k-Wave User Forum » Topic: Circles in 3-D

k-Wave User Forum » Topic: Circles in 3-D http://www.k-wave.org/forum/topic/circles-in-3-d Support for the k-Wave MATLAB toolbox en-US Wed, 13 May 2026 12:43:25 +0000 http://bbpress.org/?v=1.0.2 <![CDATA[Search]]> q http://www.k-wave.org/forum/search.php Bradley Treeby on "Circles in 3-D" http://www.k-wave.org/forum/topic/circles-in-3-d#post-5800 Wed, 04 Jan 2017 14:14:19 +0000 Bradley Treeby 5800@http://www.k-wave.org/forum/ Hi johnhop, One option is to create both of the circles in 2D using <code>makeCartCircle</code>. Next, create two separate 2D <code>kgrid</code> objects with the correct dimensions (one Nx/Ny, one Nx/Nz). Then convert both Cartesian circles to binary matrices using <code>cart2grid</code>. Finally, you can place these 2D matrices into a larger 3D matrix in the correct plane and orientation. Another option is to use <code>makeCartCircle</code> to create both of the circles, create a new matrix with three rows and the total number of points, and then copy the rows to x/y or x/z as appropriate. Hope that helps, Brad. johnhop on "Circles in 3-D" http://www.k-wave.org/forum/topic/circles-in-3-d#post-5791 Wed, 21 Dec 2016 22:49:05 +0000 johnhop 5791@http://www.k-wave.org/forum/ Hello. I am fairly new to MATLAB and I am stuck at creating 2 circles with blanks in between the dots(dots will be sensor points): one in x-y and the other in x-z. For x-y I know I can use makeCartCircle. However I cannot come up with anything for the x-z one. x-y circle: 5 -> radius 40 -> number of points [0, 0, 0] -> center point 2*pi -> arc angle x-z circle: 5 -> radius 40 -> number of points [0, 0, 0] -> center point -pi/2, pi/2 -> arc angle Follow-up question: Would there be any problems with working this cartesian result into kgrid? Thank you in advance.