Initial checkin of the Minimal Scene Graph (MSG) library, intentended

for experimentation with both 3D and 2D/3D interaction.


git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/joglutils/trunk@44 83d24430-9974-4f80-8418-2cc3294053b9

1 files changed, 184 insertions, 0 deletions

diff --git a/src/net/java/joglutils/msg/math/Vec2f.java b/src/net/java/joglutils/msg/math/Vec2f.java
new file mode 100644
index 0000000..a50338d
--- /dev/null
+++ b/src/net/java/joglutils/msg/math/Vec2f.java
@@ -0,0 +1,184 @@
+/*
+ * Copyright (c) 2007 Sun Microsystems, Inc. All Rights Reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * 
+ * - Redistribution of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * 
+ * - Redistribution 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 Sun Microsystems, Inc. or the names of
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ * 
+ * This software is provided "AS IS," without a warranty of any kind. ALL
+ * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
+ * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
+ * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
+ * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
+ * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
+ * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
+ * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
+ * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
+ * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
+ * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
+ * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+ * 
+ * You acknowledge that this software is not designed or intended for use
+ * in the design, construction, operation or maintenance of any nuclear
+ * facility.
+ * 
+ */
+
+package net.java.joglutils.msg.math;
+
+/** 2-element single-precision vector */
+
+public class Vec2f {
+  private float x;
+  private float y;
+
+  public Vec2f() {}
+
+  public Vec2f(Vec2f arg) {
+    this(arg.x, arg.y);
+  }
+
+  public Vec2f(float x, float y) {
+    set(x, y);
+  }
+
+  public Vec2f copy() {
+    return new Vec2f(this);
+  }
+
+  public void set(Vec2f arg) {
+    set(arg.x, arg.y);
+  }
+
+  public void set(float x, float y) {
+    this.x = x;
+    this.y = y;
+  }
+
+  /** Sets the ith component, 0 <= i < 2 */
+  public void set(int i, float val) {
+    switch (i) {
+    case 0: x = val; break;
+    case 1: y = val; break;
+    default: throw new IndexOutOfBoundsException();
+    }
+  }
+
+  /** Gets the ith component, 0 <= i < 2 */
+  public float get(int i) {
+    switch (i) {
+    case 0: return x;
+    case 1: return y;
+    default: throw new IndexOutOfBoundsException();
+    }
+  }
+
+  public float x() { return x; }
+  public float y() { return y; }
+
+  public void setX(float x) { this.x = x; }
+  public void setY(float y) { this.y = y; }
+
+  public float dot(Vec2f arg) {
+    return x * arg.x + y * arg.y;
+  }
+
+  public float length() {
+    return (float) Math.sqrt(lengthSquared());
+  }
+
+  public float lengthSquared() {
+    return this.dot(this);
+  }
+
+  public void normalize() {
+    float len = length();
+    if (len == 0.0f) return;
+    scale(1.0f / len);
+  }
+
+  /** Returns this * val; creates new vector */
+  public Vec2f times(float val) {
+    Vec2f tmp = new Vec2f(this);
+    tmp.scale(val);
+    return tmp;
+  }
+
+  /** this = this * val */
+  public void scale(float val) {
+    x *= val;
+    y *= val;
+  }
+
+  /** Returns this + arg; creates new vector */
+  public Vec2f plus(Vec2f arg) {
+    Vec2f tmp = new Vec2f();
+    tmp.add(this, arg);
+    return tmp;
+  }
+
+  /** this = this + b */
+  public void add(Vec2f b) {
+    add(this, b);
+  }
+
+  /** this = a + b */
+  public void add(Vec2f a, Vec2f b) {
+    x = a.x + b.x;
+    y = a.y + b.y;
+  }
+
+  /** Returns this + s * arg; creates new vector */
+  public Vec2f addScaled(float s, Vec2f arg) {
+    Vec2f tmp = new Vec2f();
+    tmp.addScaled(this, s, arg);
+    return tmp;
+  }
+
+  /** this = a + s * b */
+  public void addScaled(Vec2f a, float s, Vec2f b) {
+    x = a.x + s * b.x;
+    y = a.y + s * b.y;
+  }
+
+  /** Returns this - arg; creates new vector */
+  public Vec2f minus(Vec2f arg) {
+    Vec2f tmp = new Vec2f();
+    tmp.sub(this, arg);
+    return tmp;
+  }
+
+  /** this = this - b */
+  public void sub(Vec2f b) {
+    sub(this, b);
+  }
+
+  /** this = a - b */
+  public void sub(Vec2f a, Vec2f b) {
+    x = a.x - b.x;
+    y = a.y - b.y;
+  }
+
+  public Vecf toVecf() {
+    Vecf out = new Vecf(2);
+    for (int i = 0; i < 2; i++) {
+      out.set(i, get(i));
+    }
+    return out;
+  }
+
+  public String toString() {
+    return "(" + x + ", " + y + ")";
+  }
+}