fix build warnings

ACG/GL/MeshCompiler.cc

@@ -1528,8 +1528,7 @@ void MeshCompiler::resolveTriangulation()
       {
         int negCornerID = triIndexBuffer_[drawTriID * 3 + k];
         int cornerID = -1 - negCornerID;
-        int vertexID = triIndexBuffer_[drawTriID * 3 + k] = getInputIndexSplit(faceID, cornerID);
-        assert(vertexID >= 0);
+        triIndexBuffer_[drawTriID * 3 + k] = getInputIndexSplit(faceID, cornerID);
       }
     }
   }

ACG/Math/DualQuaternionT.cc

@@ -411,8 +411,6 @@ namespace ACG {
     double r  = real_[0];
     Vec3   rv = Vec3(real_[1], real_[2], real_[3]);
 
-    Vec3   dv = Vec3(dual_[1], dual_[2], dual_[3]);
-    
     Vec3 tempVec = (rv % p) + r * p;
     p+=2.0*(rv % tempVec);
 

ACG/Scenegraph/CartesianClippingNode.hh

@@ -112,8 +112,6 @@ private:
 
   Vec3f cursor_;
   Plane enabled_;
-
-  GLdouble  xy_plane_[4], yz_plane_[4], xz_plane_[4];
 };
 
 

ObjectTypes/PolyLine/PolyLineT.cc

@@ -2132,12 +2132,12 @@ typename PolyLineT<PointT>::CustomPropertyHandle PolyLineT<PointT>::custom_prop_
 
 template <class PointT>
 typename PolyLineT<PointT>::CustomProperty* PolyLineT<PointT>::custom_prop(CustomPropertyHandle _handle) {
-  return (_handle >= 0 && _handle < get_num_custom_properties() ? cprop_enum[_handle] : NULL);
+  return (_handle >= 0 && _handle < int(get_num_custom_properties()) ? cprop_enum[_handle] : NULL);
 }
 
 template <class PointT>
 const typename PolyLineT<PointT>::CustomProperty* PolyLineT<PointT>::custom_prop(CustomPropertyHandle _handle) const {
-  return (_handle >= 0 && _handle < get_num_custom_properties() ? cprop_enum[_handle] : NULL);
+  return (_handle >= 0 && _handle < int(get_num_custom_properties()) ? cprop_enum[_handle] : NULL);
 }
 
 template <class PointT>