add cglm as 3rd-party library

1 files changed, 34 insertions, 0 deletions

diff --git a/libs/cglm/test/src/test_ray.h b/libs/cglm/test/src/test_ray.h
new file mode 100644
index 0000000..c1b0281
--- /dev/null
+++ b/libs/cglm/test/src/test_ray.h
@@ -0,0 +1,34 @@
+/*
+ * 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"
+
+TEST_IMPL(GLM_PREFIX, ray_triangle) {
+  /* Check whether a simple hit is recognized with the right distance */
+  vec3  origin    = { 0.0f,  0.0f,  0.0f};
+  vec3  direction = { 1.0f,  0.0f,  0.0f};
+  vec3  opposite  = {-1.0f,  0.0f,  0.0f};
+  vec3  v0        = { 5.0f, -1.0f,  1.0f};
+  vec3  v1        = { 5.0f, -1.0f, -1.0f};
+  vec3  v2        = { 5.0f,  1.0f,  0.0f};
+  float d;
+  bool  hit;
+
+  hit = GLM(ray_triangle)(origin, direction, v0, v1, v2, &d);
+  ASSERT(hit);
+  ASSERT(fabsf(d - 5.0f) <= 0.0000009);
+
+  /* Check whether a simple miss works */
+  hit = GLM(ray_triangle)(origin, opposite, v0, v1, v2, &d);
+  ASSERT(!hit);
+
+  /* Check that we can disregard distance and pass NULL pointer instead */
+  hit = GLM(ray_triangle)(origin, direction, v0, v1, v2, NULL);
+  ASSERT(hit);
+
+  TEST_SUCCESS
+}