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I have OpenGL method :

glStencilFillPathInstancedNV(6, glyphBase,
                                 GL_UNSIGNED_BYTE, "OpenGL",
                                 GL_PATH_FILL_MODE_NV, 0xFF,
                                 GL_TRANSLATE_2D_NV, xtranslate);

Where xtranslate should be an array of GLfloat where each consecutive pair of numbers represent 2 dim vector. In my app the data structure representing xtranslate is:

std::vector<glm::vec2> xtranslate;

How do I get the data pointer to this structure so that it's valid to be passed into the above mentioned method as GLFloat*

Should I manually "flatten" the structure into array or there is some trickier solution?

Glm is the OpenGL template only math library.

Btw , I have seen that OpenSceneGraph API has such a method for its vector structures , but I couldn't find the source for the implementation.

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  • Is using C++11 allowed for you? Commented May 1, 2013 at 11:54
  • How hard does it crash if you just go with &(xtranslate[0].x)? :) Commented May 1, 2013 at 12:49
  • Just because I believe such an attempt will be useless I even not going to try it ;) Because it will get only a single pointer to a single float in the first vec2... Commented May 1, 2013 at 12:52
  • I'm pretty sure every implementation of std::vector stores its contents in an array. I would believe glm::vec2 is nothing more than a struct with two floats. If the float used by vec2 is the same as GLfloat, it might work. Commented May 1, 2013 at 13:02
  • stackoverflow.com/questions/7856364/… Commented May 1, 2013 at 13:10
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