Location(s) Defined By
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Sets the manner in which the locations on the
surface are defined:
- Enter Data Point —
interactively define a single location on the surface.
- Parameter — using
the U and V Parameter Value settings. The values, which must be in the range
0–1, specify the location from the domain to map to the displayed object.
Within MicroStation, the domain is from 0.0 to 1.0.
- (%) Dist[ance]
Along Curve — using the Dist From U and V Start(%) settings. The values are
each a percentage of the total length of the curve in the u or v direction on
the surface. For example, to extract the tangent direction of a surface at its
middle point, set both Dist. From U and V Start(%) to 50.
- Point Array — using
the Number of U and V Points settings. The values are the number of evenly
spaced locations on the curves in the u and v direction, respectively. For
example, to evaluate at 200 evenly spaced locations on the surface, set Number
of U Points to 10 and Number of V Points to 20.
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Tangent Plot Scale
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Sets the scale factor applied to the magnitude
display. If set to 1.0, the computed tangents will be the true derivative
vector — that is, the tangent direction with the magnitude.
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Normal Plot Scale
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Sets the scale factor applied to the perpendicular
line segments in Normal output. If set to 1.0, the true normal vector is
displayed — that is, the direction plus its true magnitude.
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U/V Parameter Value
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Sets the parameter values applicable to the
Parameter option for defining locations on the surface; see Location(s) Defined
By above.
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Dist[ance] From U/V Start(%)
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Sets the distance values applicable to the Dist.
Along Curve option for defining locations on the surface; see Location(s)
Defined By above.
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Number of U/V Points
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Sets the numeric values applicable to the Point
Array option for defining locations on the surface; see Location(s) Defined By
above.
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[Compute] Points
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If on, the points on the surface at which
evaluation is performed are displayed in the output.
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[Compute] Tangents
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If on, the surface's tangents are computed. In the
context of this tool's operation, a tangent is computed as the partial
derivatives of the surface in both parametric u and v directions.
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[Compute] Normal
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If on, the surface's normal directions are computed.
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