Update README.md

remove builtin alignment from vec3 and mat3 types

README.md

@@ -24,6 +24,8 @@ you have the latest version
 - **[major change]** by starting v0.4.0, quaternions are stored as [x, y, z, w], it was [w, x, y, z] in v0.3.5 and earlier versions
 - **[api rename]** by starting v0.4.5, **glm_simd** functions are renamed to **glmm_**  
 - **[new option]** by starting v0.4.5, you can disable alignment requirement, check options in docs.  
+- **[major change]** by starting v0.5.0, vec3 functions use **glm_vec3_** namespace, it was **glm_vec_** until v0.5.0
+- **[major change]** by starting v0.5.1, built-in alignment is removed from **vec3** and **mat3** types
 
 #### Note for C++ developers:
 If you don't aware about original GLM library yet, you may also want to look at:
@@ -81,6 +83,7 @@ Currently *cglm* uses default clip space configuration (-1, 1) for camera functi
 - frustum (extract view frustum planes, corners...)
 - bounding box  (AABB in Frustum (culling), crop, merge...)
 - project, unproject
+- and other...
 
 <hr />
 
@@ -122,39 +125,6 @@ glm_mul(T, R, modelMat);
 glm_inv_tr(modelMat);
 ```
 
-## Contributors
-
-This project exists thanks to all the people who contribute. [[Contribute](CONTRIBUTING.md)].
-<a href="graphs/contributors"><img src="https://opencollective.com/cglm/contributors.svg?width=890&button=false" /></a>
-
-
-## Backers
-
-Thank you to all our backers! 🙏 [[Become a backer](https://opencollective.com/cglm#backer)]
-
-<a href="https://opencollective.com/cglm#backers" target="_blank"><img src="https://opencollective.com/cglm/backers.svg?width=890"></a>
-
-
-## Sponsors
-
-Support this project by becoming a sponsor. Your logo will show up here with a link to your website. [[Become a sponsor](https://opencollective.com/cglm#sponsor)]
-
-<a href="https://opencollective.com/cglm/sponsor/0/website" target="_blank"><img src="https://opencollective.com/cglm/sponsor/0/avatar.svg"></a>
-<a href="https://opencollective.com/cglm/sponsor/1/website" target="_blank"><img src="https://opencollective.com/cglm/sponsor/1/avatar.svg"></a>
-<a href="https://opencollective.com/cglm/sponsor/2/website" target="_blank"><img src="https://opencollective.com/cglm/sponsor/2/avatar.svg"></a>
-<a href="https://opencollective.com/cglm/sponsor/3/website" target="_blank"><img src="https://opencollective.com/cglm/sponsor/3/avatar.svg"></a>
-<a href="https://opencollective.com/cglm/sponsor/4/website" target="_blank"><img src="https://opencollective.com/cglm/sponsor/4/avatar.svg"></a>
-<a href="https://opencollective.com/cglm/sponsor/5/website" target="_blank"><img src="https://opencollective.com/cglm/sponsor/5/avatar.svg"></a>
-<a href="https://opencollective.com/cglm/sponsor/6/website" target="_blank"><img src="https://opencollective.com/cglm/sponsor/6/avatar.svg"></a>
-<a href="https://opencollective.com/cglm/sponsor/7/website" target="_blank"><img src="https://opencollective.com/cglm/sponsor/7/avatar.svg"></a>
-<a href="https://opencollective.com/cglm/sponsor/8/website" target="_blank"><img src="https://opencollective.com/cglm/sponsor/8/avatar.svg"></a>
-<a href="https://opencollective.com/cglm/sponsor/9/website" target="_blank"><img src="https://opencollective.com/cglm/sponsor/9/avatar.svg"></a>
-
-
-
-## License
-MIT. check the LICENSE file
-
 ## Build
 
 ### Unix (Autotools)
@@ -284,3 +254,35 @@ You can pass same way to another APIs e.g. Vulkan, DX...
 - [ ] Unaligned operations (e.g. `glm_umat4_mul`)
 - [x] Extra documentation
 - [ ] ARM Neon Arch (In Progress)
+
+
+## Contributors
+
+This project exists thanks to all the people who contribute. [[Contribute](CONTRIBUTING.md)].
