Solid Working Area Accuracy InformationVersion: 08.00.01.19Product: MicroStation V8Area: Parasolid,
Information:The solid modeling kernels require coordinate data at a fixed precision.In order to guarantee enough precision is available, MicroStationdefines the solids working area (SWA). The SWA is effectively a designcube centered around the center of design. The length of the cube'sedges can be found under
- V8i: Settings > Design File > Working Units >Advanced > Working Areas > Solids,
- CONNECT Edition: Settings > File > Design File Settings > Working Units > Advanced Settings > Edit > Working Areas > Solids.The purpose of the SWA value is to reduce the working volume to a moremanageable size when working with solids. This also increases theaccuracy for solids. Maximum accuracy for solids can be achieved bysetting the Resolution to 1,000,000 per Meter and setting Solids to 1Kilometer.How much accuracy is required depends more on the size of the smallestdetail (blend , etc.) rather than the size of the solid itself. Becauseof this, it is difficult to give a definitive answer and also depends onthe types of operations that are planned on being done and on whattypes of geometry.Less accuracy is required for Boolean operations on orthonginal (square)elements vs. dealing with a lot of complex blends on B-Spline surfaces.The precision needs to at least cover the smallest detail, but somecalculations.Conclusion:The Solids Working Area can be changed, and there is a lot offlexibility there, but the optimal setting is when the SWA is 1 km (tomatch the ParaSolids modeling kernel accuracy).
Notes:Changing the SWA value does not change the Resolution, that is the sizeof elements in the file will not be changed.It is operations in ParaSolid may require more precision for the internalpossible to move ParaSolid elements out of the SWA, but theywill not be able to be modified until returning with the SWA.The SWA is centered about the center of the design area, not the globalorigin.
Not applicable to V8i based products