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Index › Programming Questions & Help › Syntax Questions › PGraphics (Java2D) and fill
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PGraphics (Java2D) and fill (Read 3171 times)
mantissa
PGraphics (Java2D) and fill
Feb 15th, 2007, 10:14pm  

Hey, the contents (colors) of rectangles drawn into PGraphics are not showing up (v0124, 10.4.8). Not sure if this is the same problem that Vade was running into weeks ago (though I am using JAVA2D for drawing) or a problem with my code.

Jeremy

PGraphics context1;
 
void setup()
{
 size(300,300,JAVA2D);
 context1 = createGraphics(width-20,height-20, JAVA2D);
 context1.beginDraw();
 context1.background(0);
 context1.endDraw();
 
 //drawShape();
}
 
void draw()
{

 //background(mouseY,0,0);*/
 //stroke(0,255,0);
 //line(0,0,width,height);
 
 image(context1,0,0);
}

void mousePressed() {

  drawShape(mouseX, mouseY);
}

void drawShape(int x, int y){
 
 context1.beginDraw();
 context1.fill(255);
  // context1.noStroke();
 context1.stroke(200);
 
 context1.translate(x, y);
 context1.rect(0, 0, 40, 40);
 
 context1.endDraw();
 
}
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head
Re: PGraphics (Java2D) and fill
Reply #1 - Feb 23rd, 2007, 12:35pm  
i have same issue, i've discovered it yesterday and spent some time on it...

PGraphics pg;

void setup() {
 size(320,200);
 pg = createGraphics(320, 200, P3D);
 background(255);
 pg.beginDraw();
 pg.background(255);
 pg.stroke(255, 200, 0, 100);
 pg.fill(255, 200, 0, 100);
 pg.ellipse(40,40, 50, 50);
 pg.ellipse(60,60, 50, 50);
 pg.endDraw();
 image(pg, 0, 0);    
}

fill() doesn't work

i am using version 0118 Beta, and P3D becase there is null pointer exception when calling   image(pg, 0, 0);     with JAVA2D...
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vade
Re: PGraphics (Java2D) and fill
Reply #2 - Mar 3rd, 2007, 8:08am  
This might be related to a bug I found and reported :

http://processing.org/discourse/yabb_beta/YaBB.cgi?board=Syntax;action=display;num=1168241817
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//./;[]/// http://abstrakt.vade.info
WWW  
trip
Re: PGraphics (Java2D) and fill
Reply #3 - Mar 7th, 2007, 7:43am  
similar problem here (using 124):

PGraphics context1;
int xx = 0;
void setup()
{
 size(300,300);
 context1 = createGraphics(width-20,height-20, JAVA2D);
}

void draw()
{
 xx++;
 stroke(0,255,0);
 line(0,0,width,height);
 context1.beginDraw();
 context1.background(0,200,0);
 context1.fill(0,0,255);
 context1.stroke(200,0,0);
 context1.translate(60, xx);
 context1.rect(0, 0, 40, 40);
 context1.endDraw();
 image(context1,0,0);
}

Notice that the rect gets drawn, but it does not update. Reallocating the PGraphics object in the main loop makes the rect move down, but that seems like a waste.

c.
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fry
Re: PGraphics (Java2D) and fill
Reply #4 - Mar 7th, 2007, 3:28pm  
for the time being, use
context1.modified = true;
after you've made any changes. but it's something that needs to be fixed--it should be getting called automatically in endDraw().
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trip
Re: PGraphics (Java2D) and fill
Reply #5 - Mar 7th, 2007, 10:33pm  
Thanks Ben, that makes it work. Good thing that field is public.

c.
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fry
Re: PGraphics (Java2D) and fill
Reply #6 - Mar 9th, 2007, 5:29pm  
yep, that's why she's public.
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mzdoherty
Re: PGraphics (Java2D) and fill
Reply #7 - Jun 4th, 2007, 6:32pm  
so i'm not sure if i'm doing this correctly, but fill is still not working. My code looks like this(using 0124):

PGraphics pg;

void setup() {
 size(300,300);
 pg = createGraphics(300, 300, P3D);
}

void draw(){

 pg.beginDraw();
 pg.fill(0);
 pg.ellipse(mouseX, mouseY, 50,50);
 pg.modified = true;
 pg.endDraw();

 image(pg,0,0);
}
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sambamillennium  
jaylfk
Re: PGraphics (Java2D) and fill
Reply #8 - Jun 5th, 2007, 4:35am  
Hi,

as described in the topic's subject, the hint given by Fry is for Java2d. Wink

Quote:
PGraphics pg;

void setup() {
 size(300,300);
 pg = createGraphics(300, 300, JAVA2D);
}

void draw(){
 pg.background(255);
 pg.beginDraw();
 pg.fill(120,0,0);
 pg.ellipse(mouseX, mouseY, 50,50);
 pg.modified = true;
 pg.endDraw();
 image(pg,0,0);
}
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mzdoherty
Re: PGraphics (Java2D) and fill
Reply #9 - Jun 5th, 2007, 4:56am  
so no fix for p3d then
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sambamillennium  
fry
Re: PGraphics (Java2D) and fill
Reply #10 - Jun 6th, 2007, 3:21pm  
separate issue with P3D.. you need to call loadPixels() on your JAVA2D drawing surface before drawing it with P3D. (at least for now, will straighten all this out together...)
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nospec
Re: PGraphics (Java2D) and fill
Reply #11 - Jun 15th, 2007, 4:59pm  
Uhhm, with the chance of sounding like a total nitwit but where do you call the loadPixels???

PGraphics pg;  
 
void setup() {  
 size(300,300);
 pg = createGraphics(300, 300, P3D);
}  
 
void draw(){  
 background(128);
 
 pg.beginDraw();  
 pg.background(255);
 pg.fill(120,0,0);  
 pg.ellipse(mouseX, mouseY, 50,50);  
 pg.modified = true;  
 pg.endDraw();
 
 image(pg,0,0);  
}
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« Last Edit: Jun 17th, 2007, 6:46pm by nospec »  
 
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