[SOLVED] Stuck at converting simple Processing code to OF

beginners
#1

Hi,

I’m pretty new with OF and i’ve been trying to port this simple code from Processing but i can’t seem to find the equivalent of g.get(int,int,int,int)

Any help/suggestion will be greatly appreciated. :slight_smile:

This is the Processing code:

  
PImage trail;   
   
void setup() {   
size(640,480,P3D);  
trail = new PImage(width,height);  
background(0);  
noStroke();   
}   
   
void draw() {   
 image(trail,0,0,width,height);  
 fill(255,0,0,32);   
 rect(mouseX,mouseY,20,20);   
 trail = g.get(10,10,width-20,height-20);   
}

This is the OF code:

  
#include "testApp.h" // contains ofImage trail;  
  
   void setup() {  
      ofBackground(0, 0, 0);  
      ofEnableAlphaBlending();  
      trail.allocate(640,480,GL_RGB); // Is it the correct equivalent  
                   // of 'trail = new PImage(width,height);' ?  
   }  
     
   void draw() {  
      trail.draw(0,0,width,height);  
      ofSetColor(255, 0, 0, 32);  
      ofRect(mouseX,mouseY,20,20);  
    // should the equivalent of  
    // 'trail = g.get(10,10,width-20,height-20);' be here?  
  }
#2

am I right, that you want to grab the screen?

then try grabScreen Method of ofImage: http://www.openframeworks.cc/documentat-…-grabScreen

ben

#3

Thank you, it worked! :slight_smile: