public void Reset()
{
CurrentDirection = SpriteAnimDirection.Forward;
CurrentFrame = 0;
CurrentFrameTime = 0;
State = SpriteAnimState.Paused;
}
public SpriteAnim(Texture2D sheet, int row, int numframes, int width, int height, double frametime)
{
SpriteSheet = sheet;
Offset = new Vector2(sheet.Width,sheet.Height)/2f;
NumFrames = numframes;
SheetRow = row;
CellWidth = width;
CellHeight = height;
CurrentFrame = 0;
CurrentFrameTime = 0;
TargetFrameTime = frametime;
Loop = true;
PingPong = false;
CurrentDirection = SpriteAnimDirection.Forward;
State = SpriteAnimState.Paused;
}
public SpriteAnim(Texture2D sheet, int row, int numframes, int width, int height, double frametime)
{
SpriteSheet = sheet;
Offset = new Vector2(sheet.Width, sheet.Height) / 2f;
NumFrames = numframes;
SheetRow = row;
CellWidth = width;
CellHeight = height;
CurrentFrame = 0;
CurrentFrameTime = 0;
TargetFrameTime = frametime;
Loop = true;
PingPong = false;
CurrentDirection = SpriteAnimDirection.Forward;
State = SpriteAnimState.Paused;
}
public void Play()
{
State = SpriteAnimState.Playing;
}
public void Pause()
{
State = SpriteAnimState.Paused;
}
public void Update(GameTime gameTime)
{
if (State != SpriteAnimState.Playing)
{
return;
}
CurrentFrameTime += gameTime.ElapsedGameTime.TotalMilliseconds;
if (CurrentFrameTime < TargetFrameTime)
{
return;
}
CurrentFrameTime = 0;
switch (CurrentDirection)
{
case SpriteAnimDirection.Forward:
CurrentFrame++;
if (CurrentFrame == NumFrames)
{
if (PingPong && NumFrames > 1)
{
CurrentDirection = SpriteAnimDirection.Reverse;
CurrentFrame -= 2;
}
else if (Loop)
{
CurrentFrame = 0;
}
else
{
State = SpriteAnimState.Paused;
CurrentFrame--;
}
}
break;
case SpriteAnimDirection.Reverse:
CurrentFrame--;
if (CurrentFrame == -1)
{
if (PingPong && NumFrames > 1)
{
CurrentDirection = SpriteAnimDirection.Forward;
CurrentFrame = 1;
}
else if (Loop)
{
CurrentFrame = NumFrames - 1;
}
else
{
State = SpriteAnimState.Paused;
CurrentFrame--;
}
}
break;
default:
throw new ArgumentOutOfRangeException();
}
}
public void Pause()
{
State = SpriteAnimState.Paused;
}
public void Play()
{
State = SpriteAnimState.Playing;
}
public void Update(GameTime gameTime)
{
if (State != SpriteAnimState.Playing) return;
CurrentFrameTime += gameTime.ElapsedGameTime.TotalMilliseconds;
if (CurrentFrameTime < TargetFrameTime) return;
CurrentFrameTime = 0;
switch(CurrentDirection)
{
case SpriteAnimDirection.Forward:
CurrentFrame++;
if (CurrentFrame == NumFrames)
{
if (PingPong && NumFrames > 1)
{
CurrentDirection = SpriteAnimDirection.Reverse;
CurrentFrame -= 2;
}
else if (Loop) CurrentFrame = 0;
else { State = SpriteAnimState.Paused;
CurrentFrame--;
}
}
break;
case SpriteAnimDirection.Reverse:
CurrentFrame--;
if (CurrentFrame == -1)
{
if (PingPong && NumFrames > 1)
{
CurrentDirection = SpriteAnimDirection.Forward;
CurrentFrame = 1;
}
else if(Loop) CurrentFrame = NumFrames-1;
else
{
State = SpriteAnimState.Paused;
CurrentFrame--;
}
}
break;
default:
throw new ArgumentOutOfRangeException();
}
}
public void Reset()
{
CurrentDirection = SpriteAnimDirection.Forward;
CurrentFrame = 0;
CurrentFrameTime = 0;
State = SpriteAnimState.Paused;
}
