| Class Summary | 
| ConstantWeight | Constant Weight function
 
 The result is always 1.0 | 
| ErfcStddevWeight | Gaussian Error Function Weight function, scaled using stddev. | 
| ErfcWeight | Gaussian Error Function Weight function, scaled such that the result it 0.1
 at distance == max
 
 erfc(1.1630871536766736 * distance / max)
 
 The value of 1.1630871536766736 is erfcinv(0.1), to achieve the intended
 scaling. | 
| ExponentialStddevWeight | Exponential Weight function, scaled such that the result it 0.1 at distance
 == max
 
 stddev * exp(-.5 * distance/stddev)
 
 This is similar to the Gaussian weight function, except distance/stddev is
 not squared. | 
| ExponentialWeight | Exponential Weight function, scaled such that the result it 0.1 at distance
 == max
 
 exp(-2.3025850929940455 * distance/max)
 
 This is similar to the Gaussian weight function, except distance/max is not
 squared | 
| GaussStddevWeight | Gaussian Weight function, scaled such using standard deviation
 
 factor * exp(-.5 * (distance/stddev)^2)
 
 with factor being 1 / sqrt(2 * PI) | 
| GaussWeight | Gaussian Weight function, scaled such that the result it 0.1 at distance ==
 max
 
 exp(-2.3025850929940455 * (distance/max)^2) | 
| InverseLinearWeight | Inverse Linear Weight Function. | 
| InverseProportionalStddevWeight | Inverse proportional weight function, scaled using the standard deviation.
 
 1 / (1 + distance/stddev) | 
| InverseProportionalWeight | Inverse proportional weight function, scaled using the maximum.
 
 1 / (1 + distance/max) | 
| LinearWeight | Linear weight function, scaled using the maximum such that it goes from 1.0
 to 0.1
 
 1 - 0.9 * (distance/max) | 
| QuadraticStddevWeight | Quadratic weight function, scaled using the standard deviation. | 
| QuadraticWeight | Quadratic weight function, scaled using the maximum to reach 0.1 at that
 point.
 
 1.0 - 0.9 * (distance/max)^2 |