Minor changed and draft for random samplingold_rework

1 files changed, 52 insertions, 0 deletions

diff --git a/src/sampling/sampler.hpp b/src/sampling/sampler.hpp
new file mode 100644
index 0000000..cd52421
--- /dev/null
+++ b/src/sampling/sampler.hpp
@@ -0,0 +1,52 @@
+#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