Changed how Texture returns texture coordinates for both the entire

image as well as a sub-image. Added TextureCoords class. Updated
TestTexture demo.


git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/trunk@520 232f8b59-042b-4e1e-8c03-345bb8c30851

1 files changed, 79 insertions, 0 deletions

diff --git a/src/classes/com/sun/opengl/utils/TextureCoords.java b/src/classes/com/sun/opengl/utils/TextureCoords.java
new file mode 100755
index 000000000..ec3760026
--- /dev/null
+++ b/src/classes/com/sun/opengl/utils/TextureCoords.java
@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2005 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 com.sun.opengl.utils;
+
+/** Specifies texture coordinates for a rectangular area of a
+    texture. Note that some textures are inherently flipped vertically
+    from OpenGL's standard coordinate system. This class takes care of
+    this vertical flip so that the "bottom" and "top" coordinates may
+    sometimes be reversed. From the point of view of code rendering
+    textured polygons, it can always map the bottom and left texture
+    coordinates from the TextureCoords to the lower left point of the
+    textured polygon and achieve correct results. */
+
+public class TextureCoords {
+  // These represent the lower-left point
+  private float left;
+  private float bottom;
+  // These represent the upper-right point
+  private float right;
+  private float top;
+
+  public TextureCoords(float left, float bottom,
+                       float right, float top) {
+    this.left = left;
+    this.bottom = bottom;
+    this.right = right;
+    this.top = top;
+  }
+
+  /** Returns the leftmost (x) texture coordinate of this
+      rectangle. */
+  public float left() { return left; }
+
+  /** Returns the rightmost (x) texture coordinate of this
+      rectangle. */
+  public float right() { return right; }
+
+  /** Returns the bottommost (y) texture coordinate of this
+      rectangle. */
+  public float bottom() { return bottom; }
+
+  /** Returns the topmost (y) texture coordinate of this
+      rectangle. */
+  public float top() { return top; }
+}