def test_regular_sampler(self):
sam = RegularSampler(2, 2, 1.0, 1)
sam.create_shader()
sam.prepare_standalone()
sample = sam.generate_sample()
self._check_result(sample, -0.5, -0.5, 0.5, 0.5, 0, 0, 1)
sample = sam.generate_sample()
self._check_result(sample, 0.5, -0.5, 0.5, 0.5, 1, 0, 1)
sample = sam.generate_sample()
self._check_result(sample, -0.5, 0.5, 0.5, 0.5, 0, 1, 1)
sample = sam.generate_sample()
self._check_result(sample, 0.5, 0.5, 0.5, 0.5, 1, 1, 1)
sample = sam.generate_sample()
self.assertFalse(sample)
