In OpenGL some functions take pointers and these are easily handled via
v = Pointer.new('f', 20)
glVertexPointer(3, GL_FLOAT, 3, v)
(the C prototype is
void glVertexPointer(GLint size, GLenum type, GLsizei stride, const GLvoid *
pointer);
however in some cases this function has been overloaded so you pass in an
integer as the last parameter. In C this is easy
glVertexPointer(3, GL_FLOAT, 3, (void *) 12)
but how do I do this with MacRuby Pointer objects? (the source code and
googling hasn't helped). I can (and have) written this as an objective-C
method and called this method from ruby so I have a workaround. I can
understand if this is not possible or desirable from ruby as it is a horrible
bit of API design in OpenGL in any case.
Dave.
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