Update affine.h

* to override float epsilon we just need to define GLM_FLT_EPSILON
* CGLM_USE_DEFAULT_EPSILON was redundant, also it forces to override system default epsilon which may not be good idea, because not all systems may support smaller epsilon values

include/cglm/affine.h

@@ -425,7 +425,7 @@ bool
 glm_uniscaled(mat4 m) {
   CGLM_ALIGN(8) vec3 s;
   glm_decompose_scalev(m, s);
-  return glm_vec3_eq_all(s);
+  return glm_vec3_eq_eps(s, s[0]);
 }
 
 /*!

include/cglm/common.h

@@ -42,12 +42,18 @@
 #include "types.h"
 #include "simd/intrin.h"
 
-#ifndef CGLM_USE_DEFAULT_EPSILON
-#  ifndef GLM_FLT_EPSILON
-#    define GLM_FLT_EPSILON 1e-6
+/** CGLM_USE_DEFAULT_EPSILON is removed, to override float epsilon,
+ *  just define GLM_FLT_EPSILON with epsilon value like below
+ *
+ *  #define GLM_FLT_EPSILON 1e-6f
+ */
+
+#ifndef GLM_FLT_EPSILON
+#  ifndef FLT_EPSILON
+#    define GLM_FLT_EPSILON 1e-6f
+#  else
+#    define GLM_FLT_EPSILON FLT_EPSILON
 #  endif
-#else
-#  define GLM_FLT_EPSILON FLT_EPSILON
 #endif
 
 #endif /* cglm_common_h */

test/src/test_cam.c

@@ -35,9 +35,9 @@ TEST_IMPL(camera_decomp) {
   farVal  = 100.0f;
 
   glm_perspective(fovy, aspect, nearVal, farVal, proj);
-  ASSERT(fabsf(aspect  - glm_persp_aspect(proj)) < GLM_FLT_EPSILON)
-  ASSERT(fabsf(fovy    - glm_persp_fovy(proj))   < GLM_FLT_EPSILON)
-  ASSERT(fabsf(49.984f - glm_deg(glm_persp_fovy(proj))) < GLM_FLT_EPSILON)
+  ASSERT(fabsf(aspect  - glm_persp_aspect(proj)) < 1e-5f)
+  ASSERT(fabsf(fovy    - glm_persp_fovy(proj))   < 1e-5f)
+  ASSERT(fabsf(49.984f - glm_deg(glm_persp_fovy(proj))) < 1e-5f)
 
   glm_persp_sizes(proj, fovy, sizes);
 

test/src/test_common.h

@@ -106,7 +106,7 @@ test_rand_quat(versor q);
 CGLM_INLINE
 bool
 test_eq(float a, float b) {
-  return fabsf(a - b) <= GLM_FLT_EPSILON * 10;
+  return fabsf(a - b) <= 1e-5f;
 }
 
 CGLM_INLINE