summaryrefslogtreecommitdiffstats
path: root/www
diff options
context:
space:
mode:
authorathomas <[email protected]>2003-06-29 04:07:03 +0000
committerathomas <[email protected]>2003-06-29 04:07:03 +0000
commitda8d0035ab293f5e10bef611465c446e35a6b31e (patch)
tree7121aa1231de565e982cf6fa16f907bb7b00b9df /www
parent8bf2b32da563ce906ffce971d9bfb803ff9559e0 (diff)
check-in of lesson 3
git-svn-id: file:///home/mbien/NetBeansProjects/JOGAMP/joal-sync/svn-server-sync-demos/joal-demos/trunk@25 235fdd13-0e8c-4fed-b5ee-0a390d04b286
Diffstat (limited to 'www')
-rw-r--r--www/devmaster/lesson3.html294
-rw-r--r--www/devmaster/lesson3.zipbin0 -> 313641 bytes
-rw-r--r--www/index.html2
3 files changed, 296 insertions, 0 deletions
diff --git a/www/devmaster/lesson3.html b/www/devmaster/lesson3.html
new file mode 100644
index 0000000..e3a6d90
--- /dev/null
+++ b/www/devmaster/lesson3.html
@@ -0,0 +1,294 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+<html>
+<head>
+ <title>DevMaster.net Game Development</title>
+</head>
+<body><div align="center">
+
+<IMG SRC="http://games.dev.java.net/images/navbar.gif" WIDTH=454 HEIGHT=43 BORDER=0 ALT="" USEMAP="#navbar_Map"></div>
+<MAP NAME="navbar_Map">
+<AREA SHAPE="rect" ALT="Wiki" COORDS="340,0,386,43" HREF="http://wiki.java.net/bin/view/Games">
+<AREA SHAPE="rect" ALT="Weblogs" COORDS="286,0,339,43" HREF="http://weblogs.java.net/weblogs/project/games">
+<AREA SHAPE="rect" ALT="Forums" COORDS="216,0,285,43" HREF="http://games.dev.java.net/forums">
+<AREA SHAPE="rect" ALT="JavaGames Home" COORDS="91,0,215,43" HREF="http://community.java.net/games">
+<AREA SHAPE="rect" ALT="www.java.net" COORDS="1,1,91,44" HREF="http://www.java.net" TARGET="_self">
+</MAP>
+<br>
+OpenAL Tutorials from DevMaster.net. Reprinted with Permission.<br>
+<br>
+
+<table border="0" cellspacing="0" style="border-collapse: collapse" width="100%" cellpadding="0" id="AutoNumber1" height="12" bgcolor="#666699">
+ <tr>
+ <td width="47%" height="12" valign="middle"><p><b><font color="#FFFFFF">OpenAL
+ Tutorials</font></b></p></td>
+ <td width="53%" height="12" align="right" valign="middle"><p align="right"><a href="http://devmaster.net/"><font color="#66FF99">DevMaster.net</font></a></p></td>
+ </tr>
+ </table>
+
+<p class="ArticleTitle"><font size="5">Multiple Sources<br>
+ </font><font size="4"><strong>Lesson 3</strong></font></p>
+
+<p align="right" class="ArticleAuthor">Author: <a href="mailto:[email protected]">Jesse
+ Maurais</a><br>
+ Adapted for Java by: <a href="mailto:[email protected]">Athomas Goldberg</a></p>
+<p align="justify">Hello. It's been a while since my last tutorial. But better
+ late than never I guess. Since I'm sure your all impatient to read the latest
+ tutorial, I'll just jump right into it. What we hope to accomplish with this
+ one is to be able to play more that one audio sample at a time. Very intense
+ games have all kinds of stuff going on usually involving different sound clips.
