[FEAT] Add matrix

tests/02_1_colors.cpp

@@ -1,5 +1,5 @@
 /*!
- * 02_colors.cpp
+ * 02_1_colors.cpp
  *
  * Copyright (c) 2015-2024, NADAL Jean-Baptiste. All rights reserved.
  *

tests/02_2_canvas.cpp

@@ -1,5 +1,5 @@
 /*!
- * 03_canvas.cpp
+ * 02_2_canvas.cpp
  *
  * Copyright (c) 2015-2024, NADAL Jean-Baptiste. All rights reserved.
  *

tests/03_matrix.cpp

@@ -0,0 +1,131 @@
+/*!
+ * 03_matrix.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: 01/02/2024
+ *
+ */
+
+/*---------------------------------------------------------------------------*/
+
+#include <catch.hpp>
+
+#include "matrix.h"
+
+using namespace Raytracer;
+
+/* ------------------------------------------------------------------------- */
+
+TEST_CASE("[Matrix] Constructing and inspecting a 4x4 matrix", "[Matrix]")
+{
+    Matrix m = {
+        {   1,    2,    3,    4},
+        { 5.5,  6.5,  7.5,  8.5},
+        {   9,   10,   11,   12},
+        {13.5, 14.5, 15.5, 16.5}
+    };
+
+    REQUIRE(m.rows() == 4);
+    REQUIRE(m.cols() == 4);
+
+    REQUIRE(m[0][0] == 1);
+    REQUIRE(m[0][3] == 4);
+    REQUIRE(m[1][0] == 5.5);
+    REQUIRE(m[1][2] == 7.5);
+    REQUIRE(m[2][2] == 11);
+    REQUIRE(m[3][0] == 13.5);
+    REQUIRE(m[3][2] == 15.5);
+}
+
+/* ------------------------------------------------------------------------- */
+
+TEST_CASE("[Matrix] A 2x2 matrix ought to be representable", "[Matrix]")
+{
+    Matrix m = {
+        {-3,  5},
+        { 1, -2}
+    };
+
+    REQUIRE(m.rows() == 2);
+    REQUIRE(m.cols() == 2);
+
+    REQUIRE(m[0][0] == -3);
+    REQUIRE(m[0][1] == 5);
+    REQUIRE(m[1][0] == 1);
+    REQUIRE(m[1][1] == -2);
+}
+
+/* ------------------------------------------------------------------------- */
+
+TEST_CASE("[Matrix] A 3x3 matrix ought to be representable", "[Matrix]")
+{
+    Matrix m = {
+        {-3,  5,  0},
+        { 1, -2, -7},
+        { 0,  1,  1}
+    };
+
+    REQUIRE(m.rows() == 3);
+    REQUIRE(m.cols() == 3);
+
+    REQUIRE(m[0][0] == -3);
+    REQUIRE(m[1][1] == -2);
+    REQUIRE(m[2][2] == 1);
+}
+
+/* ------------------------------------------------------------------------- */
+
+TEST_CASE("[Matrix] Matrix equality with identical matrices", "[Matrix]")
+{
+    Matrix a = {
+        {1, 2, 3, 4},
+        {5, 6, 7, 8},
+        {9, 8, 7, 6},
+        {5, 4, 3, 2}
+    };
+    Matrix b = {
+        {1, 2, 3, 4},
+        {5, 6, 7, 8},
+        {9, 8, 7, 6},
+        {5, 4, 3, 2}
+    };
+
+    REQUIRE(a == b);
+}
+
+/* ------------------------------------------------------------------------- */
+
+TEST_CASE("[Matrix] Matrix equality with different matrices", "[Matrix]")
+{
+    Matrix a = {
+        {1, 2, 3, 4},
+        {5, 6, 7, 8},
+        {9, 8, 7, 6},
+        {5, 4, 3, 2}
+    };
+    Matrix b = {
+        {2, 3, 4, 5},
+        {6, 7, 8, 9},
+        {8, 7, 6, 5},
+        {4, 3, 2, 1}
+    };
+
+    REQUIRE(a != b);
+}