/// <summary>
/// Checks if the player hits the ground or a planet.
/// </summary>
/// <param name="p">The player.</param>
private void CheckAirCollision(Player p)
{
if (CollidesWithBorders(p))
{
PlacePlayerInsideLevel(p);
if (PhysicsEngine.CollidesWithBottomBorder(p, model.Terrain))
{
p.IsStandingOn = GroundTypes.Ground;
}
}
p.Position += p.TotalVelocity; //Check if next position collides with terrain
bool collision = CollisionEngine.IntersectPixels(p.WorldTransform, (int)p.Size.X, (int)p.Size.Y, p.ColorData, model.Terrain);
//bool collision = CollisionEngine.BoundingBoxTerrainCollision(p.BoundingBox, model.Terrain);
if (collision) //check player vs terrain
{
Rectangle bottomHalf = PhysicsEngine.GetBottomHalf(p.BoundingBox);
if (BunnyGame.DebugMode)
{
model.View.DrawRectangle(bottomHalf, Color.Green);
}
bool bottomCollision = CollisionEngine.BoundingBoxTerrainCollision(bottomHalf, model.Terrain);
p.Position -= p.TotalVelocity;
if (bottomCollision)
{ //bottom half collides with terrain
PlacePlayerOnGround(p);
}
else
{ //top half collides with terrain
p.SelfVelocity = -p.SelfVelocity;
p.Velocity = -p.Velocity;
}
}
else
{ //Check player vs. planets
Planet planet = CollidesWithPlanet(p);
if (planet != null)
{
PlacePlayerOnPlanet(p, planet);
collision = true;
}
if (!collision)
{
p.Position -= p.TotalVelocity;
}
}
}
/// <summary>
/// Places an entity in the level so its bounding box is fully inside the level and not colliding with the terrain.
/// </summary>
/// <param name="e">The entity to be placed.</param>
public void PlaceEntity(Entity e)
{
int timeOutCounter = 100;
bool freespaceFound = true;
e.Position = new Vector2(rand.Next(Terrain.Width), rand.Next(Terrain.Height));
do
{
if (CollisionEngine.BoundingBoxTerrainCollision(e.BoundingBox, Terrain) || !Terrain.IsRectangleClear(e.BoundingBox))
{
freespaceFound = false;
}
else
{
foreach (Entity e2 in EntityList)
{
if (e.BoundingBox.Intersects(e2.BoundingBox))
{
freespaceFound = false;
}
}
}
timeOutCounter--;
if (timeOutCounter == 0)
{
DestroyCircle((int)e.Position.X, (int)e.Position.Y, (int)(MathHelper.Max(e.Size.X, e.Size.Y) / 2));
freespaceFound = true;
}
if (!freespaceFound)
{
e.Position -= new Vector2(0, e.Size.Y / 2);
if (e.Position.Y - e.Origin.Y < 0)
{
e.Position = new Vector2(rand.Next(Terrain.Width), rand.Next(Terrain.Height));
}
}
} while (!freespaceFound);
}