Initial commit, some logic added

source/field.cpp

@@ -0,0 +1,180 @@
+#include "field.h"
+
+/*
+Fields:
+    std::vector<std::vector<int>> field;
+
+Private methods: 
+    std::vector<Tile> processLine(const std::vector<Tile> &sourceLine);
+
+    std::vector<Tile> getRow(size_t idx);
+    std::vector<Tile> getColumn(size_t idx);
+    void setRow(size_t idx);
+    void setColumn(size_t idx);
+
+Public methods: 
+    void moveUp();
+    void moveDown();
+    void moveLeft();
+    void moveRight();
+*/
+
+// PRIVATE
+std::vector<Tile> Field::processLine(const std::vector<Tile>& sourceLine, Score &score) {
+    std::vector<Tile> result;
+    Tile pending = 0;
+    bool hasPending = false;
+    
+    for (Tile element : sourceLine) {
+        if (element == 0) continue;
+        
+        if (!hasPending) {
+            pending = element;
+            hasPending = true;
+            continue;
+        }
+        
+        if (element == pending) {
+            result.push_back(pending * 2);
+            score += pending * 2;
+            hasPending = false;
+            pending = 0;
+        } else {
+            result.push_back(pending);
+            pending = element;
+        }
+    }
+    
+    if (hasPending) {
+        result.push_back(pending);
+    }
+    
+    while (result.size() < sourceLine.size()) {
+        result.push_back(0);
+    }
+    
+    return result;
+}
+
+Line Field::getRow(size_t rowIndex) const {
+    return this->field[rowIndex];
+}
+
+std::vector<Tile> Field::getColumn(size_t columnIndex) const {
+    // from top to bottom
+    std::vector<Tile> column;
+    for (size_t i = 0; i < this->FieldSize; ++i) {
+        column.push_back(this->field[i][columnIndex]);
+    }
+    return column;
+}
+
+void Field::setRow(size_t rowIndex, const std::vector<Tile> &line) {
+    this->field[rowIndex] = line;
+}
+
+void Field::setColumn(size_t columnIndex, const std::vector<Tile> &line) {
+    // from top to bottom (same)
+    for (size_t i = 0; i < this->FieldSize; ++i) {
+        this->field[i][columnIndex] = line[i];
+    }
+}
+
+void Field::reset() {
+    this->field.resize(this->FieldSize, std::vector<Tile>(this->FieldSize, 0));
+}
+
+// PUBLIC
+Field::Field(size_t fieldSize) : mt(std::random_device{}()), FieldSize(fieldSize) {
+    this->reset();
+}
+
+void printVector(const std::vector<Tile> &arr) {
+    for (size_t i = 0; i < arr.size(); ++i) {
+        printf("%llu ", arr[i]);
+    }
+    printf("\n");
+}
+
+bool Field::moveUp() {
+    auto oldField = this->field;
+    for (size_t i = 0; i < this->FieldSize; ++i) {
+        std::vector<Tile> column;
+        column = getColumn(i);
+        column = processLine(column, this->score);
+        setColumn(i, column);
+    }
+    return this->field != oldField;
+}
+
+bool Field::moveDown() {
+    auto oldField = this->field;
+    for (size_t i = 0; i < this->FieldSize; ++i) {
+        std::vector<Tile> column;
+        column = getColumn(i);
+        std::reverse(column.begin(), column.end());
+        column = processLine(column, this->score);
+        std::reverse(column.begin(), column.end());
+        setColumn(i, column);
+    }
+    return this->field != oldField; 
+}
+
+bool Field::moveLeft() {
+    auto oldField = this->field;
+    std::vector<Tile> row;
+    for (size_t i = 0; i < this->FieldSize; ++i) {
+        row = getRow(i);
+        row = processLine(row, this->score);
+        setRow(i, row);
+    }
+    return this->field != oldField;
+}
+
+bool Field::moveRight() {
+    auto oldField = this->field;
+    std::vector<Tile> row;
+    for (size_t i = 0; i < this->FieldSize; ++i) {
+        row = getRow(i);
+        std::reverse(row.begin(), row.end());
+        row = processLine(row, this->score);
+        std::reverse(row.begin(), row.end());
+        setRow(i, row);
+    }
+    return this->field != oldField;
+}
+
+
+std::vector<Position> Field::getEmptyTiles() const {
+    std::vector<Position> empty;
+    for (size_t i = 0; i < this->FieldSize; ++i) {
+        for (size_t j = 0; j < this->FieldSize; ++j) {
+            if (this->field[i][j] == 0) {
+                empty.push_back(Position(i, j));
+            }
+        }
+    }
+    return empty;
+}
+
+bool Field::spawnTile(const std::vector<Position> &empty) {
+    if (!empty.empty()) {
+        std::uniform_int_distribution<> dist(0, static_cast<int>(empty.size() - 1));
+        std::uniform_int_distribution<> chance(1, 10);
+        int choice = dist(this->mt);
+        Position spawnPoint = empty[choice];
+        this->field[spawnPoint.x][spawnPoint.y] = ((chance(this->mt) == 10) ? 4 : 2);
+        return true;
+    }
+    return false;
+}
+
+
+void Field::debug() const {
+    for (size_t i = 0; i < this->FieldSize; ++i) {
+        for (size_t j = 0; j < this->FieldSize; ++j) {
+            printf("%5llu ", this->field[i][j]);
+        }
+        printf("\n");
+    }
+}