Model.linecreatespline2

Model.linecreatespline2(coordlist, startvector, endvector, endcondition1=9, endcondition2=9)

Creates spline form points and the end vectors.

Parameters:

• coordlist (hwDoubleList) – The list of x, y, z coordinates of the points defining the spline.

• startvector (hwTriple) – The vector defining the start direction of the spline. Only required when endcondition1 is 2, 3, or 4.

• endvector (hwTriple) – The vector defining the end direction of the spline. Only required when endcondition1 is 2, 3, or 4.

• endcondition1 (int) –

  The parameter specifying the constructed spline behavior at curve start. Valid values are:

  0 or 9 - Spline direction at endpoint is not constrained

  1 - Spline is closed. In this case any other end condition is ignored. Closed smooth cubic spline is constructed.

  2 - Spline direction at endpoint is tangent to direction of input vector startvector.

  3 - Spline direction at endpoint is normal to direction of input vector startvector.

  4 - Spline parametric derivative at endpoint equals to input vector startvector. Normalized spline parameterization of 0 to 1 is implied.

• endcondition2 (int) –

  The parameter specifying the constructed spline behavior at curve end. Valid values are:

  0 or 9 - Spline direction at endpoint is not constrained

  1 - Spline is closed. In this case any other end condition is ignored. Closed smooth cubic spline is constructed.

  2 - Spline direction at endpoint is tangent to direction of input vector endvector.

  3 - Spline direction at endpoint is normal to direction of input vector endvector.

  4 - Spline parametric derivative at endpoint equals to input vector endvector. Normalized spline parameterization of 0 to 1 is implied.

Example

Create a spline using locations (-1.3 -0.1 0.0). (-0.7 0.1 0.0), (-0.5 -0.2 0.0), (0.2 -0.9 0.0), (0.7 -0.5 0.0), (0.9 -0.4 0.0), direction at the start defined by vector (-1.0, 0.2, 0.0), and unconstrained direction at the end

import hm
import hm.entities as ent

model = hm.Model()

model.linecreatespline2(
    coordlist=[-1.3, -0.1, 0.0, -0.7, 0.1, 0.0, -0.5, -0.2, 0.0, 0.2, -0.9, 0.0, 0.7, -0.5, 0.0, 0.9, -0.4, 0.0],
    startvector=[-1.0, 0.2, 0.0],
    endvector=[0.0, 0.0, 0.0],
    endcondition1=2,
    endcondition2=9
)