add graphics demo

Makefile

@@ -7,9 +7,9 @@ CXX := $(PREFIX)-g++
 LD := $(PREFIX)-ld
 CPPFLAGS := -I$(SFML_DIR)/include
 CXXFLAGS := -mwindows
-LDFLAGS := -L$(SFML_DIR)/lib -lsfml-system -lsfml-window -lopengl32 -lglu32 -static-libstdc++ -static-libgcc -mwindows
+LDFLAGS := -L$(SFML_DIR)/lib -lsfml-system -lsfml-window -lsfml-graphics -lopengl32 -lglu32 -static-libstdc++ -static-libgcc -mwindows
 
-all: clock window events opengl dlls
+all: clock window events opengl graphics dlls
 
 %: %.cpp
 	$(CXX) -o $@ $(CPPFLAGS) $(CXXFLAGS) $^ $(LDFLAGS)

graphics.cpp

@@ -0,0 +1,68 @@
+
+#include <iostream>
+#include <list>
+#include <math.h>
+#include <SFML/Graphics.hpp>
+
+sf::Shape build_ngon(int n, float radius)
+{
+    sf::Shape s;
+    for (int i = 0; i < n; i++)
+    {
+        float angle = i * 2.0 * M_PI / n;
+        float x = radius * cos(angle);
+        float y = radius * sin(angle);
+        s.AddPoint(x, y, sf::Color(255, 128, 0), sf::Color(0, 0, 100));
+    }
+    s.SetColor(sf::Color(255, 255, 255, 255));
+    s.SetOutlineWidth(4);
+    return s;
+}
+
+int main()
+{
+    sf::Clock Clock;
+    sf::RenderWindow App(sf::VideoMode(800, 600, 32), "SFML Graphics");
+//    App.UseVerticalSync(true);
+//    App.SetActive();
+    std::list<sf::Shape> shapes;
+
+    for (int n = 3, x = 0; x < 4; x++)
+    {
+        for (int y = 0; y < 3; y++, n++)
+        {
+            sf::Shape s = build_ngon(n, 75);
+            s.Move(200 * x + 100, 200 * y + 100);
+            shapes.push_back(s);
+        }
+    }
+
+    while (App.IsOpened())
+    {
+        sf::Event Event;
+        while (App.GetEvent(Event))
+        {
+            if (Event.Type == sf::Event::Closed)
+                App.Close();
+
+            if ( (Event.Type == sf::Event::KeyPressed)
+                    && (Event.Key.Code == sf::Key::Escape) )
+                App.Close();
+        }
+
+        App.Clear(sf::Color(0, 0, 0));
+
+        for (std::list<sf::Shape>::iterator it = shapes.begin();
+                it != shapes.end();
+                it++)
+        {
+            it->Rotate(1000 * Clock.GetElapsedTime());
+            App.Draw(*it);
+        }
+
+        App.Display();
+        Clock.Reset();
+    }
+
+    return EXIT_SUCCESS;
+}