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: BUILD : Set:Build ParametersShortcut
: NoneThe build parameters control some details of the building process. The build parameters affect the entire surface. They may not be given to separate section curves.
When this command is executed, a parameter box appears containing all of the options as follows:
When drawing the initial cross-section curves it is often convenient to draw the curve in a certain orientation of your choosing. When the surface is created, this cross-section orientation may not be satisfactory. Rather than returning to the cross-section and rotating them to new positions, these options can be chosen.
These parameters do not change the original section curves, they just define how they are used for building.
If the primary projection has been defined with two curves, and the secondary projection with one or none, the scaling of the section curves is only specifically controlled in one direction.
If the option of scaling in both directions (the default) is chosen then DeskArtes will make the scaling in both the primary and secondary projections equal.
If the option of scaling in one direction is chosen then the cross-section curves will not be scaled in the direction of the secondary projections. In this case, the size of the cross-sections is important. For example, if only one section curve has been defined, scaling in one direction produces a surface of constant width. This is demonstrated below where a handle has been designed with two primary projection curves. Because the distance between these curves varies so does the width of the handle. Setting this option to scaling in one direction produces a handle of constant width.
The section curves are normally positioned on the projection curves at the center point of the section curve. The center point is calculated by DeskArtes as the center of the section's bounding box. This means it does not matter where the sections are drawn. The resulting surface will always be the same.
However, sometimes you may need to attach the sections to the projections at a specific point. In this case, choose the option for placement at the fixpoint. For example, if you have defined just one projection curve, and wish a certain point of the section curve to follow the projection exactly, design the section curve so that the fixpoint is positioned at the location n question.
In the example below the fixpoint of the section is set at one corner. With the curve center option chosen the section is attached to the projection curve at the triangle center. With the fixpoint option the section is attached at the corner of the triangle.
With this option, when you next execute the build command DeskArtes will scale the section curves to the actual size they appear on the surface. This has no effect on single section building since no scaling takes place during the build process.