By default and following GLSL specifications, vector and matrix default constructors initialize the components to zero. This is a reliable behavior but initialization has a cost and it’s not always necessary.
This behavior can be disable at compilation time by define GLM\_FORCE\_NO\_CTOR\_INIT before any inclusion of <glm/glm.hpp> or other GLM include.
This behavior can be disabled at compilation time by define GLM\_FORCE\_NO\_CTOR\_INIT before any inclusion of <glm/glm.hpp> or other GLM include.
GLM default behavior:
@ -494,7 +494,7 @@ GLM behavior using GLM\_FORCE\_NO\_CTOR\_INIT:
void foo()
{
glm::vec4 v; // v is fill with garbage
glm::vec4 v; // v is filled with garbage
...
}
```
@ -564,7 +564,7 @@ GLM 0.9.8 introduced GLM\_FORCE\_UNRESTRICTED\_GENTYPE define to relax this rest
#define GLM_FORCE_UNRESTRICTED_GENTYPE
#include<glm/glm.hpp>
#include "half.hpp" // Define “half” class with equivalent behavior than “float”
#include "half.hpp" // Define “half” class with behavior equivalent to “float”
@ -1090,7 +1090,7 @@ GTX extensions are qualified to be experimental extensions. In GLM this means th
time. GTC extensions are stabled, tested and perfectly reliable in time. Many GTX extensions extend GTC extensions and provide a way to explore features and implementations and APIs and then are promoted to GTC
extensions. This is fairly the way OpenGL features are developed; through extensions.
Stating with GLM 0.9.9, to use experimental extensions, an application but define GLM_ENABLE_EXPERIMENTAL.
Stating with GLM 0.9.9, to use experimental extensions, an application must define GLM_ENABLE_EXPERIMENTAL.
### <aname="section7_5"></a> 7.5. Where can I ask my questions?
@ -1132,7 +1132,7 @@ the [link](http://www.g-truc.net/post-0693.html#menu).
### <aname="section7_12"></a> 7.12. Windows headers cause build errors...
Some Windows headers define min and max as macros which may cause compatibility with third party libraries such as GLM.
It is highly recommanded to [define NOMINMAX](http://stackoverflow.com/questions/4913922/possible-problems-with-nominmax-on-visual-c) before including Windows headers to workaround this issue.
It is highly recommended to [define NOMINMAX](http://stackoverflow.com/questions/4913922/possible-problems-with-nominmax-on-visual-c) before including Windows headers to workaround this issue.
To workaround the incompatibility with these macros, GLM will systematically undef these macros if they are defined.
---
@ -1284,7 +1284,7 @@ glm::vec3 lighting(intersection const& Intersection, material const& Material, l
### <aname="section9_3"></a> 9.3. Projects using GLM
Leo’s Fortune is a platform adventure game where you hunt down the cunning and mysterious thief that stole your gold. Available on PS4, Xbox One, PC, Mac, iOS and Android.
@ -1370,7 +1370,7 @@ LibreOffice includes several applications that make it the most powerful Free an