topical media & game development

topical media & game development

[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

game-xna-intro-XnaTetris-NextBlock.cs / cs


  
  #region Using Statements
  using System;
  using System.Collections.Generic;
  using Microsoft.Xna.Framework;
  using XnaTetris.Graphics;
  using XnaTetris.Helpers;
  #endregion
  
  namespace XnaTetris
  {

<summary> This is a game component that implements IUpdateable. </summary> public partial class NextBlock : Microsoft.Xna.Framework.DrawableGameComponent { #region Constants <summary> Width and height of the preview grid </summary> const int PreviewGridWidth = 5, PreviewGridHeight = 5; #endregion


                  #region Variables

<summary> Remember game for accessing textures and sprites </summary> TetrisGame game = null;

<summary> Next block type we are currently displaying </summary> TetrisGrid.BlockTypes nextBlockType = TetrisGrid.BlockTypes.Empty;

<summary> Set new random block and return the last block type. </summary> <returns></returns> public TetrisGrid.BlockTypes SetNewRandomBlock() { // Generate first next block if not done yet if (nextBlockType == TetrisGrid.BlockTypes.Empty) nextBlockType = (TetrisGrid.BlockTypes) (1+RandomHelper.GetRandomInt(TetrisGrid.NumOfBlockTypes - 1));


                          // Copy over current next and use it for current block
                          TetrisGrid.BlockTypes currentBlockType = nextBlockType;
  
                          // Generate next random block type
                          nextBlockType = (TetrisGrid.BlockTypes)
                                  (1 + RandomHelper.GetRandomInt(TetrisGrid.NumOfBlockTypes - 1));
  
                          return currentBlockType;
                  } // SetNewRandomBlock()

<summary> Rectangle for this element. Set in constructor, used in Draw. </summary> Rectangle nextBlockRect; #endregion


                  #region Constructor
                  public NextBlock(TetrisGame setGame, Rectangle setNextBlockRect)
                          : base(setGame)
                  {
                          game = setGame;
                          nextBlockRect = setNextBlockRect;
                  } // NextBlock(game)
                  #endregion
  
                  #region Draw
                  public override void Draw(GameTime gameTime)
                  {
                          TextureFont.WriteText(nextBlockRect.X + 5, nextBlockRect.Y + 10, "Next:");
  
                          Rectangle gridRect = new Rectangle(
                                  nextBlockRect.X + 5, nextBlockRect.Y + 43,
                                  nextBlockRect.Width - 15, nextBlockRect.Height - 46);
                          int blockWidth = gridRect.Width / PreviewGridWidth;
                          int blockHeight = gridRect.Height / PreviewGridHeight;
  
                          for (int x = 0; x < PreviewGridWidth; x++)
                                  for (int y = 0; y < PreviewGridHeight; y++)
                                  {
                                          int[,] blockData = TetrisGrid.BlockTypeShapesNormal[(int)nextBlockType];
                                          bool isFilled = x > 0 && y > 0 &&
                                                  x - 1 < blockData.GetLength(0) &&
                                                  y - 1 < blockData.GetLength(1) &&
                                                  blockData[x - 1, y - 1] != 0;
                                          game.BlockSprite.Render(new Rectangle(
                                                  gridRect.X + x * blockWidth,
                                                  gridRect.Y + y * blockHeight,
                                                  blockWidth - 1, blockHeight - 1),
                                                  TetrisGrid.BlockColor[isFilled ? (int)nextBlockType : 0]);
                                  } // for for
                  } // Draw(gameTime)
                  #endregion
          } // class NextBlock
  } // namespace XnaTetris

[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

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