# -*- coding: utf-8 -*-
from enthought.traits.api import HasTraits, Button, Instance
from enthought.traits.ui.api import View, Item, HSplit, VGroup
from enthought.tvtk.pyface.scene_editor import SceneEditor
from enthought.mayavi.tools.mlab_scene_model import MlabSceneModel
from enthought.mayavi.core.ui.mayavi_scene import MayaviScene
from enthought.tvtk.api import tvtk

class FieldViewer(HasTraits):

    plotbutton = Button("plot")
    scene = Instance(MlabSceneModel, ()) # mayavi场景
    view = View(
        HSplit(
            VGroup(
                Item('plotbutton', show_label=False),
                Item('scene',
                    editor=SceneEditor(scene_class=MayaviScene), # 设置mayavi的编辑器
                    resizable=True,height=300,show_label=True)
            ),
        ),
        width = 1024, height=768, resizable=True,
    )
   
    def __init__(self):
       
        cs = tvtk.ConeSource(height=30.0, radius=10.0, resolution=36)
        m = tvtk.PolyDataMapper(input = cs.output)
        a = tvtk.Actor(mapper=m)
        self.scene.add_actor(a)
       
app = FieldViewer()
app.configure_traits()

能不能自动生成或者添加这个actor的pipeline呢

我想给这个actor再添加一个切片工具 scalar_cut_plane 但是流水线没有这个actor

你在Mayavi的scene中创建了一个TVTK的流水线，当然在mayavi的流水线中看不到东西了。

应该用Mayavi的命令创建流水线，下面是程序：

# -*- coding: utf-8 -*-
from enthought.traits.api import HasTraits, Button, Instance
from enthought.traits.ui.api import View, Item, HSplit, VGroup
from enthought.tvtk.pyface.scene_editor import SceneEditor
from enthought.mayavi.tools.mlab_scene_model import MlabSceneModel
from enthought.mayavi.core.ui.mayavi_scene import MayaviScene

class FieldViewer(HasTraits):

    plotbutton = Button("plot")
    scene = Instance(MlabSceneModel, ()) # mayavi场景
    view = View(
        HSplit(
            VGroup(
                Item('plotbutton', show_label=False),
                Item('scene',
                    editor=SceneEditor(scene_class=MayaviScene), # 设置mayavi的编辑器
                    resizable=True,height=300,show_label=True)
            ),
        ),
        width = 1024, height=768, resizable=True,
    )
   
    def __init__(self):
        engine = self.scene.engine
        from mayavi.sources.builtin_surface import BuiltinSurface
        builtin_surface = BuiltinSurface(source="cone")
        builtin_surface.data_source.resolution = 100
        engine.add_source(builtin_surface, self.scene)
        
        from mayavi.modules.surface import Surface
        surface = Surface()
        engine.add_filter(surface, builtin_surface)
        
        from mayavi.modules.scalar_cut_plane import ScalarCutPlane
        scalar_cut_plane = ScalarCutPlane()
        engine.add_filter(scalar_cut_plane, builtin_surface)        
        
app = FieldViewer()
app.configure_traits()

有mayavi的流水线，方便手动进行操作并且记录下来生成代码

source = Enum('arrow', 'cone', 'cube', 'cylinder', 'disk', 'earth', 'line', 'outline', 'plane', 'point', 'polygon', 'sphere', 'superquadric', 'textured sphere', 'glyph2d'）

上边的 tvtk.ConeSource是个例子，我想画个不规则图形

过程是通过立体函数来生成数据，然后通过tvtk.ImageData， tvtk.ContourFilter，tvtk.PolyDataMapper
最终生成一个actor

    contours = tvtk.ContourFilter(input = data) 
    contours.number_of_contours = 1 
    contours.set_value(0, 0) 
    contours.update() 
    mapper = tvtk.PolyDataMapper(input = contours.output) 
    p = tvtk.Property(opacity=0.3, color=(0, 0.3, 0.3))
    actor = tvtk.Actor(mapper = mapper, property=p) 

