#ifndef __ISDFINTERPOLATOR_H__
#define __ISDFINTERPOLATOR_H__

#include "ISDF.h"
#include "OctreeADF.h"

namespace SDF {

	/*
	 * The interface for SDF interpolation functions
	 * Implementations would include TrilinearSdfInterp, CoonsSdfInterp, etc.
	 *
	 * Interface usage:
	 * First, create an implementation instance.
	 * Then, use setNode to tell it which SDF node to interpolate for.
	 * After setting the node, call interpolate(from) to get the
	 * interpolated SDF from 'from' to the interpolated surface.
	 *
	 * Implementations must allow users to call setNode again to
	 * interpolate for a different node.  So once setNode is called
	 * for a different node, interpolate will begin returning SDFs
	 * for the new node.
	 *
	 * For now, interpolators only have to return signed doubles,
	 * as opposed to the SdfValue structure.  So they are not required
	 * to return a closest-point.
	 */
	class ISdfInterpolator
	{
	public:
		ISdfInterpolator(void);
		~ISdfInterpolator(void);

		virtual void setNode(octreeNode *node) = 0;
		virtual double interpolate(const Point &from) = 0;
	};

}

#endif // __ISDFINTERPOLATOR_H__