Rank: 1257 based on 116 downloads (last 30 days) and 3 files submitted
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Johannes Korsawe

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I am a mathematician at the Volkswagen AG and working with MATLAB since ~1998.

Professional Interests:
fem, geometrical computations

 

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Files Posted by Johannes View all
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(last 30 days)
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06 Jan 2014 Screenshot intriangulation - which points are inside a 3d watertight triangulation? Are 3D-testpoints located inside or outside an arbitrary watertight mesh with vertices and faces? Author: Johannes Korsawe inside, 3d, point, mesh, volume, watertight 33 10
  • 5.0
5.0 | 1 rating
27 Jan 2012 Screenshot circlefit3d - fit circle to three points in 3d space Calculate center, radius and plane of circle that passes through three given points Author: Johannes Korsawe circle, points, fit, interpolation, 3d, linear algebra 55 2
  • 5.0
5.0 | 2 ratings
09 Jan 2008 Screenshot Minimal Bounding Box Minimal bounding box around points in the (x,y,z) space Author: Johannes Korsawe bounding, box, cuboid, minimum, surface 28 3
  • 4.85714
4.9 | 7 ratings
Comments and Ratings by Johannes View all
Updated File Comments Rating
03 Jun 2014 scatterquad2 calculates the volume under a surface defined by scattered points Author: Ben Petschel

Works as addressed. Very nice!

20 May 2014 Particle System Toolbox Graphically simulate the interactions of particles, springs, and attractions in a particle system. Author: Joerg Buchholz

That is some nice piece of code.

Could be extended to application of external forces? (or is this possible by now?)

07 Mar 2014 grep: a pedestrian, very fast grep utility a unix-like, very fast grep utility to find strings(s) in files of any type Author: us

This should be included in regular MATLAB releases.
It is the rescue boat if you are forced to work with Windows.

06 Jan 2014 intriangulation - which points are inside a 3d watertight triangulation? Are 3D-testpoints located inside or outside an arbitrary watertight mesh with vertices and faces? Author: Johannes Korsawe

Hi yusuf,
you are right, you can easily extend the program or make a check prior to intriangulation to give results for this case as a quick help.
I will fix this as soon as i come to time.

31 Oct 2013 intriangulation - which points are inside a 3d watertight triangulation? Are 3D-testpoints located inside or outside an arbitrary watertight mesh with vertices and faces? Author: Johannes Korsawe

Acceleration is done but without domain decomposition methods as of Sven's submission, which i currently have no time to do.

The main advantage of intriangulation is the fact i do not need any orientation of the triangles which can be a significant (one-time) effort to do at least with my realworld examples.

Comments and Ratings on Johannes' Files View all
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17 Jun 2014 intriangulation - which points are inside a 3d watertight triangulation? Are 3D-testpoints located inside or outside an arbitrary watertight mesh with vertices and faces? Author: Johannes Korsawe yusuf

Hi Johannes,

Thank you for your interest.

Could you rearrange the code to give the points exactly on the facets and on the vertex of the facet.

11 Jun 2014 Minimal Bounding Box Minimal bounding box around points in the (x,y,z) space Author: Johannes Korsawe Wolfgang

21 Mar 2014 circlefit3d - fit circle to three points in 3d space Calculate center, radius and plane of circle that passes through three given points Author: Johannes Korsawe Fernando

Thanks!!! very helpful

18 Jan 2014 Minimal Bounding Box Minimal bounding box around points in the (x,y,z) space Author: Johannes Korsawe redha, fourar

17 Jan 2014 Minimal Bounding Box Minimal bounding box around points in the (x,y,z) space Author: Johannes Korsawe Matt Kindig

A simple fix to reduce the run-time is to replace the line:

rot_i = Rmat(-edgeangles(i));

with these lines:
theta = -edgeangles(i);
rot_i = [cos(theta), sin(theta); -sin(theta) cos(theta)];

In my testing, this reduces the run-time by a factor of ~2.

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