private static List <Sprite> CreateSpritesForAtlas(Texture2D atlas, SpriteSheetData sheetData)
{
var sprites = new List <Sprite>(sheetData.frames.Length);
foreach (SpriteSheetData.Frame frame in sheetData.frames)
{
Vector2 pivot = new Vector2(
(frame.sourceSize.w * 0.5f - frame.spriteSourceSize.x) / frame.spriteSourceSize.w,
(frame.sourceSize.h * 0.5f - (frame.sourceSize.h - frame.spriteSourceSize.y - frame.spriteSourceSize.h)) / frame.spriteSourceSize.h
);
UnityEngine.Rect rect = frame.GetUnityTextureRect(sheetData.meta.size.h);
Sprite sprite = Sprite.Create(
atlas,
rect,
pivot,
16
);
sprite.name = frame.filename;
sprites.Add(sprite);
}
return(sprites);
}
private GeneratedClip[] CreateAnimationClips(Settings settings, AsepriteFileInfo aseInfo, List <Sprite> sprites)
{
SpriteSheetData sheetData = aseInfo.spriteSheetData;
var clipInfoLookup = new Dictionary <string, List <(Sprite sprite, int duration)> >();
foreach (SpriteSheetData.FrameTag frameTag in sheetData.meta.frameTags)
{
var framesInfo = new List <(Sprite sprite, int duration)>();
for (int i = frameTag.from; i <= frameTag.to; i++)
{
SpriteSheetData.Frame frame = sheetData.frames[i];
Sprite sprite = sprites.Find((s) => { return(frame.filename.Equals(s.name)); });
if (ReferenceEquals(sprite, null))
{
continue;
}
int duration = frame.duration;
framesInfo.Add((sprite, duration));
}
string clipName = $"aseprite_{aseInfo.title}_{frameTag.name}";
clipInfoLookup.Add(clipName, framesInfo);
}
var clips = new List <AnimationClip>(clipInfoLookup.Count);
foreach (var kvp in clipInfoLookup)
{
string clipName = kvp.Key;
List <(Sprite sprite, int duration)> clipInfo = kvp.Value;
AnimationClip clip = new AnimationClip();
clip.wrapMode = WrapMode.Loop;
clip.name = clipName;
int[] frameTimesInMilliseconds = new int[clipInfo.Count];
for (int iFrame = 0; iFrame < frameTimesInMilliseconds.Length; iFrame++)
{
frameTimesInMilliseconds[iFrame] = clipInfo[iFrame].duration;
}
clip.frameRate = ClipSettings.CalculateAutoFrameRate(settings.MaxSampleRate, frameTimesInMilliseconds);
AnimationClipSettings currentClipSettings = AnimationUtility.GetAnimationClipSettings(clip);
currentClipSettings.loopTime = true;
AnimationUtility.SetAnimationClipSettings(clip, currentClipSettings);
var spriteBinding = new EditorCurveBinding();
spriteBinding.type = typeof(SpriteRenderer);
spriteBinding.path = clipSettings.spriteRendererPath;
spriteBinding.propertyName = "m_Sprite";
int clipLength = clipInfo.Count;
var keyframes = new List <ObjectReferenceKeyframe>(clipLength + 1);
float currentDuration = 0f;
for (int i = 0; i < clipLength; i++)
{
var keyframe = new ObjectReferenceKeyframe();
keyframe.value = clipInfo[i].sprite;
keyframe.time = currentDuration;
keyframes.Add(keyframe);
// Divide frame duration by 1000 because it is specified by Aseprite in milliseconds.
float keyDuration = clipInfo[i].duration / 1000f;
currentDuration += keyDuration;
// TODO: Miscreant: Do these calculations before any sec/msec conversions for more precision
// Tack on a duplicate of the last keyframe to ensure the last frame gets its full duration
if (i == clipLength - 1 && keyDuration > (1.0f / clip.frameRate))
{
keyframe = new ObjectReferenceKeyframe();
// The last frame will persist for one full sample, so subtract that from the current time
keyframe.time = currentDuration - (1.0f / clip.frameRate);
keyframe.value = clipInfo[i].sprite;
keyframes.Add(keyframe);
}
}
AnimationUtility.SetObjectReferenceCurve(
clip,
spriteBinding,
keyframes.ToArray()
);
clips.Add(clip);
}
return(FinalizeAnimationClips(aseInfo, clips));
}
