Leap Interaction engine

[Daniel.griffiths]

Hello,

I am currently working on a unity3d VR project with your interaction engine.
I have come across an issue with lights and point lights in a scene
If you create a layer mask for a point light on a 3D object the light will not work.

How to recreate:
1. Create a cube
2.Create a point light
3. Create anew layer
4. Assign the cube to the layer
5. Set the light layer mask to that layer.

Also make sure you have the interaction engine scripts on the cube.

If you run the scene it will not show the light.

However if you set it to default it will.. but this defies the whole point of the layer mask which is integral to our project.

Any help or suggestion would be great
Thanks

Daniel Griffiths

[Joe_Ward]

The interaction engine needs to move intractable objects between layers. Presumably what is happening is that the interaction engine is moving your cube to a different layer and the point light, remaining in the original layer, no longer illuminates it.

You have a couple of options:

1. You can create explicit layers for the interaction engine rather than relying on the defaults. This will allow you to include the interaction layers in the light's culling mask.
2. You can create a Layer Controller class that manages the layers for objects based on its InteractionMaterial. This would allow you to use different sets of layers for different groups of interactable objects.

[Daniel.griffiths]

Hi thanks for your reply, appreciated.

I have setup custom layers for interaction, interactionNo Clip and Brushed.

It work until there is interaction.

My model is setup like this.

Cube (contains the interaction scripts and a collider no mesh renderer) (set to interaction layer)
Cube ( made in blender)(interaction)
Cube mesh with renderer ( set to cube layer)
Logo(layer set to Logo Layer)
Logo( layer set to Logo Layer)
Spot light (set to interaction layer) (mask set to Logo Layer)

It works when you first hit play, but then i notice that the interaction layer converts all children to be interaction layer of the default cube with the scripts.

Is there a way to stop it from altering all the layer of the default cube?

Thanks Daniel

[alexmarcolina]

Currently the interaction behavior uses all children objects to create the interaction representation. Because of this, it needs to update the layers of all objects that are part of that representation.

One thing you might be able to do is set the spot light to have a mask that illuminates multiple layers instead of just one. You would want to make sure that the light can illuminate the 2 possible layers that an object could be on (Interaction and InteractionNoClip). That would ensure that even as the user interacts with the object and it switches layers to be interacted with, the light continues shining on the object no matter what layer it is on.

[Daniel.griffiths]

Hmm i did try this, but as the parent cube get switched to the interaction layer by leap you can't specify any of the three interaction layers.. I am think I might tackle this from a different perspective and use a shader or find out what layer the logo is on via tags and then set the relevant values through code. not ideal but should work i think.

Will let you know if it works.

Would be nice if Leap used tags so one could have multiple tags per element making it a lot more flexible.

Thanks for you input

Best

Daniel

[Daniel.griffiths]

Hi, I have managed a fairly simple work around.
What you have to do is create a new script and declare the game objects with a serialized field so you can explicitly hook up the game object. then in the update function set it to the layer you need it to be on, if its not on the layer.

worked for me and hope it helps anyone with a similar issue.

Thanks

Daniel