Time for opinions

crazy overclock · May 4, 2003, 06:08 AM

First you guys should download the JRE 1.4.2 as it boosts Java overall speed.
You can grab it here; it really got me thinking again about java performance.
Now 2D bump map appreciation time:
I coded this applet not that long ago, yet I still feel like there is something missing.
I can't put my hand on it as of yet, so let me collect your opinions and thoughts.
bumpmapping
To stop the light from tracking the cursor, just press the mouse left button and drag it out the applet.

Side note; this is how I compute per-pixel normals

Code:

  public vec3f normalAtVertex(point3f cen,point3f p1,point3f p2,
                              point3f p3 ,point3f p4,point3f p5,
                              point3f p6)
  {
                              /****************
                              *       p1  p6  *
                              *       o---o   *
                              *   p2/ | / |   *
                              *   o -cen- o   *
                              *   | / | / p5  *
                              *   o---o       *
                              *   p3  p4      *
                              ****************/

    vec1 = new vec3f(p1.x-cen.x, p1.y-cen.y, p1.z-cen.z);
    vec2 = new vec3f(p2.x-cen.x, p2.y-cen.y, p2.z-cen.z);
    vec3 = new vec3f(p3.x-cen.x, p3.y-cen.y, p3.z-cen.z);
    vec4 = new vec3f(p4.x-cen.x, p4.y-cen.y, p4.z-cen.z);
    vec5 = new vec3f(p5.x-cen.x, p5.y-cen.y, p5.z-cen.z);
    vec6 = new vec3f(p6.x-cen.x, p6.y-cen.y, p6.z-cen.z);

    nor1.cross(vec1,vec2);
    nor2.cross(vec2,vec3);
    nor3.cross(vec3,vec4);
    nor4.cross(vec4,vec5);
    nor5.cross(vec5,vec6);
    nor6.cross(vec6,vec1);

    vertexNormal = (inWards) ? new vec3f(-(nor1.x + nor2.x + nor3.x + nor4.x + nor5.x + nor6.x),
                                         -(nor1.y + nor2.y + nor3.y + nor4.y + nor5.y + nor6.y),
                                         -(nor1.z + nor2.z + nor3.z + nor4.z + nor5.z + nor6.z))
                             : new vec3f( nor1.x + nor2.x + nor3.x + nor4.x + nor5.x + nor6.x,
                                          nor1.y + nor2.y + nor3.y + nor4.y + nor5.y + nor6.y,
                                          nor1.z + nor2.z + nor3.z + nor4.z + nor5.z + nor6.z);
    vertexNormal.normalize();

    return vertexNormal;
  }

If interested in source code, just let me know; I'll be glad to share

UberLord · May 4, 2003, 09:47 AM

load: class bump_map.class not found.
java.lang.ClassNotFoundException: bump_map.class

I'm using BlackDown JRE 1.4.1 for Linux (pretty much the same as Suns JRE 1.4.1)

crazy overclock · May 4, 2003, 09:51 AM

Quote:

Originally posted by UberLord
load: class bump_map.class not found.
java.lang.ClassNotFoundException: bump_map.class

I'm using BlackDown JRE 1.4.1 for Linux (pretty much the same as Suns JRE 1.4.1)

Um you might wanna dld the new runtime environment; the same error happened to few people I know, however updating JRE fixed that .
Still using the 1.4.1 should allow the applet to run.
/me back coding.
PS: I use SDK 1.4.2 to produce my demos

UberLord · May 4, 2003, 09:54 AM

Erm - isn't 1.4.2 still in beta?

crazy overclock · May 4, 2003, 09:56 AM

Quote:

Originally posted by UberLord
Erm - isn't 1.4.2 still in beta?

True, but the performance leap over the "offical" releases is quite worth testing around

UberLord · May 4, 2003, 10:15 AM

Crashed out with the same error using Sun's 1.4.2 beta for linux

crazy overclock · May 4, 2003, 11:16 AM

Umm I don't see why would it do that

Btw for those who got it to work, what fps do yo uget at default settings?
On my Athlon 1.35 384 DDR I get around 22-23fps that sinks down 17-19 when radius is maximized.

