}//eom
#endregion
#region Game Methods
protected override void Initialize()
{
graphics.PreferredBackBufferWidth = WindowWidth;
graphics.PreferredBackBufferHeight = WindowHeight;
graphics.ApplyChanges();
gameBoundingBox = new Rectangle(0, 0, WindowWidth, WindowHeight);
drawingState = DrawingState.Initialize;
transformToggle = TransformToggle.Shift;
twoDObject = new TwoDObject(Grid_Center, Vector2.Zero, Vector2.Zero);
basicEffect = new BasicEffect(graphics.GraphicsDevice)
{
VertexColorEnabled = true,
Projection = Matrix.CreateOrthographicOffCenter
(0, graphics.GraphicsDevice.Viewport.Width, // left, right
graphics.GraphicsDevice.Viewport.Height, 0, // bottom, top
0, 1) // near, far plane
};
SetVertices();
base.Initialize();
}//eom
}//eom
protected override void Update(GameTime gameTime)
{
InputKeyManager.Triggers currentKeys = InputKeyManager.Read();
switch (drawingState)
{
case DrawingState.Initialize:
// initialize - set drawingState to Drawing
// user input to change shift and scale
if ((currentKeys & InputKeyManager.Triggers.UpArrow) != 0)
{
if (transformToggle == TransformToggle.Shift)
{
shiftY += 1.0f;
} //end if
else
{
scaleY += 1.0f;
if (scaleY == 0)
{
scaleY = 1;
}
} //end else
} //end if
if ((currentKeys & InputKeyManager.Triggers.DownArrow) != 0)
{
if (transformToggle == TransformToggle.Shift)
{
shiftY -= 1.0f;
} //end if
else
{
scaleY -= 1.0f;
if (scaleY == 0)
{
scaleY = 1;
}
} //end else
} //end if
if ((currentKeys & InputKeyManager.Triggers.LeftArrow) != 0)
{
if (transformToggle == TransformToggle.Shift)
{
shiftX -= 1.0f;
} //end if
else
{
scaleX -= 1.0f;
if (scaleX == 0)
{
scaleX = 1;
}
} //end else
} //end if
if ((currentKeys & InputKeyManager.Triggers.RightArrow) != 0)
{
if (transformToggle == TransformToggle.Shift)
{
shiftX += 1.0f;
} //end if
else
{
scaleX += 1.0f;
if (scaleX == 0)
{
scaleX = 1;
}
} //end else
} //end if
if ((currentKeys & InputKeyManager.Triggers.Toggle) != 0)
{
if (transformToggle == TransformToggle.Shift)
{
transformToggle = TransformToggle.Scale;
} //end if
else
{
transformToggle = TransformToggle.Shift;
} //end else
} //end if
// press spacebar to start the game
if ((currentKeys & InputKeyManager.Triggers.Fire) != 0)
{
twoDObject.Scale = new Vector2(scaleX, scaleY);
twoDObject.Shift = new Vector2(shiftX, shiftY);
drawingState = DrawingState.Drawing;
} //end if
if ((currentKeys & InputKeyManager.Triggers.ExitLevel) != 0)
{
drawingState = DrawingState.Reset;
} //end if
break;
case DrawingState.Drawing:
// draw objects
// user input to transform the twoDObject
twoDObject.Update(gameTime);
SetVertices();
// pause
drawingState = DrawingState.Initialize;
// reset
if ((currentKeys & InputKeyManager.Triggers.ExitLevel) != 0)
{
drawingState = DrawingState.Reset;
} //end if
break;
case DrawingState.Paused:
// drawing is paused
break;
case DrawingState.Reset:
// reset the drawing
if ((currentKeys & InputKeyManager.Triggers.Reset) != 0)
{
twoDObject = new TwoDObject(Grid_Center, Vector2.Zero, Vector2.Zero);
twoDObject.LoadContent(Content);
shiftX = 0;
shiftY = 0;
scaleX = 1;
scaleY = 1;
transformToggle = TransformToggle.Shift;
SetVertices();
drawingState = DrawingState.Initialize;
} //end if
if ((currentKeys & InputKeyManager.Triggers.Quit) != 0)
{
drawingState = DrawingState.Done;
} //end if
break;
case DrawingState.Done:
// finished - exit
this.Exit();
break;
} //end switch
base.Update(gameTime);
} //eom