LWJGL Forum

First, thanks for this great library.

I have learned OpenGL by reading the Redbook (OpenGL Programming Guide). Since theory is nothing without practice, I have implemented its examples with the LWJGL in Java. The examples from the book are very helpful in my opinion and answer many of the questions I've seen around here.

I am done with all chapters and made them available for download along with some more information here:
http://ciardhubh.de/node/13 (http://ciardhubh.de/node/13)

This is probably interesting for anybody who wants to learn OpenGL with the help of this book and the LWJGL, too. Whether you just want to see the examples running or whether you want to see how you can get the desired effect in Java, this might be a help.

The code is based on the 2nd version of the book and LWJGL 2.

An older version (1.1) of the book can be found here for free: http://www.glprogramming.com/red/
The original C source code can be found here: http://www.opengl.org/resources/code/samples/redbook/

I also wrote a small launcher application to conveniently pick and run examples. It includes all libraries and no setup is required:
(http://ciardhubh.de/images/lwjgl_examples_launcher.png)

Here is a list of the examples which includes a topic for each example, for those without the book:

Example	Implemented	Part Of	Original File	Topic	Note
1-1	no	1-2		Hello World
1-2	yes		hello.c	Hello World
1-3	yes		double.c	Double Buffering
2-1	no	1-3		Viewport Setup
2-2	no			Use of glVertex*()	Only a collection of code snippets.
2-3	yes			Primitive Drawing
2-4	yes			Primitive Drawing
2-5	yes		lines.c	Line Stippling
2-6	yes		polys.c	Polygon Stippling
2-7	yes			Edge Marking
2-8	no			Surface Normals	Minimal code snippet without any data.
2-9	yes		varray.c	Vertex Arrays
2-10	no	2-9		Vertex Arrays
2-11	yes			Vertex Arrays
2-12	no	2-11		Vertex Arrays
2-13	no	2-11		Vertex Arrays
2-14	no			Vertex Arrays	glMultiDrawElements() does not exist in LWJGL
2-15	no			Vertex Arrays
2-16	yes			Vertex Array Buffers
2-17	yes			Vertex Array Buffers
2-18	no	2-17		Vertex Array Buffers
2-19	no	2-17		Vertex Array Buffers
2-20	yes			Surface Subdivision
2-21	no	2-20		Surface Subdivision
2-22	no			Surface Subdivision	Vital helper functions are missing.
3-1	yes		cube.c	Modelling Transformation
3-2	yes		model.c	Modelling Transformation
3-3	no			Projection Transformation	Vital helper functions are missing.
3-4	yes			Matrix Stack
3-5	yes		clip.c	Clipping Planes
3-6	yes		planet.c	Transformation Composition
3-7	yes		robot.c	Transformation Composition
3-8	yes		unproject.c	Reverse Projection
4-1	yes		smooth.c	Shading Model
5-1	yes		light.c	Lighting
5-2	no	5-1		Lighting
5-3	yes			Lighting
5-4	no	5-1		Lighting
5-5	yes			Lighting
5-6	yes		movelight.c	Lighting
5-7	yes			Lighting
5-8	yes		material.c	Lighting and Materials
5-9	yes		colormat.c	Lighting and Materials
6-1	yes		blendeqn.c	Blending
6-2	yes		alpha.c	Blending
6-3	yes		alpha3D.c	Blending
6-4	yes		aargb.c	Antialiasing
6-5	no		aaindex.c	Anti-aliasing	glutSetColor() is missing in the LWJGL.
6-6	yes		multisamp.c	Anti-aliasing
6-7	yes		fog.c	Fog
6-8	no		fogindex.c	Fog	glutSetColor() is missing in the LWJGL.
6-9	yes		fogcoord.c	Fog
6-10	yes		pointp.c	Point Parameters
6-11	yes		polyoff.c	Polygon Offset
7-1	yes		torus.c	Display Lists
7-2	yes		list.c	Display Lists
7-3	yes			Display Lists
7-4	no	7-5		Display Lists
7-5	yes		stroke.c	Display Lists
7-6	no	7-8		Display Lists
7-7	no	7-8		Display Lists
7-8	yes			Display Lists
7-9	yes			Display Lists
8-1	yes		drawf.c	Bitmap Font
8-2	yes		font.c	Bitmap Font
8-3	yes		image.c	Use of glDrawPixels()
8-4	no	8-3		Use of glDrawPixels()
8-5	yes		colortable.c	Colour Table
8-6	yes		convolution.c	Convolution Filters:
8-7	yes		colormatix.c	Colour Replacement
8-8	yes		histogram.c	Histogram
8-9	yes		minmax.c	Min-Max Pixel Values
9-1	yes		checker.c	Texturing
9-2	yes			Texturing
9-3	yes		texsub.c	Texturing
9-4	yes		texture3d.c	3D Texturing
9-5	yes		mipmap.c	Mipmaps
9-6	yes			Mipmaps
9-7	yes		texbind.c	Texture Objects
9-8	yes		texgen.c	Texture-Coordinate Generation
9-9	yes		cubemap.c	Cubemap
9-10	yes		multitex.c	Multi-Texturing
9-11	no	9-10		Multi-Texturing
9-12	no	9-10		Multi-Texturing
9-13	no	9-16		Combiner Functions
9-14	no	9-16		Combiner Functions
9-15	no	9-16		Combiner Functions
9-16	yes		combiner.c	Combiner Functions
9-17	yes		shadowmap.c	Shadow Mapping
9-18	no	9-17	shadowmap.c	Shadow Mapping
9-19	no	9-17	shadowmap.c	Shadow Mapping
10-1	yes		stencil.c	Stencil Test
10-2	yes			Occlusion Query
10-3	no	10-2		Occlusion Query
10-4	yes		accpersp.c	Scene Anti-alising
10-5	no	10-4	accpersp.c	Scene Anti-alising
10-6	yes		accanti.c	Scene Anti-alising
10-7	yes		dof.c	Depth of Field
11-1	no		tess.c	Tesselation	GLU tesselation is not supported by LWJGL.
11-2	no		tess.c	Tesselation	GLU tesselation is not supported by LWJGL.
11-3	no		tess.c	Tesselation	GLU tesselation is not supported by LWJGL.
11-4	yes		quadric.c	Quadrics
12-1	yes		bezcurve.c	Bezier Functions
12-2	yes		bezsurf.c	Bezier Functions
12-3	yes		bezmesh.c	Bezier Functions
12-4	yes		texturesurf.c	Bezier Functions
12-5	no		surface.c	NURBS	GLU NURBS are not supported by LWJGL.
12-6	no		surfpoints.c	NURBS	GLU NURBS are not supported by LWJGL.
12-7	no		surfpoints.c	NURBS	GLU NURBS are not supported by LWJGL.
12-8	no		trim.c	NURBS	GLU NURBS are not supported by LWJGL.
13-1	no	13-2		Name Stack
13-2	yes		select.c	Selection Mode
13-3	yes		picksquare.c	Picking
13-4	yes			Multiple Names
13-5	no	13-4		Multiple Names
13-6	yes		pickdepth.c	Picking with Depth Values
13-7	yes		feedback.c	Feedback Mode
14-1	yes			Error Handling
14-2	yes			Querying Extension Capabilities	Replaced 14-2 code with gluCheckExtension().
14-3	no			WGL Extension Location	Not supported by LWJGL
15-1	yes			Point Sprite
15-2	no	0-2		OpenGL Shading Language	OpenGL 2 version in 0-2 (instead of ARB extension)
15-3	no	0-2		OpenGL Shading Language	OpenGL 2 version in 0-2 (instead of ARB extension)
15-4	no			OpenGL Shading Language	Incomplete code snippet
15-5	no			OpenGL Shading Language	Incomplete code snippet
15-6	no			OpenGL Shading Language	Incomplete code snippet
15-7	no			OpenGL Shading Language	Incomplete code snippet
0-1	yes			Accumulation Buffer Motion Blur
0-2	yes			Simple GLSL vertex and fragment shaders

