Sphere example

Subclassing Anatomist objects

from __future__ import print_function

from __future__ import absolute_import
import anatomist.direct.api as anatomist
from soma import aims
import six


class ASphere(anatomist.cpp.ASurface_3):

    def __init__(self, mesh=None):
        self._center = aims.Point3df(0, 0, 0)
        self._radius = 100
        if mesh is not None:
            if type(mesh) is six.string_types:
                # mesh is a filename: read it
                anatomist.cpp.ASurface_3.__init__(self, mesh)
                r = aims.Reader()
                m = aims.rc_ptr_AimsTimeSurface_3(r.read(mesh))
                self.setSurface(m)
            else:
                # mesh should be an Aims mesh: assign it
                anatomist.cpp.ASurface_3.__init__(self)
                self.setSurface(mesh)
        else:
            # generate a sphere mesh
            anatomist.cpp.ASurface_3.__init__(self)
            m = aims.rc_ptr_AimsTimeSurface_3(aims.SurfaceGenerator.sphere(
                                              self._center, self._radius, 100))
            self.setSurface(m)

    def radius(self):
        return self._radius

    def center(self):
        return self._center

    def setCenter(self, c):
        if type(c) is not aims.Point3df:
            c = aims.Point3df(*c)
        cdiff = c - self._center
        self._center = c
        # translate all
        v = self.surface().vertex()
        for vi in v:
            vi += cdiff
        self.setChanged()
        self.UpdateMinAndMax()
        self.notifyObservers()

    def setRadius(self, r):
        if r == 0:
            print('can\'t assign radius 0')
            return
        scl = float(r) / self._radius
        self._radius = float(r)
        # scale all
        v = self.surface().vertex()
        c = self._center
        for vi in v:
            vi.assign((vi - c) * scl + c)
        self.setChanged()
        self.UpdateMinAndMax()
        self.notifyObservers()

# example


if __name__ == '__main__':
    a = anatomist.Anatomist()
    s = ASphere()
    s.setName('sphere')
    a.registerObject(s)

    # import qt
    # qt.qApp.exec_loop()