wrapper | 易学教程

How to design a simple GLSL wrapper for shader use

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问题 UPDATE: Because I needed something right away, I've created a simple shader wrapper that does the sort of thing I need. You can find it here: ShaderManager on GitHub. Note that it's designed for Objective-C / iOS, so may not be useful to everyone. If you have any suggestions for design improvements, please let me know! Original Problem: I'm new to using GLSL shaders. I'm familiar enough with the GLSL language and the OpenGL interface, but I'm having trouble designing a simple API through

Does C++11 have wrappers for dynamically-allocated arrays like Boost's scoped_array?

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问题 I often need to deal with dynamically-allocated arrays in C++, and hence rely on Boost for scoped_array, shared_array, and the like. After reading through Stroustrup's C++11 FAQ and the C++11 Reference Wiki, I could not find a suitable replacement for these dynamic array wrappers that is provided by the C++11 standard. Is there something that I have overlooked, or do I have to continue relying on Boost? Thank you very much for your help! 回答1: There is a specialization of unique_ptr , like

How do I wrap a function in Javascript?

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问题 I'm writing a global error handling "module" for one of my applications. One of the features I want to have is to be able to easily wrap a function with a try{} catch{} block, so that all calls to that function will automatically have the error handling code that'll call my global logging method. (To avoid polluting the code everywhere with try/catch blocks). This is, however, slightly beyond my understanding of the low-level functioning of JavaScript, the .call and .apply methods, and the

Why can't I wrap a T* in an std::vector<T>?

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问题 I have a T* addressing a buffer with len elements of type T . I need this data in the form of an std::vector<T> , for certain reasons. As far as I can tell, I cannot construct a vector which uses my buffer as its internal storage. Why is that? Notes: Please don't suggest I use iterators - I know that's usually the way around such issues. I don't mind that the vector having to copy data around if it's resized later. This question especially baffles me now that C++ has move semantics. If we can

Calling Java from MATLAB

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问题 I have been using Swig to create a Java wrapper for a a library written in C++. The wrappers get generated into a package and then jar 'ed. The files are compiled correctly and work perfectly with java but I can't call it from MATLAB. I tried adding the path to the jar in the static Java path file in MATLAB and then calling the classes in the jar file but I get the error "Undefined variable or class.." Or if I try using javaObject(...) "No class * can be located on Java class path" . I'm not

Java allows to assign byte to java.lang.Short but not to java.lang.Integer

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问题 final byte b = 12; Short s = b; Integer i = b; Program compiles fine for Short but for Integer compilation fails with "incompatible types" message. I am having difficult time trying to understand this behavior. I could not find anything for this specific scenario.. 回答1: I attempted to duplicate this with a wider group of assignment contexts: final byte b = 12; Byte b2 = b; Character c = b; // Only an error if b isn't final char c2 = b; // Only an error if b isn't final Short s = b; // Only an

Fast implement wrapping (delegate methods) in Eclipse?

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问题 Is there some template or something to implement iterface methods with accessing to wrapped member? For example, suppose I have public class MyClass implements List<Something> { private final List<Something> core; ... } and now I want to implement List<Something> by passing calls to wrapped like @Override public int size() { return core.size(); } and so on. 回答1: There is. Use Source menu->Generate Delegate Methods... 回答2: I'll say a bit more about how the "Generate Delegate Methods"

C++ Class wrapper around fundamental types

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问题 Many libraries I have seen/used have typedefs to provide portable, fixed size variables, eg int8, uint8, int16, uint16, etc which will be the correct size regardless of platform (and c++11 does it itself with the header stdint.h) After recently using binary file i/o in a small library I'm writing I can see the benefit of using typedefs in this way to ensure the code is portable. However, if I'm going to the trouble of typing "namespace::uint32" rather than using built in fundamental types, I

How to fake type with Python

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问题 I recently developed a class named DocumentWrapper around some ORM document object in Python to transparently add some features to it without changing its interface in any way. I just have one issue with this. Let's say I have some User object wrapped in it. Calling isinstance(some_var, User) will return False because some_var indeed is an instance of DocumentWrapper . Is there any way to fake the type of an object in Python to have the same call return True ? 回答1: Testing the type of an

Is there any LAME C++ wrapper\\simplifier (working on Linux Mac and Win from pure code)?

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I want to create simple pcm to mp3 C++ project. I want it to use LAME. I love LAME but it's really big. so I need some kind of OpenSource working from pure code with pure lame code workflow simplifier. So to say I give it File with PCM and DEST file. Call something like: LameSimple.ToMP3(file with PCM, File with MP3 , 44100, 16, MP3, VBR); ore such thing in 4 - 5 lines (examples of course should exist) and I have vhat I needed It should be light, simple, powerfool, opensource, crossplatform. Is there any thing like this? Lame really isn't difficult to use, although there are a lot of optional