+<a href="graphs/contributors"><img src="https://opencollective.com/cglm/contributors.svg?width=890&button=false" /></a>
+
+
+## Backers
+
+Thank you to all our backers! 🙏 [[Become a backer](https://opencollective.com/cglm#backer)]
+
+<a href="https://opencollective.com/cglm#backers" target="_blank"><img src="https://opencollective.com/cglm/backers.svg?width=890"></a>
+
+
+## Sponsors
+
+Support this project by becoming a sponsor. Your logo will show up here with a link to your website. [[Become a sponsor](https://opencollective.com/cglm#sponsor)]
+
+<a href="https://opencollective.com/cglm/sponsor/0/website" target="_blank"><img src="https://opencollective.com/cglm/sponsor/0/avatar.svg"></a>
+<a href="https://opencollective.com/cglm/sponsor/1/website" target="_blank"><img src="https://opencollective.com/cglm/sponsor/1/avatar.svg"></a>
+<a href="https://opencollective.com/cglm/sponsor/2/website" target="_blank"><img src="https://opencollective.com/cglm/sponsor/2/avatar.svg"></a>
+<a href="https://opencollective.com/cglm/sponsor/3/website" target="_blank"><img src="https://opencollective.com/cglm/sponsor/3/avatar.svg"></a>
+<a href="https://opencollective.com/cglm/sponsor/4/website" target="_blank"><img src="https://opencollective.com/cglm/sponsor/4/avatar.svg"></a>
+<a href="https://opencollective.com/cglm/sponsor/5/website" target="_blank"><img src="https://opencollective.com/cglm/sponsor/5/avatar.svg"></a>
+<a href="https://opencollective.com/cglm/sponsor/6/website" target="_blank"><img src="https://opencollective.com/cglm/sponsor/6/avatar.svg"></a>
+<a href="https://opencollective.com/cglm/sponsor/7/website" target="_blank"><img src="https://opencollective.com/cglm/sponsor/7/avatar.svg"></a>
+<a href="https://opencollective.com/cglm/sponsor/8/website" target="_blank"><img src="https://opencollective.com/cglm/sponsor/8/avatar.svg"></a>
+<a href="https://opencollective.com/cglm/sponsor/9/website" target="_blank"><img src="https://opencollective.com/cglm/sponsor/9/avatar.svg"></a>
+
+## License
+MIT. check the LICENSE file

configure.ac

@@ -7,7 +7,7 @@
 #*****************************************************************************
 
 AC_PREREQ([2.69])
-AC_INIT([cglm], [0.5.0], [info@recp.me])
+AC_INIT([cglm], [0.5.1], [info@recp.me])
 AM_INIT_AUTOMAKE([-Wall -Werror foreign subdir-objects])
 
 AC_CONFIG_MACRO_DIR([m4])

docs/source/conf.py

@@ -62,9 +62,9 @@ author = u'Recep Aslantas'
 # built documents.
 #
 # The short X.Y version.
-version = u'0.5.0'
+version = u'0.5.1'
 # The full version, including alpha/beta/rc tags.
-release = u'0.5.0'
+release = u'0.5.1'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.

docs/source/mat3.rst

@@ -29,6 +29,7 @@ Functions:
 #. :c:func:`glm_mat3_scale`
 #. :c:func:`glm_mat3_det`
 #. :c:func:`glm_mat3_inv`
+#. :c:func:`glm_mat3_trace`
 #. :c:func:`glm_mat3_swap_col`
 #. :c:func:`glm_mat3_swap_row`
 
@@ -133,6 +134,16 @@ Functions documentation
       | *[in]*  **mat**  matrix
       | *[out]* **dest** destination (inverse matrix)
 
+.. c:function:: void glm_mat3_trace(mat3 m)
+
+    | sum of the elements on the main diagonal from upper left to the lower right
+
+    Parameters:
+      | *[in]*  **m**  matrix
+
+    Returns:
+        trace of matrix
+
 .. c:function:: void  glm_mat3_swap_col(mat3 mat, int col1, int col2)
 
     swap two matrix columns

docs/source/mat4.rst

@@ -33,6 +33,8 @@ Functions:
 #. :c:func:`glm_mat4_mulN`
 #. :c:func:`glm_mat4_mulv`
 #. :c:func:`glm_mat4_mulv3`
+#. :c:func:`glm_mat3_trace`
+#. :c:func:`glm_mat3_trace3`
 #. :c:func:`glm_mat4_quat`
 #. :c:func:`glm_mat4_transpose_to`
