// ----------------------- Feng ------------------------------------------------
// check if the rocket runs into a hazard
private void CheckCollision(Hazard theHazard)
{
// wrap the hazard and car with BoundingBox
BoundingBox aHazardBox = new BoundingBox(new Vector3(theHazard.Position.X, theHazard.Position.Y, 0), new Vector3(theHazard.Position.X + (mHazard.Width * .5f), theHazard.Position.Y + ((mHazard.Height) * .5f), 0));
BoundingBox aCarBox = new BoundingBox(new Vector3(mCarPosition.X, mCarPosition.Y, 0), new Vector3(mCarPosition.X + (mCar.Width * .8f), mCarPosition.Y + (mCar.Height * .8f), 0));
BoundingBox aCarBoxPerfect = new BoundingBox(new Vector3(mCarPosition.X, mCarPosition.Y, 0), new Vector3(mCarPosition.X + (mCar.Width * .8f), mCarPosition.Y + (mCar.Height * .8f) * 0.05f, 0));
BoundingBox aHazardBoxPerfect = new BoundingBox(new Vector3(theHazard.Position.X, theHazard.Position.Y + (mHazard.Height * .25f), 0), new Vector3(theHazard.Position.X + (mHazard.Width * .5f), theHazard.Position.Y + ((mHazard.Height) * .5f), 0));
if (aHazardBox.Intersects(aCarBox) == true) // collided
{
if (aHazardBoxPerfect.Intersects(aCarBoxPerfect) == true)
{
mScore += 2;
mHazardsPerfect++;
theHazard.sign = Hazard.Sign.Perfect;
}
else
{
mScore++;
mHazardsGood++;
theHazard.sign = Hazard.Sign.Good;
}
mHazardsCombo++;
hitSE.Play();
theHazard.Visible = false;
theHazard.SignDisplayTime = (double)mHazard.Height / mVelocityY; // show "Perfect" or "Good" in the game scene
}
}
// ----------------------- Tian ---------------------
private void MoveHazard(Hazard theHazard)
{
theHazard.Position.Y += (int)(mVelocityY * deltaTime);
if (theHazard.Position.Y > graphics.GraphicsDevice.Viewport.Height && theHazard.Visible == true)
{
theHazard.Visible = false;
mHazardsCombo = 0;
++mHazardsMiss;
theHazard.sign = Hazard.Sign.Miss; // sign it with "miss" so that a "MISS" can be shown on the screen
theHazard.Position.Y -= mHazard.Height;
theHazard.SignDisplayTime = (double)mHazard.Height / mVelocityY; // set the duration it will be displayed
}
}
private void AddHazard()
{
int aPosition = mLastHazardAtLeft ? 440 : 275; // make every hazard in the different column with the previous one
bool aAddNewHazard = true;
foreach (Hazard aHazard in mHazards)
{
if (aHazard.Visible == false && aHazard.sign == Hazard.Sign.Undecided) //reuse the isolated ones
{
aAddNewHazard = false;
aHazard.Visible = true;
aHazard.Position = new Vector2(aPosition, -mHazard.Height);
break;
}
}
if (aAddNewHazard == true) //no one can be reused
{
// Add a hazard to the different side to the previous one
Hazard aHazard = new Hazard();
aHazard.Position = new Vector2(aPosition, -mHazard.Height);
mHazards.Add(aHazard);
}
}
