Help with setting_up_eclipse_to_build_jme please

Trip · December 29, 2007, 8:35pm

Hi there,

I'm new to jME, hello all and I am relatively new to java, I have some extensive scripting background in PHP and AJAX and wish to try my hand at Java, so need a little hand holding.

I need some help resolving an error I keep getting after I have followed all the steps in 'setting_up_eclipse_to_build_jme' from http://www.jmonkeyengine.com/wiki/doku.php?id=setting_up_eclipse_to_build_jme

I have eclipse, (Version: 3.3.1.1) and I am using jre1.6.0_03 and jdk1.6.0_03 (or at least I hope I am).

I got to 'Run test' which asks you to run jmetest.renderer package TestTeapot.java when I do this it displays the following error…

29-Dec-2007 20:14:54 com.jme.app.BaseGame start INFO: Application started. 29-Dec-2007 20:14:54 com.jme.system.PropertiesIO <init> INFO: PropertiesIO created 29-Dec-2007 20:14:54 com.jme.system.PropertiesIO load WARNING: Could not load properties. Creating a new one.

Can anyone tell me what this error is and how to get rid of it?

TIA

Trippy :)

Trip · December 29, 2007, 9:43pm

Thanks for your reply, that makes sense.

I get the display up fine, however no matter which options I choose for the screen settings it fails to start. I have the error message for that aswell.

29-Dec-2007 21:42:11 com.jme.app.BaseGame start INFO: Application started. 29-Dec-2007 21:42:11 com.jme.system.PropertiesIO <init> INFO: PropertiesIO created 29-Dec-2007 21:42:11 com.jme.system.PropertiesIO load INFO: Read properties 29-Dec-2007 21:42:26 com.jme.input.joystick.DummyJoystickInput <init> INFO: Joystick support is disabled 29-Dec-2007 21:42:26 com.jme.system.lwjgl.LWJGLDisplaySystem <init> INFO: LWJGL Display System created. 29-Dec-2007 21:42:26 com.jme.system.lwjgl.LWJGLDisplaySystem getValidDisplayMode INFO: Selected DisplayMode: 1024 x 768 x 32 @75Hz 29-Dec-2007 21:42:26 com.jme.system.PropertiesIO save INFO: Saved properties 29-Dec-2007 21:42:26 com.jme.app.BaseSimpleGame initSystem INFO: jME version 1.0 29-Dec-2007 21:42:27 com.jme.system.lwjgl.LWJGLDisplaySystem getValidDisplayMode INFO: Selected DisplayMode: 1024 x 768 x 32 @75Hz 29-Dec-2007 21:42:27 com.jme.system.lwjgl.LWJGLDisplaySystem initDisplay SEVERE: Cannot create window 29-Dec-2007 21:42:27 class com.jme.system.lwjgl.LWJGLDisplaySystem initDisplay() SEVERE: Exception org.lwjgl.LWJGLException: Could not find a valid pixel format at org.lwjgl.opengl.WindowsPeerInfo.nChoosePixelFormat(Native Method) at org.lwjgl.opengl.WindowsPeerInfo.choosePixelFormat(WindowsPeerInfo.java:52) at org.lwjgl.opengl.WindowsDisplayPeerInfo.initDC(WindowsDisplayPeerInfo.java:54) at org.lwjgl.opengl.WindowsDisplay.createWindow(WindowsDisplay.java:150) at org.lwjgl.opengl.Display.createWindow(Display.java:260) at org.lwjgl.opengl.Display.create(Display.java:742) at org.lwjgl.opengl.Display.create(Display.java:694) at com.jme.system.lwjgl.LWJGLDisplaySystem.initDisplay(LWJGLDisplaySystem.java:437) at com.jme.system.lwjgl.LWJGLDisplaySystem.createWindow(LWJGLDisplaySystem.java:143) at com.jme.app.BaseSimpleGame.initSystem(BaseSimpleGame.java:341) at com.jme.app.BaseGame.start(BaseGame.java:65) at jmetest.renderer.TestTeapot.main(TestTeapot.java:61) 29-Dec-2007 21:42:27 com.jme.app.BaseSimpleGame initSystem SEVERE: Could not create displaySystem com.jme.system.JmeException: Cannot create window: Could not find a valid pixel format at com.jme.system.lwjgl.LWJGLDisplaySystem.initDisplay(LWJGLDisplaySystem.java:450) at com.jme.system.lwjgl.LWJGLDisplaySystem.createWindow(LWJGLDisplaySystem.java:143) at com.jme.app.BaseSimpleGame.initSystem(BaseSimpleGame.java:341) at com.jme.app.BaseGame.start(BaseGame.java:65) at jmetest.renderer.TestTeapot.main(TestTeapot.java:61)

Any ideas?

thanks, Trip

darkfrog · December 29, 2007, 9:30pm

That's not an error, just a warning…does nothing display?

Momoko_Fan · December 30, 2007, 12:36am

Try downloading the latest drivers for your card.

darkfrog · December 30, 2007, 1:08am

Also, try telling it to display in a window and see if that makes a difference.

Trip · December 30, 2007, 5:02am

ok thanks I will try the graphics card drivers, I have already tried the open in window option and it gives me the same errors as above.

How is it that all 3d java games that I have used in the past don't have the graphics driver issue, how do they go about this?

tia

Trip

Momoko_Fan · December 30, 2007, 4:10pm

Those games probably use software rendering.

Trip · December 30, 2007, 5:57pm

Ah ok, thanks, just looking it up, never heard of that before. This may mean a slight change in direction for me.

Does jME support software rendering, or do you know of an engine that does? I am trying to create a java applet game but I do not wish to have any user hardware issues such as graphics drivers, opengl 1.1 vs 2.0 etc.

thanks so much for your help so far.

Trip

darkfrog · December 30, 2007, 9:17pm

jME wraps around LWJGL and it does support software rendering, it's just not engaged by default.

Trip · January 4, 2008, 6:58pm

Thanks darkfrog,

Is it an easy thing to enable? and is there any documentation on how to do it that you could point me to?

darkfrog · January 4, 2008, 8:37pm

Add this to your VM args:

-Dorg.lwjgl.opengl.Display.allowSoftwareOpenGL=true

Trip · January 4, 2008, 8:41pm

Wow is that it?

So what exactly does this do, does it literally just switch from graphics card rendering to software rendering as simple as that? Where does it pull it's GL resources from? (I'm assuming that the graphics card GL libs are different from the processors, or am I barking up the wrong tree?)

Momoko_Fan · January 5, 2008, 12:07am

Not sure about linux and mac, but windows has a software GL implementor called "GDI Generic" which is used to emulate rendering through software. It is severely limited though, most OpenGL features are not supported, only OpenGL 1.1 and a small part of 1.2.

Generally if software rendering is crucial to your application then it is probably preferable to implement it yourself so that it fits your needs and provides maximum performance.

Trip · January 5, 2008, 8:55am

Thats useful to know. By implementing it yourself does that mean I need to load OpenGL onto the users computer or do you compile it in with Java?

Momoko_Fan · January 5, 2008, 3:59pm

You make your own software renderer, not affiliated in any way with OpenGL.

I suggest you do some research about this before you start doing anything, also please be aware that 3D graphics are very limited outside of hardware support, if you're making a 3D game, prepare to make many compromises in terms of graphics quality.

Trip · January 5, 2008, 6:47pm

So in essence, I would need to recreate my own version of OpenGL and build it in with the game?