OpenGL glm库

 [OpenGL Mathematics](http://glm.g-truc.net/) (*GLM*) is a header only C++ mathematics library for graphics software based on the [OpenGL Shading Language (GLSL) specifications](https://www.opengl.org/registry/doc/GLSLangSpec.4.50.diff.pdf). *GLM* provides classes and functions designed and implemented with the same naming conventions and functionalities than *GLSL* so that anyone who knows *GLSL*, can use *GLM* as well in C++. This project isn't limited to *GLSL* features. An extension system, based on the *GLSL* extension conventions, provides extended capabilities: matrix transformations, quaternions, data packing, random numbers, noise, etc... This library works perfectly with *[OpenGL](https://www.opengl.org)* but it also ensures interoperability with other third party libraries and SDK. It is a good candidate for software rendering (raytracing / rasterisation), image processing, physic simulations and any development context that requires a simple and convenient mathematics library. *GLM* is written in C++98 but can take advantage of C++11 when supported by the compiler. It is a platform independent library with no dependence and it officially supports the following compilers: - [Apple Clang 5.0](https://developer.apple.com/library/mac/documentation/CompilerTools/Conceptual/LLVMCompilerOverview/index.html) and higher - [GCC](http://gcc.gnu.org/) 4.6 and higher - [Intel C++ Composer](https://software.intel.com/en-us/intel-compilers) XE 2013 and higher - [LLVM](http://llvm.org/) 3.2 and higher - [Visual C++](http://www.visualstudio.com/) 2010 and higher - [CUDA](https://developer.nvidia.com/about-cuda) 7.0 and higher (experimental) - Any conform C++98 or C++11 compiler For more information about *GLM*, please have a look at the [manual](http://glm.g-truc.net/0.9.7/glm-0.9.7.pdf) and the [API reference documentation](http://glm.g-truc.net/0.9.7/api/index.html). The source code and the documentation are licensed under the [Happy Bunny License (Modified MIT) or the MIT License](./copying.txt). Thanks for contributing to the project by [submitting issues](https://github.com/g-truc/glm/issues) for bug reports and feature requests. Any feedback is welcome at [glm@g-truc.net](mailto://glm@g-truc.net). ```c++ #include <glm/vec3.hpp> // glm::vec3 #include <glm/vec4.hpp> // glm::vec4 #include <glm/mat4x4.hpp> // glm::mat4 #include <glm/gtc/matrix_transform.hpp> // glm::translate, glm::rotate, glm::scale, glm::perspective #include <glm/gtc/constants.hpp> // glm::pi glm::mat4 camera(float Translate, glm::vec2 const & Rotate) { glm::mat4 Projection = glm::perspective(glm::pi<float>() * 0.25f, 4.0f / 3.0f, 0.1f, 100.f); glm::mat4 View = glm::translate(glm::mat4(1.0f), glm::vec3(0.0f, 0.0f, -Translate)); View = glm::rotate(View, Rotate.y, glm::vec3(-1.0f, 0.0f, 0.0f)); View = glm::rotate(View, Rotate.x, glm::vec3(0.0f, 1.0f, 0.0f)); glm::mat4 Model = glm::scale(glm::mat4(1.0f), glm::vec3(0.5f)); return Projection * View * Model; } ``` ## Project Health | Service | System | Compiler | Status | | ------- | ------ | -------- | ------ | | [Drone](https://drone.io/github.com/g-truc/glm) | Linux 64 bits | GCC 4.6.3 | [](https://drone.io/github.com/g-truc/glm/latest) | ## [Lastest release](https://github.com/g-truc/glm/releases/latest) ## Release notes #### [GLM 0.9.9.0](https://github.com/g-truc/glm/releases/latest) - 2017-XX-XX ##### Features: - Added RGBM encoding in GTC_packing #420 - Added GTC_color_encoding extension ##### Improvements: - Added lowp variant of GTC_colorspace convertLinearToSRGB #419 ##### Fixes: ##### Deprecation: - Removed GLM_GTX_simd_vec4 extension - Removed GLM_GTX_simd_mat4 extension - Removed GLM_GTX_simd_quat extension - Removed GLM_SWIZZLE, use GLM_FORCE_SWIZZLE instead - Removed GLM_MESSAGES, use GLM_FORCE_MESSAGES instead - Removed GLM_DEPTH_ZERO_TO_ONE, use GLM_FORCE_DEPTH_ZERO_TO_ONE instead - Removed GLM_LEFT_HANDED, use GLM_FORCE_LEFT_HANDED