[Solved] Surface Attachable Parts - Orientation and Unity Setup

[cxg2827]

Are there any rules for setting up pats in Unity for parts specifically made to be surface attached? Do the colliders need to be oriented a certain way in relation to the Parts Tools empty object so that when they are placed on a surface, they are facing the "correct" way and don't need to be rotated?

Also, with regards to surface attaching, is the point of attachment based on the parts CoG or is it dependent on the collider?

 

Here is a part I am working on, but have similar issues with other surface attachable parts I am creating. I have it oriented in Unity so that it is displayed properly in the Parts window in the left pane [first image in the album]. However, when trying to surface attach the part to a craft, it requires to be rotated along 2 axis [second image in the album].

 

 

Edited June 26, 2016 by cxg2827

[Stone Blue]

3 minutes ago, cxg2827 said:

Are there any rules for setting up pats in Unity for parts specifically made to be surface attached? Do the colliders need to be oriented a certain way in relation to the Parts Tools empty object so that when they are placed on a surface, they are facing the "correct" way and don't need to be rotated?

I think you just set your collider to match your part in Unity, whatever the part's orientation is...
Your top level, empty GameObject will have the final orientation, for how the part shows up in-game... So you set it for howver you want your part to start out...It doesnt matter that its a surface attach part or not...
 

12 minutes ago, cxg2827 said:

Also, with regards to surface attaching, is the point of attachment based on the parts CoG or is it dependent on the collider?

Neither... Its based on whatever coords you assign to "node_attach = " in the config... I gather "node_attach" is SPECIFICALLY a surface attach point, or node... I dont think you even need a "node_attach" defined in the .cfg if you have srfAttach set to "0" in the attachment rules...

 

[nli2work]

it's based on offset from the root position. has nothing to do with collider.

node_attach = Offset from Root X, Y, Z, Direction X, Y, Z, node Size (not used in surface attach).

e.g. node_attach = 0,0,0,1,0,0,0 will attach from the part's root; with the root's +X pointed at whatever it is attaching to.

Edited June 26, 2016 by nli2work

[cxg2827]

2 hours ago, Stone Blue said:

Neither... Its based on whatever coords you assign to "node_attach = " in the config... I gather "node_attach" is SPECIFICALLY a surface attach point, or node... I dont think you even need a "node_attach" defined in the .cfg if you have srfAttach set to "0" in the attachment rules...

 

2 hours ago, nli2work said:

it's based on offset from the root position. has nothing to do with collider.

node_attach = Offset from Root X, Y, Z, Direction X, Y, Z, node Size (not used in surface attach).

e.g. node_attach = 0,0,0,1,0,0,0 will attach from the part's root; with the root's +X pointed at whatever it is attaching to.

 

Thanks guys, I realized my mistake as I didn't even have a "node_attach" assigned in my CFG. I was assuming that the surface attachment was based on mating of the collider surfaces (solidworks mindset).