Multithreaded world generation with Perlin

1 files changed, 36 insertions, 0 deletions

diff --git a/src/Util/Sampler.hpp b/src/Util/Sampler.hpp
new file mode 100644
index 0000000..3a4ff4f
--- /dev/null
+++ b/src/Util/Sampler.hpp
@@ -0,0 +1,36 @@
+#pragma once
+
+#include <functional>
+#include "../Math/Vector.hpp"
+#include "../Math/Grid.hpp"
+
+namespace MC::Util {
+
+template<size_t D, typename T>
+class Sampler {
+    using Pos = Vector<D>;
+    using Sample = std::function<T(Pos)>;
+    using Interpolate = std::function<T(Pos, Sample)>;
+public:
+    Sampler(
+        Sample sample,
+        Pos offset = {},
+        float scale = 1.0f,
+        Interpolate interpolate = nearest_interpolation
+    ) : m_sample([=](Sampler::Pos pos) -> T {
+        return interpolate(pos, [=](Sampler::Pos p) -> T { return sample(p * scale + offset); });
+    }) {}
+
+    T sample(Pos at) {
+        return m_sample(at);
+    }
+
+    static T nearest_interpolation(Pos pos, Sample sample) {
+        return sample(pos);
+    }
+
+private:
+    Sample m_sample;
+};
+
+}
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