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PolyCAD

Name and Colour

Specifies the option text identifier and color of the entity.

Name The optional text identifier of the entity
Colour The colour of the entity. Clicking in the colored square will display the colour selection dialogue box.

Definition Curves

The definition group is used to select the curves that are used to define the hull surface. Additional curves can be added to the hull surface using the Add Selected drop down menu and curves can be deleted using the button.

Parameters

The parameters group is displays the characteristics of the surface and can be edited, invoking a transformation changing the hull shape.

Draught The draught for associated hydrostatic calulcations and the height where the bulb surface meets the fore perpendicular.
LOA The extreme length of the hull surface.
DWL The design waterline length at the specified Draught.
LBP The length between perpendicular. The aft perpendicular is located at the origin (0.0, 0.0, 0.0).
BWL The breadth of the hull at the waterline.
D The depth of the hull surface.
DISP The displacement of the hull surface.
CB The Block Coefficient
CP The Prismatic Coefficient
LCB Longitudinal Centre of Buoyancy
PDF The forward location of the parallel deck.
PDA The aft location of the parallel deck. This parameter is hidden if the transom breadth is equal to the maximum breadth of the hull.
PD The longitudinal extent of the parallel deck.
PMBF The forward location of the parallel middle body.
PMBA The aft location of the parallel middle body.
PMB The longitudinal extent of the parallel middle body.
VolumeF% Parameter controlling the volumetric fullness in the hull, forward of the parallel middle body. The value varies from 0% to 100%.
VolumeA% Parameter controlling the volumetric fullness in the hull, aft of the parallel middle body. The value varies from 0% to 100%.
TangentF% The strength of the hull surface tangent along the forward extent of parallel middle body.
TangentA% The strength of the hull surface tangent along the aft extent of parallel middle body.
   

Bulb Parameters

The bulb parameters control the size of the bulb appendage and if it will be applied to the hull surface.

Apply Bulb When checked, applies the the bulb surface to the main hull surface.
Update Surface Updates the hull surface after any of the bulb surface parameters are changed.

View Options

The view options control how the hull surface is displayed.

View Construction Curves Displayes all the control curves used to generate the hull surface including both the user and computer generated definitions.
View Blends Displays the blend curves that are generated between the definition curves and are used to loft control polygon rows of the hull surface.
View Bulb Surface Displayes the surface representation of the bulb surface which is combine with the main hull surface to produce the appendage.
View Surface Displays the surface parameters.
View Contours Displays the surface contours.