public void Update(GameTime gameTime)
{
if (Math.Abs(velocity.X) < 0.1)
{
velocity.X = 0.0f;
}
if (Math.Abs(velocity.Y) < 0.1)
{
velocity.Y = 0.0f;
}
if (Keyboard.GetState().IsKeyDown(Keys.Space) && !jumping && !falling)
{
// Start a jump if one hasn't already been done
jumping = true;
// Y works negatively...
targetJumpHeight = position.Y - MaxJumpHeight;
velocity.Y = -4;
// If close to top speed then enable jump speed boost...
if (velocity.X > TopSpeed - 0.001)
{
velocity.X *= 1.1f;
}
}
else if (jumping)
{
// velocity.Y = velocity.Y * JumpAcceleration;
if (position.Y < targetJumpHeight)
{
jumping = false;
falling = true;
velocity.Y = 1f;
}
else
{
velocity.Y = velocity.Y * Gravity;
}
}
else if (Keyboard.GetState().IsKeyDown(Keys.Left) && !jumping && !falling)
{
if (velocity.X > 0)
{
velocity.X = 0;
}
if (Math.Abs(velocity.X) < 0.001)
{
velocity.X = -1;
}
velocity.X *= Acceleration;
if (Math.Abs(velocity.X) > TopSpeed)
{
velocity.X = Math.Sign(velocity.X) * TopSpeed;
}
direction = Direction.Left;
}
else if (Keyboard.GetState().IsKeyDown(Keys.Right) && !jumping && !falling)
{
if (direction == Direction.Left)
{
velocity.X = 0;
}
if (Math.Abs(velocity.X) < 0.001)
{
velocity.X = 1;
}
velocity.X *= Acceleration;
if (Math.Abs(velocity.X) > TopSpeed)
{
velocity.X = Math.Sign(velocity.X) * TopSpeed;
}
direction = Direction.Right;
}
else if (!jumping && !falling)
{
velocity.X = velocity.X * Deccelleration;
}
if (falling)
{
velocity.Y *= Gravity;
if (velocity.Y > TerminalVelocity)
{
velocity.Y = TerminalVelocity;
}
}
var collisionChecks =
level.CheckCollision(ProjectedBounds);
if (velocity.X < 0 && collisionChecks.Left ||
velocity.X > 0 && collisionChecks.Right)
{
velocity.X = 0;
}
else
{
position.X = position.X + velocity.X;
}
if (collisionChecks.Top && !collisionChecks.Bottom)
{
jumping = false;
falling = true;
velocity.Y = 2.0f;
position.Y = ((int)(position.Y + velocity.Y) / 16) * 16;
}
else if (!collisionChecks.Bottom)
{
if (!jumping && !falling)
{
velocity.X = velocity.X * 0.2f;
falling = true;
velocity.Y = 2.0f;
}
position.Y = position.Y + velocity.Y;
}
else
{
falling = false;
jumping = false;
velocity.Y = 0;
}
if (!screenSpace.IsOutOfBounds(Bounds))
{
gameState.LivesRemaining--;
screenController.GoToRetryLevel();
return;
}
if (state.Evidence.Collides(Bounds))
{
state.EvidenceRetrieved = true;
}
foreach (var enemy in state.Enemies)
{
if (enemy.Collides(Bounds))
{
gameState.LivesRemaining--;
screenController.GoToRetryLevel();
return;
}
}
if (state.EvidenceRetrieved && state.Door.Collides(Bounds))
{
gameState.CurrentLevel++;
screenController.GoToProgress();
return;
}
}