74 lines
3.0 KiB
C#
74 lines
3.0 KiB
C#
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using System;
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using Microsoft.Xna.Framework;
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using Microsoft.Xna.Framework.Graphics;
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namespace FarseerPhysics.SamplesFramework
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{
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/// <summary>
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/// The background screen sits behind all the other menu screens.
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/// It draws a background image that remains fixed in place regardless
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/// of whatever transitions the screens on top of it may be doing.
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/// </summary>
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public class BackgroundScreen : GameScreen
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{
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private const float LogoScreenHeightRatio = 0.25f;
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private const float LogoScreenBorderRatio = 0.0375f;
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private const float LogoWidthHeightRatio = 1.4f;
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private Texture2D _backgroundTexture;
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private Rectangle _logoDestination;
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//private Texture2D _logoTexture;
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private Rectangle _viewport;
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/// <summary>
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/// Constructor.
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/// </summary>
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public BackgroundScreen()
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{
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TransitionOnTime = TimeSpan.FromSeconds(0.5);
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TransitionOffTime = TimeSpan.FromSeconds(0.5);
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}
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public override void LoadContent()
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{
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//_logoTexture = ScreenManager.Content.Load<Texture2D>("Common/logo");
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_backgroundTexture = ScreenManager.Content.Load<Texture2D>("Common/gradient");
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Viewport viewport = ScreenManager.GraphicsDevice.Viewport;
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Vector2 logoSize = new Vector2();
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logoSize.Y = viewport.Height * LogoScreenHeightRatio;
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logoSize.X = logoSize.Y * LogoWidthHeightRatio;
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float border = viewport.Height * LogoScreenBorderRatio;
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Vector2 logoPosition = new Vector2(viewport.Width - border - logoSize.X,
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viewport.Height - border - logoSize.Y);
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_logoDestination = new Rectangle((int)logoPosition.X, (int)logoPosition.Y, (int)logoSize.X,
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(int)logoSize.Y);
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_viewport = viewport.Bounds;
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}
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/// <summary>
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/// Updates the background screen. Unlike most screens, this should not
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/// transition off even if it has been covered by another screen: it is
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/// supposed to be covered, after all! This overload forces the
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/// coveredByOtherScreen parameter to false in order to stop the base
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/// Update method wanting to transition off.
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/// </summary>
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public override void Update(GameTime gameTime, bool otherScreenHasFocus,
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bool coveredByOtherScreen)
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{
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base.Update(gameTime, otherScreenHasFocus, false);
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}
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/// <summary>
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/// Draws the background screen.
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/// </summary>
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public override void Draw(GameTime gameTime)
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{
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ScreenManager.SpriteBatch.Begin();
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ScreenManager.SpriteBatch.Draw(_backgroundTexture, _viewport, Color.White);
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//ScreenManager.SpriteBatch.Draw(_logoTexture, _logoDestination, Color.White * 0.6f);
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ScreenManager.SpriteBatch.End();
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}
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}
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}
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