Draw a Parametric Curve

快来打我* 2022-06-14 07:39 140阅读 0赞

import rhinoscriptsyntax as rs
    import math
    
    # Something really interesting about this script is
    # that we are passing a function as a parameter函数的参数是一个函数名
    def DrawParametricCurve(parametric_equation): 
        "Create a interpolated curve based on a parametric equation."
        # Get the minimum parameter
        t0 = rs.GetReal("Minimum t value", 0.0)
        if( t0==None ): return
    
        # Get the maximum parameter
        t1 = rs.GetReal("Maximum t value", 1.0)
        if( t1==None ): return
    
        # Get the number of sampling points to interpolate through
        count = rs.GetInteger("Number of points", 50, 2)
        if count<1: return
    
        arrPoints = list()
        #Get the first point
        point = parametric_equation(t0)
        arrPoints.append(point)
    
        #Get the rest of the points
        for x in xrange(1,count-2):
            t = (1.0-(x/count))*t0 + (x/count)*t1
            point = parametric_equation(t)
            arrPoints.append(point)
    
        #Get the last point
        point = parametric_equation(t1)
        arrPoints.append(point)
    
        #Add the curve
        rs.AddInterpCurve(arrPoints)
    
    
    #Customizable function that solves a parametric equation
    def __CalculatePoint(t):
        x = (4*(1-t)+1*t ) * math.sin(3*6.2832*t)
        y = (4*(1-t)+1*t ) * math.cos(3*6.2832*t)
        z = 5*t
        return x,y,z
    
    ##########################################################################
    # Check to see if this file is being executed as the "main" python
    # script instead of being used as a module by some other python script
    # This allows us to use the module which ever way we want.
    if( __name__ == "__main__" ):
        #Call the function passing another function as a parameter
        DrawParametricCurve(__CalculatePoint)