ext/polygon.c in ray-0.2.0 vs ext/polygon.c in ray-0.2.1

@@ -19,10 +19,11 @@
   say_polygon *obj = say_polygon_create(0);
   VALUE rb = Data_Wrap_Struct(self, NULL, say_polygon_free, obj);
 
   say_drawable_set_shader_proc(obj->drawable, ray_drawable_shader_proc);
   say_drawable_set_other_data(obj->drawable, (void*)rb);
+  rb_iv_set(rb, "@shader_attributes", Qnil);
 
   return rb;
 }
 
 static
@@ -70,10 +71,11 @@
                                        ray_rb2col(color));
   VALUE rb = Data_Wrap_Struct(self, NULL, say_polygon_free, line);
 
   say_drawable_set_shader_proc(line->drawable, ray_drawable_shader_proc);
   say_drawable_set_other_data(line->drawable, (void*)rb);
+  rb_iv_set(rb, "@shader_attributes", Qnil);
 
   return rb;
 }
 
 /*
@@ -102,10 +104,11 @@
 
   ray_polygon_make_outline(poly, outline_width, outline);
 
   say_drawable_set_shader_proc(poly->drawable, ray_drawable_shader_proc);
   say_drawable_set_other_data(poly->drawable, (void*)ret);
+  rb_iv_set(ret, "@shader_attributes", Qnil);
 
   return ret;
 }
 
 /*
@@ -139,10 +142,11 @@
 
   ray_polygon_make_outline(poly, rb_outline_width, rb_outline);
 
   say_drawable_set_shader_proc(poly->drawable, ray_drawable_shader_proc);
   say_drawable_set_other_data(poly->drawable, (void*)ret);
+  rb_iv_set(ret, "@shader_attributes", Qnil);
 
   return ret;
 }
 
 /*
@@ -177,9 +181,10 @@
 
   VALUE rb = Data_Wrap_Struct(self, NULL, say_polygon_free, poly);
 
   say_drawable_set_shader_proc(poly->drawable, ray_drawable_shader_proc);
   say_drawable_set_other_data(poly->drawable, (void*)rb);
+  rb_iv_set(rb, "@shader_attributes", Qnil);
 
   return rb;
 }
 
 /*