java/src/javazoom/jlgui/player/amp/equalizer/ui/Cubic.java

@@ -0,0 +1,46 @@
+/*
+ * Cubic.
+ * 
+ * JavaZOOM : jlgui@javazoom.net
+ *            http://www.javazoom.net
+ *
+ *-----------------------------------------------------------------------
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Library General Public License as published
+ *   by the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program 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 Library General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Library General Public
+ *   License along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *----------------------------------------------------------------------
+ */
+package javazoom.jlgui.player.amp.equalizer.ui;
+
+public class Cubic
+{
+    float a, b, c, d; /* a + b*u + c*u^2 +d*u^3 */
+
+    public Cubic(float a, float b, float c, float d)
+    {
+        this.a = a;
+        this.b = b;
+        this.c = c;
+        this.d = d;
+    }
+
+    /**
+     * Evaluate cubic.
+     * @param u
+     * @return
+     */
+    public float eval(float u)
+    {
+        return (((d * u) + c) * u + b) * u + a;
+    }
+}