1 files changed, 126 insertions, 0 deletions
diff --git a/jeu-test/Lemmini/0.84/src/Tools/MicrosecondTimer.java b/jeu-test/Lemmini/0.84/src/Tools/MicrosecondTimer.java
new file mode 100644
index 0000000..261ad86
--- /dev/null
+++ b/jeu-test/Lemmini/0.84/src/Tools/MicrosecondTimer.java
@@ -0,0 +1,126 @@
+package Tools;
+
+/*
+ * Copyright 2009 Volker Oth
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * Wrapper class for direct timer access. Implements a microsecond timer.
+ *
+ * @author Volker Oth
+ */
+public class MicrosecondTimer {
+
+	private long timeBase;
+
+	/**
+	 * Constructor.
+	 */
+	public MicrosecondTimer() {
+		timeBase = System.nanoTime()/1000;
+	}
+
+	/**
+	 * Return delta time since last update.
+	 * @return delta time since last update.
+	 */
+	public long delta() {
+		long t = System.nanoTime()/1000;
+		long delta = t - timeBase;
+		// check for inconsistency: external clock setting (e.g. to internet server)
+		// might cause t to jump "back" in time
+		if (delta < 0) {
+			System.out.println("MicrosecondTimer inconsistency detected: "+(-delta)+"us");
+			timeBase = t;
+			delta = 0;
+		}
+		return delta;
+	}
+
+	/**
+	 * Return delta time since last update and perform an update.
+	 * @return delta time since last update.
+	 */
+	public long deltaUpdate() {
+		long t = System.nanoTime()/1000;
+		long delta = t - timeBase;
+		// check for inconsistency: external clock setting (e.g. to internet server)
+		// might cause t to jump "back" in time
+		if (delta < 0) {
+			System.out.println("MicrosecondTimer inconsistency detected: "+(-delta)+"us");
+			delta = 0;
+		}
+		timeBase = t;
+		return delta;
+	}
+
+	/**
+	 * Returns true if the given time has passed since the last update.
+	 * @param dt time delta in microseconds
+	 * @return true if the given time has passed since the last update.
+	 */
+	public boolean timePassed(final long dt) {
+		long delta = delta();
+		if (delta>=dt)
+			return true;
+		return false;
+	}
+
+	/**
+	 * Returns true if the given time has passed since the last update and performs an update.
+	 * @param dt time delta in microseconds
+	 * @return true if the given time has passed since the last update.
+	 */
+	public boolean timePassedUpdate(final long dt) {
+		long t = System.nanoTime()/1000;
+		long delta = delta();
+		if (delta>=dt) {
+			timeBase = t;
+			return true;
+		}
+		return false;
+	}
+
+	/**
+	 * Returns true if the given time has passed since the last update and adds the time delta.
+	 * @param dt time delta
+	 * @return true if the given time has passed since the last update.
+	 */
+	public boolean timePassedAdd(final long dt) {
+		long delta = delta();
+		if (delta>=dt) {
+			timeBase+= dt;
+			return true;
+		}
+		return false;
+	}
+
+	/**
+	 * Updates the internal time base to the current timer value.
+	 */
+	public void update() {
+		long t = System.nanoTime()/1000;
+		timeBase = t;
+	}
+
+	/**
+	 * Adds a time delta to the internal time base.
+	 * @param delta time delta in microseconds
+	 */
+	public void update(long delta) {
+		timeBase += delta;
+	}
+
+}