runelite-api: add Experience class for xpForLevel and levelForXp

2017-05-10 16:15:07 -04:00
parent fe13b29fa4
commit 64f99a909a
2 changed files with 152 additions and 0 deletions
--- a/runelite-api/src/main/java/net/runelite/api/Experience.java
+++ b/runelite-api/src/main/java/net/runelite/api/Experience.java
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2017, Adam <Adam@sigterm.info>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * 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.
+ */
+package net.runelite.api;
+
+public class Experience
+{
+	/**
+	 * Maximum level under 200m xp
+	 */
+	private static final int MAX_VIRT_LEVEL = 126;
+
+	private static final int[] XP_FOR_LEVEL = new int[MAX_VIRT_LEVEL];
+
+	static
+	{
+		int xp = 0;
+
+		for (int level = 1; level <= MAX_VIRT_LEVEL; ++level)
+		{
+			int difference = (int) ((double) level + 300.0 * Math.pow(2.0, (double) level / 7.0));
+			xp += difference;
+
+			XP_FOR_LEVEL[level - 1] = xp / 4;
+		}
+	}
+
+	public static int getXpForLevel(int level)
+	{
+		if (level < 2 || level > MAX_VIRT_LEVEL)
+		{
+			throw new IllegalArgumentException();
+		}
+
+		// XP_FOR_LEVEL[0] is XP for level 2
+		return XP_FOR_LEVEL[level - 2];
+	}
+
+	public static int getLevelForXp(int xp)
+	{
+		if (xp < 0)
+		{
+			throw new IllegalArgumentException();
+		}
+
+		int low = 0;
+		int high = XP_FOR_LEVEL.length - 1;
+
+		while (low <= high)
+		{
+			int mid = low + (high - low) / 2;
+			int xpForLevel = XP_FOR_LEVEL[mid];
+
+			if (xp < xpForLevel)
+			{
+				high = mid - 1;
+			}
+			else if (xp > xpForLevel)
+			{
+				low = mid + 1;
+			}
+			else
+			{
+				break;
+			}
+		}
+
+		return high + 2;
+	}
+}