Cover.cs :  » Game » Balder » Coverflow » C# / CSharp Open Source

using System;
using System.Windows;
using System.Windows.Media.Animation;
using Balder.Core;
using Balder.Core.GeometryArtifacts;
using Balder.Core.Materials;

namespace Coverflow{
  public class Cover : Geometry
  {
    public const double CoverWidth = 10d;
    public const double CoverHeight = 10d;
    public const double CoverAngle = 85d;
    public const double CoverMoveDuration = 100d;
    public const double CoverOffset = 10d;

    private Storyboard _moveToLeftStoryboard;
    private Storyboard _moveToRightStoryboard;
    private Storyboard _moveToFrontStoryboard;

    public Cover()
    {
      this.AddVertex(-CoverWidth, -CoverHeight, 0);
      this.AddVertex(CoverWidth, -CoverWidth, 0);
      this.AddVertex(-CoverWidth, CoverHeight, 0);
      this.AddVertex(CoverWidth, CoverWidth, 0);


      this.AddTextureCoordinate(0d, 0d);
      this.AddTextureCoordinate(1d, 0d);
      this.AddTextureCoordinate(0d, 1d);
      this.AddTextureCoordinate(1d, 1d);

      Material material = new Material(new Uri("Empty.png",UriKind.Relative));
      
      Face face1 = this.AddFace(0, 1, 2, 0, 1, 2);
      face1.DoubleSided = true;
      Face face2 = this.AddFace(3, 2, 1, 3, 2, 1);
      face2.DoubleSided = true;
      face1.Material = material;
      face2.Material = material;


      // Move left
      this._moveToLeftStoryboard = new Storyboard();
      var moveToLeftAnimation = new DoubleAnimation();
      moveToLeftAnimation.To = CoverAngle;
      moveToLeftAnimation.Duration = TimeSpan.FromMilliseconds(CoverMoveDuration);
      this._moveToLeftStoryboard.Children.Add(moveToLeftAnimation);
      Storyboard.SetTarget(moveToLeftAnimation, this);
      Storyboard.SetTargetProperty(moveToLeftAnimation, new PropertyPath("(Node.YRotation)"));

      var offsetToLeftAnimation = new DoubleAnimation();
      offsetToLeftAnimation.To = -CoverOffset;
      offsetToLeftAnimation.Duration = TimeSpan.FromMilliseconds(CoverMoveDuration);
      this._moveToLeftStoryboard.Children.Add(offsetToLeftAnimation);
      Storyboard.SetTarget(offsetToLeftAnimation, this);
      Storyboard.SetTargetProperty(offsetToLeftAnimation, new PropertyPath("(Node.XPosition)"));

      var moveLeftBackwardAnimation = new DoubleAnimation();
      moveLeftBackwardAnimation.To = 0;
      moveLeftBackwardAnimation.Duration = TimeSpan.FromMilliseconds(CoverMoveDuration);
      this._moveToLeftStoryboard.Children.Add(moveLeftBackwardAnimation);
      Storyboard.SetTarget(moveLeftBackwardAnimation, this);
      Storyboard.SetTargetProperty(moveLeftBackwardAnimation, new PropertyPath("(Node.ZPosition)"));


      // Move right
      this._moveToRightStoryboard = new Storyboard();
      var moveToRightAnimation = new DoubleAnimation();
      moveToRightAnimation.To = -CoverAngle;
      moveToRightAnimation.Duration = TimeSpan.FromMilliseconds(CoverMoveDuration);
      this._moveToRightStoryboard.Children.Add(moveToRightAnimation);
      Storyboard.SetTarget(moveToRightAnimation, this);
      Storyboard.SetTargetProperty(moveToRightAnimation, new PropertyPath("(Node.YRotation)"));

      var offsetToRightAnimation = new DoubleAnimation();
      offsetToRightAnimation.To = CoverOffset;
      offsetToRightAnimation.Duration = TimeSpan.FromMilliseconds(CoverMoveDuration);
      this._moveToRightStoryboard.Children.Add(offsetToRightAnimation);
      Storyboard.SetTarget(offsetToRightAnimation, this);
      Storyboard.SetTargetProperty(offsetToRightAnimation, new PropertyPath("(Node.XPosition)"));

      var moveRightBackwardAnimation = new DoubleAnimation();
      moveRightBackwardAnimation.To = 0;
      moveRightBackwardAnimation.Duration = TimeSpan.FromMilliseconds(CoverMoveDuration);
      this._moveToRightStoryboard.Children.Add(moveRightBackwardAnimation);
      Storyboard.SetTarget(moveRightBackwardAnimation, this);
      Storyboard.SetTargetProperty(moveRightBackwardAnimation, new PropertyPath("(Node.ZPosition)"));


      // Move front
      this._moveToFrontStoryboard = new Storyboard();
      var moveToFrontAnimation = new DoubleAnimation();
      moveToFrontAnimation.To = 0d;
      moveToFrontAnimation.Duration = TimeSpan.FromMilliseconds(CoverMoveDuration);
      this._moveToFrontStoryboard.Children.Add(moveToFrontAnimation);
      Storyboard.SetTarget(moveToFrontAnimation, this);
      Storyboard.SetTargetProperty(moveToFrontAnimation, new PropertyPath("(Node.YRotation)"));

      var offsetToFrontAnimation = new DoubleAnimation();
      offsetToFrontAnimation.To = 0;
      offsetToFrontAnimation.Duration = TimeSpan.FromMilliseconds(CoverMoveDuration);
      this._moveToFrontStoryboard.Children.Add(offsetToFrontAnimation);
      Storyboard.SetTarget(offsetToFrontAnimation, this);
      Storyboard.SetTargetProperty(offsetToFrontAnimation, new PropertyPath("(Node.XPosition)"));

      var moveForwardAnimation = new DoubleAnimation();
      moveForwardAnimation.To = 20;
      moveForwardAnimation.Duration = TimeSpan.FromMilliseconds(CoverMoveDuration);
      this._moveToFrontStoryboard.Children.Add(moveForwardAnimation);
      Storyboard.SetTarget(moveForwardAnimation, this);
      Storyboard.SetTargetProperty(moveForwardAnimation, new PropertyPath("(Node.ZPosition)"));


    }

    public void MoveToLeft()
    {
      this._moveToLeftStoryboard.Begin();
      this._moveToRightStoryboard.Pause();
      this._moveToFrontStoryboard.Pause();
    }

    public void MoveToFront()
    {
      this._moveToLeftStoryboard.Pause();
      this._moveToRightStoryboard.Pause();
      this._moveToFrontStoryboard.Begin();
    }

    public void MoveToRight()
    {
      this._moveToLeftStoryboard.Pause();
      this._moveToRightStoryboard.Begin();
      this._moveToFrontStoryboard.Pause();
    }
  }
}