 #. :c:func:`glm_mat4_transpose`
@@ -156,6 +158,27 @@ Functions documentation
     | *[in]*  **v**     vec3 (right, column vector)
     | *[out]* **dest**  vec3 (result, column vector)
 
+.. c:function:: void  glm_mat4_trace(mat4 m)
+
+    | sum of the elements on the main diagonal from upper left to the lower right
+
+    Parameters:
+      | *[in]*  **m**  matrix
+
+    Returns:
+        trace of matrix
+
+.. c:function:: void  glm_mat4_trace3(mat4 m)
+
+    | trace of matrix (rotation part)
+    | sum of the elements on the main diagonal from upper left to the lower right
+
+    Parameters:
+      | *[in]*  **m**  matrix
+
+    Returns:
+        trace of matrix
+
 .. c:function:: void  glm_mat4_quat(mat4 m, versor dest)
 
     convert mat4's rotation part to quaternion

docs/source/vec3.rst

@@ -39,7 +39,6 @@ Functions:
 #. :c:func:`glm_vec3_zero`
 #. :c:func:`glm_vec3_one`
 #. :c:func:`glm_vec3_dot`
-#. :c:func:`glm_vec3_cross`
 #. :c:func:`glm_vec3_norm2`
 #. :c:func:`glm_vec3_norm`
 #. :c:func:`glm_vec3_add`
@@ -65,6 +64,8 @@ Functions:
 #. :c:func:`glm_vec3_negate_to`
 #. :c:func:`glm_vec3_normalize`
 #. :c:func:`glm_vec3_normalize_to`
+#. :c:func:`glm_vec3_cross`
+#. :c:func:`glm_vec3_crossn`
 #. :c:func:`glm_vec3_distance2`
 #. :c:func:`glm_vec3_distance`
 #. :c:func:`glm_vec3_angle`
@@ -125,12 +126,21 @@ Functions documentation
 
 .. c:function:: void  glm_vec3_cross(vec3 a, vec3 b, vec3 d)
 
-    cross product
+    cross product of two vector (RH)
 
     Parameters:
-      | *[in]*  **a**  source 1
+      | *[in]*  **a**     vector 1
-      | *[in]*  **b**  source 2
+      | *[in]*  **b**     vector 2
-      | *[out]* **d**  destination
+      | *[out]* **dest**  destination
+
+.. c:function:: void  glm_vec3_crossn(vec3 a, vec3 b, vec3 dest)
+
+    cross product of two vector (RH) and normalize the result
+
+    Parameters:
+      | *[in]*  **a**     vector 1
+      | *[in]*  **b**     vector 2
+      | *[out]* **dest**  destination
 
 .. c:function:: float  glm_vec3_norm2(vec3 v)
 

include/cglm/call/mat3.h

@@ -44,6 +44,10 @@ CGLM_EXPORT
 void
 glmc_mat3_mulv(mat3 m, vec3 v, vec3 dest);
 
+CGLM_EXPORT
+float
+glmc_mat3_trace(mat3 m);
+
 CGLM_EXPORT
 void
 glmc_mat3_quat(mat3 m, versor dest);

include/cglm/call/mat4.h

@@ -61,6 +61,14 @@ CGLM_EXPORT
 void
 glmc_mat4_mulv3(mat4 m, vec3 v, float last, vec3 dest);
 
+CGLM_EXPORT
+float
+glmc_mat4_trace(mat4 m);
+
+CGLM_EXPORT
+float
+glmc_mat4_trace3(mat4 m);
+
 CGLM_EXPORT
 void
 glmc_mat4_quat(mat4 m, versor dest);

include/cglm/call/vec3.h

@@ -42,7 +42,11 @@ glmc_vec3_dot(vec3 a, vec3 b);
 
 CGLM_EXPORT
 void
-glmc_vec3_cross(vec3 a, vec3 b, vec3 d);
+glmc_vec3_cross(vec3 a, vec3 b, vec3 dest);
+
+CGLM_EXPORT
+void
+glmc_vec3_crossn(vec3 a, vec3 b, vec3 dest);
 
 CGLM_EXPORT
 float

include/cglm/cam.h

@@ -323,9 +323,7 @@ glm_lookat(vec3 eye,
   glm_vec3_sub(center, eye, f);
   glm_vec3_normalize(f);
 
-  glm_vec3_cross(f, up, s);
+  glm_vec3_crossn(f, up, s);
-  glm_vec3_normalize(s);
-
   glm_vec3_cross(s, f, u);
 
   dest[0][0] = s[0];

include/cglm/mat3.h

@@ -21,6 +21,7 @@
    CGLM_INLINE void  glm_mat3_transpose_to(mat3 m, mat3 dest);
    CGLM_INLINE void  glm_mat3_transpose(mat3 m);
    CGLM_INLINE void  glm_mat3_mulv(mat3 m, vec3 v, vec3 dest);
+   CGLM_INLINE float glm_mat3_trace(mat3 m);
    CGLM_INLINE void  glm_mat3_scale(mat3 m, float s);
    CGLM_INLINE float glm_mat3_det(mat3 mat);
    CGLM_INLINE void  glm_mat3_inv(mat3 mat, mat3 dest);
@@ -207,6 +208,18 @@ glm_mat3_mulv(mat3 m, vec3 v, vec3 dest) {
   dest[2] = m[0][2] * v[0] + m[1][2] * v[1] + m[2][2] * v[2];
 }
 
+/*!
