[ADD] Add skeleton form normal test

tests/05_rays.cpp

@@ -33,8 +33,6 @@ using namespace Raytracer;
 
 /* ------------------------------------------------------------------------- */
 
-/* ------------------------------------------------------------------------- */
-
 SCENARIO("Creating and querying a ray", "[features/rays.feature]")
 {
     GIVEN("origin <- point(1, 2, 3)")

tests/06_light_shading.cpp

@@ -0,0 +1,107 @@
+/*!
+ * 06_light_shading.cpp
+ *
+ * Copyright (c) 2015-2024, NADAL Jean-Baptiste. All rights reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ *
+ * @Author:  NADAL Jean-Baptiste
+ * @Date: 14/02/2024
+ *
+ */
+
+/*---------------------------------------------------------------------------*/
+
+#include <catch.hpp>
+
+#include "raytracing.h"
+
+using namespace Raytracer;
+
+/* ------------------------------------------------------------------------- */
+
+SCENARIO("The normal on a sphere at point a on the x axis", "[features/spheres.feature]")
+{
+    GIVEN("s <- sphere()")
+    {
+        WHEN("n <- normal_at(s, point(1,0,0))")
+        {
+            THEN("n = vector(1,0,0)")
+            {
+            }
+        }
+    }
+}
+
+/* ------------------------------------------------------------------------- */
+
+SCENARIO("The normal on a sphere at point a on the y axis", "[features/spheres.feature]")
+{
+    GIVEN("s <- sphere()")
+    {
+        WHEN("n <- normal_at(s, point(0,1,0))")
+        {
+            THEN("n = vector(0,1,0)")
+            {
+            }
+        }
+    }
+}
+
+/* ------------------------------------------------------------------------- */
+
+SCENARIO("The normal on a sphere at point a on the z axis", "[features/spheres.feature]")
+{
+    GIVEN("s <- sphere()")
+    {
+        WHEN("n <- normal_at(s, point(0,0,1))")
+        {
+            THEN("n = vector(0,0,1)")
+            {
+            }
+        }
+    }
+}
+
+/* ------------------------------------------------------------------------- */
+
+SCENARIO("The normal on a sphere at a nonaxial point", "[features/spheres.feature]")
+{
+    GIVEN("s <- sphere()")
+    {
+        WHEN("n <- normal_at(s, point(sqrt(3)/3,sqrt(3)/3,sqrt(3)/3))")
+        {
+            THEN("n = vector(sqrt(3)/3,sqrt(3)/3,sqrt(3)/3)")
+            {
+            }
+        }
+    }
+}
+
+/* ------------------------------------------------------------------------- */
+
+SCENARIO("The normal is a normalized vector", "[features/spheres.feature]")
+{
+    GIVEN("s <- sphere()")
+    {
+        WHEN("n <- normal_at(s, point(sqrt(3)/3,sqrt(3)/3,sqrt(3)/3))")
+        {
+            THEN("n = normalize(n)")
+            {
+            }
+        }
+    }
+}

tests/CMakeLists.txt

@@ -16,6 +16,7 @@ add_executable(raytracing_test
     03_matrix.cpp
     04_transformations.cpp
     05_rays.cpp
+    06_light_shading.cpp
 )
 
 include_directories("${CMAKE_SOURCE_DIR}/tests")