//----------resize----------
void resize(int newWidth, int newHeight){
//Resize Viewport
WIDTH= newWidth;
HEIGHT= newHeight;
GLdouble RatioViewPort= (float)WIDTH/(float)HEIGHT;
glViewport ( xInit, yInit, WIDTH, HEIGHT ) ;
//Resize Scene Visible Area
//Se actualiza el área visible de la escena
//para que su ratio coincida con ratioViewPort
GLdouble SVAWidth= _escena.get_xRight() - _escena.get_xLeft();
GLdouble SVAHeight= _escena.get_yTop() - _escena.get_yBot();
GLdouble SVARatio= SVAWidth/SVAHeight;
if (SVARatio >= RatioViewPort) {
// Increase SVAHeight
GLdouble newHeight= SVAWidth/RatioViewPort;
GLdouble yMiddle= ( _escena.get_yBot() + _escena.get_yTop() )/2.0;
_escena.set_yTop( yMiddle + newHeight/2.0);
_escena.set_yBot( yMiddle - newHeight/2.0);
}
else {
//Increase SVAWidth
GLdouble newWidth= SVAHeight*RatioViewPort;
GLdouble xMiddle= ( _escena.get_xLeft() + _escena.get_xRight() )/2.0;
_escena.set_xRight( xMiddle + newWidth/2.0);
_escena.set_xLeft( xMiddle - newWidth/2.0);
}
_escena.actualizarAVE(_escena.get_xLeft(), _escena.get_xRight(), _escena.get_yBot(), _escena.get_yTop());
}
//----------initGl----------
void intitGL() {
glClearColor(1.0,1.0,1.0,1.0);
glColor3f(1.0,0.0,0.0);
glPointSize(4.0);
glLineWidth(2.0);
// Viewport
glViewport(xInit, yInit, WIDTH, HEIGHT);
// Model transformation
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
_escena.actualizarAVE(_escena.get_xLeft(), _escena.get_xRight(), _escena.get_yBot(), _escena.get_yTop());
}