+ * @brief trace of matrix
+ *
+ * sum of the elements on the main diagonal from upper left to the lower right
+ *
+ * @param[in]  m matrix
+ */
+CGLM_INLINE
+float
+glm_mat3_trace(mat3 m) {
+  return m[0][0] + m[1][1] + m[2][2];
+}
 
 /*!
  * @brief convert mat3 to quaternion

include/cglm/mat4.h

@@ -29,6 +29,8 @@
    CGLM_INLINE void  glm_mat4_mulN(mat4 *matrices[], int len, mat4 dest);
    CGLM_INLINE void  glm_mat4_mulv(mat4 m, vec4 v, vec4 dest);
    CGLM_INLINE void  glm_mat4_mulv3(mat4 m, vec3 v, vec3 dest);
+   CGLM_INLINE float glm_mat4_trace(mat4 m);
+   CGLM_INLINE float glm_mat4_trace3(mat4 m);
    CGLM_INLINE void  glm_mat4_transpose_to(mat4 m, mat4 dest);
    CGLM_INLINE void  glm_mat4_transpose(mat4 m);
    CGLM_INLINE void  glm_mat4_scale_p(mat4 m, float s);
@@ -338,6 +340,32 @@ glm_mat4_mulv(mat4 m, vec4 v, vec4 dest) {
 #endif
 }
 
+/*!
+ * @brief trace of matrix
+ *
+ * sum of the elements on the main diagonal from upper left to the lower right
+ *
+ * @param[in]  m matrix
+ */
+CGLM_INLINE
+float
+glm_mat4_trace(mat4 m) {
+  return m[0][0] + m[1][1] + m[2][2] + m[3][3];
+}
+
+/*!
+ * @brief trace of matrix (rotation part)
+ *
+ * sum of the elements on the main diagonal from upper left to the lower right
+ *
+ * @param[in]  m matrix
+ */
+CGLM_INLINE
+float
+glm_mat4_trace3(mat4 m) {
+  return m[0][0] + m[1][1] + m[2][2];
+}
+
 /*!
  * @brief convert mat4's rotation part to quaternion
  *

include/cglm/types.h

@@ -33,20 +33,18 @@
 #endif
 
 typedef float                   vec2[2];
-typedef CGLM_ALIGN_IF(8)  float vec3[3];
+typedef float                   vec3[3];
 typedef int                    ivec3[3];
 typedef CGLM_ALIGN_IF(16) float vec4[4];
+typedef vec4                    versor;
+typedef vec3                    mat3[3];
 
 #ifdef __AVX__
-typedef CGLM_ALIGN_IF(32) vec3  mat3[3];
 typedef CGLM_ALIGN_IF(32) vec4  mat4[4];
 #else
-typedef                   vec3  mat3[3];
 typedef CGLM_ALIGN_IF(16) vec4  mat4[4];
 #endif
 
-typedef vec4                    versor;
-
 #define GLM_E         2.71828182845904523536028747135266250   /* e           */
 #define GLM_LOG2E     1.44269504088896340735992468100189214   /* log2(e)     */
 #define GLM_LOG10E    0.434294481903251827651128918916605082  /* log10(e)    */

include/cglm/vec3.h

@@ -21,7 +21,6 @@
    CGLM_INLINE void  glm_vec3_zero(vec3 v);
    CGLM_INLINE void  glm_vec3_one(vec3 v);
    CGLM_INLINE float glm_vec3_dot(vec3 a, vec3 b);
-   CGLM_INLINE void  glm_vec3_cross(vec3 a, vec3 b, vec3 d);
    CGLM_INLINE float glm_vec3_norm2(vec3 v);
    CGLM_INLINE float glm_vec3_norm(vec3 v);
