Enums.ExtrusionMode enumeration

The ExtrusionMode can be one of:

Constant	Description
`Enums.ExtrusionModeNone`	`(0)` No extrusion.
`Enums.ExtrusionModeMinimum`	`(1)` A z-value is calculated by adding the extrusion height to the minimum z-value of the feature, and the feature is extruded to a flat top at that value.
`Enums.ExtrusionModeMaximum`	`(2)` A z-value is calculated by adding the extrusion height to the maximum z-value of the feature, and the feature is extruded to a flat top at that value.
`Enums.ExtrusionModeAbsoluteHeight`	`(3)` The feature is extruded to the specified z-value as a flat top, regardless of the z-values of the feature.
`Enums.ExtrusionModeBaseHeight`	`(4)` A z-value is calculated for each vertex of the feature's base, and the feature is extruded to the various z-values. This is the only extrusion mode that doesn't have a flat top.