diff --git a/Engine.cc b/Engine.cc
index c61550b..203a802 100644
--- a/Engine.cc
+++ b/Engine.cc
@@ -1303,3 +1303,78 @@ Engine::PickedObject::PickedObject(OdeWorld::PickedObjectRef por)
     normal[1] = por->normal[1];
     normal[2] = por->normal[2];
 }
+
+/******** Engine::Quad functions ********/
+
+Engine::Quad::Quad(float cx, float cy, float cz,
+                   float v1x, float v1y, float v1z,
+                   float v2x, float v2y, float v2z)
+{
+    m_center[0] = cx;
+    m_center[1] = cy;
+    m_center[2] = cz;
+    m_v1[0] = v1x;
+    m_v1[1] = v1y;
+    m_v1[2] = v1z;
+    m_v2[0] = v2x;
+    m_v2[1] = v2y;
+    m_v2[2] = v2z;
+    dNormalize3(m_normal);
+    m_dl = 0;
+    m_visible = true;
+    m_offset = 0.0f;
+    m_texture = 0;
+    m_enable_blending = false;
+    dCROSS(m_normal, =, m_v1, m_v2);
+    render();
+}
+
+Engine::Quad::~Quad()
+{
+    if (m_dl != 0)
+    {
+        glDeleteLists(m_dl, 1);
+    }
+}
+
+int Engine::Quad::render()
+{
+    if (m_dl == 0)
+    {
+        m_dl = glGenLists(1);
+    }
+    glNewList(m_dl, GL_COMPILE);
+    bool do_offset = !FP_EQ(m_offset, 0.0f);
+    glPushAttrib(GL_POLYGON_BIT | GL_TEXTURE_BIT | GL_COLOR_BUFFER_BIT);
+    if (do_offset)
+    {
+        glEnable(GL_POLYGON_OFFSET_FILL);
+    }
+    if (m_texture != 0)
+    {
+        glBindTexture(GL_TEXTURE_2D, m_texture);
+    }
+    if (m_enable_blending)
+    {
+        glEnable(GL_BLEND);
+        glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+    }
+    glBegin(GL_QUADS);
+    glNormal3f(m_normal[0], m_normal[1], m_normal[2]);
+    glVertex3f(m_center[0] + m_v1[0] + m_v2[0],
+               m_center[1] + m_v1[1] + m_v2[1],
+               m_center[2] + m_v1[2] + m_v2[2]);
+    glVertex3f(m_center[0] - m_v1[0] + m_v2[0],
+               m_center[1] - m_v1[1] + m_v2[1],
+               m_center[2] - m_v1[2] + m_v2[2]);
+    glVertex3f(m_center[0] - m_v1[0] - m_v2[0],
+               m_center[1] - m_v1[1] - m_v2[1],
+               m_center[2] - m_v1[2] - m_v2[2]);
+    glVertex3f(m_center[0] + m_v1[0] - m_v2[0],
+               m_center[1] + m_v1[1] - m_v2[1],
+               m_center[2] + m_v1[2] - m_v2[2]);
+    glEnd();
+    glPopAttrib();
+    glEndList();
+    return m_dl;
+}
diff --git a/Engine.h b/Engine.h
index 973f1d4..2ab0119 100644
--- a/Engine.h
+++ b/Engine.h
@@ -154,6 +154,45 @@ class Engine
         };
         typedef refptr<PickedObject> PickedObjectRef;
 
+        class Quad
+        {
+            public:
+                Quad(float cx, float cy, float cz,
+                        float v1x, float v1y, float v1z,
+                        float v2x, float v2y, float v2z);
+                ~Quad();
+                int render();
+                void setVisible(bool v) { m_visible = v; }
+                void draw()
+                {
+                    if (m_visible && m_dl > 0)
+                        glCallList(m_dl);
+                }
+                void setOffset(float f)
+                {
+                    m_offset = f;
+                    render();
+                }
+                void setTexture(int t)
+                {
+                    m_texture = t;
+                    render();
+                }
+                void setBlending(bool b)
+                {
+                    m_enable_blending = b;
+                    render();
+                }
+            protected:
+                dVector3 m_center;
+                dVector3 m_v1, m_v2, m_normal;
+                int m_dl;
+                bool m_visible;
+                float m_offset;
+                int m_texture;
+                bool m_enable_blending;
+        };
+
         Engine(const std::string & path, AV & av);
         ~Engine();