AfRo

I'm working on a project in which I use a particle system (shiva and vishnu) to let 3D models move over my screen in 3D. I want to apply slab to these models. As suggested in this forum and recipe 21 I can render to a texture and process the texture with slabs. This works, but now I've got a videoplane which ruines my visuals. Because I've got a video running in the background. Is there another way to show the 3D models after I've processed them with slab. Can't I just render 'm and use a "slab texture" on them?

slab-on-a-jit-gl-model

are you rendering to a videoplane that has blend_enable enabled, so 

that you can see through the alpha values of your rendered to movie?

On Apr 15, 2008, at 8:14 AM, Rutger wrote:

> I'm working on a project in which I use a particle system (shiva and 

> vishnu) to let 3D models move over my screen in 3D. I want to apply 

> slab to these models. As suggested in this forum and recipe 21 I can 

> render to a texture and process the texture with slabs. This works, 

> but now I've got a videoplane which ruines my visuals. Because I've 

> got a video running in the background. Is there another way to show 

> the 3D models after I've processed them with slab. Can't I just 

> render 'm and use a "slab texture" on them?

> I can't get it working. Any suggestions?

are you rendering to a videoplane that has blend_enable enabled, so  
that you can see through the alpha values of your rendered to movie?

>
> Hi,
>
> I'm working on a project in which I use a particle system (shiva and  
> vishnu) to let 3D models move over my screen in 3D. I want to apply  
> slab to these models. As suggested in this forum and recipe 21 I can  
> render to a texture and process the texture with slabs. This works,  
> but now I've got a videoplane which ruines my visuals. Because I've  
> got a video running in the background. Is there another way to show  
> the 3D models after I've processed them with slab. Can't I just  
> render 'm and use a "slab texture" on them?
>
> I can't get it working. Any suggestions?
>
> THANKS


Because there are so many ways to accomplish what you are describing, it 

will be really hard to give any useful advice without seeing a simple 

patch that demonstrates what you are seeing.

Because there are so many ways to accomplish what you are describing, it 
will be really hard to give any useful advice without seeing a simple 
patch that demonstrates what you are seeing.

OK here I've got the simple besis of what I'm doing. The problems in this patch are:

1. I don't want to see a videoplane in front of my video

2. I want to be able to rotate the 3D objects, not the videoplane

3. When I increase the number of particles only one is shown. I want to see them all. (this works when I don't render to a texture and apply slab on that)

I would be very grateful if you guys can help me with this problem

1. I don't want to see a videoplane in front of my video
2. I want to be able to rotate the 3D objects, not the videoplane
3. When I increase the number of particles only one is shown. I want to see them all. (this works when I don't render to a texture and apply slab on that)

Hey, I've got an additional remark about the patch. You have to save it and then reload it so that the loadbang will set the matrix dimension right.

If I had a nickel for every time someone got snarled up working with 

Anyways, I think you'd be well served to look at jit.gl.multiple for 

doing the particle drawing stuff, or using "to_texture" instead of 

@capture to do your rendering to texture. I don't think capture will do 

what you want it to with the jit.iter method of particle rendering. 

Attached you'll find a version of your particle drawing -> capture stuff 

that works. I removed all the other stuff for the sake of legibility...

Ugh. 
If I had a nickel for every time someone got snarled up working with 
that particle/model example...

Anyways, I think you'd be well served to look at jit.gl.multiple for 
doing the particle drawing stuff, or using "to_texture" instead of 
@capture to do your rendering to texture.  I don't think capture will do 
what you want it to with the jit.iter method of particle rendering.  
Attached you'll find a version of your particle drawing -> capture stuff 
that works.  I removed all the other stuff for the sake of legibility...

Wow, it works lke crazy. I'm very willing to give you a nickel for using this haha. I've still got 2 questions about it.

1 I'm unable to show a movie behind the 3d models. Is this still possible?

2 How can I learn more about jitter (especially about the 3D part). The solutions you're coming up with are great, but I would love to learn more about it myself. The jit.gl.multiple i.e. is just great for my patch, but I wouldn't be able to implement it myself. and I'm sure I wouldn't be able to use it to its full potential. (I read somewhere on the forum that it's possible to apply a different texture to each instance of multiple i.e. , which is great)

Slab on a jit.gl.model