Download
Source: http://ciardhubh.de/download/lwjgl_redbook_examples_src_2009-01-26.zip
Executable with launcher (requires Java 6): http://ciardhubh.de/download/lwjgl_redbook_examples_bin_2009-01-26.zip

Any feedback - whether you think they are useful or not, hard/easy to understand, etc. - is appreciated.

Added examples of chapter 8 and chapter 9.

Edit:
Finished chapter 9.

Edit2:
Added example 8-6, which is finally working.

This looks great (haven't worked through it yet, though). Thanks!

i think there is an error on 9_17 dont know if its my card or not (ATI radeon x1400)

(http://users.on.net/~bobjob/temp.JPG)

Quote from: bobjob on September 22, 2008, 00:29:42
i think there is an error on 9_17 dont know if its my card or not (ATI radeon x1400)
...

That's how it looks on my computer, too. It's probably not intended to look this way, but there is no screenshot on the original examples' site of this particular example and I don't have the time to set up the tools to compile the C example myself.

I assume that there is a problem with depth values when the texture is applied. I'm basically doing the same things as in the original example, though. So I'm not quite sure where the problem lies. Maybe I did something wrong or it's another bug in the original. If anybody has any hints I'd be happy to know.

Awesome job,
your work is highly appreciated,
Thanks.

Quote from: blingo on October 17, 2008, 23:00:14
Awesome job,
your work is highly appreciated,
Thanks.

