}//eom
#endregion
#region Game Methods
protected override void Initialize()
{
graphics.PreferredBackBufferWidth = WindowWidth;
graphics.PreferredBackBufferHeight = WindowHeight;
graphics.ApplyChanges();
//Setup Camera
camTarget = new Vector3(0f, 0f, 0f);
camPosition = new Vector3(100f, 100f, 100f);
projectionMatrix = Matrix.CreatePerspectiveFieldOfView(
MathHelper.ToRadians(60f),
GraphicsDevice.Viewport.AspectRatio, 1f, 200f);
viewMatrix = Matrix.CreateLookAt(camPosition, camTarget, Vector3.Up);// Y up
worldMatrix = Matrix.CreateWorld(camTarget, Vector3.Forward, Vector3.Up);
gameState = GameState.Initialize;
transformToggle = TransformToggle.Shift;
threeDObject = new ThreeDObject(camTarget, new Vector3(shiftX, shiftY, shiftZ), new Vector3(scaleX, scaleY, scaleZ));
basicEffect = new BasicEffect(GraphicsDevice);
basicEffect.View = viewMatrix;
basicEffect.Projection = projectionMatrix;
basicEffect.VertexColorEnabled = true;
SetVertices();
SetPoitiveGrid();
SetNegativeGrid();
base.Initialize();
}//eom
}//eom
protected override void Update(GameTime gameTime)
{
InputKeyManager.Triggers currentKeys = InputKeyManager.Read();
switch (gameState)
{
case GameState.Initialize:
// initialize - set drawingState to Drawing
#region 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.Minus) != 0)
{
if (transformToggle == TransformToggle.Shift)
{
shiftZ -= 1.0f;
} //end if
else
{
scaleZ -= 1.0f;
if (scaleZ == 0)
{
scaleZ = 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.Plus) != 0)
{
if (transformToggle == TransformToggle.Shift)
{
shiftZ += 1.0f;
} //end if
else
{
scaleZ += 1.0f;
//if (scaleZ == 0)
// scaleZ = 1;
} //end else
} //end if
#endregion
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)
{
threeDObject.Scale = new Vector3(scaleX, scaleY, scaleZ);
threeDObject.Shift = new Vector3(shiftX, shiftY, shiftZ);
gameState = GameState.Drawing;
} //end if
if ((currentKeys & InputKeyManager.Triggers.Reset) != 0)
{
gameState = GameState.Reset;
} //end if
#region Move Camera
if ((currentKeys & InputKeyManager.Triggers.CamLeft) != 0)
{
camPosition.X -= 5.0f;
} //end if
if ((currentKeys & InputKeyManager.Triggers.CamRight) != 0)
{
camPosition.X += 5.0f;
} //end if
if ((currentKeys & InputKeyManager.Triggers.CamUp) != 0)
{
camPosition.Y += 5.0f;
} //end if
if ((currentKeys & InputKeyManager.Triggers.CamDown) != 0)
{
camPosition.Y -= 5.0f;
} //end if
viewMatrix = Matrix.CreateLookAt(camPosition, camTarget, Vector3.Up);
basicEffect.View = viewMatrix;
#endregion
if ((currentKeys & InputKeyManager.Triggers.ExitLevel) != 0)
{
gameState = GameState.Quit;
} //end if
break;
case GameState.Drawing:
// draw objects
// user input to transform the twoDObject
threeDObject.Update(gameTime);
SetVertices();
// pause
gameState = GameState.Initialize;
// reset
if ((currentKeys & InputKeyManager.Triggers.ExitLevel) != 0)
{
gameState = GameState.Reset;
} //end if
break;
case GameState.Reset:
shiftX = 0;
shiftY = 0;
shiftZ = 0;
scaleX = 1;
scaleY = 1;
scaleZ = 1;
threeDObject = new ThreeDObject(camTarget, new Vector3(shiftX, shiftY, shiftZ), new Vector3(scaleX, scaleY, scaleZ));
threeDObject.LoadContent(Content);
transformToggle = TransformToggle.Shift;
SetVertices();
//rest camera and view
camPosition = new Vector3(100f, 100f, 100f);
basicEffect.View = viewMatrix;
if ((currentKeys & InputKeyManager.Triggers.Quit) != 0)
{
gameState = GameState.Quit;
} //end if
if ((currentKeys & InputKeyManager.Triggers.Reset) != 0)
{
gameState = GameState.Initialize;
} //end if
break;
case GameState.Quit:
// finished - exit
this.Exit();
break;
} //end switch
base.Update(gameTime);
} //eom