1 files changed, 66 insertions, 0 deletions
diff --git a/libs/cglm/test/src/test_bezier.c b/libs/cglm/test/src/test_bezier.c
new file mode 100644
index 0000000..3089dd5
--- /dev/null
+++ b/libs/cglm/test/src/test_bezier.c
@@ -0,0 +1,66 @@
+/*
+ * 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"
+
+CGLM_INLINE
+float
+test_bezier_plain(float s, float p0, float c0, float c1, float p1) {
+  float x, xx, xxx, ss, sss;
+
+  x   = 1.0f - s;
+  xx  = x * x;
+  xxx = xx * x;
+  ss  = s * s;
+  sss = ss * s;
+
+  return p0 * xxx + 3.0f * (c0 * s * xx + c1 * ss * x) + p1 * sss;
+}
+
+CGLM_INLINE
+float
+test_hermite_plain(float s, float p0, float t0, float t1, float p1) {
+  float ss, sss;
+
+  ss  = s  * s;
+  sss = ss * s;
+
+  return p0 * (2.0f * sss - 3.0f * ss + 1.0f)
+       + t0 * (sss - 2.0f * ss + s)
+       + p1 * (-2.0f * sss + 3.0f * ss)
+       + t1 * (sss - ss);
+}
+
+TEST_IMPL(bezier) {
+  float s, p0, p1, c0, c1, smc, Bs, Bs_plain;
+
+  s        = test_rand();
+  p0       = test_rand();
+  p1       = test_rand();
+  c0       = test_rand();
+  c1       = test_rand();
+
+  /* test cubic bezier */
+  smc      = glm_smc(s, GLM_BEZIER_MAT, (vec4){p0, c0, c1, p1});
+  Bs       = glm_bezier(s, p0, c0, c1, p1);
+  Bs_plain = test_bezier_plain(s, p0, c0, c1, p1);
+
+  ASSERT(test_eq(Bs,  Bs_plain));
+  ASSERTIFY(test_assert_eqf(smc, Bs_plain))
+  ASSERTIFY(test_assert_eqf(Bs,  smc))
+
+  /* test cubic hermite */
+  smc      = glm_smc(s, GLM_HERMITE_MAT, (vec4){p0, p1, c0, c1});
+  Bs       = glm_hermite(s, p0, c0, c1, p1);
+  Bs_plain = test_hermite_plain(s, p0, c0, c1, p1);
+
+  ASSERT(test_eq(Bs,  Bs_plain));
+  ASSERT(test_eq(smc, Bs_plain));
+  ASSERT(test_eq(Bs,  smc));
+  
+  TEST_SUCCESS
+}