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105 lines
3.1 KiB
Plaintext
105 lines
3.1 KiB
Plaintext
/*!
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\page create_curve_page Curve
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To create a \b Curve in the <b>Main Menu</b> select <b>New Entity - >
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Basic - > Curve</b>
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There are three <b>Curve Construction</b> menu choices corresponding to three
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possible types of curves: Polyline, Besier or B-spline (Interpolated).
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The curve is defined by a list of \b Points through which it passes.
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\n There are two ways to define these <b>Points</b>:
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<ul>
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<li> <b>By Selection</b> manual picking of the points in the Object Browser or 3D Viewer.
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<li> <b>Analytical</b> parametric definition of the points through
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python expressions.
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</ul>
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\n The \b Result of each operation will be a GEOM_Object (edge).
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<b>Polyline</b>
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\image html polyline.png
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Polyline or polygonal chain is a connected series of line segments. It
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can be defined by the following parameters:
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\image html curve2.png
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<ul>
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<li><b>Points</b> at least 2 points which will serve as nodes on the curve.</li>
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<li><b>Build a closed wire</b> checkbox allows creating the curve as
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closed wire.</li>
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</ul>
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\n <b>TUI Command:</b> <em>geompy.MakePolyline(ListOfShapes,isClosed)</em>
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<b>Bezier</b>
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\image html bezier.png
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Bezier curve is a curve completely contained in a convex hull of its
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control points. It can be defined by the following parameters:
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\image html curve3.png
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<ul>
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<li><b>Points</b> at least 2 points used to approximate the curve.</li>
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<li><b>Build a closed edge</b> checkbox allows creating the curve as
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closed edge.</li>
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</ul>
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\n <b>TUI Command:</b> <em>geompy.MakeBezier(ListOfShapes,isClosed)</em>
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<b>B-spline</b>
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\image html interpol.png
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B-spline is a union of curve segments defined at each node span. It
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can be defined by the following parameters:
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\image html curve4.png
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<ul>
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<li><b>Points</b> at least 2 points which will serve as nodes on the curve.</li>
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<li><b>Build a closed edge</b> checkbox allows creating the curve as
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closed edge.</li>
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<li> If <b>Reorder vertices taking into account distances</b> is
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checked, the interpolation algorithm does not follow the order of
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vertices but searches for the closest vertex.</li>
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<li><b>Tangents</b> are two vectors, defining the direction at the ends of the
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curve. It is necessary to set both vectors or none. This option is available only
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if both above check boxes are not checked.
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</li>
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</ul>
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\n <b>TUI Command:</b>
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<br><em>geompy.MakeInterpol(ListOfShapes,isClosed,doReordering)</em>
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<br><em>geompy.MakeInterpolWithTangents(ListOfShapes,Vector1,Vector2)</em>
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<b>Analytical Definition</b>
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The input parameters for analytical definition are common for all
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types of curves.
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\image html curve1.png
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<ul>
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<li><b>X(t)equation, Y(t)equation, Z(t)equation</b> are python
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expressions for X, Y and Z coordinates of the basic points of the curve.</li>
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<li><b>Min t, Max t</b> are minimum and maximum values of the parameter \b t.</li>
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<li><b>Step</b> is the number of steps of the parameter \b t.</li>
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</ul>
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\n <b>TUI Command:</b> <em>geompy.MakeCurveParametric(XExpr, YExpt, ZExpt, tMin, tMax, nbSteps, curveType, True)</em>
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\n<b>Advanced options</b> \ref preview_anchor "Preview"
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Our <b>TUI Scripts</b> provide you with useful examples of creation of
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\ref tui_creation_curve "Basic Geometric Objects".
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*/
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