--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/libmlk-core/core/maths.c	Fri Oct 01 20:30:00 2021 +0200
@@ -0,0 +1,34 @@
+/*
+ * maths.c -- basic maths
+ *
+ * Copyright (c) 2020-2021 David Demelier <markand@malikania.fr>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "maths.h"
+
+int
+maths_is_boxed(int x, int y, unsigned int w, unsigned int h, int px, int py)
+{
+	return px > x &&
+	       py > y &&
+	       px < x + (int)w &&
+	       py < y + (int)h;
+}
+
+float
+maths_scale(float in, float old_min, float old_max, float new_min, float new_max)
+{
+	return (in / ((old_max - old_min) / (new_max - new_min))) + new_min;
+}