range.hpp 2.2 KB

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  1. /// @ref gtx_range
  2. /// @file glm/gtx/range.hpp
  3. /// @author Joshua Moerman
  4. ///
  5. /// @defgroup gtx_range GLM_GTX_range
  6. /// @ingroup gtx
  7. ///
  8. /// Include <glm/gtx/range.hpp> to use the features of this extension.
  9. ///
  10. /// Defines begin and end for vectors and matrices. Useful for range-based for loop.
  11. /// The range is defined over the elements, not over columns or rows (e.g. mat4 has 16 elements).
  12. #pragma once
  13. // Dependencies
  14. #include "../detail/setup.hpp"
  15. #ifndef GLM_ENABLE_EXPERIMENTAL
  16. # error "GLM: GLM_GTX_range is an experimental extension and may change in the future. Use #define GLM_ENABLE_EXPERIMENTAL before including it, if you really want to use it."
  17. #elif GLM_MESSAGES == GLM_ENABLE && !defined(GLM_EXT_INCLUDED)
  18. # pragma message("GLM: GLM_GTX_range extension included")
  19. #endif
  20. #include "../gtc/type_ptr.hpp"
  21. #include "../gtc/vec1.hpp"
  22. namespace glm
  23. {
  24. /// @addtogroup gtx_range
  25. /// @{
  26. # if GLM_COMPILER & GLM_COMPILER_VC
  27. # pragma warning(push)
  28. # pragma warning(disable : 4100) // unreferenced formal parameter
  29. # endif
  30. template<typename T, qualifier Q>
  31. inline length_t components(vec<1, T, Q> const& v)
  32. {
  33. return v.length();
  34. }
  35. template<typename T, qualifier Q>
  36. inline length_t components(vec<2, T, Q> const& v)
  37. {
  38. return v.length();
  39. }
  40. template<typename T, qualifier Q>
  41. inline length_t components(vec<3, T, Q> const& v)
  42. {
  43. return v.length();
  44. }
  45. template<typename T, qualifier Q>
  46. inline length_t components(vec<4, T, Q> const& v)
  47. {
  48. return v.length();
  49. }
  50. template<typename genType>
  51. inline length_t components(genType const& m)
  52. {
  53. return m.length() * m[0].length();
  54. }
  55. template<typename genType>
  56. inline typename genType::value_type const * begin(genType const& v)
  57. {
  58. return value_ptr(v);
  59. }
  60. template<typename genType>
  61. inline typename genType::value_type const * end(genType const& v)
  62. {
  63. return begin(v) + components(v);
  64. }
  65. template<typename genType>
  66. inline typename genType::value_type * begin(genType& v)
  67. {
  68. return value_ptr(v);
  69. }
  70. template<typename genType>
  71. inline typename genType::value_type * end(genType& v)
  72. {
  73. return begin(v) + components(v);
  74. }
  75. # if GLM_COMPILER & GLM_COMPILER_VC
  76. # pragma warning(pop)
  77. # endif
  78. /// @}
  79. }//namespace glm