#!/usr/bin/env python """ An example of how to modify the data visualized via an interactive dialog. A dialog is created via `TraitsUI <http://code.enthought.com/projects/traits/>`_ from an object (MyModel). Some attributes of the objects are represented on the dialog: first a Mayavi scene, that will host our visualization, and two parameters that control the data plotted. A curve is plotted in the embedded scene using the associated mlab.points3d function. The visualization object created is stored as an attribute on the main MyModel object, to modify it inplace later. When the `n_meridional` and `n_longitudinal` attributes are modified, eg via the slide bars on the dialog, the curve is recomputed, and the visualization is updated by modifying inplace the stored plot object (see :ref:`mlab-animating-data`). This example is discussed in details in the section :ref:`embedding_mayavi_traits`. """ # Author: Gael Varoquaux <gael.varoquaux@normalesup.org> # Copyright (c) 2008, Enthought, Inc. # License: BSD Style. from numpy import arange, pi, cos, sin from enthought.traits.api import HasTraits, Range, Instance, \ on_trait_change from enthought.traits.ui.api import View, Item, Group from enthought.mayavi.tools.mlab_scene_model import MlabSceneModel from enthought.mayavi.core.api import PipelineBase from enthought.mayavi.core.ui.api import MayaviScene, SceneEditor dphi = pi/1000. phi = arange(0.0, 2*pi + 0.5*dphi, dphi, 'd') def curve(n_mer, n_long): mu = phi*n_mer x = cos(mu) * (1 + cos(n_long * mu/n_mer)*0.5) y = sin(mu) * (1 + cos(n_long * mu/n_mer)*0.5) z = 0.5 * sin(n_long*mu/n_mer) t = sin(mu) return x, y, z, t class MyModel(HasTraits): n_meridional = Range(0, 30, 6, )#mode='spinner') n_longitudinal = Range(0, 30, 11, )#mode='spinner') scene = Instance(MlabSceneModel, ()) plot = Instance(PipelineBase) # When the scene is activated, or when the parameters are changed, we # update the plot. @on_trait_change('n_meridional,n_longitudinal,scene.activated') def update_plot(self): x, y, z, t = curve(self.n_meridional, self.n_longitudinal) if self.plot is None: self.plot = self.scene.mlab.plot3d(x, y, z, t, tube_radius=0.025, colormap='Spectral') else: self.plot.mlab_source.set(x=x, y=y, z=z, scalars=t) # The layout of the dialog created view = View(Item('scene', editor=SceneEditor(scene_class=MayaviScene), height=250, width=300, show_label=False), Group( '_', 'n_meridional', 'n_longitudinal', ), resizable=True, ) my_model = MyModel() my_model.configure_traits()