+ It won't be hard to implement any of this though. Doing multiple sounds is similar
+ to doing just one.</p>
+
+<pre>
+
+<font color="#0000FF">import</font> java.nio.ByteBuffer;
+<font color="#0000FF">import</font> java.util.Random;
+
+<font color="#0000FF">import</font> net.java.games.joal.AL;
+<font color="#0000FF">import</font> net.java.games.joal.ALFactory;
+<font color="#0000FF">import</font> net.java.games.joal.util.ALut;
+
+<font color="#0000FF">public</font> <font color="#0000FF">class</font> MultipleSources {
+
+ <font color="#0000FF">static</font> AL al;
+
+ <font color="#006600">// Maximum number of buffers we will need.</font>
+ <font color="#0000FF">static</font> <font color="#0000FF">final</font> <font color="#0000FF">int</font> NUM_BUFFERS = 3;
+
+ <font color="#006600">// Maximum emissions we will need.</font>
+ <font color="#0000FF">static</font> <font color="#0000FF">final</font> <font color="#0000FF">int</font> NUM_SOURCES = 3;
+
+ <font color="#006600">// These index the buffers and sources</font>
+ <font color="#0000FF">static</font> <font color="#0000FF">final</font> <font color="#0000FF">int</font> BATTLE = 0;
+ <font color="#0000FF">static</font> <font color="#0000FF">final</font> <font color="#0000FF">int</font> GUN1 = 1;
+ <font color="#0000FF">static</font> <font color="#0000FF">final</font> <font color="#0000FF">int</font> GUN2 = 2;
+
+ <font color="#006600">// Buffers hold sound data</font>
+ <font color="#0000FF">static</font> <font color="#0000FF">int</font>[] buffers = <font color="#0000FF">new</font> <font color="#0000FF">int</font>[NUM_BUFFERS];
+
+ <font color="#006600">// Sources are points of emitting sound</font>
+ <font color="#0000FF">static</font> <font color="#0000FF">int</font>[] sources = <font color="#0000FF">new</font> <font color="#0000FF">int</font>[NUM_SOURCES];
+
+ <font color="#006600">// Position of the source sounds.</font>
+ <font color="#0000FF">static</font> <font color="#0000FF">float</font>[][] sourcePos = <font color="#0000FF">new</font> <font color="#0000FF">float</font>[NUM_SOURCES][3];
+
+ <font color="#006600">// Velocity of the source sounds</font>
+ <font color="#0000FF">static</font> <font color="#0000FF">float</font>[][] sourceVel = <font color="#0000FF">new</font> <font color="#0000FF">float</font>[NUM_SOURCES][3];
+
+ <font color="#006600">// Position of the listener</font>.
+ <font color="#0000FF">static</font> <font color="#0000FF">float</font>[] listenerPos = { 0.0f, 0.0f, 0.0f };
+
+ <font color="#006600">// Velocity of the listener.</font>
+ <font color="#0000FF">static</font> <font color="#0000FF">float</font>[] listenerVel = { 0.0f, 0.0f, 0.0f };
+
+ <font color="#006600">// Orientation of the listener. (first 3 elements are "at", second 3 are "up")</font>
+ <font color="#0000FF">static</font> <font color="#0000FF">float</font>[] listenerOri = { 0.0f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f };
+</pre>
+<p align="justify">I guess this little piece of source code will be familiar to
+ a lot of you who've read the first two tutorials. The only difference is that
+ we now have 3 different sound effects that we are going to load into the OpenAL
+ sound system.</p>
+
+<pre>
+
+ <font color="#0000FF">static</font> <font color="#0000FF">int</font> loadALData() {
+
+ <font color="#006600">//variables to load into</font>
+
+ <font color="#0000FF">int</font>[] format = <font color="#0000FF">new</font> <font color="#0000FF">int</font>[1];
+ <font color="#0000FF">int</font>[] size = <font color="#0000FF">new</font> <font color="#0000FF">int</font>[1];
+ ByteBuffer[] data = <font color="#0000FF">new</font> ByteBuffer[1];
+ <font color="#0000FF">int</font>[] freq = <font color="#0000FF">new</font> <font color="#0000FF">int</font>[1];
+ <font color="#0000FF">int</font>[] loop = <font color="#0000FF">new</font> <font color="#0000FF">int</font>[1];
+ <font color="#006600">
+ // load wav data into buffers</font>
+
+ al.alGenBuffers(NUM_BUFFERS, buffers);
+ <font color="#0000FF">if </font>(al.alGetError() != AL.AL_NO_ERROR) {
+ <font color="#0000FF">return</font> AL.AL_FALSE;
+ }
+
+ ALut.alutLoadWAVFile(
