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patterned plastic surfaces

Postby sunz » August 3rd, 2015, 9:17 am


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I stumbled upon this image of a color changing copic marker and its charger on yankodesign.com.
I'm interested in how the pattern on the charger is made.
Can anybody help?

Image

Re: patterned plastic surfaces

Postby Cyberdemon » August 3rd, 2015, 9:35 am

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This is just a rendered concept, so that is most likely a normal map which provides more advanced bump mapping for a rendering.

If you actually wanted to try to tackle that on a NURBS surface, I would trim out the first angled surface (that forms the triangles) and then build the 4 sided patch (which forms half of the hexagon) and tug it down slightly to create the discontinuity.

Re: patterned plastic surfaces

Postby Robbie_roy » August 4th, 2015, 7:34 pm

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I agree with Cyberdemon, this is probably not modeled, but it should not be too complicated (unlike something like the Jawbone UP bands, where the pattern is fluctuating and wrapping around a curved surface).

I gave it a quick shot in SolidWorks but as I see now, it isn't quite right. The way I have it, the long edges waver up and down, but it is straight in the rendering. I'd have to think a little more on how this actually could happen in 3d form, and maybe it isn't possible to physically model it the way that the rendering appears (bump map magic).

Image
1. Base sketch (pink) and vertical drivers (blue)

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2. Pattered + mirrored base sketch -- not really necessary except for planning.

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3. Two surface-lofts using the base sketch and vertical drivers.

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4. Linear-patterned and mirrored twice.


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