Source

yt.rife / main_engine.py

from functools import wraps
import pyro

def requires_pf(func):
    @wraps(func)
    def wrap(self, *args, **kwargs):
        if self.pf is None: raise RuntimeError
        return func(self, *args, **kwargs)
    return wrap

class VolumeRenderingHandler(object):
    pf = None

    def load(self, fn, resolution = 1024):
        self.pf = load(fn)
        if self.pf is None: raise IOError(fn)
        c = (self.pf.domain_right_edge + self.pf.domain_left_edge)/2.0
        self.cam = self.pf.camera(c, [1.0, 1.0, 1.0],
                      1.0/pf['unitary'], resolution, None)

    @requires_pf
    def switch_view(self, normal_vector, width, center, north_vectors):
        self.cam.switch_view(normal_vector, width, center, north_vectors)

    @requires_pf
    def render(self):
        if self.cam.transfer_function is None:
            raise RuntimeError
        sn = self.cam.snapshot()
        return sn

    def isocontours(self, limits, nlayers, width):
        self.cam.transfer_function = ColorTransferFunction(limits)
        self.cam.transfer_function.add_layers(nlayers, w=width)
        

if __name__ == "__main__":
    pass