1 files changed, 126 insertions, 0 deletions
diff --git a/src/javax/media/j3d/SwitchState.java b/src/javax/media/j3d/SwitchState.java
new file mode 100644
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+++ b/src/javax/media/j3d/SwitchState.java
@@ -0,0 +1,126 @@
+/*
+ * Copyright 2001-2008 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code 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 General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+package javax.media.j3d;
+
+class SwitchState {
+    // a bitmask to track the composite switchOn state in a nested switch
+    // tree. A bit is set if a branch is switched off at the switch
+    // level specified by the position of the bit in the bitmask
+    // It is an array of long in order to support infinite deep nested
+    // switch tree
+    long compositeSwitchMask[] = new long[]{0};
+
+    // switchOn state cached in user thread
+    boolean cachedSwitchOn = true;
+
+    // switchOn state in current time, is true if compositeSwitchMask == 0
+    boolean currentSwitchOn = true;
+
+    // switchOn state in last time, is true if compositeSwitchMask == 0
+    boolean lastSwitchOn = true;
+
+    boolean initialized = false;
+
+    CachedTargets cachedTargets = null;
+
+    boolean inSwitch = false;
+
+    public SwitchState(boolean inSwitch) {
+        this.inSwitch = inSwitch;
+        initialized = !inSwitch;
+    }
+
+    void dump() {
+	System.err.println(
+	                   " MASK " + compositeSwitchMask[0] +
+	                   " CACH " + cachedSwitchOn +
+	                   " CURR " + currentSwitchOn +
+			   " LAST " + lastSwitchOn);
+    }
+
+    void updateCompositeSwitchMask(int switchLevel, boolean switchOn) {
+        if (switchLevel < 64) {
+            if (switchOn) {
+                compositeSwitchMask[0] &= ~(1 << switchLevel);
+            } else {
+                compositeSwitchMask[0] |= (1 << switchLevel);
+            }
+        } else {
+            int i;
+            int index = switchLevel/64;
+            int offset = switchLevel%64;
+
+            if (index > compositeSwitchMask.length) {
+                long newCompositeSwitchMask[] = new long[index+1];
+                System.arraycopy(compositeSwitchMask, 0,
+                                newCompositeSwitchMask, 0, index);
+                compositeSwitchMask = newCompositeSwitchMask;
+            }
+            if (switchOn) {
+                compositeSwitchMask[index] &= ~(1 << offset);
+            } else {
+                compositeSwitchMask[index] |= (1 << offset);
+            }
+        }
+    }
+
+    void initSwitchOn() {
+	boolean switchOn = evalCompositeSwitchOn();
+        currentSwitchOn = lastSwitchOn = cachedSwitchOn = switchOn;
+        //currentSwitchOn = cachedSwitchOn = switchOn;
+	initialized = true;
+    }
+
+    void updateCurrentSwitchOn() {
+        currentSwitchOn = !currentSwitchOn;
+    }
+
+    void updateLastSwitchOn() {
+        lastSwitchOn = currentSwitchOn;
+    }
+
+    void updateCachedSwitchOn() {
+        cachedSwitchOn = !cachedSwitchOn;
+    }
+
+    boolean evalCompositeSwitchOn() {
+        boolean switchOn;
+        if (compositeSwitchMask.length == 1) {
+            switchOn = (compositeSwitchMask[0] == 0);
+        } else {
+            switchOn = true;
+            for (int i=0; i<compositeSwitchMask.length; i++) {
+                if (compositeSwitchMask[i] != 0) {
+                    switchOn = false;
+                    break;
+                }
+            }
+        }
+	return switchOn;
+    }
+}
+