Divide glm::vec3 by its own member

[koonschi]

Hello,
I have come across a strange issue. If you type

glm::vec3 v(1, 2, 3);
v /= v.y;

then v will hold
x = 0.5, y = 1, z = 3

instead of the expected

x = 0.5, y = 1, z = 1.5

This issue is present with all glm::vec types.

Edit: I was just investigating it more, it seems to be the case with all arithmetic operators.

[Groovounet]

Hi,

I managed to reproduce this bug on Visual C++ 2013 with GLM 0.9.5 branch... The most strange bug I have ever experienced. Oo

The code executed is:
template <typename T, precision P>
template
GLM_FUNC_QUALIFIER tvec3<T, P> & tvec3<T, P>::operator/=
(
U const & s
)
{
this->x /= static_cast(s);
this->y /= static_cast(s);
this->z /= static_cast(s);
return *this;
}

x and y are modified... z isn't. Oo

What version of GLM and what compiler are you using?

Thanks,
Christophe

[Groovounet]

So the problem is that the divisor is passed by const reference...

[koonschi]

It looks like it. I was using version 0.9.4.5 with gcc on linux. I had the problem with mingw on windows, too.
I was assuming that it might be due to that pass by reference ...

[Groovounet]

This bug has been fixed in GLM 0.9.4 and GLM 0.9.5 branch.

Thanks for contributing,
Christophe