Just wondering if it is possible to have a keyable hide/reveal, for animation purposes, instead of doing it by hand while rendering, which is bad because u cant save what u just did..
Example:
first frames of
Normally im doing this hide/reveal with materials but in this case i would need one material for each jenga block, which is a bit messy, and even more for complex scenes. Lets say a rail road with 10000 meshes :s. Or a stop motion of a city getting build up with bricks cement blocks metal and stuff:)
---
And second question is there a way to have a general slider for the transparency of an entire model with many mats and meshes under its hierarchy?
Re: Hide/Reveal
Posted: 28 Apr 2016, 21:30
by Mathaeus
You can animate visibility of object, or link it by expression to something like scale, let's say if scale is smaller than some value, visibility is zero. Or, to use ICE instances and just delete the particles. However this is Boolean, on - off, nothing in between. Same behavior as in Maya or Max, if I'm correct. Also it worth to checkout, how this works with particular renderer, especially in case of motion blur.
For small example, while ago in one early version of 3delight I had to move particles across one frame, away from camera, exactly along camera ray, behind matte plane, to avoid the motion trail to 'nowhere', when they were deleted. Not hard task for ICE, anyway.
Gradual transparency by object, this belongs to material in SI, Maya, Max and Houdini (if I'm correct....). Perhaps the most versatile method in SI is, again, ICE instance, where transparency is driven by ICE attribute.
Re: Hide/Reveal
Posted: 28 Apr 2016, 22:59
by mc_axe
Mathaeus wrote:You can animate visibility of object, or link it by expression to something like scale, let's say if scale is smaller than some value, visibility is zero. Or, to use ICE instances and just delete the particles. However this is Boolean, on - off, nothing in between. Same behavior as in Maya or Max, if I'm correct. Also it worth to checkout, how this works with particular renderer, especially in case of motion blur.
For small example, while ago in one early version of 3delight I had to move particles across one frame, away from camera, exactly along camera ray, behind matte plane, to avoid the motion trail to 'nowhere', when they were deleted. Not hard task for ICE, anyway.
Gradual transparency by object, this belongs to material in SI, Maya, Max and Houdini (if I'm correct....). Perhaps the most versatile method in SI is, again, ICE instance, where transparency is driven by ICE attribute.
Thanx Matheus lot of info in your post and many things to look on and improve, for start i never ever imagined that u can animate checkboxes , lol i find that one so funny
Expressions are also gr8 stuff, this one toggles off visibility of a cube for scale x <1
same can be done for rendering visibility and so on
great so far with boolean visibility i will take a look on gradual stuff now cheers.
Re: Hide/Reveal
Posted: 29 Apr 2016, 14:41
by NNois
On some jobs I was using a usefull technique (derived from what mathaeus expose you):
1. Group all your objects to be animated
2. Create an ice tree who simply pick up all your object in the group then instance them -> You've just got a complete clone of your scene in a single point cloud.
3. now you can use delete(hide) by volume/null or whatever technique to animate the visibility
Re: Hide/Reveal
Posted: 29 Apr 2016, 23:15
by mc_axe
NNois wrote:On some jobs I was using a usefull technique (derived from what mathaeus expose you):
1. Group all your objects to be animated
2. Create an ice tree who simply pick up all your object in the group then instance them -> You've just got a complete clone of your scene in a single point cloud.
3. now you can use delete(hide) by volume/null or whatever technique to animate the visibility
thx nnois i did some tests but im rly bad with ICE, the best i got so far was to hide all objects in my instanced model at once with volume kill. With group i get only one ID at a time, i use this set instance geo for start, then i plug it to an emmiter with zero speed and only 1 particle. I know that this is probably a terrible way to do this.
-
So lets say i have all meshes of jenga blocks in a group or in a model. How can i control their visibility with a sphere for example.
Thx for any answers
Re: Hide/Reveal
Posted: 13 May 2016, 13:54
by NNois
here's a screenshot i just showed anotheplace
that's an unsimulated tree of course
Re: Hide/Reveal
Posted: 13 May 2016, 18:27
by FXDude
Thanks for this neat method!
For others, there is also a thread about this on the XSIList, dealing with islands is already very fast, but Julian Johnson's original JJ_Islands original but simpler method was yet even faster, & Olivier Jeannel used it in making a set of nodes to do things like this ... :
