This filter shows locus of particles. The structure of locus would be constructed when the rendering of each frame is done.
Note that if some frames are skipped, locus of that frame would not be rendered.
Sample of locus.
Note that one step is skipped and not rendered, and locus of that frame is not constructed and not drawn.
Note that locus filter consumes much memory, since it must have data of EVERY steps, especially to draw locus over long duration.
Take care on memory consumption.
String Input and Region
You can select particles that show locus.
Directly select particle index or ID.
Enumerate particles separeted with camma, or hyphenate minimum and maximum index like a-b. This expression include b.
The format for hyphenation is like following.
minimum - increment - maximum
increment can be omitted. Enumeration and hyphenation can be combined as follows.
Particles within some region woule be seleceted.
The selection is done in base index frame. Thus, if particles move far away from the region, the locus would be drifted away similarly.
During selectiong proccess, you can execute expression that returns true or flase for each parcticles.
For example, you can select particles with value1 larger than some critical value.
Note) Expression is done for particles within the selected range.
Thus, unselecetd particles cannot be turnd to be selected by expression process.
Select all particles at first, and then turn invalid particles to be unselected by returning flase value in expression.
If some particles moves out from periodic boundary, that particles comes in from opposite boundary. Simple connection of such particles would be devastating.
When this option is checked, particles that moves over half size of the boundary box would be ignored.
Not to consume large memory space, locus structure outside the drawing region would be released automatically.
This option determines whether locus would be copied by Copybox Filter.
This option determines whether locus would be effected by Databox Filter.
Select alpha blend or additive blend.
Note that order of drawing of locus is not Z-sorted. Just draw them in order of particle index.
Thus, semi-transparent locus with alpha blend rendering is incorrect.
In that case, use additive blend (this blend method is not affected by Z-order) or use dither rendering and Stochastic Tranparency.
Length (or duration) of each lines in unit of timestep.
You can draw locus not only single color but color curve.
Other options about line rendering is in Texture Setting.