    CGLM_INLINE void  glm_vec3_add(vec3 a, vec3 b, vec3 dest);
@@ -47,6 +46,8 @@
    CGLM_INLINE void  glm_vec3_inv_to(vec3 v, vec3 dest);
    CGLM_INLINE void  glm_vec3_normalize(vec3 v);
    CGLM_INLINE void  glm_vec3_normalize_to(vec3 v, vec3 dest);
+   CGLM_INLINE void  glm_vec3_cross(vec3 a, vec3 b, vec3 d);
+   CGLM_INLINE void  glm_vec3_crossn(vec3 a, vec3 b, vec3 dest);
    CGLM_INLINE float glm_vec3_distance(vec3 a, vec3 b);
    CGLM_INLINE float glm_vec3_angle(vec3 a, vec3 b);
    CGLM_INLINE void  glm_vec3_rotate(vec3 v, float angle, vec3 axis);
@@ -166,22 +167,6 @@ glm_vec3_dot(vec3 a, vec3 b) {
   return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
 }
 
-/*!
- * @brief vec3 cross product
- *
- * @param[in]  a source 1
- * @param[in]  b source 2
- * @param[out] d destination
- */
-CGLM_INLINE
-void
-glm_vec3_cross(vec3 a, vec3 b, vec3 d) {
-  /* (u2.v3 - u3.v2, u3.v1 - u1.v3, u1.v2 - u2.v1) */
-  d[0] = a[1] * b[2] - a[2] * b[1];
-  d[1] = a[2] * b[0] - a[0] * b[2];
-  d[2] = a[0] * b[1] - a[1] * b[0];
-}
-
 /*!
  * @brief norm * norm (magnitude) of vec
  *
@@ -444,7 +429,7 @@ glm_vec3_maxadd(vec3 a, vec3 b, vec3 dest) {
  * it applies += operator so dest must be initialized
  *
  * @param[in]  a    vector
- * @param[in]  s    scalar
+ * @param[in]  b    scalar
  * @param[out] dest dest += min(a, b)
  */
 CGLM_INLINE
@@ -521,6 +506,36 @@ glm_vec3_normalize_to(vec3 v, vec3 dest) {
   glm_vec3_scale(v, 1.0f / norm, dest);
 }
 
+/*!
+ * @brief cross product of two vector (RH)
+ *
+ * @param[in]  a    vector 1
+ * @param[in]  b    vector 2
+ * @param[out] dest destination
+ */
+CGLM_INLINE
+void
+glm_vec3_cross(vec3 a, vec3 b, vec3 dest) {
+  /* (u2.v3 - u3.v2, u3.v1 - u1.v3, u1.v2 - u2.v1) */
+  dest[0] = a[1] * b[2] - a[2] * b[1];
+  dest[1] = a[2] * b[0] - a[0] * b[2];
+  dest[2] = a[0] * b[1] - a[1] * b[0];
+}
+
+/*!
+ * @brief cross product of two vector (RH) and normalize the result
+ *
+ * @param[in]  a    vector 1
+ * @param[in]  b    vector 2
+ * @param[out] dest destination
+ */
+CGLM_INLINE
+void
+glm_vec3_crossn(vec3 a, vec3 b, vec3 dest) {
+  glm_vec3_cross(a, b, dest);
+  glm_vec3_normalize(dest);
+}
+
 /*!
  * @brief angle betwen two vector
  *

include/cglm/vec4.h

@@ -333,7 +333,7 @@ glm_vec4_subs(vec4 v, float s, vec4 dest) {
  *
  * @param a    vector1
  * @param b    vector2
- * @param d dest = (a[0] * b[0], a[1] * b[1], a[2] * b[2], a[3] * b[3])
+ * @param dest dest = (a[0] * b[0], a[1] * b[1], a[2] * b[2], a[3] * b[3])
  */
 CGLM_INLINE
 void
@@ -426,7 +426,6 @@ glm_vec4_divs(vec4 v, float s, vec4 dest) {
 #endif
 }
 
-
 /*!
