#Glm permute vector swizzle how to#
#Glm permute vector swizzle portable#

Inline std::ostream& operator<<(std::ostream &os, vec3 vec) Return vec_type(d = vec.x, d = vec.y, d = vec.z) We use a vec_type in a template instead of forward declartions to prevent erros in some compilers. So this is my new and simple implementation template No command-lines neither using compiler-specific code. Well, I've found the solution myself using only the C++ Standards. Hope that this will help you at least somehow.

#Glm permute vector swizzle how to#

If you want to learn how to do it yourself you can refer to their source code (it is quite heavy with templates, though).

If your intent is to just be able to use GLSL math in C++, GLM is the way to do it.

Classes, however, are private by default.

Structs are public by default, no need in public here.

Unlike in C, you shouldn't typedef structs in C++ - if you named your structs, you can refer to them using that name as type.

Sorry, right now I can't test it, but I think that would do the trick. Anonymous structs are a non-standard extension that Microsoft added to their compiler. The only flags for g++ that could maybe make it compile your code are -fms-extensions and -fvisibility-ms-compat. Add -std=c++11 in your g++ compiler's arguments and this error will likely be gone.

OP has already posted an answer as a complete implementation of this idea.ДЄs for 'member with constructor not allowed in anonymous aggregate',, is due to compiler running in compliance with older standard, because as of C++11, unions can have members with non-trivial constructors (you defined your own constructor, so it's non-trivial, details about this can be found here). I think there is no standard solution to achieve vector swizzling perfectly.ДЇor non-standard solution, one can use a proxy class without constructors instead of vec2 to make the compiler work. In addition, aliasing vec2 with two floats would result in undefined behavior. Struct ДЄlthough this solution works, you can only access the members via, for example, v.xy.x, instead of simple v.x.

#Glm permute vector swizzle portable#

To write portable C++ code, you should avoid anonymous struct: struct vec2 // use C++ style struct declaration First, anonymous struct is a feature from C11, and is not allowed by C++, so it does not support class members with constructors (not a C struct).