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#ifndef SAMPLER_H
#define SAMPLER_H
#include <core/vector.hpp>
#include <memory>
static const double LargestBelowOne = 0x1.fffffffffffffp-1;
class Sampler {
public:
Sampler(long sampleCount) : m_sampleCount(sampleCount) {}
/** @brief Start a new pixel sample
*
* Some samplers might find it usefull to get the position
*/
void startPixel(const Vec2d &p);
/** @brief Called by renderers when a new sample begins
*
* @return Whether this is the last sample
*/
bool startNextSample();
/** @brief Get a single sample */
virtual double getSample() = 0;
/** @brief Get a 2d sample
*
* Algorithms can optimize for getting 2d samples
*/
virtual Vec2d get2dSample() = 0;
/** @brief Clones the sampler
*
* Usefull when multiple threads need a sampler.
*
* @param seed Seed to set in cloned sampler
*/
virtual std::unique_ptr<Sampler> clone(int seed) = 0;
const long m_sampleCount;
protected:
Vec2d m_curPixel;
long m_curPixelSampleIndex;
};
#endif
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