Being a quite popular buzz word, augmented reality can be build with some distinct algorithms which can be learnt separately. Usually it covers: planar object detection (can be a marker or previously trained object). SURF/SIFT/FAST descriptors, RANSAC for homography matrix calculation store trained objects in DB (KD-trees) camera position estimation augmenting 3D model with custom … Read more
Like described by Jon Skeet in this SO answer, it is best practice to pick some prime numbers and multiply these with the single hash codes, then sum everything up. public int GetHashCode() { unchecked { int hash = 17; // Maybe nullity checks, if these are objects not primitives! hash = hash * 23 … Read more
You could think of a heuristic like an approximate (not approximation) solution to a problem. The difference between approximate and approximation is that the first is about getting a good guess of the solution of a problem, but that you don’t really know how good it is. The second is about getting a solution for … Read more
Two’s complement is a clever way of storing integers so that common math problems are very simple to implement. To understand, you have to think of the numbers in binary. It basically says, for zero, use all 0’s. for positive integers, start counting up, with a maximum of 2(number of bits – 1)-1. for negative … Read more
Doing something programatically generally means that you can do it using source code, rather than via direct user interaction or a macro. For example, consider the problem of resizing columns to fit in Excel. You could do it manually by double clicking between the columns, but that requires user interaction. You could use the excel … Read more
“Indirection” is using something that uses something else, in its broadest sense. So your example, using a pointer of a value instead of the value, fits this definition at one level. The pointer is the something and the value is the something else. Typically this is something larger in scope: Using a web site to … Read more
Generally it means that by increasing the level of abstraction one can make the problem easier to understand/resolve. Be careful with your abstractions though, the full quote at least as I heard it is, “You can solve every problem with another level of indirection, except for the problem of too many levels of indirection”.
Neither approach has a clear advantage over the other – if one approach was always better, chances are that we’d start using it everywhere! Generally speaking, compilers offer the following advantages: Because they can see all the code up-front, they can perform a number of analyses and optimizations when generating code that makes the final … Read more
The reason that Turing Machines are a big deal has to do with the study of classical Computing Science or Theory of Computation type stuff. It’s basically about analyzing the general properties of a computer, such as what theoretical abilities and limitations a computer has, as well as what we mean when we talk about … Read more
You might check out how Martin Erwig’s Haskell functional graph library does things. For instance, its shortest-path functions are all pure, and you can see the source code for how it’s implemented. Another option, like fmark mentioned, is to use an abstraction which allows you to implement pure functions in terms of state. He mentions … Read more