http://www.k-wave.org/forum/topic/adding-elements-in-karray Support for the k-Wave MATLAB toolbox en-US Wed, 13 May 2026 21:21:59 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/adding-elements-in-karray#post-9231 Thu, 04 Sep 2025 20:52:23 +0000 atandri 9231@http://www.k-wave.org/forum/ <p>I am having some trouble creating sensical shapes when rotating kArray 2D elements in a 3D simulation. For example, the addRectElement makes a flat rectangle structure when the angle of rotation is [0,0,0], but with any other angle of rotation, it forms a 3D rectangular prism with + shaped structures on the end when the binary mask is visualized in volumeViewer or similar. I have found this to be the case with other element shapes as well when rotated. Is there a fix for this to obtain the expected rotated structures?</p> <p>Sample code:</p> <p>% =========================================================================<br /> % DEFINE THE K-WAVE GRID<br /> % =========================================================================</p> <p>% set the size of the perfectly matched layer (PML)<br /> PML_X_SIZE = 10; % [grid points]<br /> PML_Y_SIZE = 10; % [grid points]<br /> PML_Z_SIZE = 10; % [grid points]<br /> PML_size = [PML_X_SIZE, PML_Y_SIZE, PML_Z_SIZE];<br /> % set total number of grid points not including the PML<br /> Nx = 256 - 2*PML_X_SIZE; % [grid points]<br /> Ny = 256 - 2*PML_Y_SIZE; % [grid points]<br /> Nz = 256 - 2*PML_Z_SIZE; % [grid points]<br /> grid_size = [Nx, Ny, Nz];</p> <p>% calculate the spacing between the grid points<br /> dx = 2e-4; % [m]<br /> dy = dx; % [m]<br /> dz = dx; % [m]</p> <p>% create the k-space grid<br /> kgrid = kWaveGrid(Nx, dx, Ny, dy, Nz, dz);</p> <p>%% =========================================================================<br /> % DEFINE KARRAY<br /> % =========================================================================<br /> karray = kWaveArray;</p> <p>karray.addRectElement([-6e-3,1.5e-3,0],5e-3, 2e-4, [90, 0, 0]);<br /> source_mask = karray.getArrayBinaryMask(kgrid);</p> <p>slice(single(source_mask), 127,88,118);</p> <p>% =========================================================================<br /> Edit: My apologies, it seems I have submitted this under the wrong forum subject but there is no way to delete. </p>