hi im also new to processing and using the 0114 beta version
i would like to put an kind of motionblur/feedback effekt on some rotating typo (P3D) and moving beziercurves

here is an examplescript for a simple kind of feedback i found (sorry, cant remember from where)

--------------------------------------------------
void setup() {
 size(640,480);
 fill(255);
 stroke(0);
}

void loop() {
 fadescr(255,255,255);
 line(mouseX,mouseY,mouseX+100,mouseY);
}

void fadescr(int r, int g, int b) {
 int red, green, blue;
 for (int i = 0; i < pixels.length; i++) {
   red = (pixels[i] >> 16) & 0x000000ff;
   green = (pixels[i] >> 8) & 0x000000ff;
   blue = pixels[i] & 0x000000ff;
   pixels[i] = (((red+((r-red)>>3)) << 16) | ((green+((g-green)>>3)) << 8) | (blue+((b-blue)>>3)));
 }
}
--------------------------------------------------

it works with processing 0068 alpha but not with my version 0114
actualy most of the codes i found on the net dont work with my version
i know i have to change BImage to PImage and BGraphics to PGraphics etc.

i also tryed to draw some offscreen images with PGraphics but it also dosent work

so. could somebody please tell me whats wrong with the code above for 0114 beta
and if and how it is possible to draw stuff first to an offscreen in processing 0114

thanx for help

_tobias

yes. i know
i left the code like it worked in version 0068

in 0114 beta with draw instead of loop i get the error:

-------------------------------------

java.lang.NullPointerException


at Temporary_1263_4176.fadescr(Temporary_1263_4176.java:14)


at Temporary_1263_4176.draw(Temporary_1263_4176.java:8)


at processing.core.PApplet.handleDisplay(PApplet.java:1336)


at processing.core.PGraphics.requestDisplay(PGraphics.java:535)


at processing.core.PApplet.run(PApplet.java:1152)


at java.lang.Thread.run(Unknown Source)
-------------------------------------

with loop just an empty screen

-------------------------------------
-------------------------------------

how can i do something like:
PGraphics offscreenbuffer;
offscreenbuffer = new PGraphics(width,height,null);
offscreenbuffer.line(10,10,10,10);
etc.

thanx for answering

now i read the f*g + the endless revisions
and im using loadPixels and updatePixels
and i still dont understand why it is not doing my bitshifts


is it still the same language ???


void setup() {
 size(640,480);
 fill(255);
 stroke(0);
}

void draw() {
 loadPixels();
 fadescr(255,255,255);
 updatePixels();
 line(mouseX,mouseY,mouseX+100,mouseY);
}

void fadescr(int r, int g, int b) {
 int red, green, blue;
 for (int i = 0; i < pixels.length; i++) {
   red = (pixels[i] & 0x000000ff) >> 16;
   green = (pixels[i] & 0x000000ff) >> 8;
   blue = (pixels[i] & 0x000000ff) >> 0;
   pixels[i] = (((red+((r-red)>>3)) << 16) | ((green+((g-green)>>3)) << 8) | (blue+((b-blue)>>3)));  

 }
}

hi fjen

it works
so pixels didnt have an alpha channel in version 0068 ?!
thanx a lot for your help

best.

_tobias