ccBendConnector

ccBendConnector(
l_port
n_radius
n_bangle 
n_rmin
n_gamma
) 
=> l_connector / nil

Description

(Virtuoso Photonics Option) Creates a bend connector making a circular turn from the specified starting port with the radius, bend angle, and gamma fraction given in ccWaypointConnector. The connector consists of a central circular arc and two apex clothoids matching its curvature at one end and with zero curvature at the other end. Gamma is the ratio of the circular bend angle to the total bend angle.

If the bend radius is specified as 0, the bend connector is created with the radius at the interface between the clothoids and the central circular arc equal to rmin. If you set gamma to 1-(cangle/bangle) bend connectors are created containing fixed clothoid sections with angle varying from 0 to cangle and radius varying from 0 to rmin.

Constraints

0 < |bangle| < 2*PI
0 <= gamma <= 1
gamma = 0 or gamma = 1 when bangle > PI

Arguments

l_port	`list(nil 'xy` l_point `'facet` l_facet`) \| nil` The starting port. where, l_point `list(`n_x n_y`)`A list of two-dimensional point represented by n_x and n_y. l_facet `list(nil 'angle` n_angle `['radius` n_radius`] ['width` n_width`]`A facet is specified by the angle n_angle. Values for n_radius and n_width are not required and are ignored if specified.
n_radius	Radius of the turn made by the bend.
n_bangle	Angle of the turn made by the bend. Valid values: Greater than `0` and less than the product of `2` and `Pi`.
n_rmin	Minimum allowed curvature radius.
n_gamma	A numeric value between `0` and `1` indicating the ratio of the circular bending angle to the overall bending angle. When the value is `1`, the connector consists of a single circular arc. When the value is `0`, the connector consists of two clothoids.

Value Returned

l_connector

list(nil 'connector o_polyCurve 'message t_message)

The resulting connector (ccPolyCurve ID) bundled with debug or error information.

where,

o_polyCurve specifies the resulting ccPolyCurve connector. If o_polyCurve = nil, the connector cannot be implemented.
t_message is a string holding the debug information or an error message describing the reason why the connector calculation was not successfully completed.

nil

An error occurred, the connector cannot be implemented.

Example

port = '(nil xy (3000  250) facet (nil angle 20))

radius = 100

bangle = -300

rmin = 0.1

gamma = 1

ccBendConnector(port radius bangle rmin gamma)

=> (nil connector cc@0x293deeb9 message "Length=523.598776 MinRadius=100.000000")

Virtuoso Studio Design Environment SKILL Reference
Product Version IC23.1, November 2023