Thank you, I'm glad somebody likes it ;D

I just updated the examples. Chapters 10 to 13 are now included. There's also a new launcher, so you don't have to set up libraries and manually run each example.

Hi~ thanks your Demo ,but i got some problem on it

In your Example 3-6 the plant need to run by hand

         if (eventKey == Keyboard.KEY_D && Keyboard.isKeyDown(Keyboard.KEY_D)) {
                if (Keyboard.isKeyDown(Keyboard.KEY_LSHIFT) ||
                        Keyboard.isKeyDown(Keyboard.KEY_RSHIFT)) {
                    day = (day - 10) % 360;
                } else {
                    day = (day + 10) % 360;
                }
            }
...etc

and i want the plant run by itself 
this is my code:

    protected void logic(long timeDelta) {
       day = (day + 10) % 360;
       year = (year + 5) % 360;
    }

the Base class had been set

   protected void run() {
        while (!Keyboard.isKeyDown(Keyboard.KEY_ESCAPE) && !Display.isCloseRequested()) {
            now = System.currentTimeMillis();
            timeDelta = now - lastTime;
            lastTime = now;
            if (Display.isVisible()) {
                logic(timeDelta);
                render();
            } else {
                if (Display.isDirty()) {
                    render();
                }
                try {
                    Thread.sleep(500);
                } catch (InterruptedException ex) {
                }
            }
            Display.update();
        }
    }

but it's don't work.... plant run so fast...

i also check the FullScreenWindowedTest (http://lwjgl.org/demos.php)

      while (!Keyboard.isKeyDown(Keyboard.KEY_ESCAPE) && !Display.isCloseRequested()) {
         if (Display.isVisible()) {
            // check keyboard input
            processKeyboard();
            // do "game" logic, and render it
            logic();
            render();
         } else {
            // no need to render/paint if nothing has changed (ie. window
            // dragged over)
            if (Display.isDirty()) {
               render();
            }
            // don't waste cpu time, sleep more
            try {
               Thread.sleep(100);            
                                                         } catch (InterruptedException inte) {
            }
         }
         // Update window
         Display.update();
      }


the  FullScreenWindowedTest  runs well but my code is not

why?

Quote from: iamzealotwang on October 24, 2008, 09:01:25
    protected void logic(long timeDelta) {
       day = (day + 10) % 360;
       year = (year + 5) % 360;
    }

This always runs at maximum speed, i.e. as fast as your computer can render the scene. That is why it's too fast. The mentioned Thread.sleep() is only executed if the application is not visible (e.g. minimised). Otherwise it is skipped.

To run the animation at a better speed, you have to make it dependent on the time passed since the last frame (the above is FPS dependent), e.g.:
    protected void logic(long timeDelta) {
       day = (day + DEGREES_PER_MILLISECOND * timeDelta) % 360;
       year = (year + DEGREES_PER_MILLISECOND * timeDelta) % 360;
    }

Where DEGREES_PER_MILLISECOND is the number of degrees you want to move per millisecond; something like 0.05f for example.

Thanks~

Now I set my demo likes:

private static final int FPS = 60;
private static final long SLLEEP_TIME = 1000/FPS;

protected void run() {
     while (!Keyboard.isKeyDown(Keyboard.KEY_ESCAPE) && !Display.isCloseRequested()) {
          now = System.currentTimeMillis();
          timeDelta = now - lastTime;
          lastTime = now;
          if (Display.isVisible()) {
              logic();
              render();
           } else {
              if (Display.isDirty()) {
                  render();
           }
           }
           
         if(timeDelta < SLLEEP_TIME)
            try {
                Thread.sleep(SLLEEP_TIME-timeDelta);
            } catch (InterruptedException ex) {
            }
            Display.update();
        }
    }

and it look's great now

O(∩_∩)O

Quote from: iamzealotwang on October 27, 2008, 11:14:40
            try {
                Thread.sleep(SLLEEP_TIME-timeDelta);
            } catch (InterruptedException ex) {
            }

If you want to sync to a certain framerate, it is probably better to use Display.sync(...). Just replace the cited code with Display.sync(FPS);

use http://lwjgl.org/javadoc/org/lwjgl/Sys.html#getTime() instead :) or use Display.sync() :)

this is very much appreciated, thanks for your work.

Quote from: ilazarte on January 08, 2009, 07:16:17
this is very much appreciated, thanks for your work.

Thanks.

By the way, I've finished all chapters and updated the downloads. Time to get a book about GLSL or some other advanced topic, I guess :D

Interestingly enough I couldn't run the examples from the jar, my guess is some exception was being swallowed when I tried to click run.  However, downloading the source and running them from Eclipse is working great.  Thanks again.  Hard to believe its been almost a year since I've had a chance to look at lwjgl.  But work/life is finally opening up some time so .... :)