float vi = 0; // vi - initial velocity
#endregion Fields
#region Methods
// Apply the rules of gravity
public void Apply(ref Vector2 spritepos, GameTime gameTime, bool isOnGround)
{
// Is the player jumping up
if (direction == LevelLibrary.Directions.up)
{
// Apply the velocity
spritepos.Y += vi;
// Erode the velocity (it's negative at the mo')
vi += gravityStrength;
// Once we reach zero(ish) velocity we will start to come back down
if (vi >= 0f)
{
// Now headed down
direction = LevelLibrary.Directions.down;
vi = 1;
}
}
else if (direction == LevelLibrary.Directions.down)
{
// Apply the velocity
spritepos.Y += vi;
// This time increase velocity as speed increases over time
vi += gravityStrength;
}
// If we are not moving
else if (direction == LevelLibrary.Directions.none && isOnGround == false)
{
// Apply the velocity
spritepos.Y += vi;
// If so we will start to fall
direction = LevelLibrary.Directions.down;
// Increase at rate of fall
vi = gravityStrength;
}
}
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Read the keypresses
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
public void UpdateInput(GameTime gameTime, Camera camera)
{
currentDirection = LevelLibrary.Directions.none;
jumpKeyPressed = false;
KeyboardState newState = Keyboard.GetState();
camera.Update(gameTime, newState, oldState);
// Is the Q key down?
if (newState.IsKeyDown(jumpKeyMapping))
{
jumpKeyPressed = true;
}
else if (newState.IsKeyDown(leftKeyMapping))
{
currentDirection = LevelLibrary.Directions.left;
}
else if (newState.IsKeyDown(rightKeyMapping))
{
currentDirection = LevelLibrary.Directions.right;
}
else if (newState.IsKeyDown(exitKeyMapping))
{
exitKeyPressed = true;
}
else if (newState.IsKeyDown(fullKeyMapping))
{
fullScreenPressed = true;
}
// Update saved state.
oldState = newState;
}
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Initialise method
// Get the current state of the keyboard; any keys pressed
// Set the direction to static
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
public Input()
{
leftKeyMapping = Keys.N;
rightKeyMapping = Keys.M;
jumpKeyMapping = Keys.Space;
exitKeyMapping = Keys.Escape;
fullKeyMapping = Keys.F;
oldState = Keyboard.GetState();
currentDirection = LevelLibrary.Directions.none;
}
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Initialise method
// animation - texture atlas of all the animation frames
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
public void Initialize(LevelLibrary.SpriteAnimator animation, Vector2 startPosition, int xSize, int ySize)
{
PlayerAnimation = animation;
// Set the starting position of the player around the middle of the screen and to the back
position = startPosition;
direction = LevelLibrary.Directions.none;
currentSpeed = 1f;
gravity = new LevelLibrary.Gravity();
gravity.windowHeight = ySize;
gravity.objectHeight = PlayerAnimation.FrameHeight;
// Set the player health
Health = 100;
Lives = 3;
// Can I hover
hoverAbility = false;
PlayerAnimation.Active = true;
PlayerAnimation.Position = Position;
}
public void Initialize(Texture2D textureLeft, Texture2D textureRight, Vector2 position,
int frameWidth, int frameHeight, int frameCount,
int frametime, Color color, float scale, bool looping)
{
// Keep a local copy of the values passed in
this.color = color;
this.FrameWidth = frameWidth;
this.FrameHeight = frameHeight;
this.frameCount = frameCount;
this.frameTime = frametime;
this.scale = scale;
Looping = looping;
Position = position;
spriteStripLeft = textureLeft;
spriteStripRight = textureRight;
direction = LevelLibrary.Directions.right;
currentFrame = 0;
// Set the Animation to active by default
Active = true;
Animating = true;
}
// Handle player key presses
private void UpdatePlayerSpeedAndDirection(bool jumpKey, bool leftKey, bool rightKey)
{
// We're jumping so set our velocity to upwards
if (jumpKey == true && !jumping)
{
jumping = true;
gravity.SetVelocity(jumpPower, LevelLibrary.Directions.up);
}
// Left key press
if (leftKey == true)
{
// Not moving - start moving
if (direction == LevelLibrary.Directions.none)
{
currentSpeed = initialSpeed;
direction = LevelLibrary.Directions.left;
}
else if (direction == LevelLibrary.Directions.left)
{
// Allow increase in speed up until max speed
if (currentSpeed < maxSpeed)
{
currentSpeed++;
}
}
else
{
currentSpeed--;
if (currentSpeed <= 1)
{
direction = LevelLibrary.Directions.none;
}
}
}
// Right key press
else if (rightKey == true)
{
// Not moving - start moving
if (direction == LevelLibrary.Directions.none)
{
currentSpeed = initialSpeed;
direction = LevelLibrary.Directions.right;
}
else if (direction == LevelLibrary.Directions.right)
{
// Allow increase in speed up until max speed
if (currentSpeed < maxSpeed)
{
currentSpeed++;
}
}
else
{
currentSpeed--;
if (currentSpeed <= 1)
{
direction = LevelLibrary.Directions.none;
}
}
}
else
{
// Player slows down if they don't press a key
if (currentSpeed > 0)
{
currentSpeed -= 0.1f;
}
}
}
public void SetVelocity(float v, LevelLibrary.Directions dir)
{
vi = v;
direction = dir;
}