这种actor怎么通过BuiltinSurface画出来才能在mayavi的流水线中看到呢

或者怎么把图形的数据mapper 或者 data 或者contours.output让mayavi画出来呢

比如之前这个画圆柱的例子

# -*- coding: utf-8 -*-
from enthought.traits.api import HasTraits, Button, Instance
from enthought.traits.ui.api import View, Item, HSplit, VGroup
from enthought.tvtk.pyface.scene_editor import SceneEditor
from enthought.mayavi.tools.mlab_scene_model import MlabSceneModel
from enthought.mayavi.core.ui.mayavi_scene import MayaviScene
from enthought.tvtk.api import tvtk
import numpy as np

def transform(x, y, z, rx, ry, rz, sx, sy, sz, tx, ty, tz):
    from numpy import sin, cos, dot
    rx, ry, rz = np.deg2rad([rx, ry, rz])
    fx, fy, fz = x.flatten(), y.flatten(), z.flatten()
    ones = np.ones(len(fx))
    p = np.r_[[fx], [fy], [fz], [ones]]
    mx = np.array([
        [1, 0, 0, 0],
        [0, cos(rx), sin(rx), 0],
        [0, -sin(rx), cos(rx), 0],
        [0, 0, 0, 1]
    ])
    my = np.array([
        [cos(ry), 0, -sin(ry), 0],
        [0, 1, 0, 0],
        [sin(ry), 0, cos(ry), 0],
        [0, 0, 0, 1]
    ])
    mz = np.array([
        [cos(rz), sin(rz), 0, 0],
        [-sin(rz), cos(rz), 0, 0],
        [0, 0, 1, 0],
        [0, 0, 0, 1]
    ])
    s = np.array([
        [1.0/sx, 0, 0, 0],
        [0, 1.0/sy, 0, 0],
        [0, 0, 1.0/sz, 0],
        [0, 0, 0, 1]
    ])
    t = np.array([
        [1, 0, 0, 0],
        [0, 1, 0, 0],
        [0, 0, 1, 0],
        [-tx, -ty, -tz, 1]
    ])
     
    m = dot(t, dot(s, dot(mz, dot(my, mx))))
    p = np.dot(m, p)
 
    x = p[0,:].reshape(x.shape)
    y = p[1,:].reshape(y.shape)
    z = p[2,:].reshape(z.shape)
    return x, y, z
     
def f1(x, y, z):
    x,y,z = transform(x,y,z, 0, 0, 0, 1, 1, 1, 0, 0, 0)
    return x**2 + z**2 + 0*y - 60.0 *60.0

def make_image(f,x0,x1,y0,y1,z0,z1,N):
    global z, y, x
    z, y, x = np.mgrid[z0:z1:1j*N,y0:y1:1j*N, x0:x1:1j*N]
    d = f(x, y, z)
    dx, dy, dz = float(x1-x0)/(N-1), float(y1-y0)/(N-1), float(z1-z0)/(N-1)
    img = tvtk.ImageData(dimensions=(N,N,N), origin=(x0,y0,z0), spacing=(dx,dy,dz))
    img.point_data.scalars = d.flatten()
    return img
     
def make_surface(*args):
    img = make_image(*args)
    contours = tvtk.ContourFilter(input = img)
    contours.number_of_contours = 1
    contours.set_value(0, 0)
    contours.update()
    mapper = tvtk.PolyDataMapper(input = contours.output)
    p = tvtk.Property(opacity=0.3, color=(1, 0.5, 0.3))
    actor = tvtk.Actor(mapper = mapper, property=p)
    return contours.output, actor


class FieldViewer(HasTraits):

    plotbutton = Button("plot")
    scene = Instance(MlabSceneModel, ()) # mayavi场景
    view = View(
        HSplit(
            VGroup(
                Item('plotbutton', show_label=False),
                Item('scene',
                    editor=SceneEditor(scene_class=MayaviScene), # 设置mayavi的编辑器
                    resizable=True,height=300,show_label=True)
            ),
        ),
        width = 1024, height=768, resizable=True,
    )
   
    def __init__(self):
        parameters = [-100,100,-100,100,-100,100,50]
        poly, a = make_surface(f1, *parameters)
        self.scene.add_actor(a)
          
app = FieldViewer()
app.configure_traits() 

没有搞懂你要问什么。是如何在Mayavi中生成等值面吗？

想画一个f1()函数确定的一个图形

用tvtk可以按照

tvtk.ImageData， tvtk.ContourFilter，tvtk.PolyDataMappe 顺序生成一个actor，加入scene中，

但是SceneEditor中不显示流水线，我就不能再对这个actor通过流水线进行交互的操作

1. 想还是这样生成actor，但能不能让SceneEditor里显示流水线，

   这样通过流水线鼠标操作我想再加个切面或者其他的操作

2. 要是1行不通，必须用mayavi画才能在SceneEditor中有流水线，
   
   那mayavi怎么样画f1()函数确定的这个图形呢

mayavi的等值面在书里面有介绍: mlab.contour3d