public void AddAnimation(string animationKey, string textureName,
CelRange celRange, int celWidth, int celHeight,
int numberOfCels, int framesPerSecond)
{
CelAnimation ca = new CelAnimation(textureName, celRange,
framesPerSecond);
if (!textures.ContainsKey(textureName))
{
textures.Add(textureName, Game.Content.Load <Texture2D>(
contentPath + textureName));
}
ca.CelWidth = celWidth;
ca.CelHeight = celHeight;
ca.NumberOfCels = numberOfCels;
ca.CelsPerRow = textures[textureName].Width / celWidth;
if (animations.ContainsKey(animationKey))
{
animations[animationKey] = ca;
}
else
{
animations.Add(animationKey, ca);
}
}
public void Draw(GameTime gameTime, string animationKey,
SpriteBatch batch, Rectangle position, Color color, SpriteEffects effects)
{
if (!animations.ContainsKey(animationKey))
{
return;
}
CelAnimation ca = animations[animationKey];
//first get our x increase amount
//(add our offset-1 to our current frame)
int xincrease = (ca.Frame + ca.CelRange.FirstCelX - 1);
//now we need to wrap the value so it will loop to the next row
int xwrapped = xincrease % ca.CelsPerRow;
//finally we need to take the product of our wrapped value
//and a cel’s width
int x = xwrapped * ca.CelWidth;
//to determine how much we should increase y, we need to look
//at how much we increased x and do an integer divide
int yincrease = xincrease / ca.CelsPerRow;
//now we can take this increase and add it to
//our Y offset-1 and multiply the sum by our cel height
int y = (yincrease + ca.CelRange.FirstCelY - 1) * ca.CelHeight;
Rectangle cel = new Rectangle(x, y, ca.CelWidth, ca.CelHeight);
batch.Draw(textures[ca.TextureName], position, cel, color, 0.0f, Vector2.Zero, effects, 0.0f);
}
/// <summary>
/// Allows the game component to update itself.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
public override void Update(GameTime gameTime)
{
foreach (KeyValuePair <string, CelAnimation> animation in animations)
{
CelAnimation ca = animation.Value;
if (ca.Paused)
{
continue; //no need to update this animation,check next one
}
ca.TotalElapsedTime +=
(float)gameTime.ElapsedGameTime.TotalSeconds;
if (ca.TotalElapsedTime > ca.TimePerFrame)
{
ca.Frame++;
//min: 0, max: total cels
ca.Frame = ca.Frame % (ca.NumberOfCels);
//reset our timer
ca.TotalElapsedTime -= ca.TimePerFrame;
}
}
base.Update(gameTime);
}
public int GetAnimationFrameHeight(string animationKey)
{
if (!animations.ContainsKey(animationKey))
{
return(-1);
}
CelAnimation ca = animations[animationKey];
return(ca.CelHeight);
}
