added setPosition() for Quads

Engine.cc

@@ -1347,6 +1347,7 @@ Engine::Quad::Quad(float cx, float cy, float cz,
     m_texture = 0;
     m_enable_blending = false;
     m_color[0] = m_color[1] = m_color[2] = m_color[3] = 1.0f;
+    m_position[0] = m_position[1] = m_position[2] = 0.0f;
     render();
 }
 
@@ -1385,6 +1386,8 @@ int Engine::Quad::render()
         glEnable(GL_BLEND);
         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
     }
+    glPushMatrix();
+    glTranslatef(m_position[0], m_position[1], m_position[2]);
     glBegin(GL_QUADS);
     glNormal3f(m_normal[0], m_normal[1], m_normal[2]);
     glVertex3f(m_center[0] + m_v1[0] + m_v2[0],
@@ -1400,6 +1403,7 @@ int Engine::Quad::render()
                m_center[1] + m_v1[1] - m_v2[1],
                m_center[2] + m_v1[2] - m_v2[2]);
     glEnd();
+    glPopMatrix();
     glPopAttrib();
     glEndList();
     return m_dl;

Engine.h

@@ -173,6 +173,13 @@ class Engine
                     m_offset = f;
                     render();
                 }
+                void setPosition(float x, float y, float z)
+                {
+                    m_position[0] = x;
+                    m_position[1] = y;
+                    m_position[2] = z;
+                    render();
+                }
                 void setTexture(int t)
                 {
                     m_texture = t;
@@ -200,6 +207,7 @@ class Engine
                 int m_texture;
                 bool m_enable_blending;
                 float m_color[4];
+                float m_position[3];
         };
 
         Engine(const std::string & path, AV & av);

ag.cc

@@ -740,6 +740,8 @@ fail:
             lua_setfield(L, -2, "setColor");
             lua_pushcfunction(L, quad::setOffset);
             lua_setfield(L, -2, "setOffset");
+            lua_pushcfunction(L, quad::setPosition);
+            lua_setfield(L, -2, "setPosition");
             lua_pushcfunction(L, quad::setTexture);
             lua_setfield(L, -2, "setTexture");
             lua_pushcfunction(L, quad::setVisible);
@@ -1697,6 +1699,25 @@ fail:
             return 0;
         }
 
+        int setPosition(lua_State * L)
+        {
+            int argc = lua_gettop(L);
+            if (argc == 4 && lua_istable(L, 1)
+                    && lua_isnumber(L, 2)
+                    && lua_isnumber(L, 3)
+                    && lua_isnumber(L, 4))
+            {
+                Engine::Quad * q = getQuad(L, 1);
+                if (q != NULL)
+                {
+                    q->setPosition(lua_tonumber(L, 2),
+                            lua_tonumber(L, 3),
+                            lua_tonumber(L, 4));
+                }
+            }
+            return 0;
+        }
+
         int setTexture(lua_State * L)
         {
             int argc = lua_gettop(L);

ag.h

@@ -104,6 +104,7 @@ namespace ag
         int setBlending(lua_State * L);
         int setColor(lua_State * L);
         int setOffset(lua_State * L);
+        int setPosition(lua_State * L);
         int setTexture(lua_State * L);
         int setVisible(lua_State * L);
     }