AutoCAD
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I've been threatening to implement this for a few posts, now, so I decided it was finally time for me to put my money where my mouth is. 🙂 This post extends the series I've been writing on turtle graphics (here's the most recent part, from which you'll find links to its predecessors). This series […]
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What, yet another part? The series that just goes on and on... 🙂 To catch up, here are parts 1, 2, 3, 4 and 5, and the original post. This post looks at more organic forms, once again, but this time in 3D. I had lots of fun with this one: I took the principle […]
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The first update to AutoCAD 2009 is now available. Here is the Readme for this update, which includes a note that these developer-oriented fixes are included (as well as many more general issues): .NET API When a .NET function with a LispFunction attribute has the return type as object, an exception is thrown in AutoCAD. […]
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Once again I've ended up extending this series in a way I didn't originally expect to (and yes, that's a good thing :-). Here are parts 1, 2, 3 and 4, as well as the post that started it all. After thinking about my initial 3D implementation in Part 4, I realised that implementing pen […]
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I just couldn't resist coming back to this fun (at least for me 🙂 series... for reference here are parts 1, 2 and 3, while the series really started here. There are two main places I wanted to take this implementation: firstly it really needed to be made 3D, which is the focus of this […]
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This question came in by email last week: The last two days I am struggling with adding a new LayerGroup to HostApplicationServices.WorkingDatabase.LayerFilters.Root. I simply cannot get it working. Is it possible to write a blog item with example on this? An interesting question and it can indeed be quite tricky to understand how this works. […]
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This post demonstrates a simple check for whether a drawing is two or three dimensional. The code is almost embarrassingly simple, but then the question is significant and in the absence of a "Is3D" property on the Database object this is likely to prove useful for people. So how do we check whether a drawing […]
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Everything aches after a very enjoyable soccer tournament in Prague (to which I mentioned I was heading off in my last post). But it was well worth the pain; it was really a lot of fun playing with and against (and just catching up with) so many friends and colleagues. I received this question a […]
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This post was inspired by a comment on this previous post, where we looked at some code to select entities on a specific layer. The question was regarding how best to select entities from multiple layers: the selection filtering mechanism inside AutoCAD makes this very easy, and can cope with composition of conditions related to […]
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In the introductory post we first looked at a simple turtle graphics engine for AutoCAD, which was followed up by this series looking at using it to generate fractals (here are parts 1 & 2). This post continues the organic fractal theme, by looking at another fractal found in nature, the humble fern. I found […]