Export/Import Points将点以txt格式输出、输入

梦里梦外; 2022-06-14 07:40 78阅读 0赞

例1：将控制点以txt格式输出  
title: Export Control Points  
description: Demonstrates how to export control points with Python.

import rhinoscriptsyntax as rs
    
    def ExportControlPoints():
        "Export curve's control points to a text file"
        #pick a curve object
        object_id = rs.GetObject("Select curve", rs.filter.curve)
    
        #get the curve's control points
        points = rs.CurvePoints(object_id)
        if not points: return
    
        #prompt the user to specify a file name
        filter = "Text File (*.txt)|*.txt|All files (*.*)|*.*||"
        filename = rs.SaveFileName("Save Control Points As", filter)
        if not filename: return
    
        file = open( filename, "w" )
        for pt in points:
            file.write( str(pt.X) )
            file.write( ", " )
            file.write( str(pt.Y) )
            file.write( ", " )
            file.write( str(pt.Z) )
            file.write( "\n" )
        file.close()
    
    
    ##########################################################################
    # 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__" ):
        ExportControlPoints()

例2：  
title: Export Points  
description: Demonstrates how to export points with Python.

# Export the coordinates of point and point cloud objects to a text file.
    import rhinoscriptsyntax as rs
    
    def ExportPoints():
        #Get the points to export
        objectIds = rs.GetObjects("Select Points",rs.filter.point | rs.filter.pointcloud,True,True)
        if( objectIds==None ): return
    
        #Get the filename to create
        filter = "Text File (*.txt)|*.txt|All Files (*.*)|*.*||"
        filename = rs.SaveFileName("Save point coordinates as", filter)
        if( filename==None ): return
    
        """
        Using a 'with' loop to open the file, we do not need to clean
        up or close the file when we are done, Python takes care of it.
        Here, we'll write the points with a line break, otherwise
        all the points will end up on one line.
        """
        with open(filename, "w")as file:
    
            for id in objectIds:
                #process point clouds
                if( rs.IsPointCloud(id) ):
                    points = rs.PointCloudPoints(id)
                    for pt in points:
                        # convert the point list to a string, 
                        # add a new line character, and write to the file
                        file.write(str(pt)+ "\n")
                elif( rs.IsPoint(id) ):
                    point = rs.PointCoordinates(id)
                    file.write(str(point)+ "\n")
    
    
    ##########################################################################
    # Here we 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__' ):
        ExportPoints()

例三：从txt文件中读入点阵  
title: Import Points  
description: Demonstrates importing points from a file into Rhino

# Import points from a text file
    import rhinoscriptsyntax as rs
    
    def ImportPoints():
        #prompt the user for a file to import
        filter = "Text file (*.txt)|*.txt|All Files (*.*)|*.*||"
        filename = rs.OpenFileName("Open Point File", filter)
        if not filename: return
    
        #read each line from the file
        file = open(filename, "r")
        contents = file.readlines()
        file.close()
    
        # local helper function    
        def __point_from_string(text):
            items = text.strip("()\n").split(",")
            x = float(items[0])
            y = float(items[1])
            z = float(items[2])
            return x, y, z
    
        contents = [__point_from_string(line) for line in contents]
        rs.AddPoints(contents)
    
    
    
    ##########################################################################
    # 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__" ):
        ImportPoints()