vtk类之vtkTextSource：显示一个文本的poly data

vtkTextSource  转换一个字符串成poly data。

基本方法：

SetText('Hello, welcome')  设置显示的文本内容
SetForegroundColor(0.1, 1.0, 0.5) 设置文本的颜色
etBackgroundColor(1.0, 0, 1.0) 设置文本的背景色

例子：

#-*- coding: UTF-8 -*-
#-------------------------------------------------------------------------------
# Name:        模块2
# Purpose:
#
# Author:      ankier
#
# Created:     12-12-2012
# Copyright:   (c) Ankier 2012
# Licence:     <your licence>
#-------------------------------------------------------------------------------

from ActorFactory import ActorFactory

from vtk import *
## @detal 显示文本的actory factory
class TextActorFactory(ActorFactory):
    def __init__(self):
        ActorFactory.__init__(self)        
        self.__TextSource = vtkTextSource()        
        
    def _MakeActors(self):
        self.__TextSource.SetText('Hello, welcome')      
        self.__TextSource.SetForegroundColor(0.1, 1.0, 0.5)
        self.__TextSource.SetBackgroundColor(1.0, 0, 1.0)
        
        
        polyDataMapper = vtkPolyDataMapper()
        polyDataMapper.SetInput(self.__TextSource.GetOutput())
        
        actor = self._NewActor()
        actor.SetMapper(polyDataMapper)
        actor.GetProperty().SetColor((1.0, 0.7, 0.2))
        actor.SetPosition(-27.0, 0, 0)
        
        return [actor]
    
    def __del__(self):
        del self.__TextSource

运行效果：