bricks

gistfile1.py

import System
import Rhino


from scriptcontext import doc

tol = 0.001

class Brick(object):

    centerOfMass = None
    xSize = Rhino.Geometry.Interval(-1.0, 1.0)
    ysize = Rhino.Geometry.Interval(-0.5, 0.5)
    zSize = Rhino.Geometry.Interval(0.0, 0.5)

    def __init__(self, plane):
        self.plane = plane
        self.makeShape()

    def makeShape(self):
        self.box = Rhino.Geometry.Box(self.plane, self.xSize, self.ysize, self.zSize)

    def evalCenterOfMass(self, bricks):
        firstBbox = bricks[0].box.BoundingBox
        xs = [b.box.Center.X for b in bricks]
        ys = [b.box.Center.Y for b in bricks]
        self.centerOfMass = Rhino.Geometry.Point3d(sum(xs)/len(xs), sum(ys)/len(ys), 0.25 )
        self.ok = firstBbox.Contains(self.centerOfMass)

    def setColor(self):
        if self.ok:
            self.color = System.Drawing.Color.Green
        else:
            self.color = System.Drawing.Color.Red

    def evalPrevious(self, others):
        pass

    def findNext(self, curve):
        newLevel = self.plane
        newLevel.OriginZ += self.zSize.T1
        crvIntx = Rhino.Geometry.Intersect.Intersection.CurvePlane( curve, newLevel, tol)
        if crvIntx:
            return True, Rhino.Geometry.Plane(crvIntx[0].PointA, Rhino.Geometry.Plane.WorldXY.ZAxis)
        else:
            return False, None

def makeBricks(curve):
    worldXY = Rhino.Geometry.Plane.WorldXY
    crvIntx = Rhino.Geometry.Intersect.Intersection.CurvePlane( curve, worldXY, tol)
    plane = Rhino.Geometry.Plane(crvIntx[0].PointA, worldXY.ZAxis)
    bricks = []
    onCurve = True
    while onCurve:
        b = Brick(plane)
        bricks.append(b)
        b.evalCenterOfMass(bricks)
        b.setColor()
        onCurve, plane = b.findNext(curve)
    # make the bricks
    for brick in bricks:
        att = Rhino.DocObjects.ObjectAttributes()
        att.ObjectColor = brick.color
        att.ColorSource = Rhino.DocObjects.ObjectColorSource.ColorFromObject
        brep = Rhino.Geometry.Brep.CreateFromBox( brick.box )

        doc.Objects.AddBrep(brep, att)

if __name__=='__main__':
    curve = doc.Objects.FindByLayer('curve')[0].Geometry
    makeBricks( curve )