Geometry
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As mentioned in the last post, today's post looks at how to draw hyperbolic geometry using the Poincaré disk model inside AutoCAD. This is an interesting exercise, but probably won't ultimately help us with the hyperbolic tessellations we're aiming to create: it's interesting as it will end up with us having a mechanism for mapping […]
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A regular follower of this blog and someone I now consider a friend through our online interactions, Alex Fielder, recently laid down the gauntlet for the topic of the coming series of posts. He started with Twitter… … and then moved on to The Swamp (which he thankfully also brought to my attention using Twitter). […]
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A couple of recent posts have covered different ways of checking whether a point is on a curve. This post looks at a rudimentary way of profiling the relative performance of these various methods, in order to determine the best approach to use, in general. There are various performance profiling technologies available on the market, […]
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One great thing about having an engaged blog readership is that people catch issues quickly (which helps keep me honest :-). When I posted late on a Friday night (under self-imposed pressure to get a third post up in a four-day first week back after the holidays), I suspected I'd missed something. I even checked […]
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Occasionally I come across a topic that I'm sure I've addressed in a previous post, but for the life of me I can't track it down. The code in a recent response by Balaji Ramamoorthy, from the DevTech India team, fits firmly into this category: it shows how to iterate through a polyline's segments, testing […]
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I'm not sure why it's taken me so long to get around to posting this code. It was originally developed by Philippe Leefsma for last year's Developer Days, to demonstrate a very interesting API added to AutoCAD 2012. Looking back, it appears it was covered in this DevTV session, posted when AutoCAD 2012 was announced, […]
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After using the Microsoft Kinect SDK to bring point clouds into AutoCAD and then to track skeleton information, I'm happy to report that I now have an equivalent implementation of this previous post, where we used OpenNI and NITE to understand gestures captured by the Kinect and draw 3D polylines inside AutoCAD. This implementation is […]
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Stephen Preston sent me an update to his minesweeper application, some time ago, and it's been languishing in my inbox until today. Stephen has spent some time polishing the app, adding a more coherent architecture (or so he tells me). As I'm busy beavering away with the Kinect SDK, I thought I'd go ahead and […]
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In the 2010 release, we introduced 2D geometric constraints to AutoCAD. The feature was implemented using AutoCAD's low-level – and very powerful – Associative Framework, which has subsequently been used to implement features such as parametric surfaces in AutoCAD 2011 (more information on that here). Our initial API implementation for creating and accessing geometric constraints […]
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I suspect that many of you who have worked with point clouds will have come across this issue: the standard CIRCLE command in AutoCAD will create the circle on the plane of the active User Coordinate System (UCS), even when the circle is defined by three points on its circumference. This behaviour is probably fine […]