--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ai/utilities.d	Wed Mar 25 11:28:25 2009 -0400
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2009, Mason Green (zzzzrrr)
+ * http://www.dsource.org/projects/openmelee
+ * 
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice,
+ *   this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ * * Neither the name of the polygonal nor the names of its contributors may be
+ *   used to endorse or promote products derived from this software without specific
+ *   prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+module openmelee.ai.utilities;
+ 
+import tango.math.random.Kiss : Kiss;
+
+float scalarRandomWalk(float initial, float walkspeed, float min, float max) {
+	
+	float next = initial + (((randomRange(0, 1) * 2) - 1) * walkspeed);
+	if (next < min) return min;
+	if (next > max) return max;
+	return next;
+}
+
+// ----------------------------------------------------------------------------
+// classify a value relative to the interval between two bounds:
+//     returns -1 when below the lower bound
+//     returns  0 when between the bounds (inside the interval)
+//     returns +1 when above the upper bound
+int intervalComparison(float x, float lowerBound, float upperBound)
+{
+    if (x < lowerBound) return -1;
+    if (x > upperBound) return +1;
+    return 0;
+}
+
+T randomRange(T = int) (T min, T max)
+{
+    return min + Kiss.instance.natural() % (max + 1 - min);
+}