// This provides sub classes a hook to enforce restrictions on the camera's position
protected override void RestrictPosition(Vector3 previousPosition)
{
// Get the range of coordinates allowed in the world
float maxX = terrain.MaxX;
float minX = terrain.MinX;
float maxZ = terrain.MaxZ;
float minZ = terrain.MinZ;
float x = Position.X;
float y = Position.Y;
float z = Position.Z;
// Make sure the move won't place the camera outside the world
if (Position.X < minX || Position.X > maxX)
{
x = previousPosition.X;
}
if (Position.Z < minZ || Position.Z > maxZ)
{
z = previousPosition.Z;
}
// Ensure the camera moves along the ground
float height = terrain.GetHeight(x, z) + POSITION_ABOVE_GROUND;
y = height;
Position = new Vector3(x, y, z);
}
private void CheckTerrainCollision(Terrain terrain)
{
float minHeightAllowed = terrain.GetHeight(Position.X, Position.Z);
if (Position.Y < minHeightAllowed)
{
Console.WriteLine("Collided with the ground...");
IsAlive = false;
}
}
private void UpdatePosition(Camera camera, Terrain terrain)
{
// Move in a straight line along the direction the alien is facing
Position += Direction * movementSpeed;
// Keep the alien moving on the terrain
RestrictPositionToTerrainBoundaries(terrain);
// Ensure the alien still appears on the terrain
Position.Y = terrain.GetHeight(Position.X, Position.Z) + POSITION_ABOVE_GROUND;
}
private void LoadAliens()
{
Model alienModel = Game.Content.Load <Model>(@"Models\alien");
Random randomNumberGenerator = (Random)Game.Services.GetService(typeof(Random));
int alienCount = randomNumberGenerator.Next(MIN_ALIEN_COUNT, MAX_ALIEN_COUNT);
aliens = new List <Alien>();
hud.alienRadarCount = alienCount;
for (int i = 0; i < alienCount; i++)
{
// Place each alien at a random point on the terrain
Vector3 position = GetUniqueRandomPointInWorld(randomNumberGenerator);
position.Y = terrain.GetHeight(position.X, position.Z);
Alien alien = new Alien(alienModel, position, Vector3.UnitZ);
aliens.Add(alien);
Console.WriteLine("Alien[" + i + "]: " + alien.Position);
}
}
private void UpdatePosition(Camera camera, Terrain terrain)
{
// Move in a straight line along the direction the alien is facing
Position += Direction * movementSpeed;
// Keep the alien moving on the terrain
RestrictPositionToTerrainBoundaries(terrain);
// Ensure the alien still appears on the terrain
Position.Y = terrain.GetHeight(Position.X, Position.Z) + POSITION_ABOVE_GROUND;
}
private void CheckTerrainCollision(Terrain terrain)
{
float minHeightAllowed = terrain.GetHeight(Position.X, Position.Z);
if (Position.Y < minHeightAllowed)
{
Console.WriteLine("Collided with the ground...");
IsAlive = false;
}
}