Grasshopper

algorithmic modeling for Rhino

Accurate RGB mapping data?

Hi Friends,

Assuming that I'm mapping a series of surfaces on a hemisphere. I want to assign each surface normal as RGB color to each projected surface. Is there any way to record and export it as JPEG, PNG or anything accurately?

When I assign the RGB data to the surface preview I cannot get the same data when I export and read the pixel RGB data. I tired different style and none of them work accurately.

You see the differences below by compering the little circle inside each projected surface.

Any help is very appreciated.

Views: 451

Replies to This Discussion

Permalink Reply by Andrew Heumann on October 2, 2017 at 9:01am

the custom preview component will always shade the geometry - if you use "mesh colors" instead it will come out unshaded and color-accurate to your input RGB values. 

Permalink Reply by navid on October 2, 2017 at 9:45am

Thanks a lot Andrew, it works now.

Permalink Reply by David Rutten on October 2, 2017 at 11:29am

Hmm, that too depends on the Rhino viewport display mode. Certainly in Rhino6 it is possible to have vertex-coloured meshes shaded.

Permalink Reply by navid on October 2, 2017 at 11:49am

mean while, do you know how can I export a specific rectangle from rhino as an image? Or, how can I set the view port size?

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