Uniform Rotation

Hi,

I am working on a script that moves, copies and rotates one component on a surface.

However once the component is on the surface the xy rotation is random. How can I uniform the rotation along the same axis, which is the one from the original component?

Thank you

Attachments:

Rotate_Petals.gh, 11 KB
Rotate Petals.3dm, 110 KB

Replies to This Discussion

Permalink Reply by Lucas Becker on August 16, 2014 at 4:37pm

The problem is caused by the axis. You can see them in yellow here.

My solution can't be the best, cause it's still inaccurate (think of quick and dirty). But it's also a little better then before (imho).

Attachments:

Rotate_Petals.gh, 13 KB

Permalink Reply by Pieter Segeren on August 17, 2014 at 5:13am

Hi Laura,

here's what I think you meant to do:

Attachments:

Rotate_Petals_PSG.gh, 23 KB

Permalink Reply by Lucas Becker on August 17, 2014 at 4:57pm

Wow, thats neat!

I like your solution. Laura? Forget mine!

Permalink Reply by Laura on August 18, 2014 at 2:54am

Hi Pieter,

thanks you sorted. I am bit new in GH... I would like to understand what you did.

What is the function of the MD Slider?

Thank you for the help

Permalink Reply by Pieter Segeren on August 18, 2014 at 4:29am

Hi Laura, you're welcome.
At first I didn't understand your question, but after seeing what Lucas did, I figured it might be this you were after. So thank you Lucas.

Note: To make things easier to see I scaled all your geometry by factor 0.05, that way the planes are visible.
The Surface Closest Points results in the uv coordinates on your surface.
The Evaluate Surface finds the surface normal at these locations (plus a plane (Frame), which I should have used instead of the one from the Plane Normal (I deleted that here)).
Then the found planes are aligned by the vector from the MDSlider.
Finally the petal groups are oriented to these planes.

May I suggest you read the primer by Andy Payne. Even though it's rather outdated it will steepen your learning curve a lot I think.

I've attached a new definition, with scaled down geometry internalized.

Have a nice day.

Attachments:

Rotate_Petals_v2_PSG.gh, 32 KB

Permalink Reply by Laura on August 18, 2014 at 5:03am

Cool

thanks for the explanation.

I was wondering about the MD Slider as I never used it.

Thank you for the help

Have a good day too

Permalink Reply by SA on August 18, 2014 at 4:33am

Hey Pieter, thanks a lot for the explanation. Great !!!

Permalink Reply by Pieter Segeren on August 18, 2014 at 5:09am

Nice of you to say that Aakriti, thanks.

B.t.w. Laura: If you don't group the three original petals, you can just graft the input B (target planes) of the Orient component. I guess I just stuck to the inputs as they were in Lucas' file... (I don't usually use groups)

Permalink Reply by Laura on August 18, 2014 at 5:52am

Thank you very much for the suggestion.

Last question, did you place the MD Slider value intuitively or you calculate the exact rotation?

Permalink Reply by Pieter Segeren on August 18, 2014 at 6:27am

Did I place it? No, as I don't know which direction you want, it is pretty much random. You can create your alignment vector any way you want. It's just that I don't understand what should define your alignment vector here...

Permalink Reply by Laura on August 18, 2014 at 7:12am

No I didn't.

I was trying to figure out how I can set the exact alignment.

I attached an image with the alignment axis. Which would be for you the most efficient way?

Attachments: