draw_triangle.cpp

#include "Graph.h"          // get access to our graphics library facilities
#include "Simple_window.h"  // get access to our window library

using namespace Graph_lib;  // our graphics facilities are in Graph_lib

int main() {
    Point tl(100, 100);             // to become top left corner of window

    Simple_window win(tl, 600, 400, "Canvas");  // make a simple window

    Graph_lib::Polygon poly;        // make a shape (a polygon)

    poly.add(Point(300, 200));      // add a point
    poly.add(Point(350, 100));      // add another point
    poly.add(Point(400, 200));      // add a third point

    poly.set_color(Color::red);     // adjust properties of poly

    win.attach(poly);               // connect poly to the window

    win.wait_for_button();          // give control to the display engine
    return 0;
}