ofApp.cpp

#include "ofApp.h"

//--------------------------------------------------------------
void ofApp::setup() {
	
    ofDisableAntiAliasing();
	ofBackgroundHex(0xfdefc2);
	ofSetLogLevel(OF_LOG_NOTICE);
	ofSetVerticalSync(true);
	
	// Box2d
	box2d.init();
	box2d.setGravity(0, 30);
	box2d.createGround();
	box2d.setFPS(60.0);
	
	
	// load the lines we saved...
	std::ifstream f;
	f.open(ofToDataPath("lines.txt").c_str());
	vector <string> strLines;
	while (!f.eof()) {
		string ptStr;
		getline(f, ptStr);
		strLines.push_back(ptStr);
	}
	f.close();
	
	for (int i=0; i<strLines.size(); i++) {
		vector <string> pts = ofSplitString(strLines[i], ",");
		if(pts.size() > 0) {
			auto edge = make_shared<ofxBox2dEdge>();
			for (int j=0; j<pts.size(); j+=2) {
				if(pts[j].size() > 0) {
					float x = ofToFloat(pts[j]);
					float y = ofToFloat(pts[j+1]);
					edge->addVertex(x, y);
				}				
			}
			edge->create(box2d.getWorld());
			edges.push_back(edge);
		}
	}
	
}

//--------------------------------------------------------------
void ofApp::update() {
	
	// add some circles every so often
	if((int)ofRandom(0, 10) == 0) {
		auto c = make_shared<ofxBox2dCircle>();
		c->setPhysics(0.2, 0.2, 0.002);
		c->setup(box2d.getWorld(), ofRandom(20, 50), -20, ofRandom(3, 10));
        c->setVelocity(0, 15); // shoot them down!
		circles.push_back(c);
	}
	
    
    
	box2d.update();	
}

//--------------------------------------------------------------
void ofApp::draw() {
	
    for (auto &circle : circles) {
		ofFill();
		ofSetHexColor(0xc0dd3b);
		circle->draw();
	}
	
	ofSetHexColor(0x444342);
	ofNoFill();
    for (auto &line : lines) {
		line.draw();
	}	
    for (auto & edge : edges) {
		edge->draw();
	}	
	
	string info = "Draw a shape with the mouse\n";
	info += "Press 1 to add some circles\n";
	info += "Press c to clear everything\n";
	
	ofSetHexColor(0x444342);
	ofDrawBitmapString(info, 10, 15);
}


//--------------------------------------------------------------
void ofApp::keyPressed(int key) {
	
	if(key == '1') {
        auto c = make_shared<ofxBox2dCircle>();
		c->setPhysics(1, 0.5, 0.5);
		c->setup(box2d.getWorld(), mouseX, mouseY, 10);
		circles.push_back(c);
	}
	
	if(key == 'c') {
		lines.clear();
		edges.clear();
	}
	
	/*
	// want to save out some line...
	if(key == ' ') {
		std::ofstream f;
		f.clear();
		f.open(ofToDataPath("lines.txt").c_str());
		for (int i=0; i<lines.size(); i++) {
			for (int j=0; j<lines[i].size(); j++) {
				float x = lines[i][j].x;
				float y = lines[i][j].y;
				f << x << "," << y << ",";
			}
			f << "\n";
		}
		f.close();lines.clear();
	}*/
}

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

//--------------------------------------------------------------
void ofApp::mouseDragged(int x, int y, int button) {
	lines.back().addVertex(x, y);
}

//--------------------------------------------------------------
void ofApp::mousePressed(int x, int y, int button) {
	lines.push_back(ofPolyline());
	lines.back().addVertex(x, y);
}

//--------------------------------------------------------------
void ofApp::mouseReleased(int x, int y, int button) {
	
    auto edge = make_shared<ofxBox2dEdge>();
	
    lines.back().simplify();
	
	for (int i=0; i<lines.back().size(); i++) {
		edge->addVertex(lines.back()[i]);
	}
	
	// edge->setPhysics(1, .2, 1);  // uncomment this to see it fall!
	edge->create(box2d.getWorld());
	edges.push_back(edge);
	
}

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