slepc-3.18.2 2023-01-26
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# RGEllipseSetParameters

Sets the parameters defining the ellipse region.

### Synopsis

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

Logically Collective on rg

### 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.

### See Also

RGEllipseGetParameters()

### Level

advanced

### Location

src/sys/classes/rg/impls/ellipse/rgellipse.c
Index of all RG routines
Table of Contents for all manual pages
Index of all manual pages