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Tag Archives: c++

Line filter for opencamlib

Monday, July 5, 2010

When generating toolpaths with drop-cutter ("axial tool-projection", if you like fancy words) the path ends up being composed of lots of short linear segments. It makes sense to filter this list of points and take out any middle points that lie on a straight line between neighboring points. Here's a first attempt at such a [...]

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Matrix determinant with Boost::uBLAS

Tuesday, May 25, 2010

Boost uBLAS provides BLAS functionality, but doesn't have a function for computing the determinant of a matrix. Googling for this turns up a few code snippets, but it's best to document this completely here now since I got it to work, and it will be useful for opencamlib sooner or later. 1 2 3 4 [...]

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Composite cutters for ocl

Sunday, May 2, 2010

People who, unlike me, actually know something about programming often talk about design patterns. One common idea is to compose objects out of other objects. I was able to add four new APT-tool like cutter classes to ocl with about 5-lines of code for each cutter (sans the bugfixing, taking much longer, that also took [...]

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Drop-cutter again

Friday, March 5, 2010

This is about my third rewrite of this fairly simple cam-algorithm where the cutter is dropped from above until it touches a triangle. It's now in C++ with Boost-python bindings and with visualization using vtk. The cutter-location points are calculated by bringing the cutter into contact with the vertices of the triangle (green cl-points), the [...]

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OpenMP test on i7

Saturday, November 14, 2009

Here's a simple piece of c-code (try zipped version) for testing how to parallelize code with OpenMP. It compiles with gcc -fopenmp -lm otest.c The CPU-load while running looks like this: Looks like two logical CPUs never get used (two low lines beyond "5" in the chart). It outputs some timing information: running with 1 threads: [...]

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More pystones with shedskin

Monday, June 23, 2008

As I'm very much an amateur programmer with not too much time to learn new stuff I've decided my CAM-algorithms are going to be written in Python (don't hold your breath, they'll be online when they'll be online...). The benefits of rapid development will more than outweigh the performance issues of Python at this stage. [...]

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