/Samples/Blocks/Tutorials.cs

using Delta.Engine;

using Delta.InputSystem;

using Delta.Multimedia;

using Delta.Rendering.Basics.Fonts;

using Delta.Rendering.Basics.Materials;

using Delta.Rendering.Enums;

using Delta.Utilities.Datatypes;



namespace Blocks

{

	/// <summary>

	/// Tutorial for the Blocks game in just 50 lines of code (plus some comment

	/// lines). Shows up in the SampleBrowser since this file is named Tutorials.

	/// </summary>

	public class Tutorials

	{

		#region Tutorial

		/// <summary>

		/// Tutorial: Blocks game tutorial

		/// Difficulty: Medium

		/// Description: This is just the Tutorial for Blocks in 50 lines of code

		/// (70 with comments). The full game is in the Game class.

		/// Image: http://DeltaEngine.net/Icons/Blocks.png

		/// </summary>

		public static void SimpleBlocksTutorial()

		{

			var background = new Material2D("BlocksBackground");

			background.DrawLayer = RenderLayer.Background;

			var block = new Material2D("Block");

			var logo = new Material2D("BlocksLogo");

			var sound = new Sound("DefaultSound");

			// Define a field of 9x9 blocks

			const int FieldWidth = 9, FieldHeight = 9;

			bool[,] field = new bool[FieldWidth, FieldHeight];

			int currentBlockX = 4, currentBlockY = 0;

			Rectangle fieldRect = new Rectangle(0.2f, 0.2f, 0.6f, 0.6f);

			Application.Start(delegate

			{

				// Move left right depending on where the user touched the screen

				float inputX = 0.5f;

				if (Input.Touch.TouchReleased)

					inputX = Input.Touch.Position.X;

				// Note: Also supporting Mouse and Keyboard input now ;)

				if ((inputX < 0.45f || Input.Keyboard.CursorLeftReleased) &&

					currentBlockX > 0)

					currentBlockX--;

				else if ((inputX > 0.55f || Input.Keyboard.CursorRightReleased) &&

					currentBlockX < FieldWidth - 1)

					currentBlockX++;

				// Only handle this every 0.25 seconds (4 times per sec).

				if (Time.CheckEvery(0.25f))

				{

					// Check if we can move block one down

					if (currentBlockY < FieldHeight - 1 &&

						field[currentBlockX, currentBlockY + 1] == false)

					{

						currentBlockY++;

					}

					// Otherwise fix this block and create a new one at the top

					else

					{

						sound.Play();

						field[currentBlockX, currentBlockY] = true;

						currentBlockX = 4;

						currentBlockY = 0;

						// Quick check if the bottom line is now full

						int blocksInLine = 0;

						for (int x = 0; x < FieldWidth; x++)

							if (field[x, FieldHeight - 1])

								blocksInLine++;

						if (blocksInLine == FieldWidth)

						{

							// Move everything one down (we have to do it upside down)!

							for (int y = FieldHeight - 1; y > 0; y--)

								for (int x = 0; x < FieldWidth; x++)

									field[x, y] = field[x, y - 1];

						}

					} // else

				} // if



				// Do all drawing, first the background

				background.Draw(Rectangle.One);

				// And then draw all field blocks

				for (int x = 0; x < FieldWidth; x++)

					for (int y = 0; y < FieldHeight; y++)

						if (field[x, y])

							block.Draw(fieldRect.GetInnerRectangle(new Rectangle(

								x / (float)FieldWidth, y / (float)FieldHeight,

								1.0f / (float)FieldWidth, 1.0f / (float)FieldHeight)));

				// And finally also add the current block

				block.Draw(fieldRect.GetInnerRectangle(new Rectangle(

					currentBlockX / (float)FieldWidth,

					currentBlockY / (float)FieldHeight,

					1.0f / (float)FieldWidth, 1.0f / (float)FieldHeight)));



				// Draw logo in the bottom right

				Font.DrawTopLeftInformation(

					"This is not the full Blocks game, just the tutorial. Please " +

					"check the v0.9.0 release for the full game.");

				logo.Draw(new Rectangle(ScreenSpace.DrawArea.BottomRight - logo.Size,

					logo.Size));

			});

		}

		#endregion

	}

}