mod of ofxintersection example2

//--------------------------------------------------------------
void ofApp::update(){
    ofSetWindowTitle(ofToString(ofGetFrameRate()));

    int x = ofGetMouseX();
    int y = 400;
     int z = ofGetMouseY();//400;
    ray.set(ofPoint(0,0,0), ofPoint(x,y,z));
}

//--------------------------------------------------------------
void ofApp::draw(){
    ofBackground(0);

    cam.begin();
    ofSetColor(255, 0, 0);
    ray.draw();
 
    
    
    mesh.drawWireframe();
    
    
    IntersectionData id;
    
    mesh.getUniqueFaces().size();;
    int cnt = 0;
    ofPoint temp;
    for(int i=0;i<mesh.getUniqueFaces().size();i++){
        IsTriangle triangle;
        ofMeshFace face=mesh.getUniqueFaces().at(i);
        
        triangle.set(face);
        id=is.RayTriangleIntersection(triangle, ray);
       
        if(id.isIntersection){
            cnt++;
            ofSetColor(255, 0, 0,100);
            ofDrawSphere(id.pos,3);
            temp = id.pos;
            ofSetColor(200, 200, 200,150);
        }else{
            ofSetColor(0,0,0,0);
        }
        
        triangle.draw();
    }
    
    if(cnt % 2 == 0){
        
    }else{
        ofSetColor(0, 0, 255,150);
        ofDrawSphere(temp,5);
    }
    
     
    cam.end();
    
     ofDrawBitmapStringHighlight("pos "+ofToString(ofGetMouseX())+", 400 , "+ofToString(ofGetMouseY()),10,30);
}