lsst::afw::math::detail::gpu::BilinearInterp Struct Reference

#include <CudaLanczos.h>

Public Member Functions
	BilinearInterp ()
	difference of neighboring values in the first column (gradient of a line at x=0) More...
	BilinearInterp (SPoint2 par_o, SVec2 par_d0X, SVec2 par_ddX, SVec2 par_deltaY)
LinearInterp	GetLinearInterp (int subY)
	intersects the interpolation surface with a const-y plane More...
SPoint2	Interpolate (int subX, int subY)
	Calculates a value of the interpolation surface at a point (subX,subY) More...

Public Attributes
SPoint2	o
SVec2	d0X
	defines the value at origin More...
SVec2	ddX
	difference of difference of neighboring values in two neighbouring rows (diff. of gradients at x=0 and x=1) More...
SVec2	deltaY

Detailed Description

Used for bilinear interpolation of a 2D function Z*Z -> R*R

This class just defines a 2D surface which can be used to interpolate a segment of a 2D function.

It does not specify which segment of the function is interpolated.

Definition at line 149 of file CudaLanczos.h.

Constructor & Destructor Documentation

lsst::afw::math::detail::gpu::BilinearInterp::BilinearInterp ( )

inline

difference of neighboring values in the first column (gradient of a line at x=0)

Definition at line 157 of file CudaLanczos.h.

: o(0,0), d0X(0,0), ddX(0,0), deltaY(0,0) {};

lsst::afw::math::detail::gpu::BilinearInterp::BilinearInterp ( SPoint2  par_o, SVec2  par_d0X, SVec2  par_ddX, SVec2  par_deltaY  )

inline

Definition at line 159 of file CudaLanczos.h.

        : o(par_o), d0X(par_d0X), ddX(par_ddX), deltaY(par_deltaY) {}

Member Function Documentation

LinearInterp lsst::afw::math::detail::gpu::BilinearInterp::GetLinearInterp ( int  subY )

inline

intersects the interpolation surface with a const-y plane

Definition at line 164 of file CudaLanczos.h.

    {
        SVec2 deltaX=VecAdd(d0X, VecMul(ddX, subY));
        SPoint2 lineBeg= MovePoint(o, VecMul(deltaY,subY) );
        return LinearInterp(lineBeg, deltaX);
    }

SPoint2 lsst::afw::math::detail::gpu::BilinearInterp::Interpolate ( int  subX, int  subY  )

inline

Calculates a value of the interpolation surface at a point (subX,subY)

Definition at line 172 of file CudaLanczos.h.

    {
        LinearInterp lineY=GetLinearInterp(subY);
        return lineY.Interpolate(subX);
    }

Member Data Documentation

SVec2 lsst::afw::math::detail::gpu::BilinearInterp::d0X

defines the value at origin

Definition at line 152 of file CudaLanczos.h.

SVec2 lsst::afw::math::detail::gpu::BilinearInterp::ddX

difference of difference of neighboring values in two neighbouring rows (diff. of gradients at x=0 and x=1)

difference of neighboring values in the first row (the gradient of a line at y=0)

Definition at line 154 of file CudaLanczos.h.

SVec2 lsst::afw::math::detail::gpu::BilinearInterp::deltaY

Definition at line 155 of file CudaLanczos.h.

SPoint2 lsst::afw::math::detail::gpu::BilinearInterp::o

Definition at line 151 of file CudaLanczos.h.

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The documentation for this struct was generated from the following file:

• /home/lsstsw/stack/Linux64/afw/11.0-2-g04d2804/include/lsst/afw/math/detail/CudaLanczos.h