private void AddObstacles(float minDepth)
{
//add the right number of obstacles
int numberToAdd = (int)((RoadSize / car.Diameter - 1) / 2.0f);
//get the min space between obstacles in this section
float minSize = ((RoadSize / numberToAdd) - car.Diameter) / 2.0f;
for (int i = 0; i < numberToAdd; i++)
{
//get a random number in the min size range
float depth = minDepth - ((float)Utility.Rnd.NextDouble() * minSize);
//make sure its in the right range
depth -= (i * (car.Diameter * 2));
//pick right or left side of road
float location = (Utility.Rnd.Next(50) > 25) ? RoadLocationLeft : RoadLocationRight;
//add the obstacle
obstacles.Add(new Obstacle(device, location, obstacleHeight, depth));
}
}
private void OnFrameUpdate()
{
if ((isGameOver) || (!hasGameStarted))
{
return;
}
// First, get the elapsed time
elapsedTime = Utility.Timer(DirectXTimer.GetElapsedTime);
RoadDepth0 += (RoadSpeed * elapsedTime);
RoadDepth1 += (RoadSpeed * elapsedTime);
// We have two "roads" here a top and bottom, check to see where they are located and if
//they exceed their bounds, then swap them.
if (RoadDepth0 > 75.0f)
{
RoadDepth0 = RoadDepth1 - 100.0f;
AddObstacles(RoadDepth0);
}
if (RoadDepth1 > 75.0f)
{
RoadDepth1 = RoadDepth0 - 100.0f;
AddObstacles(RoadDepth1);
}
// Remove any obstacles that are past the car
// Increase the score for each one, and also increase
// the road speed to make the game harder.
Obstacles removeObstacles = new Obstacles();
foreach (Obstacle o in obstacles)
{
if (o.Depth > car.Diameter - (Car.Depth * 2))
{
// Add this obstacle to our list to remove
removeObstacles.Add(o);
// Increase roadspeed
RoadSpeed += RoadSpeedIncrement;
// Make sure the road speed stays below max
if (RoadSpeed >= MaximumRoadSpeed)
{
RoadSpeed = MaximumRoadSpeed;
}
// Increase the car speed as well
car.IncrementSpeed();
// Add the new score
score += (int)(RoadSpeed * (RoadSpeed / car.Speed));
}
}
// Remove the obstacles in the list
foreach (Obstacle o in removeObstacles)
{
obstacles.Remove(o);
// May as well dispose it as well
o.Dispose();
}
removeObstacles.Clear();
// Move our obstacles
foreach (Obstacle o in obstacles)
{
// Update the obstacle, check to see if it hits the car
o.Update(elapsedTime, RoadSpeed);
if (o.IsHittingCar(car.Location, car.Diameter))
{
// If it does hit the car, the game is over.
isGameOver = true;
gameOverTick = System.Environment.TickCount;
// Stop our timer
Utility.Timer(DirectXTimer.Stop);
// Check to see if we want to add this to our high scores list
CheckHighScore();
}
}
car.Update(elapsedTime);
}