GLSL supports implicit conversions of vector and matrix types. For example, an ivec4 can be implicitly converted into vec4.
GLSL supports implicit conversions of vector and matrix types. For example, an ivec4 can be implicitly converted into `vec4`.
Often, this behaviour is not desirable but following the spirit of the library, this is the default behavior in GLM. However, GLM 0.9.6 introduced the define `GLM_FORCE_EXPLICIT_CTOR` to require explicit conversion for GLM types.
@ -370,7 +370,7 @@ void foo()
### <aname="section2_8"></a> 2.8. GLM\_FORCE\_INLINE: Force inline
To push further the software performance, a programmer can define GLM\_FORCE\_INLINE before any inclusion of `<glm/glm.hpp>` to force the compiler to inline GLM code.
To push further the software performance, a programmer can define `GLM_FORCE_INLINE` before any inclusion of `<glm/glm.hpp>` to force the compiler to inline GLM code.
```cpp
#define GLM_FORCE_INLINE
@ -385,7 +385,7 @@ TODO
GLM provides some SIMD optimizations based on [compiler intrinsics](https://msdn.microsoft.com/en-us/library/26td21ds.aspx).
These optimizations will be automatically thanks to compiler arguments.
For example, if a program is compiled with Visual Studio using /arch:AVX, GLM will detect this argument and generate code using AVX instructions automatically when available.
For example, if a program is compiled with Visual Studio using `/arch:AVX`, GLM will detect this argument and generate code using AVX instructions automatically when available.
It’s possible to avoid the instruction set detection by forcing the use of a specific instruction set with one of the fallowing define:
`GLM_FORCE_SSE2`, `GLM_FORCE_SSE3`, `GLM_FORCE_SSSE3`, `GLM_FORCE_SSE41`, `GLM_FORCE_SSE42`, `GLM_FORCE_AVX`, `GLM_FORCE_AVX2` or `GLM_FORCE_AVX512`.
@ -425,29 +425,29 @@ To use the default precision functionality, GLM provides some defines that need
#include<glm/glm.hpp>
```
Available defines for floating point types (glm::vec\*, glm::mat\*):
Available defines for floating point types (`glm::vec\*`, `glm::mat\*`):
Matrix transformation functions that follow the OpenGL fixed-function conventions.
For example, the ***lookAt*** function generates a transformation matrix that projects world coordinates into eye coordinates suitable for projection matrices (e.g. ***perspective***, ***ortho***). See the OpenGL compatibility specifications for more information about the layout of these generated matrices.
For example, the `lookAt` function generates a transformation matrix that projects world coordinates into eye coordinates suitable for projection matrices (e.g. `perspective`, `ortho`). See the OpenGL compatibility specifications for more information about the layout of these generated matrices.
The matrices generated by this extension use standard OpenGL fixed-function conventions. For example, the ***lookAt*** function generates a transform from world space into the specific eye space that the
projective matrix functions (***perspective***, ***ortho***, etc) are designed to expect. The OpenGL compatibility specifications define the particular layout of this eye space.
The matrices generated by this extension use standard OpenGL fixed-function conventions. For example, the `lookAt` function generates a transform from world space into the specific eye space that the
projective matrix functions (`perspective`, `ortho`, etc) are designed to expect. The OpenGL compatibility specifications define the particular layout of this eye space.
`<glm/gtc/matrix_transform.hpp>` need to be included to use these features.
Facilitate interactions between pointers to basic types (e.g. float*) and GLM types (e.g. mat4).
Facilitate interactions between pointers to basic types (e.g. `float*`) and GLM types (e.g. `mat4`).
This extension defines an overloaded function, glm::value_ptr, which returns a pointer to the memory layout of any GLM vector or matrix (vec3, mat4, etc.). Matrix types store their values in column-major order. This is useful for uploading data to matrices or for copying data to buffer objects.
This extension defines an overloaded function, `glm::value_ptr`, which returns a pointer to the memory layout of any GLM vector or matrix (`vec3`, `mat4`, etc.). Matrix types store their values in column-major order. This is useful for uploading data to matrices or for copying data to buffer objects.
```cpp
// GLM_GTC_type_ptr provides a safe solution:
@ -983,7 +1019,7 @@ void foo()
}
```
*Note: It would be possible to implement [*glVertex3fv*](http://www.opengl.org/sdk/docs/man2/xhtml/glVertex.xml)(glm::vec3(0)) in C++ with the appropriate cast operator that would result as an
*Note: It would be possible to implement [`glVertex3fv`](http://www.opengl.org/sdk/docs/man2/xhtml/glVertex.xml)(glm::vec3(0)) in C++ with the appropriate cast operator that would result as an
implicit cast in this example. However cast operators may produce programs running with unexpected behaviours without build error or any form of notification. *
`<glm/gtc/type_ptr.hpp>` need to be included to use these features.
Christophe Riccio
ago%!(EXTRA string=7 years)