Hi everybody I am trying to create a surface where all the normals of the surface hit one specific point. yes i know that means this would just be a part of a sphere and the point would be the center of the sphere. But this is just a simplified version of what i want to achive. i tried doing this …

Your problem doesn’t really fit well for this approach. Galapagos basically tries to find the local extremes (min or max) of the fitness function. You will obviously get a pretty good hit with a basically flat surface. Once you start to move individual points, the normals may diverge wildly. Si…

ah ok good to know Thanks :slight_smile:

[image] chris.pm: But this is just a simplified version of what i want to achive. Since for the basic question you provided the answer … what are you trying to achieve?

in my case it wouldn’t be the normals that would need to go to a certain location but curves that are defined by a function (the refraction of light - sin(alpha)/sin(beta)=n2/n1= [xxxxx] so as shown here in this diagramm. i have paralell light incoming and i want to find a geometry that “bends” li…

Hmm … a sequel on this? [image] Issue with multiple trimmed surfaces Grasshopper Hi I have a icosphere made up of a lot of trimmed surfaces. Now I am trying to reflect light rays of this object using the mosquito plugin but somehow it is having issues with the trimmed …

what you’re doing here is some sort of inverse Fresnel lens system. If it were a 2D version, you could just push the individual prisms back into place to form a continuous surface. Now since you are in 3d and you don’t control any continuity constraints between neighboring cells, you end up with so…

hi thanks for your input I also have a version of a normal fresnel lens. the one in the post bevore was just an attempt to get closer to a smooth continous surface. but not very succesfull. because as you say. in 2d i can just move them and let them continue. but it doesn’t work in 3d -> see the b…

you don’t happen to have any brilliant ideas how to go about this idea?? :rofl: I’m a bit lost

[image] chris.pm: how to go about [Screen%20Shot%20156]

Modify surface with galapagos so normals hit 1 specific point

Grasshopper

crz_06 (crz_06) May 8, 2023, 5:57am 16

for future references: Let’s connect the topic you mentioned and mine, which is also similar in nature.

How to build or rebuild a surface with pre-defined normals
Optimizing Facet Arrangement for a Smoother Optical Surface

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Modify surface with galapagos so normals hit 1 specific point

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