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tetrixpiece.cpp Example File
widgets/tetrix/tetrixpiece.cpp

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 #include <QtCore>

 #include <stdlib.h>

 #include "tetrixpiece.h"

 void TetrixPiece::setRandomShape()
 {
     setShape(TetrixShape(qrand() % 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;
 }

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