Module name: lofted_sur

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Module declaration: GLOBAL GEOMETRY MODULE lofted_sur

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Module description:

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SUR_CONIC sample

Start with as few limit/tangent curves as possible. Add curves and/or

segments only as required to get the required shape and quality of the

surface

Use CUR_CONIC curves as limit and tangent curves.

The CUR_SPLINE curve type easily oscillates. The spline curves

need many, very well defined points in order to get a high

quality curve. Such well-defined points cannot be defined

manually (inteactively). Spline smoothing functions are

needed in order to be able to use splines as input to

surfaces.

Generally favor use of P-value curves instead of

midpoint curves to control the surface, since they are easier to alter when

the shape and quality of the surface requires adjustment.

It is recommended that the surface is defined in millimeters

and the geometry calculation tolerances are trimmed for objects

that are about a meter or two meters, i.e. point coordinates

around 1000.0.

2006-03-02 John Hughes and Gunnar Liden

Initializations and check of input data

Generate local coord. systems in the GLOBAL (inherited) coord. system

for the definition of section curves and the spine

Create the spine curve. It is a straight line but sur_conic does

not (yet) accept this type as input.

Create the points that will be used for the definition of the limit curves.

Create the section curves Near-stern, Mid-ship and Near-bow

Define tangent definition points for the limit curves

Create limit curves and tangent curves for the lofted surface

The type of curve used for these curves are cur_conic curves

Define P-curve. The curve must be defined in the BASIC coordinate system

Define the lofted surface

Module parameters:

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INT graphic:=1 > "Graphic 0: Nothing 1: Surface 2: All");

No called modules

This document was created 2006-03-11 by module m_extdoc1