digital futures » curve http://www.digitalfutures.info digital futures Sat, 24 Apr 2010 14:06:18 +0000 http://wordpress.org/?v=2.8.4 en hourly 1 Concept: Curves http://www.digitalfutures.info/1/concept-curves / http://www.digitalfutures.info/1/concept-curves /#comments Thu, 12 Nov 2009 15:55:51 +0000 GAkos http://www.digitalfutures.info/?p=711 20091109_ghx060035_Curves_IntroductionWeb

Lines, Polylines, and Curves can be described both geometrically and numerically.

The numeric description of any of these geometry types can be understood as the “Parameter Space” of the curve. This space is one dimensional and not necessarily tied to the Euclidean space of the modeling environment but is always tied to the topology of the curve. The bounds of this space is called the “Curve Domain” which can be navigated numerically through the native domain or through a “Reparameterized” domain that forces the bounds to be 0.0 and 1.0. The current value at which this navigation is possible is called the “t” value or “parameter.”

This Curve Primer constructs curves and their unrolled counterparts allowing user interaction as well as generating live visual feedback.

Download the Grasshopper Definition (version 0.6.0019) from modeLab.

]]> http://www.digitalfutures.info/1/concept-curves /feed/ 0 Rhino.Script: Array around curve http://www.digitalfutures.info/1/rhino-script-array-around-curve / http://www.digitalfutures.info/1/rhino-script-array-around-curve /#comments Fri, 21 Aug 2009 20:48:47 +0000 RSarrach http://www.digitalfutures.info/?p=16

rhinoscript-array-around-curve-1_2

The following script allows you to array an object around a curve and designate a rotation.

You will need to do the following to execute the script

1. Select an object.
2. Set the “cplane” by designating 3 points (origin, X, Y)
2. Select a “curve” the array will occupy
3. Select the # in your array
4. Designate the degree of rotation.

Code
  1. Option Explicit'Script written by David Mans http://www.neoarchaic.net
  2.  'Script copyrighted by core.form-ula under Creative Commons
  3.  'Script version Tuesday, September 09, 2008 2:59:56 PM
  4.  
  5. Call Main()
  6.  
  7. Sub Main()
  8.  
  9. Call arrayRotateAboutCurve()
  10.  
  11. End Sub
  12.  
  13. Function arrayRotateAboutCurve()
  14.  
  15. arrayRotateAboutCurve = Null
  16.  
  17. Dim i,j, objects,angle, originPln, steps, curve, pt(2), dom, crvFrame, rotFrame
  18.  
  19. objects = Rhino.GetObjects("Select Objects")
  20.  
  21. If isNull(objects) Then Exit Function
  22.  
  23. pt(0) = Rhino.GetPoint("Select Origin Point")
  24.  
  25. If isNull(pt(0)) Then Exit Function
  26.  
  27. pt(2) = Rhino.GetPoint("Select Point for X Axis")
  28.  
  29. If isNull(pt(2)) Then Exit Function
  30.  
  31. pt(1) = Rhino.GetPoint("Select Point for Y Axis")
  32.  
  33. If isNull(pt(1)) Then Exit Function
  34.  
  35. originPln = Rhino.PlaneFitFromPoints(pt)
  36.  
  37. curve = Rhino.GetObject("Select Curve",4)
  38.  
  39. If isNull(curve) Then Exit Function
  40.  
  41. steps = Rhino.GetReal("Count",10)
  42.  
  43. If isNull(steps) Then Exit Function
  44.  
  45. angle = Rhino.GetReal("Rotational Increment", 15)
  46.  
  47. If isNull(angle) Then Exit Function
  48.  
  49. Call Rhino.EnableRedraw(False)
  50.  
  51. Call rhino.SelectObject(curve)
  52.  
  53. Call rhino.Command("reparameterize 0 1")
  54.  
  55. Call rhino.UnselectAllObjects()
  56.  
  57. dom = Rhino.CurveDomain(curve)(1)
  58.  
  59. For i = 0 To steps Step 1
  60.  
  61. crvFrame = Rhino.CurvePerpFrame(curve,(dom/steps)*i)
  62.  
  63. rotFrame = Rhino.RotatePlane(crvFrame,angle*i,crvFrame(3))
  64.  
  65. For j = 0 To uBound(objects) Step 1
  66.  
  67. Call Rhino.OrientObject(objects(j),pt,array(rotFrame(0),Rhino.PointAdd(rotFrame(0),rotFrame(1)),Rhino.PointAdd(rotFrame(0),rotFrame(3))),1)
  68.  
  69. Next
  70.  
  71. Next
  72.  
  73. Call Rhino.EnableRedraw(True)

Rhino.Script: Array around curve

via core.form-ula

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