+ "wavdata/Battle.wav",
+ format,
+ data,
+ size,
+ freq,
+ loop);
+ al.alBufferData(
+ buffers[BATTLE],
+ format[0],
+ data[0],
+ size[0],
+ freq[0]);
+ ALut.alutUnloadWAV(format[0], data[0], size[0], freq[0]);
+
+ ALut.alutLoadWAVFile(
+ "wavdata/Gun1.wav",
+ format,
+ data,
+ size,
+ freq,
+ loop);
+ al.alBufferData(
+ buffers[GUN1],
+ format[0],
+ data[0],
+ size[0],
+ freq[0]);
+ ALut.alutUnloadWAV(format[0], data[0], size[0], freq[0]);
+
+ ALut.alutLoadWAVFile(
+ "wavdata/Gun2.wav",
+ format,
+ data,
+ size,
+ freq,
+ loop);
+ al.alBufferData(
+ buffers[GUN2],
+ format[0],
+ data[0],
+ size[0],
+ freq[0]);
+ ALut.alutUnloadWAV(format[0], data[0], size[0], freq[0]);
+
+<font color="#006600"> // bind buffers into audio sources</font>
+ al.alGenSources(NUM_SOURCES, sources);
+
+ al.alSourcei(sources[BATTLE], AL.AL_BUFFER, buffers[BATTLE]);
+ al.alSourcef(sources[BATTLE], AL.AL_PITCH, 1.0f);
+ al.alSourcef(sources[BATTLE], AL.AL_GAIN, 1.0f);
+ al.alSourcefv(sources[BATTLE], AL.AL_POSITION, sourcePos[BATTLE]);
+ al.alSourcefv(sources[BATTLE], AL.AL_POSITION, sourceVel[BATTLE]);
+ al.alSourcei(sources[BATTLE], AL.AL_LOOPING, AL.AL_TRUE);
+
+ al.alSourcei(sources[GUN1], AL.AL_BUFFER, buffers[GUN1]);
+ al.alSourcef(sources[GUN1], AL.AL_PITCH, 1.0f);
+ al.alSourcef(sources[GUN1], AL.AL_GAIN, 1.0f);
+ al.alSourcefv(sources[GUN1], AL.AL_POSITION, sourcePos[GUN1]);
+ al.alSourcefv(sources[GUN1], AL.AL_POSITION, sourceVel[GUN1]);
+ al.alSourcei(sources[GUN1], AL.AL_LOOPING, AL.AL_FALSE);
+
+ al.alSourcei(sources[GUN2], AL.AL_BUFFER, buffers[GUN2]);
+ al.alSourcef(sources[GUN2], AL.AL_PITCH, 1.0f);
+ al.alSourcef(sources[GUN2], AL.AL_GAIN, 1.0f);
+ al.alSourcefv(sources[GUN2], AL.AL_POSITION, sourcePos[GUN2]);
+ al.alSourcefv(sources[GUN2], AL.AL_POSITION, sourceVel[GUN2]);
+ al.alSourcei(sources[GUN2], AL.AL_LOOPING, AL.AL_FALSE);
+
+<font color="#006600"> // do another error check and return</font>
+ if (al.alGetError() != AL.AL_NO_ERROR) {
+ <font color="#0000FF">return</font> AL.AL_FALSE;
+ }
+
+ <font color="#0000FF">return</font> AL.AL_TRUE;
+ }
+
+</pre>
+<p align="justify">This code looks quite a bit different at first, but it isn't
+ really. Basically we load the file data into our 3 buffers, then lock the 3
+ buffers to our 3 sources relatively. The only other difference is that the &quot;Battle.wav&quot;
+ (Source index 0) is looping while the rest are not.</p>
+<pre>
+
+ <font color="#0000FF">static</font> <font color="#0000FF">void</font> setListenerValues() {
+ al.alListenerfv(AL.AL_POSITION, listenerPos);
+ al.alListenerfv(AL.AL_VELOCITY, listenerVel);
+ al.alListenerfv(AL.AL_ORIENTATION, listenerOri);
+ }
+
+ <font color="#0000FF">static</font> <font color="#0000FF">void</font> killAllData() {
+ al.alDeleteBuffers(NUM_BUFFERS, buffers);
+ al.alDeleteSources(NUM_SOURCES, sources);
+ ALut.alutExit();
+ }
+</pre>
+<p>I don't think we changed anything in this code.</p>
+
+<pre> <font color="#0000FF">public</font> <font color="#0000FF">static</font> <font color="#0000FF">void</font> main(String[] args) {
+ al = ALFactory.getAL();
+
+ <font color="#006600">// Initialize OpenAL and clear the error bit</font>
+
+ ALut.alutInit();
+ al.alGetError();
+
+ <font color="#006600">// Load the wav data.</font>
+
+ <font color="#0000FF">if</font>(loadALData() == AL.AL_FALSE) {
+ System.exit(1);
+ }
+ setListenerValues();
+
+ <font color="#006600"> // begin the battle sample to play</font>
+
+ al.alSourcePlay(sources[BATTLE]);
+ <font color="#0000FF">long</font> startTime = System.currentTimeMillis();
+ <font color="#0000FF">long</font> elapsed = 0;
+ <font color="#0000FF">long</font> totalElapsed = 0;
+ Random rand = new Random();
+ <font color="#0000FF">int</font>[] state = <font color="#0000FF">new</font> <font color="#0000FF">int</font>[1];
+ <font color="#0000FF">while</font> (totalElapsed < 10000) {
+ elapsed = System.currentTimeMillis() - startTime;
+ <font color="#0000FF">if</font> (elapsed > 50) {
+ totalElapsed += elapsed;
+ startTime = System.currentTimeMillis();
+
+ <font color="#006600">// pick one of the sources at random and check to see if it is playing.
