docstr: Test the ray function using random 2d points.
docstr_tok: ["Test","the","ray","function","using","random","2d","points","."]
code: def test_ray_random(self):
      """Test the ray function using random 2d points."""
      point_2d = np.random.uniform(size=(100, 2))
  
      pred = orthographic.ray(point_2d)
      gt = np.tile((0.0, 0.0, 1.0), (100, 1))
  
      self.assertAllEqual(pred, gt)
  
file_path: graphics/tensorflow_graphics/rendering/camera/tests/orthographic_test.py
imports: from absl.testing import parameterized
  import numpy
  from tensorflow_graphics.rendering.camera import orthographic
  from tensorflow_graphics.util import test_case
label_desc: Use image node_id 8 for calling the OrthographicTest obj's underlying member method code with example usage: obj.test_ray_random() without return types