% Compare the solar pressure force for uniform and irregular materials.
 Demonstrate optical properties which vary across the sail membrane, and
 compare to a uniform sail surface. The sail is in the X/Y plane and the
 sun incidence angle is in the X/Z plane.

 Try running it for both flat and billowed shapes by changing the state of
 the sailIsFlat flag. There will be no torque on the uniform flat sail but
 substantial torques on the irregular flat sail even for zero incidence
 angle, due to the change in the center of pressure. The y torque on the
 billowed sail will be dominated by the sail shape but the x and z torques
 will be similar.

 This demo uses the default random number generator so you will get the same
 irregular optical properties over multiple runs.
  See also: SailMesh, CP1Props, SolarPressureForce


Common: Graphics/Figui
Common: Graphics/NewFig
Common: Graphics/Plot2D
Common: Graphics/PolygonProps
Math: Linear/Cross
Math: Linear/Dot
Math: Linear/Mag
Math: Linear/Unit
SC: Environs/SolarFlx
Sail: Disturbances/SolarPressureForce
Sail: Graphics/DrawSailMeshVectors
Sail: SailModeling/CP1Props
Sail: SailModeling/SailMesh