RGEllipseSetParameters#

Sets the parameters defining the ellipse region.

Synopsis#

#include "slepcrg.h" 
PetscErrorCode RGEllipseSetParameters(RG rg,PetscScalar center,PetscReal radius,PetscReal vscale)

Logically Collective

Input Parameters#

  • rg - the region context

  • center - center of the ellipse

  • radius - radius of the ellipse

  • vscale - vertical scale of the ellipse

Options Database Keys#

  • -rg_ellipse_center - Sets the center

  • -rg_ellipse_radius - Sets the radius

  • -rg_ellipse_vscale - Sets the vertical scale

Notes#

In the case of complex scalars, a complex center can be provided in the command line with [+/-][realnumber][+/-]realnumberi with no spaces, e.g., -rg_ellipse_center 1.0+2.0i.

When PETSc is built with real scalars, the center is restricted to a real value.

For radius and vscale, you can use PETSC_CURRENT to keep the current value, and PETSC_DETERMINE to set them to a default of 1.

See Also#

RG: Region, RGELLIPSE, RGEllipseGetParameters()

Level#

advanced

Location#

src/sys/classes/rg/impls/ellipse/rgellipse.c

Implementations#

RGEllipseSetParameters_Ellipse() in src/sys/classes/rg/impls/ellipse/rgellipse.c

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