33 lines
1.3 KiB
Matlab
33 lines
1.3 KiB
Matlab
function [Transf] = setupSpace(~,Params)
|
|
Transf.Xmax = 0.5*Params.Lx;
|
|
Transf.Ymax = 0.5*Params.Ly;
|
|
|
|
Nx = Params.Nx;
|
|
Ny = Params.Ny;
|
|
|
|
% Fourier grids
|
|
x = linspace(-0.5*Params.Lx,0.5*Params.Lx-Params.Lx/Params.Nx,Params.Nx);
|
|
Kmax = pi*Params.Nx/Params.Lx;
|
|
kx = linspace(-Kmax,Kmax,Nx+1);
|
|
kx = kx(1:end-1);
|
|
dkx = kx(2)-kx(1);
|
|
kx = fftshift(kx);
|
|
|
|
y = linspace(-0.5*Params.Ly,0.5*Params.Ly-Params.Ly/Params.Ny,Params.Ny);
|
|
Kmax = pi*Params.Ny/Params.Ly;
|
|
ky = linspace(-Kmax,Kmax,Ny+1);
|
|
ky = ky(1:end-1);
|
|
dky = ky(2)-ky(1);
|
|
ky = fftshift(ky);
|
|
|
|
[Transf.X,Transf.Y] = ndgrid(x,y);
|
|
[Transf.KX,Transf.KY] = ndgrid(kx,ky);
|
|
Transf.x = x;
|
|
Transf.y = y;
|
|
Transf.kx = kx;
|
|
Transf.ky = ky;
|
|
Transf.dx = x(2)-x(1);
|
|
Transf.dy = y(2)-y(1);
|
|
Transf.dkx = dkx;
|
|
Transf.dky = dky;
|
|
end |