From d3ae7832ab0beae40bac664a5ce9da21804d9916 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gustav=20S=C3=B6rn=C3=A4s?= <gusso230@student.liu.se>
Date: Sun, 16 Aug 2020 03:49:43 +0200
Subject: initial lab1

---
 lab1/src/life.cpp | 104 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 104 insertions(+)
 create mode 100644 lab1/src/life.cpp

(limited to 'lab1/src')

diff --git a/lab1/src/life.cpp b/lab1/src/life.cpp
new file mode 100644
index 0000000..cf5c6c9
--- /dev/null
+++ b/lab1/src/life.cpp
@@ -0,0 +1,104 @@
+// Gustav Sörnäs - gusso230
+
+#include "grid.h"
+#include "lifeutil.h"
+
+#include <iostream>
+#include <fstream>
+#include <string>
+
+/*
+ * Print a representation of the grid.
+ * Alive cells show as 'X', dead show as '-'.
+ */
+void printGrid(Grid<bool> &grid) {
+    for (int y = 0; y < grid.numRows(); y++) {
+        for (int x = 0; x < grid.numCols(); x++) {
+            if (grid.get(y, x)) {
+                std::cout << 'X';
+            } else {
+                std::cout << '-';
+            }
+        }
+        std::cout << std::endl;
+    }
+}
+
+/*
+ * Return 1 if (x, y) is in bounds and alive, otherwise 0.
+ */
+int checkPoint(Grid<bool> &grid, int y, int x) {
+    return grid.inBounds(y, x) && grid.get(y, x) ? 1 : 0;
+}
+
+/*
+ * Simulate the grid one time step and update it in-place.
+ */
+void simulate(Grid<bool> &grid) {
+    Grid<bool> prevGrid(grid);
+    for (int y = 0; y < grid.numRows(); y++) {
+        for (int x = 0; x < grid.numCols(); x++) {
+            int numNeighbours = checkPoint(prevGrid, y-1, x-1) +
+                    checkPoint(prevGrid, y-1, x  ) +
+                    checkPoint(prevGrid, y-1, x+1) +
+                    checkPoint(prevGrid, y  , x-1) +
+                    checkPoint(prevGrid, y  , x+1) +
+                    checkPoint(prevGrid, y+1, x-1) +
+                    checkPoint(prevGrid, y+1, x  ) +
+                    checkPoint(prevGrid, y+1, x+1);
+            if (numNeighbours < 2) {
+                grid.set(y, x, false);
+            } else if (numNeighbours == 2) {
+                // Do nothing.
+            } else if (numNeighbours == 3) {
+                grid.set(y, x, true);
+            } else {
+                grid.set(y, x, false);
+            }
+        }
+    }
+}
+
+int main() {
+    Grid<bool> grid;
+
+    std::string filepath;
+    std::cout << "file: ";
+    std::cin >> filepath;
+    std::ifstream input;
+    input.open(filepath);
+    int h, w;
+    input >> h >> w;
+    grid.resize(h, w);
+
+    for (int y = 0; y < grid.numRows(); y++) {
+        std::string line;
+        std::getline(input, line);
+        for (int x = 0; x < grid.numCols(); x++) {
+            grid.set(y, x, line[x] == 'X');
+        }
+    }
+    input.close();
+
+    char prompt;
+    bool running = true;
+    while (running && (std::cout << "[a]nimate, [t]ick, [q]uit: ") && std::cin >> prompt) {
+        switch (prompt) {
+        case 'a':
+            while (true) {
+                clearConsole();
+                std::cout << std::endl;
+                printGrid(grid);
+                pause(100);
+                simulate(grid);
+            }
+        case 't':
+            simulate(grid);
+            printGrid(grid);
+            break;
+        case 'q':
+            running = false;
+            break;
+        }
+    }
+}
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