Tutorial 3

1 Use the Section tool, in the command line select ‘Join Curves= By Section Plane’

2 Move the curves and type ‘rebuild’ in the command line- rebuild the curves between ten and twenty points with 3 degrees

3 Type ‘loft’ in the command line. Adjust the seam of the loft by moving the arrows on the curves- the arrows must be pointing in the same direction

4 Put the curves and lofted surface on separate layers

5 Type rebuild in the command line and rebuild the surface

6 In the command line type “UnrollSrf” Explode=NO Labels=NO

7 Select the unrolled surface and duplicate the border “DupBorder”.

8 Put the Unrolled surface and border on separate layers.

9 Open Grasshopper, in the work space add the batteries:  Populate 2D, Voronoi, Offset curve, and Map to Surface.

10 Add 2 Number Sliders, one an integer 0 to200, and a floating point -5.00 to 1.00. Add a Curve, a Regional Difference and 2 Surface batteries.

11 On the Populate 2D battery right click on the R, select “set one rectangle” , and draw a rectangle around the unrolled surface, and on the Voronoi battery right click on the B, select “set one Box” and draw a box in the same location as the rectangle.

12 Add the Integer Number Slider to Populate 2D, add the P out of Populate 2D to the P in the Voronoi, and the C out of the Voronoi to the C  of the OffSet Curve, add the Floating Point Number Slider into the D of the Offset Curve. Turn off the preview of all the Batteries to the left of Regional Difference.  Adjust the Number Sliders until you get a good consistent pattern.

13 Right click on the Curve Battery and “select one curve”, select the border curve of the unrolled surface.  Add the Curve to the A of the Regional Difference, and the Offset Curve to the B of the Regional Difference.  Add the surfaces to the Surface Batteries and add them to the Map to Surface Battery.  And add the Regional Difference to the Map to Surface.

14 Bake the Map to surface to a new layer. Select all the batteries in Grasshopper and disable the preview.

15 Use the split tool in Rhino. Select the surface to split, then drag around all the curves to split the surface.

16. Type Offset Surface in the command line, select the pattern to thicken, make sure you have selected make solid in the command line and the arrows are going outwards.

17. Put the solid pattern on a new layer and turn off the target surface layer.