Added new DepthTest node class, with support from [GL]DepthTestElement. This provides an easy mechanism for disabling depth testing for a portion of the scene graph (useful when rendering alpha blended elements). Thanks to Ken Russell for suggesting this idea.

git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/joglutils/trunk@57 83d24430-9974-4f80-8418-2cc3294053b9

1 files changed, 70 insertions, 0 deletions

diff --git a/src/net/java/joglutils/msg/nodes/DepthTest.java b/src/net/java/joglutils/msg/nodes/DepthTest.java
new file mode 100644
index 0000000..7d3963f
--- /dev/null
+++ b/src/net/java/joglutils/msg/nodes/DepthTest.java
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+/*
+ * 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.nodes;
+
+import javax.media.opengl.*;
+
+import net.java.joglutils.msg.actions.*;
+import net.java.joglutils.msg.elements.*;
+
+/** Represents depth test state. */
+public class DepthTest extends Node {
+
+  private boolean enabled = true;
+
+  static {
+    // Enable the elements this node affects for known actions
+    GLDepthTestElement.enable(GLRenderAction.getDefaultState());
+  }
+
+  /** Sets whether depth testing is enabled. Defaults to true. */
+  public void setEnabled(boolean enabled) {
+    this.enabled = enabled;
+  }
+
+  /** Returns whether depth testing is enabled. Defaults to true. */
+  public boolean getEnabled() {
+    return enabled;
+  }
+
+  public void doAction(Action action) {
+    if (DepthTestElement.isEnabled(action.getState())) {
+      DepthTestElement.set(action.getState(), getEnabled());
+    }
+  }
+}
+