line packing example

gistfile1.txt

// ofApp.h :

#pragma once

#include "ofMain.h"


class line {
    
public:
    
    ofPoint a;
    ofPoint b;
    
};


class ofApp : public ofBaseApp{

	public:
		void setup();
		void update();
		void draw();

		void keyPressed(int key);
		void keyReleased(int key);
		void mouseMoved(int x, int y );
		void mouseDragged(int x, int y, int button);
		void mousePressed(int x, int y, int button);
		void mouseReleased(int x, int y, int button);
		void mouseEntered(int x, int y);
		void mouseExited(int x, int y);
		void windowResized(int w, int h);
		void dragEvent(ofDragInfo dragInfo);
		void gotMessage(ofMessage msg);
		
    vector < line > lines;
    
};


ofApp.cpp: 


#include "ofApp.h"

//--------------------------------------------------------------
void ofApp::setup(){

}

//--------------------------------------------------------------
void ofApp::update(){

    
    for (int i = 0; i < 100; i++){
    
        ofPoint ptA(ofRandom(0,ofGetWidth()), ofRandom(0,ofGetHeight()));
        float randomAngle = ofRandom(0,PI);
        ofPoint ptB = ptA + 20* ofPoint(cos(randomAngle), sin(randomAngle));
        
        
        bool bDoIntersectWithAnyone = false;
        
        for (auto line : lines){
            ofPoint intersection;
            if (ofLineSegmentIntersection(ptA, ptB, line.a, line.b, intersection)){
                bDoIntersectWithAnyone = true;
                break;
            }
        }
        
        if (!bDoIntersectWithAnyone){
            line tempLine;
            tempLine.a = ptA;
            tempLine.b = ptB;
            lines.push_back(tempLine);
        }
    }
    
}

//--------------------------------------------------------------
void ofApp::draw(){

    ofBackground(0);
    
    for (auto line : lines){
        ofDrawLine(line.a, line.b);
    }
}

//--------------------------------------------------------------
void ofApp::keyPressed(int key){

}

//--------------------------------------------------------------
void ofApp::keyReleased(int key){

}

//--------------------------------------------------------------
void ofApp::mouseMoved(int x, int y ){

}

//--------------------------------------------------------------
void ofApp::mouseDragged(int x, int y, int button){

}

//--------------------------------------------------------------
void ofApp::mousePressed(int x, int y, int button){

}

//--------------------------------------------------------------
void ofApp::mouseReleased(int x, int y, int button){

}

//--------------------------------------------------------------
void ofApp::mouseEntered(int x, int y){

}

//--------------------------------------------------------------
void ofApp::mouseExited(int x, int y){

}

//--------------------------------------------------------------
void ofApp::windowResized(int w, int h){

}

//--------------------------------------------------------------
void ofApp::gotMessage(ofMessage msg){

}

//--------------------------------------------------------------
void ofApp::dragEvent(ofDragInfo dragInfo){ 

}