WyreTheWolf · May 6, 2003, 01:57 PM

nifty effects... with the default settings I get 38 - 40 fps... maxed out.. I get about 30 - 33 fps I hope that is of some help.

UberLord · May 6, 2003, 02:38 PM

Same error on my XP box at work using 1.4.2 beta

here's the full error text incase it means something to you

Code:

java.lang.ClassNotFoundException: bump_map.class
	at sun.applet.AppletClassLoader.findClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at sun.applet.AppletClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at sun.applet.AppletClassLoader.loadCode(Unknown Source)
	at sun.applet.AppletPanel.createApplet(Unknown Source)
	at sun.plugin.AppletViewer.createApplet(Unknown Source)
	at sun.applet.AppletPanel.runLoader(Unknown Source)
	at sun.applet.AppletPanel.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)

Caused by: java.io.IOException: open HTTP connection failed.
	at sun.applet.AppletClassLoader.getBytes(Unknown Source)
	at sun.applet.AppletClassLoader.access$100(Unknown Source)
	at sun.applet.AppletClassLoader$1.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	... 10 more

UberLord · May 6, 2003, 04:53 PM

Update - it works fine in IE but not Mozilla. Can you try it using Mozilla and see what the problem is?

May 4, 2003, 09:47 AM	#2
UberLord A Legend in Underwear Join Date: May 2002 Location: Unknown Posts: 5,255 Rep Power: 0	Crashed load: class bump_map.class not found. java.lang.ClassNotFoundException: bump_map.class I'm using BlackDown JRE 1.4.1 for Linux (pretty much the same as Suns JRE 1.4.1) __________________ Gentoo Linux - Developer (baselayout) Read my blog "I contend that we are both atheists. I just believe in one fewer god than you do. When you understand why you dismiss all the other possible gods, you will understand why I dismiss yours." Stephen Roberts

May 4, 2003, 09:54 AM	#4
UberLord A Legend in Underwear Join Date: May 2002 Location: Unknown Posts: 5,255 Rep Power: 0	Erm - isn't 1.4.2 still in beta? __________________ Gentoo Linux - Developer (baselayout) Read my blog "I contend that we are both atheists. I just believe in one fewer god than you do. When you understand why you dismiss all the other possible gods, you will understand why I dismiss yours." Stephen Roberts

May 4, 2003, 10:15 AM	#6
UberLord A Legend in Underwear Join Date: May 2002 Location: Unknown Posts: 5,255 Rep Power: 0	Crashed out with the same error using Sun's 1.4.2 beta for linux __________________ Gentoo Linux - Developer (baselayout) Read my blog "I contend that we are both atheists. I just believe in one fewer god than you do. When you understand why you dismiss all the other possible gods, you will understand why I dismiss yours." Stephen Roberts

May 6, 2003, 04:53 PM	#10
UberLord A Legend in Underwear Join Date: May 2002 Location: Unknown Posts: 5,255 Rep Power: 0	Update - it works fine in IE but not Mozilla. Can you try it using Mozilla and see what the problem is? __________________ Gentoo Linux - Developer (baselayout) Read my blog "I contend that we are both atheists. I just believe in one fewer god than you do. When you understand why you dismiss all the other possible gods, you will understand why I dismiss yours." Stephen Roberts

May 4, 2003, 11:16 AM	Thread Starter #7
crazy overclock Java programmer Join Date: May 2002 Location: Massachusetts Posts: 125 Rep Power: 0	Umm I don't see why would it do that Btw for those who got it to work, what fps do yo uget at default settings? On my Athlon 1.35 384 DDR I get around 22-23fps that sinks down 17-19 when radius is maximized.

May 6, 2003, 01:57 PM	#8
WyreTheWolf Wolfish Bastard Join Date: May 2002 Location: Cave; Ozark Mountains Posts: 2,110 Rep Power: 0	nifty effects... with the default settings I get 38 - 40 fps... maxed out.. I get about 30 - 33 fps I hope that is of some help.