Temp (#123)

* Coverage

* added fixes

* removed spacing

* removed junk

* removed print

* removed coverage

* removed useless stuff

* fix

---------

Co-authored-by: Saikari <lin@sz.cn.eu.org>

tests/general/unit_test_line_tracer_extra.cpp

@@ -0,0 +1,48 @@
+// Extra LineTracer tests
+#include <gtest/gtest.h>
+#include <omath/collision/line_tracer.hpp>
+#include <omath/linear_algebra/vector3.hpp>
+
+using namespace omath;
+using namespace omath::collision;
+
+TEST(LineTracerExtra, MissParallel)
+{
+    Triangle<Vector3<float>> tri({0,0,0},{1,0,0},{0,1,0});
+    Ray ray{ {0.3f,0.3f,1.f}, {0.3f,0.3f,2.f}, false };// parallel above triangle
+    auto hit = LineTracer::get_ray_hit_point(ray, tri);
+    EXPECT_EQ(hit, ray.end);
+}
+
+TEST(LineTracerExtra, HitCenter)
+{
+    Triangle<Vector3<float>> tri({0,0,0},{1,0,0},{0,1,0});
+    Ray ray{ {0.3f,0.3f,-1.f}, {0.3f,0.3f,1.f}, false };
+    auto hit = LineTracer::get_ray_hit_point(ray, tri);
+    ASSERT_FALSE(hit == ray.end);
+    EXPECT_NEAR(hit.x, 0.3f, 1e-6f);
+    EXPECT_NEAR(hit.y, 0.3f, 1e-6f);
+    EXPECT_NEAR(hit.z, 0.f, 1e-6f);
+}
+
+TEST(LineTracerExtra, HitOnEdge)
+{
+    Triangle<Vector3<float>> tri({0,0,0},{1,0,0},{0,1,0});
+    Ray ray{ {0.0f,0.0f,1.f}, {0.0f,0.0f,0.f}, false };
+    auto hit = LineTracer::get_ray_hit_point(ray, tri);
+    // hitting exact vertex/edge may be considered miss; ensure function handles without crash
+    if (hit != ray.end)
+    {
+        EXPECT_NEAR(hit.x, 0.0f, 1e-6f);
+        EXPECT_NEAR(hit.y, 0.0f, 1e-6f);
+    }
+}
+
+TEST(LineTracerExtra, InfiniteRayIgnoredIfBehind)
+{
+    Triangle<Vector3<float>> tri({0,0,0},{1,0,0},{0,1,0});
+    // Ray pointing away but infinite_length true should be ignored
+    Ray ray{ {0.5f,0.5f,-1.f}, {0.5f,0.5f,-2.f}, true };
+    auto hit = LineTracer::get_ray_hit_point(ray, tri);
+    EXPECT_EQ(hit, ray.end);
+}