Expressions and Tips - Revision history

Bernie: /* Somewhat automatic Contact Sheet */

2026-04-13T10:14:55Z

Somewhat automatic Contact Sheet

@@ Line 1: / Line 1: @@
 [[azerty AFX]] keyboard shortcuts
 === Somewhat automatic Contact Sheet ===
 WIP. It will autolayout footage/comps and corresponding text layers (you'll still need to ctrl c ctrl v position+scale expressions).

2026-03-30T15:08:27Z

Afx Path Coordinates

2026-03-30T15:04:32Z

Position from mask path

@@ Line 23: / Line 23: @@
 https://i.imgur.com/iD9BZ24.jpeg
 === Position from mask path ===
 image tbd

2025-09-30T14:41:52Z

Rand characters

← Older revision		Revision as of 16:41, 30 September 2025
Line 138:		Line 138:

	===Rand characters===		===Rand characters===

			https://i.imgur.com/7hll8l1.png

	<pre>		<pre>
			//seedRandom(1,true); //remove line to have it randomize each frame
	chars = "GATC";		chars = "GATC";

			characters = 6;
			blocks = 4;
			lines = 10;

	textValue = "";		textValue = "";
	for(i=0;i<~~100~~;i++){		for(i=0;i<lines;i++){
	randVar = random() * chars.length;		for(j=0;j<blocks;j++){
	characterVar = chars.charAt(randVar);		for(k=0;k<characters;k++){
	textValue = textValue + characterVar;		randVar = random() * chars.length;
			characterVar = chars.charAt(randVar);
			textValue = textValue + characterVar;
			}
			textValue += " ";
			}
			textValue += "\n";
	}		}
	textValue;		textValue;

2025-02-27T09:55:25Z

Converting RGB to CMYK in After Effects

@@ Line 1: / Line 1: @@
 [[azerty AFX]] keyboard shortcuts
 === Converting RGB to CMYK in After Effects ===
 Is a real pain in the buttocks. I know I'm not following any nifty color conversion algorithm but I just needed a way to use substractive colors on a project (fake print with halftone pattern). This was such a pain in the buttock that I'll probably code a better plugin if I ever get the chance to.
@@ Line 5: / Line 19: @@
 https://i.imgur.com/eL2vlqv.gif
-The way I went from RGB to C,M,Y (and not K, might have to fiddle with this ! I'll reupload if I can find a better solution) is using channel mixers and a bunch of other things.
+The way I went from RGB to C,M,Y. The settings are not all necessary (and also no K, I still need to fiddle with this to find the exact RGB match! I'll reupload if I find a better solution).
 https://i.imgur.com/iD9BZ24.jpeg

2025-02-25T16:45:01Z

Position from mask path

← Older revision		Revision as of 18:45, 25 February 2025
Line 1:		Line 1:
	[[azerty AFX]] keyboard shortcuts		[[azerty AFX]] keyboard shortcuts
			=== Converting RGB to CMYK in After Effects ===
			Is a real pain in the buttocks. I know I'm not following any nifty color conversion algorithm but I just needed a way to use substractive colors on a project (fake print with halftone pattern). This was such a pain in the buttock that I'll probably code a better plugin if I ever get the chance to.

			https://i.imgur.com/eL2vlqv.gif

			The way I went from RGB to C,M,Y (and not K, might have to fiddle with this ! I'll reupload if I can find a better solution) is using channel mixers and a bunch of other things.

			https://i.imgur.com/iD9BZ24.jpeg

	=== Position from mask path ===		=== Position from mask path ===
	image tbd		image tbd
Line 9:		Line 18:
	mask(1).maskPath.pointOnPath(t)		mask(1).maskPath.pointOnPath(t)
	</pre>		</pre>


	=== Loop animation before and after first and last keyframes===		=== Loop animation before and after first and last keyframes===

2025-02-18T11:14:50Z

Retime (varispeed) any value

← Older revision		Revision as of 13:14, 18 February 2025
Line 78:		Line 78:
	===Retime (varispeed) any value ===		===Retime (varispeed) any value ===

	Allows time remapping of animation without having to time remap (and precomp) using valueAtTime and a slider		Allows time remapping of animation without having to time remap (and precomp). This way you can link different animations. It's using valueAtTime and a slider. You'll have to edit it for n-dimensional values (like position).

	<html>		<html>
Line 90:		Line 90:

	<pre>		<pre>
	~~speed~~ = effect("speed")("Slider"); //slider varies between 0 and 1, allows precise slow ups and downs in a single slider		spd = effect("speed")("Slider"); //slider varies between 0 and 1, allows precise slow ups and downs in a single slider
	p = thisProperty;		p = thisProperty;
	firstT = p.key(1).time;		firstT = p.key(1).time;
	lastT = p.key(p.numKeys).time;		lastT = p.key(p.numKeys).time;
	p = p.valueAtTime(~~speed~~*(lastT-firstT)+firstT)		p = p.valueAtTime(spd*(lastT-firstT)+firstT);
			//might have to add [p[0],p[1]];
	</pre>		</pre>

2024-10-08T16:36:11Z

Loop animation before and after first and last keyframes

← Older revision		Revision as of 18:36, 8 October 2024
Line 1:		Line 1:
	[[azerty AFX]] keyboard shortcuts		[[azerty AFX]] keyboard shortcuts
			=== Position from mask path ===
			image tbd

			Takes the first and second frame of an effect to drive a position along a path. You can use this to drive the 'write-on' effect if you don't have 3d stroke.
			<pre>
			t = (time-key(1).time)/(key(2).time-key(1).time);
			t = linear(t,0,1,0,1);
			mask(1).maskPath.pointOnPath(t)
			</pre>


	=== Loop animation before and after first and last keyframes===		=== Loop animation before and after first and last keyframes===

2024-01-16T14:58:26Z

Display current layer name

@@ Line 1: / Line 1: @@
 [[azerty AFX]] keyboard shortcuts
 === Display current layer name ===
 screenshot tbd this is pretty specific

2023-12-12T14:55:19Z

Retime (varispeed) any value

← Older revision		Revision as of 16:55, 12 December 2023
Line 53:		Line 53:

	===Retime (varispeed) any value ===		===Retime (varispeed) any value ===

	Allows time remapping of animation without having to time remap (and precomp) using valueAtTime and a slider		Allows time remapping of animation without having to time remap (and precomp) using valueAtTime and a slider

	~~screenshot tbd~~		<html>
			<video width="640" controls>
			<source src="https://i.imgur.com/KQhIIJi.mp4" type="video/mp4" >
			Your browser does not support the video tag.
			</video>
			</html>

			Add a slider control that you call 'speed', and then add this expression to remap it according to the animation as seen in the video above

	<pre>		<pre>
	speed = effect("speed")("Slider"); //slider varies between 0 and 1, allows precise slow ups and downs in a single slider		speed = effect("speed")("Slider"); //slider varies between 0 and 1, allows precise slow ups and downs in a single slider
	p = ~~transform.position~~; ~~//or any other~~		p = thisProperty;
	firstT = p.key(1).time;		firstT = p.key(1).time;
	lastT = p.key(p.numKeys).time;		lastT = p.key(p.numKeys).time;