Create a scalar field whose value at each point is a spherical isovist statistic.

Input parameters:

1. Pl → Sampling orientation. For a hemisphere the plane normal is the up axis and the plane is the horizon.
2. Cn → Number of sample rays per isovist. Lower values evaluate faster when the field is sampled densely.
3. Rd → Sample radius.
4. Ob → Obstacles to sample against (curves, planes, surfaces, breps and meshes are supported).
5. Dm → Whether to sample the upper hemisphere or the full sphere of directions.
   • 0 → Hemisphere
   • 1 → Sphere
6. Mt → Scalar metric reported at each query point.
   •  0 → Hit Count
   •  1 → Hit Fraction
   •  2 → Coverage
   •  3 → Block Sum
   •  4 → Block Norm
   •  5 → Ramp Sum
   •  6 → Ramp Norm
   •  7 → Decay Sum
   •  8 → Decay Norm
   •  9 → Smooth Sum
   • 10 → Smooth Norm
   • 11 → Average
   • 12 → Exposure
   • 13 → Drift
   • 14 → Anisotropy
7. Tr → Transition distance where the falloff begins. Ignored unless the metric is LinearRamp, Exponential or Smoothstep (or their normalised variants).

Output parameters:

1. Fl → Scalar field of the selected isovist metric at each point.