old_block.cs

Beginning C# Game Programming 的源代码

						square2.Location = new Point(square3.Location.X, square3.Location.Y-squareSize);
						square4.Location = new Point(square3.Location.X, square3.Location.Y-2*squareSize);
						break;
				}
					break;
				case BlockTypes.L:
					// Rotate all squares around square 3                
				switch(StatusRotation) {
					case RotationDirections.North:
						StatusRotation = RotationDirections.East;
						square1.Location = new Point(square3.Location.X+squareSize, square3.Location.Y);
						square2.Location = new Point(square3.Location.X+2*squareSize, square3.Location.Y);
						square4.Location = new Point(square3.Location.X, square3.Location.Y+squareSize);
						break;
					case RotationDirections.East:
						StatusRotation = RotationDirections.South;
						square1.Location = new Point(square3.Location.X-squareSize, square3.Location.Y);
						square2.Location = new Point(square3.Location.X, square3.Location.Y+squareSize);
						square4.Location = new Point(square3.Location.X, square3.Location.Y+2*squareSize);
						break;
					case RotationDirections.South:
						StatusRotation = RotationDirections.West;
						square1.Location = new Point(square3.Location.X-2*squareSize, square3.Location.Y);
						square2.Location = new Point(square3.Location.X-squareSize, square3.Location.Y);
						square4.Location = new Point(square3.Location.X, square3.Location.Y-squareSize);
						break;
					case RotationDirections.West:
						StatusRotation = RotationDirections.North;
						square1.Location = new Point(square3.Location.X, square3.Location.Y-2*squareSize);
						square2.Location = new Point(square3.Location.X, square3.Location.Y-squareSize);
						square4.Location = new Point(square3.Location.X+squareSize, square3.Location.Y);
						break;
				}
					break;
				case BlockTypes.T:
				switch(StatusRotation) {
					case RotationDirections.North:
						StatusRotation = RotationDirections.East;
						square1.Location = new Point(square2.Location.X, square2.Location.Y-squareSize);
						square3.Location = new Point(square2.Location.X, square2.Location.Y+squareSize);
						square4.Location = new Point(square2.Location.X-squareSize, square2.Location.Y);
						break;
					case RotationDirections.East:
						StatusRotation = RotationDirections.South;
						square1.Location = new Point(square2.Location.X+squareSize, square2.Location.Y);
						square3.Location = new Point(square2.Location.X-squareSize, square2.Location.Y);
						square4.Location = new Point(square2.Location.X, square2.Location.Y-squareSize);
						break;
					case RotationDirections.South:
						StatusRotation = RotationDirections.West;
						square1.Location = new Point(square2.Location.X, square2.Location.Y+squareSize);
						square3.Location = new Point(square2.Location.X, square2.Location.Y-squareSize);
						square4.Location = new Point(square2.Location.X+squareSize, square2.Location.Y);
						break;
					case RotationDirections.West:
						StatusRotation = RotationDirections.North;
						square1.Location = new Point(square2.Location.X-squareSize, square2.Location.Y);
						square3.Location = new Point(square2.Location.X+squareSize, square2.Location.Y);
						square4.Location = new Point(square2.Location.X, square2.Location.Y+squareSize);
						break;
				}
					break;
				case BlockTypes.Z:
					// Rotate all squares around square 2                
				switch(StatusRotation) {
					case RotationDirections.North:
						StatusRotation = RotationDirections.East;
						square1.Location = new Point(square2.Location.X, square2.Location.Y-squareSize);
						square3.Location = new Point(square2.Location.X-squareSize, square2.Location.Y);
						square4.Location = new Point(square2.Location.X-squareSize, square2.Location.Y+squareSize);
						break;
					case RotationDirections.East:
						StatusRotation = RotationDirections.North;
						square1.Location = new Point(square2.Location.X-squareSize, square2.Location.Y);
						square3.Location = new Point(square2.Location.X, square2.Location.Y+squareSize);
						square4.Location = new Point(square2.Location.X+squareSize, square2.Location.Y+squareSize);
						break;
				}
					break;
				case BlockTypes.S:
					// Rotate all squares around square 2                
				switch(StatusRotation) {
					case RotationDirections.North:
						StatusRotation = RotationDirections.East;
						square1.Location = new Point(square2.Location.X, square2.Location.Y-squareSize);
						square3.Location = new Point(square2.Location.X+squareSize, square2.Location.Y);
						square4.Location = new Point(square2.Location.X+squareSize, square2.Location.Y+squareSize);
						break;
					case RotationDirections.East:
						StatusRotation = RotationDirections.North;
						square1.Location = new Point(square2.Location.X-squareSize, square2.Location.Y);
						square3.Location = new Point(square2.Location.X, square2.Location.Y-squareSize);
						square4.Location = new Point(square2.Location.X+squareSize, square2.Location.Y-squareSize);
						break;
				}
					break;
			}