+ // Skip the first source because it is looping anyway (will always be playing).</font>
+
+ <font color="#0000FF">int</font> pick = Math.abs((rand.nextInt()) % 2) + 1;
+ al.alGetSourcei(sources[pick], AL.AL_SOURCE_STATE, state);
+
+ <font color="#0000FF">if</font> (state[0] != AL.AL_PLAYING) {
+
+ <font color="#006600"> // pick a random position around the listener to play the source.</font>
+
+ <font color="#0000FF">double</font> theta = (rand.nextInt() % 360) * 3.14 / 180.0;
+ sourcePos[pick][0] = - ((<font color="#0000FF">float</font>) Math.cos(theta));
+ sourcePos[pick][1] = - ((<font color="#0000FF">float</font>) (rand.nextInt() % 2));
+ sourcePos[pick][2] = - ((<font color="#0000FF">float</font>) Math.sin(theta));
+
+ al.alSourcefv(
+ sources[pick],
+ AL.AL_POSITION,
+ sourcePos[pick]);
+
+ al.alSourcePlay(sources[pick]);
+ }
+ }
+ }
+ killAllData();
+ }
+}
+</pre>
+
+<p align="justify">Here is the interesting part of this tutorial. We go through
+ each of the sources to make sure it's playing. If it is not then we set it to
+ play but we select a new point in 3D space for it to play (just for kicks).
+</p>
+<p align="justify">And bang! We are done. As most of you have probably seen, you
+ don't have to do anything special to play more than one source at a time. OpenAL
+ will handle all the mixing features to get the sounds right for their respective
+ distances and velocities. And when it comes right down to it, isn't that the
+ beauty of OpenAL? </p>
+<p align="justify">You know that was a lot easier than I thought. I don't know
+ why I waited so long to write it. Anyway, if anyone reading wants to see something
+ specific in future tutorials (not necessarily pertaining to OpenAL, I have quite
+ an extensive knowledge base) drop me a line at <a href="mailto:[email protected]">[email protected]</a>
+ I plan to do tutorials on sharing buffers and the Doppler effect in some later
+ tutorial unless there is request for something else. Have fun with the code!</p>
+<p><a href="lesson3.zip">Download the Java
+ source and Ant build file</a></p>
+<table border="0" cellspacing="1" style="border-collapse: collapse" width="100%" id="AutoNumber2" bgcolor="#666699">
+ <tr>
+ <td width="40%"> <p dir="ltr"><font color="#FFFFFF" size="2">� 2003 DevMaster.net.
+ All rights reserved.</font></td>
+ <td width="60%"> <p align="right" dir="ltr"><font size="2"><a href="mailto:[email protected]">
+ <font color="#FFFFFF">Contact us</font></a><font color="#FFFFFF"> if you
+ want to write for us or for any comments, suggestions, or feedback.</font></font></td>
+ </tr>
+</table>
+</body>
+</html> \ No newline at end of file
diff --git a/www/devmaster/lesson3.zip b/www/devmaster/lesson3.zip
new file mode 100644
index 0000000..ae81626
--- /dev/null
+++ b/www/devmaster/lesson3.zip
Binary files differ
diff --git a/www/index.html b/www/index.html
index c003aab..76b55e3 100644
--- a/www/index.html
+++ b/www/index.html
@@ -98,6 +98,8 @@
Static Source</li>
<li><a href="devmaster/lesson2.html">lesson 2</a>: Looping
and Fadeaway</li>
+ <li><a href="devmaster/lesson2.html">lesson 3</a>: Multiple
+ Sources </li>
</ul>
</li>
</ul></td>
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-28 20:00:50 +0000