/// <summary>
/// Updates the game state
/// </summary>
public void UpdateGame()
{
#region Step 4a. Update Rocket control
mRocket.RotateAngleInRadian +=
MathHelper.ToRadians(InputWrapper.ThumbSticks.Right.X);
mRocket.Position += InputWrapper.ThumbSticks.Left;
#endregion
#region Step 4b. Update net in flight
/// Set net to flight
if (InputWrapper.Buttons.A == ButtonState.Pressed)
{
mNetInFlight = true;
mNet.RotateAngleInRadian = mRocket.RotateAngleInRadian;
mNet.Position = mRocket.Position;
mNetVelocity = ShowVector.RotateVectorByAngle(
mRocketInitDirection, mNet.RotateAngleInRadian) * mNetSpeed;
}
#endregion
#region Step 4c. Update bee respawn
if (!mInsectPreset)
{
float x = 15f + ((float)Game1.sRan.NextDouble() * 30f);
float y = 15f + ((float)Game1.sRan.NextDouble() * 30f);
mInsect.Position = new Vector2(x, y);
mInsectPreset = true;
}
#endregion
#region Step 5. Inter-object interaction: Net in flight and collision with insect
if (mNetInFlight)
{
mNet.Position += mNetVelocity;
if (mNet.PrimitivesTouches(mInsect))
{
mInsectPreset = false;
mNetInFlight = false;
mNumInsectShot++;
}
if ((Camera.CollidedWithCameraWindow(mNet) !=
Camera.CameraWindowCollisionStatus.InsideWindow))
{
mNetInFlight = false;
mNumMissed++;
}
}
#endregion
}
public bool PixelTouches(TexturedPrimitive otherPrim, out Vector2 collidePoint)
{
bool touches = PrimitivesTouches(otherPrim);
collidePoint = Position;
if (touches)
{
bool pixelTouch = false;
#region Step 3a.
Vector2 myXDir = ShowVector.RotateVectorByAngle(Vector2.UnitX, RotateAngleInRadian);
Vector2 myYDir = ShowVector.RotateVectorByAngle(Vector2.UnitY, RotateAngleInRadian);
Vector2 otherXDir = ShowVector.RotateVectorByAngle(Vector2.UnitX, otherPrim.RotateAngleInRadian);
Vector2 otherYDir = ShowVector.RotateVectorByAngle(Vector2.UnitY, otherPrim.RotateAngleInRadian);
#endregion
#region Step 3b.
int i = 0;
while ((!pixelTouch) && (i < mImage.Width))
{
int j = 0;
while ((!pixelTouch) && (j < mImage.Height))
{
collidePoint = IndexToCameraPosition(i, j, myXDir, myYDir);
Color myColor = GetColor(i, j);
if (myColor.A > 0)
{
Vector2 otherIndex = otherPrim.CameraPositionToIndex(collidePoint, otherXDir, otherYDir);
int xMin = (int)otherIndex.X;
int yMin = (int)otherIndex.Y;
if ((xMin >= 0) && (xMin < otherPrim.mImage.Width) &&
(yMin >= 0) && (yMin < otherPrim.mImage.Height))
{
pixelTouch = (otherPrim.GetColor(xMin, yMin).A > 0);
}
}
j++;
}
i++;
}
#endregion
touches = pixelTouch;
}
return(touches);
}
/// <summary>
/// Allows the game to run logic such as updating the world,
/// checking for collisions, gathering input, and playing audio.
/// </summary>
public void UpdateGame()
{
#region Step 3a. Change current selected vector
if (InputWrapper.Buttons.A == ButtonState.Pressed)
{
mCurrentLocator = mPa;
}
else if (InputWrapper.Buttons.B == ButtonState.Pressed)
{
mCurrentLocator = mPb;
}
else if (InputWrapper.Buttons.X == ButtonState.Pressed)
{
mCurrentLocator = mPx;
}
else if (InputWrapper.Buttons.Y == ButtonState.Pressed)
{
mCurrentLocator = mPy;
}
#endregion
#region Step 3b. Move Vector
// Change the current locator position
mCurrentLocator.Position += InputWrapper.ThumbSticks.Right;
#endregion
#region Step 3c. Rotate Vector
// Left thumbstick-X rotates the vector at Py
float rotateYByRadian = MathHelper.ToRadians(
InputWrapper.ThumbSticks.Left.X);
#endregion
#region Step 3d. Increase/Decrease the length of vector
// Left thumbstick-Y increase/decrease the length of vector at Py
float vecYLen = mVectorAtPy.Length();
vecYLen += InputWrapper.ThumbSticks.Left.Y;
#endregion
#region Step 3e. Compute vector changes
// Compute the rotated direction of vector at Py
mVectorAtPy = ShowVector.RotateVectorByAngle(mVectorAtPy, rotateYByRadian);
mVectorAtPy.Normalize(); // Normalize vectorATY to size of 1f
mVectorAtPy *= vecYLen; // Scale the vector to the new size
#endregion
}
/// <summary>
/// This is called when the game should draw itself.
/// </summary
public void DrawGame()
{
// Drawing the vectors
Vector2 v = mPb.Position - mPa.Position; // Vector V is from Pa to Pb
// Draw Vector-V at Pa, and Px
ShowVector.DrawFromTo(mPa.Position, mPb.Position);
ShowVector.DrawPointVector(mPx.Position, v);
// Draw VectorAtY at Py
ShowVector.DrawPointVector(mPy.Position, mVectorAtPy);
mPa.Draw();
mPb.Draw();
mPx.Draw();
mPy.Draw();
// Print out text message to echo status
FontSupport.PrintStatus("Locator Positions: A=" + mPa.Position + " B=" + mPb.Position, null);
}
