Reflect ''a Surface of Mathcad structure'' in a Origin ?

[lvl107]

Hi, Everyone.
From the following:

Thanks in advance for your time and help.
Best Regards.
Loi.

[Werner_E]

I am not sure if you really mean what you write!

Mirroring at the point of origin (0/0/0) means that the sign of all coordinates is changed. So a minus in front of the whole vector is enough for this.

[lvl107]

I appreciate your time and help, Werner.🙂 Is there a any way without "by hand"

Best Regards.

Loi.

[Werner_E]

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@lvl107 wrote:

I appreciate your time and help, Werner.🙂 Is there a any way without "by hand"

Best Regards.

Loi.

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I don't understand your question.

You sure can define a function f(x):=-x and call it with the vector as its argument. But I won't consider this being simpler.

[lvl107]

Could you make me a "lantern" as a gift, say: 8 different color on 8 "structure". ( I'm going to
choose and buy a lantern for my grandchild tomorrow, for Mid-autumn Festival in Asia )
Best Regards.
Loi.

[Werner_E · Accepted solution]

Do you have something like this in mind?

Not sure if it a lantern, though 😉

[Werner_E]

Or should it be something like this?

[lvl107]

Oh, Yea...h, I prefer a your "Maybe_a_lantern2.",Werner. 🤔
You gave me model of lantern as gift!. And tomorrow, I guess I had a good Idea to buy a lantern as gift to my grandchild ! 😉

(any more structure?)

Best Regards.
Loi.

[Werner_E]

You are welcome!

Have a nice Mid-autumn Festival  (Sept. 10th this year?) and buy your grandchild the most beautiful lantern you can get your hand on 😉

BTW, the Mathcad lantern may look even better with Lighting on

[Werner_E]

You may be interested to hear that you can let Mathcad create the necessary structure for the first lantern segment using the parameter representation of a sphere and the function CreateMesh. And, no, you cant evaluate the result symbolically, only numerically.

You may also add sort of a scaling-factor in z-direction