Loft
Loft
GstarCAD 2021 → User Guide → Additional Pages
Menu: Draw>Modeling>Loft
Ribbon: 3D>Extrude>
Command Entry: Loft
To build solid 3D models, use the limited typical section. Loft includes three methods: Guides, Path and Cross Sections.
Guides: Specified guide curves will be added to the boundary, when solid models are generated. Guide curves will directly affect the shape of solid outlines, as shown in the following drawing.
Path: There is only one path. Path will directly affect the generating method of the solid section. The following picture shows the contrasting effect between specifying a line as path and specifying curves as path.
Cross Section: If the cross section option is selected, the settings dialogue box will appear as shown below.
Ruled: Specifies that the solid or surface is ruled (straight) between the cross sections and has sharp edges at the cross sections.
Smooth Fit: Specifies that a smooth solid or surface is drawn between the cross sections and has sharp edges at the start and end cross sections.
Normal To: Controls the normal surface of the solid or surface at the point where it passes through the cross sections.
Draft Angles: Controls the draft angle and magnitude of the first and last cross section of the lofted solid or surface. The draft angle is the beginning of the direction of the surface. 0 is defined as outward from the plane of the curve.
Start Angle: Specifies the draft angle for the start cross section.
Start Magnitude: Controls the relative distance of the surface from the start cross section towards the direction of the draft angle before the surface starts to bend toward the next cross section.
End Angle: Specifies the draft angle for the end cross section.
End Magnitude: Controls the relative distance of the surface from the end cross section towards the direction of the draft angle before the surface starts to bend toward the previous cross section.
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