From 7e3ea6b0080b2c9127964a096a27369d8cc59c67 Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Sun, 26 Mar 2017 15:38:58 +0200
Subject: Rename `TorusArray` to `TorusMatrix` to better fit the represented
 structure

---
 src/util/torus_matrix.h | 52 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 src/util/torus_matrix.h

(limited to 'src/util/torus_matrix.h')

diff --git a/src/util/torus_matrix.h b/src/util/torus_matrix.h
new file mode 100644
index 0000000..d09b99e
--- /dev/null
+++ b/src/util/torus_matrix.h
@@ -0,0 +1,52 @@
+#ifndef LIFE_SRC_UTIL_TORUS_MATRIX_
+#define LIFE_SRC_UTIL_TORUS_MATRIX_
+
+#include <array>
+#include <cstdint>
+
+namespace life {
+namespace util {
+
+template<
+	typename    TYPE,
+	std::size_t WIDTH,
+	std::size_t HEIGHT
+>
+class TorusMatrix {
+	static std::size_t toMatrixColumn(const std::ptrdiff_t x) {
+		if ( x >= 0 ) {
+			return x % WIDTH;
+		} else {
+			return WIDTH - ( std::abs(x) % WIDTH );
+		}
+	}
+
+	static std::size_t toMatrixRow(const std::ptrdiff_t y) {
+		if ( y >= 0 ) {
+			return y % HEIGHT;
+		} else {
+			return HEIGHT - ( std::abs(y) % HEIGHT );
+		}
+	}
+
+	public:
+		static const std::size_t width  = WIDTH;
+		static const std::size_t height = HEIGHT;
+
+		TYPE get(const std::ptrdiff_t x, const std::ptrdiff_t y) const {
+			return this->matrix_[toMatrixRow(y)][toMatrixColumn(x)];
+		}
+
+		void set(const std::ptrdiff_t x, const std::ptrdiff_t y, TYPE&& value) {
+			this->matrix_[toMatrixRow(y)][toMatrixColumn(x)] = value;
+		}
+	
+	private:
+		std::array<std::array<TYPE, WIDTH>, HEIGHT> matrix_;
+
+};
+
+}
+}
+
+#endif  // LIFE_SRC_UTIL_TORUS_MATRIX_
-- 
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