wip

1 files changed, 144 insertions, 0 deletions

diff --git a/include/cglm/types.h b/include/cglm/types.h
new file mode 100644
index 0000000..7a482c0
--- /dev/null
+++ b/include/cglm/types.h
@@ -0,0 +1,144 @@
+/*
+ * Copyright (c), Recep Aslantas.
+ *
+ * MIT License (MIT), http://opensource.org/licenses/MIT
+ * Full license can be found in the LICENSE file
+ */
+
+#ifndef cglm_types_h
+#define cglm_types_h
+
+#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L)
+# include <stdalign.h>
+#endif
+
+#if defined(_MSC_VER)
+/* do not use alignment for older visual studio versions */
+/* also ARM32 also causes similar error, disable it for now on ARM32 too */
+#  if _MSC_VER < 1913 || _M_ARM /*  Visual Studio 2017 version 15.6  */
+#    define CGLM_ALL_UNALIGNED
+#    define CGLM_ALIGN(X) /* no alignment */
+#  else
+#    define CGLM_ALIGN(X) __declspec(align(X))
+#  endif
+#else
+#  define CGLM_ALIGN(X) __attribute((aligned(X)))
+#endif
+
+#ifndef CGLM_ALL_UNALIGNED
+#  define CGLM_ALIGN_IF(X) CGLM_ALIGN(X)
+#else
+#  define CGLM_ALIGN_IF(X) /* no alignment */
+#endif
+
+#ifdef __AVX__
+#  define CGLM_ALIGN_MAT CGLM_ALIGN(32)
+#else
+#  define CGLM_ALIGN_MAT CGLM_ALIGN(16)
+#endif
+
+#ifndef CGLM_HAVE_BUILTIN_ASSUME_ALIGNED
+
+#  if defined(__has_builtin)
+#    if __has_builtin(__builtin_assume_aligned)
+#      define CGLM_HAVE_BUILTIN_ASSUME_ALIGNED 1
+#    endif
+#  elif defined(__GNUC__) && defined(__GNUC_MINOR__)
+#    if __GNUC__ >= 4 && __GNUC_MINOR__ >= 7
+#      define CGLM_HAVE_BUILTIN_ASSUME_ALIGNED 1
+#    endif
+#  endif
+
+#  ifndef CGLM_HAVE_BUILTIN_ASSUME_ALIGNED
+#    define CGLM_HAVE_BUILTIN_ASSUME_ALIGNED 0
+#  endif
+
+#endif
+
+#if CGLM_HAVE_BUILTIN_ASSUME_ALIGNED
+#  define CGLM_ASSUME_ALIGNED(expr, alignment) \
+     __builtin_assume_aligned((expr), (alignment))
+#else
+#  define CGLM_ASSUME_ALIGNED(expr, alignment) (expr)
+#endif
+
+#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L)
+# define CGLM_CASTPTR_ASSUME_ALIGNED(expr, type) \
+   ((type*)CGLM_ASSUME_ALIGNED((expr), alignof(type)))
+#elif defined(_MSC_VER)
+# define CGLM_CASTPTR_ASSUME_ALIGNED(expr, type) \
+   ((type*)CGLM_ASSUME_ALIGNED((expr), __alignof(type)))
+#else
+# define CGLM_CASTPTR_ASSUME_ALIGNED(expr, type) \
+   ((type*)CGLM_ASSUME_ALIGNED((expr), __alignof__(type)))
+#endif
+
+typedef int                     ivec2[2];
+typedef int                     ivec3[3];
+typedef int                     ivec4[4];
+
+typedef float                   vec2[2];
+typedef float                   vec3[3];
+typedef CGLM_ALIGN_IF(16) float vec4[4];
+typedef vec4                    versor;     /* |x, y, z, w| -> w is the last */
+typedef vec3                    mat3[3];
+typedef vec2                    mat3x2[3];  /* [col (3), row (2)] */
+typedef vec4                    mat3x4[3];  /* [col (3), row (4)] */
+typedef CGLM_ALIGN_IF(16) vec2  mat2[2];
+typedef vec3                    mat2x3[2];  /* [col (2), row (3)] */
+typedef vec4                    mat2x4[2];  /* [col (2), row (4)] */
+typedef CGLM_ALIGN_MAT    vec4  mat4[4];
+typedef vec2                    mat4x2[4];  /* [col (4), row (2)] */
+typedef vec3                    mat4x3[4];  /* [col (4), row (3)] */
+
+/*
+  Important: cglm stores quaternion as [x, y, z, w] in memory since v0.4.0 
+  it was [w, x, y, z] before v0.4.0 ( v0.3.5 and earlier ). w is real part.
