#ifndef __SAMPLER__
#define __SAMPLER__

#include <vector>
#include "Point2D.h"
#include "Point3D.h"

class Sampler {
	protected:
		int num_samples;
		int num_sets;
		std::vector<Point2D> samples;
		std::vector<int> shuffled_indices;
		std::vector<Point2D> disk_samples;
		std::vector<Point3D> hemisphere_samples;
		unsigned long count;
		int jump;

	public:
		Sampler(void);
		Sampler(int ns);
		Sampler(const Sampler& s);
		virtual ~Sampler(void);

		virtual void generate_samples(void) = 0;
		void setup_shuffled_indices(void);
		void shuffle_samples(void);
		Point2D sample_unit_square(void);
		int get_num_samples(void);
		void map_samples_to_unit_disk(void);
		void map_samples_to_hemisphere(const float e);
};

#endif




#ifndef __JITTERED__
#define __JITTERED__

#include "Sampler.h"

class Jittered : public Sampler {
	public:
		Jittered(void);
		Jittered(int ns);
		virtual ~Jittered(void);

		virtual void generate_samples(void);
};

#endif