test: test mat4_mul

test/src/test_mat4.c

@@ -0,0 +1,77 @@
+/*
+ * Copyright (c), Recep Aslantas.
+ *
+ * MIT License (MIT), http://opensource.org/licenses/MIT
+ * Full license can be found in the LICENSE file
+ */
+
+#include <time.h>
+#include <stdlib.h>
+#include <math.h>
+#include <float.h>
+
+#include "test_common.h"
+
+#define m 4
+#define n 4
+
+void
+test_mat4_mul(void **state) {
+  mat4  m1 = GLM_MAT4_IDENTITY_INIT;
+  mat4  m2 = GLM_MAT4_IDENTITY_INIT;
+  mat4  m3;
+  mat4  m4 = GLM_MAT4_ZERO_INIT;
+  int   i, j, k;
+
+  /* test identity matrix multiplication */
+  glm_mat4_mul(m1, m2, m3);
+  for (i = 0; i < m; i++) {
+    for (j = 0; j < n; j++) {
+      if (i == j)
+        assert_true(m3[i][j] == 1.0f);
+      else
+        assert_true(m3[i][j] == 0.0f);
+    }
+  }
+
+  /* test random matrices */
+  /* random matrices */
+  test_rand_mat4(m1);
+  test_rand_mat4(m2);
+
+  glm_mat4_mul(m1, m2, m3);
+  for (i = 0; i < m; i++) {
+    for (j = 0; j < n; j++) {
+      for (k = 0; k < m; k++)
+        /* column-major */
+        m4[i][j] += m1[k][j] * m2[i][k];
+    }
+  }
+
+  for (i = 0; i < m; i++) {
+    for (j = 0; j < n; j++) {
+      for (k = 0; k < m; k++)
+        assert_true(fabsf(m3[i][j] - m4[i][j]) <= FLT_EPSILON);
+    }
+  }
+
+  /* test pre compiled */
+  glmc_mat4_mul(m1, m2, m3);
+  for (i = 0; i < m; i++) {
+    for (j = 0; j < n; j++) {
+      for (k = 0; k < m; k++)
+        assert_true(fabsf(m3[i][j] - m4[i][j]) <= FLT_EPSILON);
+    }
+  }
+}
+
+int
+main(int argc, const char * argv[]) {
+  const struct CMUnitTest tests[] = {
+    cmocka_unit_test(test_mat4_mul)
+  };
+
+  return cmocka_run_group_tests(tests,
+                                NULL,
+                                NULL);
+}