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import torch
from torch_geometric.data import Data
from torch_geometric.transforms import SamplePoints
def test_sample_points():
assert str(SamplePoints(1024)) == 'SamplePoints(1024)'
pos = torch.tensor([
[0.0, 0.0, 0.0],
[1.0, 0.0, 0.0],
[0.0, 1.0, 0.0],
[1.0, 1.0, 0.0],
])
face = torch.tensor([[0, 1], [1, 2], [2, 3]])
data = Data(pos=pos)
data.face = face
data = SamplePoints(8)(data)
assert len(data) == 1
assert pos[:, 0].min() >= 0 and pos[:, 0].max() <= 1
assert pos[:, 1].min() >= 0 and pos[:, 1].max() <= 1
assert pos[:, 2].abs().sum() == 0
data = Data(pos=pos)
data.face = face
data = SamplePoints(8, include_normals=True)(data)
assert len(data) == 2
assert data.normal[:, :2].abs().sum() == 0
assert data.normal[:, 2].abs().sum() == 8
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