extract fovy and aspect for perpective matrix

test/src/test_cam.c

@@ -0,0 +1,25 @@
+/*
+ * Copyright (c), Recep Aslantas.
+ *
+ * MIT License (MIT), http://opensource.org/licenses/MIT
+ * Full license can be found in the LICENSE file
+ */
+
+#include "test_common.h"
+
+void
+test_camera_decomp(void **state) {
+  mat4  proj;
+  float aspect, fovy, nearVal, farVal;
+
+  aspect  = 0.782f;
+  fovy    = glm_rad(49.984f);
+  nearVal = 0.1f;
+  farVal  = 100.0f;
+
+  glm_perspective(fovy, aspect, nearVal, farVal, proj);
+  assert_true(fabsf(aspect  - glm_persp_aspect(proj)) < FLT_EPSILON);
+  assert_true(fabsf(fovy    - glm_persp_fovy(proj))   < FLT_EPSILON);
+  assert_true(fabsf(49.984f - glm_deg(glm_persp_fovy(proj))) < FLT_EPSILON);
+}
+

test/src/test_main.c

@@ -11,6 +11,9 @@ main(int argc, const char * argv[]) {
   const struct CMUnitTest tests[] = {
     /* mat4 */
     cmocka_unit_test(test_mat4),
+
+    /* camera */
+    cmocka_unit_test(test_camera_decomp)
   };
 
   return cmocka_run_group_tests(tests,

test/src/test_tests.h

@@ -9,4 +9,8 @@
 /* mat4 */
 void test_mat4(void **state);
 
+/* camera */
+void
+test_camera_decomp(void **state);
+
 #endif /* test_tests_h */