1 files changed, 30 insertions, 0 deletions
diff --git a/src/libs/utils/mathutils.cpp b/src/libs/utils/mathutils.cpp
new file mode 100644
index 0000000000..465d4d5f99
--- /dev/null
+++ b/src/libs/utils/mathutils.cpp
@@ -0,0 +1,30 @@
+// Copyright (C) 2022 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0+ OR GPL-3.0 WITH Qt-GPL-exception-1.0
+
+#include "mathutils.h"
+
+#include <QtMath>
+
+namespace Utils::MathUtils {
+
+/*!
+    Linear interpolation:
+    For x = x1 it returns y1.
+    For x = x2 it returns y2.
+*/
+int interpolate(int x, int x1, int x2, int y1, int y2)
+{
+    if (x1 == x2)
+        return y1; // or the middle point between y1 and y2?
+    if (y1 == y2)
+        return y1;
+    if (x == x1)
+        return y1;
+    if (x == x2)
+        return y2;
+    const int numerator = (y2 - y1) * x + x2 * y1 - x1 * y2;
+    const int denominator = x2 - x1;
+    return qRound((double)numerator / denominator);
+}
+
+} // namespace Utils::Math