As facet stiffness becomes very high, this simulation approaches a <ahref="http://www.tsg.ne.jp/TT/cg/TachiFreeformOrigami2010.pdf"target="_blank">

rigid origami simulation</a>, and models the behavior of a rigid material (such as metal) when folded.<br/>

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Internally, constraints stiffnesses are scaled by the length of a particular constraint to determine its <i>geometric stiffness</i>. For Axial constaints, stiffness is

Internally, constraints stiffnesses are scaled by the length of the edge associated with that constraint to determine its <i>geometric stiffness</i>. For Axial constaints, stiffness is

divided by length and for angular constraints, stiffness is multiplied by length.<br/>

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Since this is a dynamic simulation, vertices of the origami move with some notion of acceleration and velocity. In order to