Index: ps/trunk/source/graphics/tests/test_Camera.h
===================================================================
--- ps/trunk/source/graphics/tests/test_Camera.h
+++ ps/trunk/source/graphics/tests/test_Camera.h
@@ -0,0 +1,93 @@
+/* Copyright (C) 2019 Wildfire Games.
+ * This file is part of 0 A.D.
+ *
+ * 0 A.D. is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 0 A.D. is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "lib/self_test.h"
+
+#include "graphics/Camera.h"
+#include "maths/MathUtil.h"
+#include "maths/Vector3D.h"
+
+#include <vector>
+
+class TestCamera : public CxxTest::TestSuite
+{
+public:
+	void test_frustum_perspective()
+	{
+		SViewPort viewPort;
+		viewPort.m_X = 0;
+		viewPort.m_Y = 0;
+		viewPort.m_Width = 512;
+		viewPort.m_Height = 512;
+
+		CCamera camera;
+		camera.SetViewPort(viewPort);
+		camera.LookAlong(
+			CVector3D(0.0f, 0.0f, 0.0f),
+			CVector3D(0.0f, 0.0f, 1.0f),
+			CVector3D(0.0f, 1.0f, 0.0f)
+		);
+		camera.SetProjection(1.0f, 101.0f, DEGTORAD(90.0f));
+		camera.UpdateFrustum();
+
+		const float sqrt2 = sqrtf(2.0f) / 2.0f;
+		const std::vector<CPlane> expectedPlanes = {
+			CVector4D(sqrt2, 0.0f, sqrt2, 0.0f),
+			CVector4D(-sqrt2, 0.0f, sqrt2, 0.0f),
+			CVector4D(0.0f, sqrt2, sqrt2, 0.0f),
+			CVector4D(0.0f, -sqrt2, sqrt2, 0.0f),
+			CVector4D(0.0f, 0.0f, -1.0f, 101.0f),
+			CVector4D(0.0f, 0.0f, 1.0f, -1.0f),
+		};
+		CheckFrustumPlanes(camera.GetFrustum(), expectedPlanes);
+	}
+
+	// Order of planes is unknown. So use interactive checker.
+	void CheckFrustumPlanes(const CFrustum& frustum, const std::vector<CPlane>& expectedPlanes)
+	{
+		TS_ASSERT_EQUALS(frustum.GetNumPlanes(), expectedPlanes.size());
+		std::set<size_t> indices;
+		for (size_t i = 0; i < expectedPlanes.size(); ++i)
+			indices.insert(i);
+
+		for (size_t i = 0; i < frustum.GetNumPlanes(); ++i)
+		{
+			bool found = false;
+			for (size_t j : indices)
+			{
+				if (EqualPlanes(frustum[i], expectedPlanes[j]))
+				{
+					found = true;
+					indices.erase(j);
+					break;
+				}
+			}
+			TS_ASSERT(found);
+		}
+	}
+
+	bool EqualPlanes(const CPlane& p1, const CPlane& p2) const
+	{
+		const float EPS = 1e-3f;
+		if (std::fabsf(p1.m_Dist - p2.m_Dist) >= EPS)
+			return false;
+		return
+			std::fabsf(p1.m_Norm.X - p2.m_Norm.X) < EPS &&
+			std::fabsf(p1.m_Norm.Y - p2.m_Norm.Y) < EPS &&
+			std::fabsf(p1.m_Norm.Z - p2.m_Norm.Z) < EPS;
+	}
+};