/// <summary>
/// Plays a given animation. If the animation is already playing it returns doing nothing.
/// If there is no animation by that name it does nothing.
/// </summary>
/// <param name="animationName">the name of the animation to play</param>
public void play(String animationName)
{
for (int i = 0; i < _animationData.animations.Count; i++)
{
cAnimation a = _animationData.animations[i];
if (a.name == animationName)
{
if (_currentAnimation != null)
{
if (_currentAnimation.Equals(a)) { return; } // if we are already playing this animation dont do anything
}
// Else we need to reset the variables
_currentAnimation = a;
_time = 0;
_currentFrame = _currentAnimation.frames[0];
_curFrame = 0;
_stopped = false;
}
}
}
/// <summary>
/// Standard update loop, only updates if !_stopped
/// </summary>
/// <param name="elapsed">elapsed frame time</param>
public override void update(GameTime gameTime)
{
if (!_stopped)
{
_time += gameTime.ElapsedGameTime.Milliseconds;
if (_time > _currentFrame.l)
{
_curFrame += _animationIncrement;
if (_curFrame >= _currentAnimation.frames.Count || _curFrame<0)
{
if (_currentAnimation.loopType == "repeat") { _curFrame = 0; }
if (_currentAnimation.loopType == "reverse") { _animationIncrement = -_animationIncrement; _curFrame += _animationIncrement; }
if (_currentAnimation.loopType == "none") { _stopped = true; _curFrame -= _animationIncrement; }
}
_currentFrame = _currentAnimation.frames[_curFrame];
_time = 0;
}
}
}
private void parseAnimation(cAnimatedTexture anim, GraphicsDevice gd, ContentManager cm)
{
String textureURL = "";
anim.animations = new List<cAnimation>();
#region XMLParsing
// If the XML document isnt in the correct format that we expect then
// an XmlException will be thrown to alert the user to the fact.
try
{
// Load the XML document into the reader
XmlTextReader reader = new XmlTextReader(anim.URL);
int currentAnim = -1;
int frameLength = 10;
// Loop through all the elements
while (reader.Read())
{
if (reader.NodeType == XmlNodeType.Element)
{
String elementName = reader.Name;
// If its our top-level elemennt
if (elementName == "sprite")
{
// Get the URL for where to load the sprite
reader.MoveToAttribute(0);
if (reader.Name == "url") { anim.texture = cm.Load<Texture2D>(reader.Value); }
}
// If its an animation of the sprite
if (elementName == "animation")
{
cAnimation a = new cAnimation();
a.frames = new List<cFrame>();
// Load all the attributes for this animation
if (reader.HasAttributes)
{
// For all the attributed for this animation
for (int i = 0; i < reader.AttributeCount; i++)
{
reader.MoveToAttribute(i);
// Getting the name of the animation
if (reader.Name == "name")
{
a.name = reader.Value;
}
// Getting its loop type
if (reader.Name == "loop")
{
a.loopType = reader.Value;
}
// Getting the generic length of each frame
if (reader.Name == "frameLength") { frameLength = Int32.Parse(reader.Value); }
}
}
currentAnim = anim.animations.Count;
anim.animations.Add(a);
}
// If its a frame of the animation
if (elementName == "frame")
{
cAnimation a = anim.animations[currentAnim];
// Creating a new frame object
cFrame curFrame = new cFrame();
// Setting the default attributed for the frame
curFrame.l = frameLength;
if (reader.HasAttributes)
{
for (int i = 0; i < reader.AttributeCount; i++)
{
reader.MoveToAttribute(i);
// Getting the protperties of the frame
if (reader.Name == "number") { curFrame.num = Int32.Parse(reader.Value); }
if (reader.Name == "x") { curFrame.x = Int32.Parse(reader.Value); }
if (reader.Name == "y") { curFrame.y = Int32.Parse(reader.Value); }
if (reader.Name == "w") { curFrame.w = Int32.Parse(reader.Value); }
if (reader.Name == "h") { curFrame.h = Int32.Parse(reader.Value); }
if (reader.Name == "l") { curFrame.l = Int32.Parse(reader.Value); }
}
}
a.frames.Add(curFrame);
}
}
}
}
catch (XmlException e)
{
Console.WriteLine("error occured: " + e.Message);
}
#endregion
}