			// After rotating the squares, test if they overlap other squares.  
			//   If so, return to original position
			if (!(GameField.IsEmpty(square1.Location.X/squareSize, square1.Location.Y/squareSize)&&GameField.IsEmpty(square2.Location.X/squareSize, square2.Location.Y/squareSize)&&GameField.IsEmpty(square3.Location.X/squareSize, square3.Location.Y/squareSize)&&GameField.IsEmpty(square4.Location.X/squareSize, square4.Location.Y/squareSize))) {
				StatusRotation = OldStatusRotation;
				square1.Location = OldPosition1;
				square2.Location = OldPosition2;
				square3.Location = OldPosition3;
				square4.Location = OldPosition4;
			}
			Show(GameField.GraphBackground);
		}

		public bool Down() {
			// If there's no block below the current one, go down         
			if (GameField.IsEmpty(square1.Location.X/squareSize, square1.Location.Y/squareSize+1)&&GameField.IsEmpty(square2.Location.X/squareSize, square2.Location.Y/squareSize+1)&&GameField.IsEmpty(square3.Location.X/squareSize, square3.Location.Y/squareSize+1)&&GameField.IsEmpty(square4.Location.X/squareSize, square4.Location.Y/squareSize+1)) {
				// Hide the block (in the previous position)
				Hide(GameField.GraphBackground);
				// Update the block position
				square1.Location = new Point(square1.Location.X, square1.Location.Y+squareSize);
				square2.Location = new Point(square2.Location.X, square2.Location.Y+squareSize);
				square3.Location = new Point(square3.Location.X, square3.Location.Y+squareSize);
				square4.Location = new Point(square4.Location.X, square4.Location.Y+squareSize);
				// Draw the block in the new position
				Show(GameField.GraphBackground);
				return true;
			}
			else {
				// If there's a block below the current one, doesn't go down 
				// -> put it on the array that controls the game and return FALSE
				GameField.StopSquare(square1, square1.Location.X/squareSize, square1.Location.Y/squareSize);
				GameField.StopSquare(square2, square2.Location.X/squareSize, square2.Location.Y/squareSize);
				GameField.StopSquare(square3, square3.Location.X/squareSize, square3.Location.Y/squareSize);
				GameField.StopSquare(square4, square4.Location.X/squareSize, square4.Location.Y/squareSize);
				return false;
			}
		}

		public bool Right() {
			// If there's no block to the right of the current one, go right         
			if (GameField.IsEmpty(square1.Location.X/squareSize+1, square1.Location.Y/squareSize)&&GameField.IsEmpty(square2.Location.X/squareSize+1, square2.Location.Y/squareSize)&&GameField.IsEmpty(square3.Location.X/squareSize+1, square3.Location.Y/squareSize)&&GameField.IsEmpty(square4.Location.X/squareSize+1, square4.Location.Y/squareSize)) {
				// Hide the block (in the previous position)
				Hide(GameField.GraphBackground);
				// Update the block position
				square1.Location = new Point(square1.Location.X+squareSize, square1.Location.Y);
				square2.Location = new Point(square2.Location.X+squareSize, square2.Location.Y);
				square3.Location = new Point(square3.Location.X+squareSize, square3.Location.Y);
				square4.Location = new Point(square4.Location.X+squareSize, square4.Location.Y);
				// Draw the block in the new position
				Show(GameField.GraphBackground);
				return true;
			}
			else {
				// If there's a block to the right of the current one, 
				// doesn't go right and return FALSE
				return false;
			}
		}

		public bool Left() {
			// If there's no block to the left of the current one, go left    
			if (GameField.IsEmpty(square1.Location.X/squareSize-1, square1.Location.Y/squareSize)&&GameField.IsEmpty(square2.Location.X/squareSize-1, square2.Location.Y/squareSize)&&GameField.IsEmpty(square3.Location.X/squareSize-1, square3.Location.Y/squareSize)&&GameField.IsEmpty(square4.Location.X/squareSize-1, square4.Location.Y/squareSize)) {
				// Hide the block (in the previous position)
				Hide(GameField.GraphBackground);
				// Update the block position
				square1.Location = new Point(square1.Location.X-squareSize, square1.Location.Y);
				square2.Location = new Point(square2.Location.X-squareSize, square2.Location.Y);
				square3.Location = new Point(square3.Location.X-squareSize, square3.Location.Y);
				square4.Location = new Point(square4.Location.X-squareSize, square4.Location.Y);
				// Draw the block in the new position
				Show(GameField.GraphBackground);
				return true;
			}
			else {
				// If there's a block to the left of the current one, 
				// doesn't go left and return FALSE
				return false;
			}
		}

		// Draws each square of the block on the game field
		public void Show(Graphics g) {
			square1.Show(g);
			square2.Show(g);
			square3.Show(g);
			square4.Show(g);
		}

		// Hides each square of the block on the game field
		public void Hide(Graphics g) {
			square1.Hide(g);
			square2.Hide(g);
			square3.Hide(g);
			square4.Hide(g);
		}
	}
}