+*/
+
+#define GLM_E         2.71828182845904523536028747135266250   /* e           */
+#define GLM_LOG2E     1.44269504088896340735992468100189214   /* log2(e)     */
+#define GLM_LOG10E    0.434294481903251827651128918916605082  /* log10(e)    */
+#define GLM_LN2       0.693147180559945309417232121458176568  /* loge(2)     */
+#define GLM_LN10      2.30258509299404568401799145468436421   /* loge(10)    */
+#define GLM_PI        3.14159265358979323846264338327950288   /* pi          */
+#define GLM_PI_2      1.57079632679489661923132169163975144   /* pi/2        */
+#define GLM_PI_4      0.785398163397448309615660845819875721  /* pi/4        */
+#define GLM_1_PI      0.318309886183790671537767526745028724  /* 1/pi        */
+#define GLM_2_PI      0.636619772367581343075535053490057448  /* 2/pi        */
+#define GLM_TAU       6.283185307179586476925286766559005768  /* tau         */
+#define GLM_TAU_2     GLM_PI                                  /* tau/2       */
+#define GLM_TAU_4     GLM_PI_2                                /* tau/4       */
+#define GLM_1_TAU     0.159154943091895335768883763372514362  /* 1/tau       */
+#define GLM_2_TAU     0.318309886183790671537767526745028724  /* 2/tau       */
+#define GLM_2_SQRTPI  1.12837916709551257389615890312154517   /* 2/sqrt(pi)  */
+#define GLM_SQRTTAU   2.506628274631000502415765284811045253  /* sqrt(tau)   */
+#define GLM_SQRT2     1.41421356237309504880168872420969808   /* sqrt(2)     */
+#define GLM_SQRT1_2   0.707106781186547524400844362104849039  /* 1/sqrt(2)   */
+
+#define GLM_Ef         ((float)GLM_E)
+#define GLM_LOG2Ef     ((float)GLM_LOG2E)
+#define GLM_LOG10Ef    ((float)GLM_LOG10E)
+#define GLM_LN2f       ((float)GLM_LN2)
+#define GLM_LN10f      ((float)GLM_LN10)
+#define GLM_PIf        ((float)GLM_PI)
+#define GLM_PI_2f      ((float)GLM_PI_2)
+#define GLM_PI_4f      ((float)GLM_PI_4)
+#define GLM_1_PIf      ((float)GLM_1_PI)
+#define GLM_2_PIf      ((float)GLM_2_PI)
+#define GLM_TAUf       ((float)GLM_TAU)
+#define GLM_TAU_2f     ((float)GLM_TAU_2)
+#define GLM_TAU_4f     ((float)GLM_TAU_4)
+#define GLM_1_TAUf     ((float)GLM_1_TAU)
+#define GLM_2_TAUf     ((float)GLM_2_TAU)
+#define GLM_2_SQRTPIf  ((float)GLM_2_SQRTPI)
+#define GLM_2_SQRTTAUf ((float)GLM_SQRTTAU)
+#define GLM_SQRT2f     ((float)GLM_SQRT2)
+#define GLM_SQRT1_2f   ((float)GLM_SQRT1_2)
+
+/* DEPRECATED! use GLM_PI and friends */
+#define CGLM_PI       GLM_PIf
+#define CGLM_PI_2     GLM_PI_2f
+#define CGLM_PI_4     GLM_PI_4f
+
+#endif /* cglm_types_h */