Rotate a box2d Rect

Rotate Box2d Rect

#include "testApp.h"
#include "ofxBox2d.h"

ofxBox2dRect                            centerRect;
ofxBox2d                                box2d;
vector		<ofPtr<ofxBox2dCircle> >	circles;


//--------------------------------------------------------------
void testApp::setup() {
    
    ofDisableAntiAliasing();
	ofSetVerticalSync(true);
	ofBackgroundHex(0xfdefc2);
	ofSetLogLevel(OF_LOG_NOTICE);
		
	box2d.init();
	box2d.setGravity(0, 10);
	box2d.createGround();
	box2d.setFPS(30.0);
	   
    centerRect.setPhysics(0, 0, 0);
    centerRect.setup(box2d.getWorld(), ofGetWidth()/2, ofGetHeight()/2, 500, 50);
}

//--------------------------------------------------------------
void testApp::update() {
	box2d.update();
    
    if((int)ofRandom(10)==0) {
        circles.push_back(ofPtr<ofxBox2dCircle>(new ofxBox2dCircle));
        circles.back().get()->setPhysics(3.0, 0.53, 0.1);
        circles.back().get()->setup(box2d.getWorld(), ofRandom(-100, 100)+(ofGetWidth()/2), 10, ofRandom(2, 10));
    }
    
    ofRemove(circles, ofxBox2dBaseShape::shouldRemoveOffScreen);
}


//--------------------------------------------------------------
void testApp::draw() {
	
	
	for(int i=0; i<circles.size(); i++) {
		ofFill();
		ofSetHexColor(0x90d4e3);
		circles[i].get()->draw();
	}
	
	
    ofFill();
	ofSetColor(255, 0, 255);
    centerRect.draw();
    ofSetColor(255);
    ofCircle(centerRect.getPosition(), 3);

	string info = "";
	info += "Press [c] for circles\n";
	info += "Total Bodies: "+ofToString(box2d.getBodyCount())+"\n";
	info += "Total Joints: "+ofToString(box2d.getJointCount())+"\n\n";
	info += "FPS: "+ofToString(ofGetFrameRate())+"\n";
	ofSetHexColor(0x444342);
	ofDrawBitmapString(info, 30, 30);
}

//--------------------------------------------------------------
void testApp::keyPressed(int key) {
	
	if(key == 'c') {
		float r = ofRandom(4, 20);
		circles.push_back(ofPtr<ofxBox2dCircle>(new ofxBox2dCircle));
		circles.back().get()->setPhysics(3.0, 0.53, 0.1);
		circles.back().get()->setup(box2d.getWorld(), mouseX, mouseY, r);
	}
	
	if(key == 't') ofToggleFullscreen();

	
}

//--------------------------------------------------------------
void testApp::keyReleased(int key) {
	
}

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

//--------------------------------------------------------------
void testApp::mouseDragged(int x, int y, int button) {
    
    ofVec2f vec = ofPoint(x, y) - centerRect.getPosition();
    float angle = ofRadToDeg( atan2(-vec.y, vec.x) * -1 );
    centerRect.setRotation(angle);
    centerRect.updateMesh();
    printf("Angle %f\n", angle);

}

//--------------------------------------------------------------
void testApp::mousePressed(int x, int y, int button) {
    ofVec2f vec = ofPoint(x, y) - centerRect.getPosition();
    float angle = ofRadToDeg( atan2(-vec.y, vec.x) * -1 );
    centerRect.setRotation(angle);
    centerRect.updateMesh();
    printf("Angle %f\n", angle);
}

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

}

//--------------------------------------------------------------
void testApp::resized(int w, int h){
	
}

Thank you! This helped me with rotating objects.