private static Texture2D CreateBlankSpritesheet(
AsepriteImporterSettings settings,
Vector2Int frameSize,
int frameCount,
out int cols)
{
cols = frameCount;
int rows = 1;
var sheetSize = new Vector2Int(cols * frameSize.x, rows * frameSize.y);
while (cols > 1 && sheetSize.x / 2f > sheetSize.y)
{
cols = Mathf.CeilToInt(cols / 2f);
rows *= 2;
sheetSize = new Vector2Int(cols * frameSize.x, rows * frameSize.y);
}
var powerTwo = NextPowerTwo(Math.Max(sheetSize.x, sheetSize.y));
var spritesheet = new Texture2D(
powerTwo,
powerTwo,
TextureFormat.RGBA32,
false);
spritesheet.Clear(Color.clear);
spritesheet.filterMode = settings.FilterMode;
spritesheet.alphaIsTransparency = false;
spritesheet.wrapMode = settings.WrapMode;
spritesheet.anisoLevel = settings.AnisoLevel;
spritesheet.name = "Texture";
return(spritesheet);
}
private static Sprite CreateNamedSprite(
string name,
Texture2D texture,
UnityEditor.AssetImporters.SpriteImportData importData,
AsepriteImporterSettings settings)
{
var sprite = Sprite.Create(
texture,
importData.rect,
importData.pivot,
settings.PixelsPerUnit,
settings.ExtrudeEdges,
settings.MeshType,
importData.border,
settings.GeneratePhysicsShape);
sprite.name = name;
return(sprite);
}
public AsepriteAssets CreateAssets(AsepriteImporterSettings settings, string name)
{
var padding = settings.InnerPadding;
var paddedFrameSize = new Vector2Int(
_frameSize.x + padding * 2,
_frameSize.y + padding * 2);
var spritesheet = CreateBlankSpritesheet(
settings,
paddedFrameSize,
_frames.Count,
out int cols);
var sprites = new List <Sprite>();
for (var i = 0; i < _frames.Count; ++i)
{
var frame = _frames[i];
var col = i % cols;
var row = Mathf.FloorToInt(i / (float)cols) + 1;
var spriteRect = new Rect(
col * paddedFrameSize.x,
spritesheet.height - (row * paddedFrameSize.y),
paddedFrameSize.x,
paddedFrameSize.y);
var framePixels = frame.GetFramePixels(_frameSize);
spritesheet.SetPixels(
(int)spriteRect.x + padding,
(int)spriteRect.y + padding,
_frameSize.x,
_frameSize.y,
framePixels);
var spriteData = new UnityEditor.AssetImporters.SpriteImportData
{
rect = spriteRect,
pivot = settings.PivotValue
+ new Vector2(
padding / (float)paddedFrameSize.x,
padding / (float)paddedFrameSize.y),
name = i.ToString()
};
var sprite = CreateNamedSprite(
string.Format("{0}_{1}", name, spriteData.name),
spritesheet,
spriteData,
settings);
sprites.Add(sprite);
}
spritesheet.Apply();
var animations = CreateAnimations(name, sprites, typeof(SpriteRenderer), settings.AnimationLoop);
var uiAnimName = $"UI_{name}";
var uiAnimations = CreateAnimations(uiAnimName, sprites, typeof(Image), settings.AnimationLoop);
return(new AsepriteAssets(
spritesheet,
sprites,
animations.Concat(uiAnimations)));
}
