Tetrix Example | Qt Widgets 5.13.0

Qt 5.13 | Qt Widgets | Tetrix Example

Qt 5.13.0 Reference Documentation

# Tetrix Example

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      #include "tetrixpiece.h"

      #include <QtCore>

      void TetrixPiece::setRandomShape()
      {
          setShape(TetrixShape(QRandomGenerator::global()->bounded(7) + 1));
      }

      void TetrixPiece::setShape(TetrixShape shape)
      {
          static const int coordsTable[8][4][2] = {
              { { 0, 0 },   { 0, 0 },   { 0, 0 },   { 0, 0 } },
              { { 0, -1 },  { 0, 0 },   { -1, 0 },  { -1, 1 } },
              { { 0, -1 },  { 0, 0 },   { 1, 0 },   { 1, 1 } },
              { { 0, -1 },  { 0, 0 },   { 0, 1 },   { 0, 2 } },
              { { -1, 0 },  { 0, 0 },   { 1, 0 },   { 0, 1 } },
              { { 0, 0 },   { 1, 0 },   { 0, 1 },   { 1, 1 } },
              { { -1, -1 }, { 0, -1 },  { 0, 0 },   { 0, 1 } },
              { { 1, -1 },  { 0, -1 },  { 0, 0 },   { 0, 1 } }
          };

          for (int i = 0; i < 4 ; i++) {
              for (int j = 0; j < 2; ++j)
                  coords[i][j] = coordsTable[shape][i][j];
          }
          pieceShape = shape;
      }

      int TetrixPiece::minX() const
      {
          int min = coords[0][0];
          for (int i = 1; i < 4; ++i)
              min = qMin(min, coords[i][0]);
          return min;
      }

      int TetrixPiece::maxX() const
      {
          int max = coords[0][0];
          for (int i = 1; i < 4; ++i)
              max = qMax(max, coords[i][0]);
          return max;
      }

      int TetrixPiece::minY() const
      {
          int min = coords[0][1];
          for (int i = 1; i < 4; ++i)
              min = qMin(min, coords[i][1]);
          return min;
      }

      int TetrixPiece::maxY() const
      {
          int max = coords[0][1];
          for (int i = 1; i < 4; ++i)
              max = qMax(max, coords[i][1]);
          return max;
      }

      TetrixPiece TetrixPiece::rotatedLeft() const
      {
          if (pieceShape == SquareShape)
              return *this;

          TetrixPiece result;
          result.pieceShape = pieceShape;
          for (int i = 0; i < 4; ++i) {
              result.setX(i, y(i));
              result.setY(i, -x(i));
          }
          return result;
      }

      TetrixPiece TetrixPiece::rotatedRight() const
      {
          if (pieceShape == SquareShape)
              return *this;

          TetrixPiece result;
          result.pieceShape = pieceShape;
          for (int i = 0; i < 4; ++i) {
              result.setX(i, -y(i));
              result.setY(i, x(i));
          }
          return result;
      }