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<div class="sw-email-modal sw--display-block"> <div id="emailModalContentContainer"> <span class="noty_close sw--position-absolute sw--position-right sw--padding-top-3 sw--padding-right-3 icon-cancel sw--opacity-8"></span> <div class="sw-row"> <div class="sw-email-modal__copy sw--position-relative sw--display-block sw--padding-vert-4"> <p class="last sw--font-size-16">Sign up to get email alerts on discount promotions. There might be one very soon...</p> <form action="/register/email-signup" class="sw-email-modal__signup sw--position-relative" data-confirmation="emailConfirmationModal" data-sw-email-modal-form> <input type="text" class="sw-email-modal__signup-input sw--input-height__medium" placeholder="Email address" name="email" /> <input type="hidden" class="sw-email-modal__signup-input" name="location" value="/product/B7PD6EX8Q/shell-2" /> <input type="hidden" class="sw-email-modal__signup-input" name="confirmation" value="emailConfirmationModal" /> <input type="submit" class="btn-primary" value="Sign Up" /> <div id="emailModalFormError" class="text-error" style="display:none"></div> </form> </div> </div> </div>

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Shell 2 3d printed

Not a Photo

White Strong & Flexible
Shell 2  3d printed
Shell 2  3d printed

Not a Photo

Shell 2

  • 3D printed in White Strong & Flexible: White nylon plastic with a matte finish and slight grainy feel.
  • Be the first to try. Learn more
  • This product is intended for mature audiences.
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Product Description

This larger shell is another form which shows the power of mathematics in reflecting the laws of nature. The opening here is perpendicular to the direction of growth. The organism always needs a similarly shaped home as it grows, which is modeled by an exponential spiral that expands at the same rate that it drops and moves out from the central axis. . This shell was created in Mathematica using the formulas developed by Deborah Fowler et al (Siggraph '92). It was cleaned and solidified in Meshlab, touched up with Netfabb Cloud. The mesh was created by a routine which perforates the polygons to a minimum width; their edges were thickened by the Meshlab "marching cubes" algorithm. It is printable in white or colored plastic, and metals which accept a .9mm minimum dimension (raw brass, bronze, and silver. Contact me if interested either in the mathematics or in a model printable in other materials.

What's in the Box
Shell 2
White Strong & Flexible
5.9 cm
10.5 cm
5.4 cm

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