protected void GenerateMasterFrames()
{
masterFrames = new SpriteSheetKeyFrame[(int)Slices.X, (int)Slices.Y];
for (int y = 0; y < Slices.Y; y++)
{
for (int x = 0; x < Slices.X; x++)
{
masterFrames[x, y] = new SpriteSheetKeyFrame();
}
}
}
public SpriteSheetAnimationClip Generate(string name, Vector2 start, Vector2 end, TimeSpan duration, bool looped)
{
List <SpriteSheetKeyFrame> frames = new List <SpriteSheetKeyFrame>();
SpriteSheetAnimationClip retVal = new SpriteSheetAnimationClip(name, duration, null, looped);
float cnt = 0;
int xIncDec = 1;
int yIncDec = 1;
float xCnt = 0;
float yCnt = 0;
// Are we going to be moving forward or backwards along the
// X axis of the sprite sheet to get the animation frames?
if (start.X > end.X)
{
xIncDec = -1;
xCnt = (start.X - end.X) + 1;
}
else
{
xCnt = (end.X - start.X) + 1;
}
// Are we going to be moving up or down along the
// Y axis of the sprite sheet to get the animation frames?
if (start.Y > end.Y)
{
yIncDec = -1;
yCnt = (start.Y - end.Y) + 1;
}
else
{
yCnt = (end.Y - start.Y) + 1;
}
// This is the base time each frame is made up of.
TimeSpan time = new TimeSpan(duration.Ticks / (long)(xCnt * yCnt));
// This is the size of a cell on the sprite sheet.
Vector2 cellSize = SpriteSheetDimensions / Slices;
// This is used to help calculate the time for each frame.
int frameCount = 0;
// Is this just one line off the sheet?
// if both start and end Y are the same, then it is a horizontal
// line of key frames
if (start.Y == end.Y)
{
int y = (int)start.Y;
for (int x = (int)start.X; xCnt > 0; x += xIncDec, xCnt--)
{
SpriteSheetKeyFrame frame = new SpriteSheetKeyFrame(new Vector2(x * cellSize.X, y * cellSize.Y), new TimeSpan(time.Ticks * frameCount++));
frames.Add(frame);
}
}
else if (start.X == end.X) // if both start and end X are the same, it's a vertical slice.
{
int x = (int)start.X;
for (int y = (int)start.Y; yCnt > 0; y += yIncDec, yCnt--)
{
SpriteSheetKeyFrame frame = new SpriteSheetKeyFrame(new Vector2(x * cellSize.X, y * cellSize.Y), new TimeSpan(time.Ticks * frameCount++));
frames.Add(frame);
}
}
else // If neither start or end X or Y are the same, then it's a block of frames
{
for (int y = (int)start.Y; yCnt > 0; y += yIncDec, yCnt--)
{
float xcnt = xCnt;
for (int x = (int)start.X; xcnt > 0; x += xIncDec, xcnt--)
{
SpriteSheetKeyFrame frame = new SpriteSheetKeyFrame(new Vector2(x * cellSize.X, y * cellSize.Y), new TimeSpan(time.Ticks * frameCount++));
frames.Add(frame);
}
}
}
retVal.Keyframes = frames;
return(retVal);
}
