Behold, Nenya, Ring of Water and repository for our media and animation related

goodies, both Java 2D and LWJGL/JME 3D. git-svn-id: svn+ssh://src.earth.threerings.net/nenya/trunk@1 ed5b42cb-e716-0410-a449-f6a68f950b19
2006-06-23 18:07:28 +00:00
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+//
+// $Id: MisoSceneMetrics.java 3310 2005-01-24 23:08:21Z mdb $
+//
+// Narya library - tools for developing networked games
+// Copyright (C) 2002-2004 Three Rings Design, Inc., All Rights Reserved
+// http://www.threerings.net/code/narya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library 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
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.miso.util;
+
+import com.threerings.miso.client.MisoScenePanel;
+
+/**
+ * Contains information on the configuration of a particular isometric
+ * view. The member data are public to facilitate convenient referencing
+ * by the {@link MisoScenePanel} class, the values should not be modified
+ * once the metrics are constructed.
+ */
+public class MisoSceneMetrics
+{
+    /** Tile dimensions and half-dimensions in the view. */
+    public int tilewid, tilehei, tilehwid, tilehhei;
+
+    /** Fine coordinate dimensions. */
+    public int finehwid, finehhei;
+
+    /** Number of fine coordinates on each axis within a tile. */
+    public int finegran;
+
+    /** Dimensions of our scene blocks in tile count. */
+    public short blockwid = 4, blockhei = 4;
+
+    /** The length of a tile edge in pixels. */
+    public float tilelen;
+
+    /** The slope of the x- and y-axis lines. */
+    public float slopeX, slopeY;
+
+    /** The length between fine coordinates in pixels. */
+    public float finelen;
+
+    /** The y-intercept of the x-axis line within a tile. */
+    public float fineBX;
+
+    /** The slope of the x- and y-axis lines within a tile. */
+    public float fineSlopeX, fineSlopeY;
+
+    /**
+     * Constructs scene metrics by directly specifying the desired config
+     * parameters.
+     *
+     * @param tilewid the width in pixels of the tiles.
+     * @param tilehei the height in pixels of the tiles.
+     * @param finegran the number of sub-tile divisions to use for fine
+     * coordinates.
+     */
+    public MisoSceneMetrics (int tilewid, int tilehei, int finegran)
+    {
+        // keep track of this stuff
+        this.tilewid = tilewid;
+        this.tilehei = tilehei;
+        this.finegran = finegran;
+
+        // halve the dimensions
+        tilehwid = (tilewid / 2);
+        tilehhei = (tilehei / 2);
+
+        // calculate the length of a tile edge in pixels
+        tilelen = (float) Math.sqrt(
+            (tilehwid * tilehwid) + (tilehhei * tilehhei));
+
+        // calculate the slope of the x- and y-axis lines
+        slopeX = (float)tilehei / (float)tilewid;
+        slopeY = -slopeX;
+
+	// calculate the edge length separating each fine coordinate
+	finelen = tilelen / (float)finegran;
+
+	// calculate the fine-coordinate x-axis line
+	fineSlopeX = (float)tilehei / (float)tilewid;
+	fineBX = -(fineSlopeX * (float)tilehwid);
+	fineSlopeY = -fineSlopeX;
+
+	// calculate the fine coordinate dimensions
+	finehwid = (int)((float)tilehwid / (float)finegran);
+	finehhei = (int)((float)tilehhei / (float)finegran);
+    }
+}