How to cast int to const GLvoid*?

Question

In my cross platform OpenGL application I want to draw using vertex buffer objects. However I run into problems invoking glDrawRangeElements.

glDrawRangeEle         


        

Answer 1

I got it to compile using CLang and c++11 when I used ancient c style casting.

glDrawRangeElements(GL_TRIANGLES, start, start + count, count, GL_UNSIGNED_INT,
        (GLvoid *)  (start * sizeof(unsigned int)));

Alternatives that I liked less but were also accepted by compiler were

glDrawRangeElements(GL_TRIANGLES, start, start + count, count, GL_UNSIGNED_INT,
  reinterpret_cast(static_cast(start * sizeof(unsigned int))));


glDrawRangeElements(GL_TRIANGLES, start, start + count, count, GL_UNSIGNED_INT,
    (char *)(0) +  start * sizeof(unsigned int));