage cheers James

[Basilisk]

Dan

I was working my way towards the applying expression to text layer approach… I guess AE 7 will have a full console etc.

Thanks again for you help – I have got it working now. “atan2” flips to the negative at 180 so it needs a corrector in there – otherwise spot on. Saved me several hours!

revTime = 7.2; //time for 1 revolution of object (seconds)
v = position – thisComp.layer(“Camera 1”).toWorld([0,0,0]);
a = radiansToDegrees(Math.atan2(v[0], v[2]));
if(a < 0){ a = a+360 } linear(a,0,360,0,revTime) I might post a sample when I have got it working with real footage cheers James

[Basilisk]

Many thanks for this Dan – I think it is looking good – I think I need to get my head round the trigonometry to sort out the bugs, but it is great to have pointers on correct usage on “toWorld” and “linear”. This is my first multiline expression, and although I am familiar with ActionScript in Flash, I am finding the Adobe documentation (by comparison) a bit poor and lacking in examples of usage. Maybe I am looking in the wrong place!
Is there anyway of tracing variables easily? I can see the final effect of an expression, but if there is something wrong in the middle it is quite difficult to find it.

thanks
James