  * @brief add two vectors and add result to sum
  *
@@ -553,7 +552,7 @@ glm_vec4_maxadd(vec4 a, vec4 b, vec4 dest) {
  * it applies += operator so dest must be initialized
  *
  * @param[in]  a    vector
- * @param[in]  s    scalar
+ * @param[in]  b    scalar
  * @param[out] dest dest += min(a, b)
  */
 CGLM_INLINE

include/cglm/version.h

@@ -10,6 +10,6 @@
 
 #define CGLM_VERSION_MAJOR 0
 #define CGLM_VERSION_MINOR 5
-#define CGLM_VERSION_PATCH 0
+#define CGLM_VERSION_PATCH 1
 
 #endif /* cglm_version_h */

src/mat3.c

@@ -50,6 +50,12 @@ glmc_mat3_mulv(mat3 m, vec3 v, vec3 dest) {
   glm_mat3_mulv(m, v, dest);
 }
 
+CGLM_EXPORT
+float
+glmc_mat3_trace(mat3 m) {
+  return glm_mat3_trace(m);
+}
+
 CGLM_EXPORT
 void
 glmc_mat3_quat(mat3 m, versor dest) {

src/mat4.c

@@ -74,6 +74,18 @@ glmc_mat4_mulv3(mat4 m, vec3 v, float last, vec3 dest) {
   glm_mat4_mulv3(m, v, last, dest);
 }
 
+CGLM_EXPORT
+float
+glmc_mat4_trace(mat4 m) {
+  return glm_mat4_trace(m);
+}
+
+CGLM_EXPORT
+float
+glmc_mat4_trace3(mat4 m) {
+  return glm_mat4_trace3(m);
+}
+
 CGLM_EXPORT
 void
 glmc_mat4_quat(mat4 m, versor dest) {

src/vec3.c

@@ -40,8 +40,14 @@ glmc_vec3_dot(vec3 a, vec3 b) {
 
 CGLM_EXPORT
 void
-glmc_vec3_cross(vec3 a, vec3 b, vec3 d) {
+glmc_vec3_cross(vec3 a, vec3 b, vec3 dest) {
-  glm_vec3_cross(a, b, d);
+  glm_vec3_cross(a, b, dest);
+}
+
+CGLM_EXPORT
+void
+glmc_vec3_crossn(vec3 a, vec3 b, vec3 dest) {
+  glm_vec3_crossn(a, b, dest);
 }
 
 CGLM_EXPORT

test/src/test_mat3.c

@@ -24,9 +24,9 @@ test_mat3(void **state) {
   for (i = 0; i < m; i++) {
     for (j = 0; j < n; j++) {
       if (i == j)
-        assert_true(m3[i][j] == 1.0f);
+        assert_true(glm_eq(m3[i][j], 1.0f));
       else
-        assert_true(m3[i][j] == 0.0f);
+        assert_true(glm_eq(m3[i][j], 0.0f));
     }
   }
 

test/src/test_mat4.c

@@ -24,9 +24,9 @@ test_mat4(void **state) {
   for (i = 0; i < m; i++) {
     for (j = 0; j < n; j++) {
       if (i == j)
-        assert_true(m3[i][j] == 1.0f);
+        assert_true(glm_eq(m3[i][j], 1.0f));
       else
-        assert_true(m3[i][j] == 0.0f);
+        assert_true(glm_eq(m3[i][j], 0.0f));
     }
   }
 

test/src/test_quat.c

@@ -25,7 +25,7 @@ test_quat(void **state) {
 
   /* 0. test identiy quat */
   glm_quat_identity(q4);
-  assert_true(glm_quat_real(q4) == cosf(glm_rad(0.0f) * 0.5f));
+  assert_true(glm_eq(glm_quat_real(q4), cosf(glm_rad(0.0f) * 0.5f)));
   glm_quat_mat4(q4, rot1);
   test_assert_mat4_eq2(rot1, GLM_MAT4_IDENTITY, 0.000009);
 
@@ -118,7 +118,7 @@ test_quat(void **state) {
   /* 9. test imag, real */
 
   /* 9.1 real */
-  assert_true(glm_quat_real(q4) == cosf(glm_rad(-90.0f) * 0.5f));
+  assert_true(glm_eq(glm_quat_real(q4), cosf(glm_rad(-90.0f) * 0.5f)));
 
   /* 9.1 imag */
   glm_quat_imag(q4, imag);