[ADD] add a skeleton of the group and refactor some test datas.

tests/00_common_data.cpp

@@ -0,0 +1,54 @@
+/*!
+ * 00_common_data.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: 22/03/2024
+ *
+ */
+
+/*---------------------------------------------------------------------------*/
+
+#include <core/intersections.h>
+
+#include "common_data.h"
+
+using namespace Raytracer;
+
+/* ------------------------------------------------------------------------- */
+
+Intersections TestShape::local_intersect(const Ray &a_ray)
+{
+    saved_ray = a_ray;
+    return Intersections();
+}
+
+/* ------------------------------------------------------------------------- */
+
+Tuple TestShape::local_normal_at(const Tuple &a_local_point) const
+{
+    return Tuple::Vector(a_local_point.x(), a_local_point.y(), a_local_point.z());
+}
+
+/* ------------------------------------------------------------------------- */
+
+const Color TestPattern::pattern_at(const Tuple &a_point) const
+{
+    return Color(a_point.x(), a_point.y(), a_point.z());
+}