instead #### [GLM 0.9.8.2](https://github.com/g-truc/glm/releases/tag/0.9.8.2) - 2016-11-01 ##### Improvements: - Added Visual C++ 15 detection - Added Clang 4.0 detection - Added warning messages when using GLM_FORCE_CXX** but the compiler is known to not fully support the requested C++ version #555 - Refactored GLM_COMPILER_VC values - Made quat, vec, mat type component length() static #565 ##### Fixes: - Fixed Visual C++ constexpr build error #555, #556 #### [GLM 0.9.8.1](https://github.com/g-truc/glm/releases/tag/0.9.8.1) - 2016-09-25 ##### Improvements: - Optimized quaternion log function #554 ##### Fixes: - Fixed GCC warning filtering, replaced -pedantic by -Wpedantic - Fixed SIMD faceforward bug. #549 - Fixed GCC 4.8 with C++11 compilation option #550 - Fixed Visual Studio aligned type W4 warning #548 - Fixed packing/unpacking function fixed for 5_6_5 and 5_5_5_1 #552 #### [GLM 0.9.8.0](https://github.com/g-truc/glm/releases/tag/0.9.8.0) - 2016-09-11 ##### Features: - Added right and left handed projection and clip control support #447 #415 #119 - Added compNormalize and compScale functions to GTX_component_wise - Added packF3x9_E1x5 and unpackF3x9_E1x5 to GTC_packing for RGB9E5 #416 - Added (un)packHalf to GTC_packing - Added (un)packUnorm and (un)packSnorm to GTC_packing - Added 16bit pack and unpack to GTC_packing - Added 8bit pack and unpack to GTC_packing - Added missing bvec* && and || operators - Added iround and uround to GTC_integer, fast round on positive values - Added raw SIMD API - Added 'aligned' qualifiers - Added GTC_type_aligned with aligned *vec* types - Added GTC_functions extension - Added quaternion version of isnan and isinf #521 - Added lowestBitValue to GTX_bit #536 - Added GLM_FORCE_UNRESTRICTED_GENTYPE allowing non basic genType #543 ##### Improvements: - Improved SIMD and swizzle operators interactions with GCC and Clang #474 - Improved GTC_random linearRand documentation - Improved GTC_reciprocal documentation - Improved GLM_FORCE_EXPLICIT_CTOR coverage #481 - Improved OpenMP support detection for Clang, GCC, ICC and VC - Improved GTX_wrap for SIMD friendliness - Added constexpr for *vec*, *mat*, *quat* and *dual_quat* types #493 - Added NEON instruction set detection - Added MIPS CPUs detection - Added PowerPC CPUs detection - Use Cuda built-in function for abs function implementation with Cuda compiler - Factorized GLM_COMPILER_LLVM and GLM_COMPILER_APPLE_CLANG into GLM_COMPILER_CLANG - No more warnings for use of long long - Added more information to build messages ##### Fixes: - Fixed GTX_extended_min_max filename typo #386 - Fixed intersectRayTriangle to not do any unintentional backface culling - Fixed long long warnings when using C++98 on GCC and Clang #482 - Fixed sign with signed integer function on non-x86 architecture - Fixed strict aliasing warnings #473 - Fixed missing vec1 overload to length2 and distance2 functions #431 - Fixed GLM test '/fp:fast' and '/Za' command-line options are incompatible - Fixed quaterion to mat3 cast function mat3_cast from GTC_quaternion #542 - Fixed GTX_io for Cuda #547 #546 ##### Deprecation: - Removed GLM_FORCE_SIZE_FUNC define - Deprecated GLM_GTX_simd_vec4 extension - Deprecated GLM_GTX_simd_mat4 extension - Deprecated GLM_GTX_simd_quat extension - Deprecated GLM_SWIZZLE, use GLM_FORCE_SWIZZLE instead - Deprecated GLM_MESSAGES, use GLM_FORCE_MESSAGES instead -------------------------------------------------------------------------------- #### [GLM 0.9.7.6](https://github.com/g-truc/glm/releases/tag/0.9.7.6) - 2016-07-16 ##### Improvements: - Added pkg-config file #509 - Updated list of compiler versions detected - Improved C++ 11 STL detection #523 ##### Fixes: - Fixed STL for C++11 detection on ICC #510 - Fixed missing vec1 overload to length2 and distance2 functions #431 - Fixed long long warnings when using C++98 on GCC and Clang #482 - Fixed scalar reciprocal functions (GTC_reciprocal) #52