public AnimatedSprite(int totalFrames, string textureFileName, float fps)
{
this.totalFrames = totalFrames;
this.textureFileName = textureFileName;
texture = GameClass.LoadTextureData(textureFileName);
this.frameHeight = texture.Height;
currentFrame = 0;
frameWidth = (int)(texture.Width / totalFrames);
this.fps = fps;
this.animationType = SpriteAnimationType.Repeating;
animationDirection = SpriteAnimationDirection.Forward;
}
public void Update(GameTime gameTime)
{
frameTimer += (float)gameTime.ElapsedGameTime.TotalSeconds; //update frameTimer with current elapsed time.
if (frameTimer > (float)(1 / fps)) //if its time to animate to the next frame.
{
frameTimer = 0.0f;
switch (animationType)
{
case SpriteAnimationType.Repeating: //sprite animates to the end of it's frames, and then starts over.
animationDirection = SpriteAnimationDirection.Forward;
if (!(currentFrame > totalFrames - 2))
{
currentFrame += 1;
}
else
{
currentFrame = 0;
}
break;
case SpriteAnimationType.AnimateOnceMaintainFirst: //sprite animates to the end of it's frames once, goes back to it's first frame, and then stops.
{
animationDirection = SpriteAnimationDirection.Forward;
if (!(currentFrame > totalFrames - 2))
{
currentFrame += 1;
singleAnimationFinished = false;
}
else
{
currentFrame = 0;
singleAnimationFinished = true;
}
break;
}
case SpriteAnimationType.AnimateOnceMaintainLast: //sprite animates to the end of it's frames once, and stops at the last frame.
{
animationDirection = 0;
if ((currentFrame < totalFrames - 1))
{
currentFrame += 1;
singleAnimationFinished = false;
}
else
{
currentFrame = totalFrames - 1;
singleAnimationFinished = true;
}
break;
}
case SpriteAnimationType.RepeatingReverse: //sprite animates backwards indefinitely.
{
animationDirection = SpriteAnimationDirection.Backward;
if ((currentFrame > 0))
{
currentFrame -= 1;
}
else
{
currentFrame = totalFrames - 1;
}
break;
}
case SpriteAnimationType.AlternatingReverse: //sprite animates forward until the end of it's frames, then animates back to the start, and repeats this cycle.
{
if (animationDirection == SpriteAnimationDirection.Forward)
{
if (!(currentFrame > totalFrames - 2))
{
currentFrame += 1;
}
else
{
currentFrame = totalFrames - 1;
animationDirection = SpriteAnimationDirection.Backward;
}
}
else if (animationDirection == SpriteAnimationDirection.Backward)
{
if ((currentFrame > 0))
{
currentFrame -= 1;
}
else
{
currentFrame = 0;
animationDirection = SpriteAnimationDirection.Forward;
}
}
break;
}
}
}
}