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Action:
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Sets the start angle of a circular curve or edge or an elliptical curve or edge.
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Filename:
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cstr/cstr_scm/geom_scm.cxx
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APIs:
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api_get_ellipse_parameters, api_modify_ellipse
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Syntax:
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(arc:set-start curve angle)
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Arg Types:
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curve
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elliptical-curve | elliptical-edge
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angle
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real
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Returns:
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elliptical-curve | elliptical-edge
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Description:
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Circular curves and edges are subsets of elliptical curves and edges. This extension extends or shortens the input
curve curve to the given
angle angle along the curve. The start position is determined using the right hand rule with respect to the curve's normal, the end position, and the desired angle.
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curve specifies an elliptical curve or edge.
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angle specifies the new start angle of the ellipse in degrees.
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Example:
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; arc:set-start
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; Create a circular edge.
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(define arc1
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(edge:circular
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(position 15 25 0) 25 0 185))
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;; arc1
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; OUTPUT Original
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; Set the start angle of the edge.
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(define set (arc:set-start arc1 45))
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;; set
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; OUTPUT Result
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Figure 2-7. arc:set-start
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