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Description
This design is inspired by a snail shell, which is spiral in shape and can be used as a shield for protection purpose. The partial shelter has covered layers almost all around, looks more like a distorted open dome. It can be used as a bus stop, protecting people inside from rain, snow and sun. The initial and final radius, height and number of loops is predefined to firstly create a set of points along the paths. A cosine and sine function are then inputted to locate the points in x-y plane. The incremental height is defined using "initialheight..finalheight..#numOfPoints" code block. Having all the x, y, z components available for each set of points, three curves are drawn using "NurbsCurve,ByControlPoints" node. Those curves are then further divided into a number of points, depending on how many ribs want by the designer. Adaptive component is selected to link three rib points together and place a rib in between. Lastly, each rib is represented by a curve and are placed by panel points at equal distance along the curve. A list of quadrilaterals is then created to allow placement of panel components to the model.
This model has a lot of parametric flexibilities. User-defined parameters/components are listed as follows: degree of spiral opening, initial and final height of the spiral, initial and final radius of the spiral, number and type of ribs, number and type of panels.