/*
 *
 * 		Empty SOP Node for Houdini
 * 			   from SOP_Star.h
 *
 */

#ifndef __sopEmptyNode_h__
#define __sopEmptyNode_h__

#include <SOP/SOP_Node.h>

namespace HDK_Sample {
class sopEmptyNode : public SOP_Node
{
	public:

		static OP_Node		*myConstructor(OP_Network*, const char *,
							    OP_Operator *);
		
		/// Stores the description of the interface of the SOP in Houdini.
		/// Each parm template refers to a parameter.
		static PRM_Template          myTemplateList[];
		
		/// This optional data stores the list of local variables.
		static CH_LocalVariable      myVariables[];

	protected:

		sopEmptyNode(OP_Network *net, const char *name, OP_Operator *op);
		virtual ~sopEmptyNode();
		
		/// cookMySop does the actual work of the SOP computing, 
		virtual OP_ERROR		 cookMySop(OP_Context &context);
		
		/// This function is used to lookup local variables that you have
		/// defined specific to your SOP.
		virtual bool		 evalVariableValue(
				    fpreal &val,
				    int index,
				    int thread);
		// Add virtual overload that delegates to the super class to avoid
		// shadow warnings.
		virtual bool		 evalVariableValue(
				    UT_String &v,
				    int i,
				    int thread)
				 {
				     return evalVariableValue(v, i, thread);
				 }
	private:

    /// Member variables are stored in the actual SOP, not with the geometry
    /// In this case these are just used to transfer data to the local 
    /// variable callback.
    /// Another use for local data is a cache to store expensive calculations.
    int		myCurrPoint;
    int		myTotalPoints;

};
} // End HDK_Sample namespace

#endif