Rename plugins to external

applications/external/airmouse/tracking/util/matrix_3x3.cc

@@ -0,0 +1,121 @@
+/*
+ * Copyright 2019 Google Inc. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "matrix_3x3.h"
+
+namespace cardboard {
+
+Matrix3x3::Matrix3x3(double m00, double m01, double m02, double m10, double m11, double m12,
+    double m20, double m21, double m22)
+    : elem_ { { { m00, m01, m02 }, { m10, m11, m12 }, { m20, m21, m22 } } }
+{
+}
+
+Matrix3x3::Matrix3x3()
+{
+    for (int row = 0; row < 3; ++row) {
+        for (int col = 0; col < 3; ++col)
+            elem_[row][col] = 0;
+    }
+}
+
+Matrix3x3 Matrix3x3::Zero()
+{
+    Matrix3x3 result;
+    return result;
+}
+
+Matrix3x3 Matrix3x3::Identity()
+{
+    Matrix3x3 result;
+    for (int row = 0; row < 3; ++row) {
+        result.elem_[row][row] = 1;
+    }
+    return result;
+}
+
+void Matrix3x3::MultiplyScalar(double s)
+{
+    for (int row = 0; row < 3; ++row) {
+        for (int col = 0; col < 3; ++col)
+            elem_[row][col] *= s;
+    }
+}
+
+Matrix3x3 Matrix3x3::Negation() const
+{
+    Matrix3x3 result;
+    for (int row = 0; row < 3; ++row) {
+        for (int col = 0; col < 3; ++col)
+            result.elem_[row][col] = -elem_[row][col];
+    }
+    return result;
+}
+
+Matrix3x3 Matrix3x3::Scale(const Matrix3x3& m, double s)
+{
+    Matrix3x3 result;
+    for (int row = 0; row < 3; ++row) {
+        for (int col = 0; col < 3; ++col)
+            result.elem_[row][col] = m.elem_[row][col] * s;
+    }
+    return result;
+}
+
+Matrix3x3 Matrix3x3::Addition(const Matrix3x3& lhs, const Matrix3x3& rhs)
+{
+    Matrix3x3 result;
+    for (int row = 0; row < 3; ++row) {
+        for (int col = 0; col < 3; ++col)
+            result.elem_[row][col] = lhs.elem_[row][col] + rhs.elem_[row][col];
+    }
+    return result;
+}
+
+Matrix3x3 Matrix3x3::Subtraction(const Matrix3x3& lhs, const Matrix3x3& rhs)
+{
+    Matrix3x3 result;
+    for (int row = 0; row < 3; ++row) {
+        for (int col = 0; col < 3; ++col)
+            result.elem_[row][col] = lhs.elem_[row][col] - rhs.elem_[row][col];
+    }
+    return result;
+}
+
+Matrix3x3 Matrix3x3::Product(const Matrix3x3& m0, const Matrix3x3& m1)
+{
+    Matrix3x3 result;
+    for (int row = 0; row < 3; ++row) {
+        for (int col = 0; col < 3; ++col) {
+            result.elem_[row][col] = 0;
+            for (int i = 0; i < 3; ++i)
+                result.elem_[row][col] += m0.elem_[row][i] * m1.elem_[i][col];
+        }
+    }
+    return result;
+}
+
+bool Matrix3x3::AreEqual(const Matrix3x3& m0, const Matrix3x3& m1)
+{
+    for (int row = 0; row < 3; ++row) {
+        for (int col = 0; col < 3; ++col) {
+            if (m0.elem_[row][col] != m1.elem_[row][col])
+                return false;
+        }
+    }
+    return true;
+}
+
+} // namespace cardboard