public static Score GetScore(PackTexture lhs, PackTexture rhs)
{
int match = lhs.MultipleTextures.Intersect(rhs.MultipleTextures).Count();
return(new Score()
{
Lhs = lhs,
Rhs = rhs,
Match = match
});
}
private TextureAtlas MakeTextureAtlas(PackTexture packTexture, int packTextureSize)
{
TextureAtlas atlas = ScriptableObject.CreateInstance <TextureAtlas>();
Texture2D textureAtlas = new Texture2D(packTextureSize, packTextureSize, TextureFormat.RGBA32, false);
int itemCount = (int)Math.Sqrt(packTexture.PackableTextureCount);
int itemSize = packTextureSize / itemCount;
int index = 0;
atlas.uvs = new Rect[packTexture.Textures.Count];
atlas.textures = packTexture.Textures.ToArray();
foreach (var texture in atlas.textures)
{
int width, height;
Color[] buffer = GetTextureColors(texture, itemSize, out width, out height);
int col = index % itemCount;
int row = index / itemCount;
int x = col * itemSize;
int y = row * itemSize;
textureAtlas.SetPixels(x, y, width, height, buffer);
atlas.uvs[index] = new Rect(
(float)x / (float)packTextureSize,
(float)y / (float)packTextureSize,
(float)width / (float)packTextureSize,
(float)height / (float)packTextureSize);
index += 1;
}
textureAtlas.Apply();
var name = Path.GetRandomFileName();
textureAtlas = SaveTexture(textureAtlas, name);
atlas.textureAtlas = textureAtlas;
return(atlas);
}
private TextureAtlas MakeTextureAtlas(PackTexture packTexture, int packTextureSize)
{
TextureAtlas atlas = new TextureAtlas();
//Texture2D packedTexture = new Texture2D(packTextureSize, packTextureSize, TextureFormat.RGBA32, false);
int itemCount = (int)Math.Sqrt(packTexture.PackableTextureCount);
int itemSize = packTextureSize / itemCount;
int packedTextureCount = 0;
int index = 0;
foreach (var multipleTexture in packTexture.MultipleTextures)
{
packedTextureCount = Math.Max(packedTextureCount, multipleTexture.textureList.Count);
}
Texture2D[] packedTexture = new Texture2D[packedTextureCount];
for (int i = 0; i < packedTextureCount; ++i)
{
packedTexture[i] = new Texture2D(packTextureSize, packTextureSize, TextureFormat.RGBA32, false);
}
atlas.UVs = new Rect[packTexture.MultipleTextures.Count];
atlas.MultipleTextures = packTexture.MultipleTextures.ToArray();
foreach (var texture in atlas.MultipleTextures)
{
int width = 0, height = 0;
Color[] buffer = GetTextureColors(texture.textureList[0], itemSize, out width, out height);
int col = index % itemCount;
int row = index / itemCount;
int x = col * itemSize;
int y = row * itemSize;
packedTexture[0].SetPixels(x, y, width, height, buffer);
atlas.UVs[index] = new Rect(
(float)x / (float)packTextureSize,
(float)y / (float)packTextureSize,
(float)width / (float)packTextureSize,
(float)height / (float)packTextureSize);
index += 1;
for (int i = 1; i < texture.textureList.Count; ++i)
{
int extWidth = 0, extHeight = 0;
Color[] extBuffer = GetTextureColors(texture.textureList[i], itemSize, out extWidth, out extHeight);
if (extWidth != width || extHeight != height)
{
Debug.Log("Resize texture: " + width + "_" + extWidth + ", " + height + "_" + extHeight);
extBuffer = ResizeImage(extBuffer, extWidth, extHeight, width, height);
}
packedTexture[i].SetPixels(x, y, width, height, extBuffer);
}
}
for (int i = 0; i < packedTexture.Length; ++i)
{
packedTexture[i].Apply();
}
atlas.PackedTexture = packedTexture;
return(atlas);
}
public void Pack(int packTextureSize, int maxPieceSize)
{
//First, we should separate each group by count.
Dictionary <int, List <Group> > groupCluster = new Dictionary <int, List <Group> >();
for (int i = 0; i < groups.Count; ++i)
{
Group group = groups[i];
int maximum = GetMaximumTextureCount(packTextureSize, maxPieceSize, group.multipleTextures.Count);
if (groupCluster.ContainsKey(maximum) == false)
{
groupCluster[maximum] = new List <Group>();
}
groupCluster[maximum].Add(group);
}
//Second, we should figure out which group should be combined from each cluster.
foreach (var cluster in groupCluster)
{
int maximum = cluster.Key;
List <PackTexture> packTextures = new List <PackTexture>();
foreach (var group in cluster.Value)
{
packTextures.Add(new PackTexture()
{
Objects = new List <object>()
{
group.obj
},
MultipleTextures = new HashSet <MultipleTexture>(group.multipleTextures, new MultipleTextureComparer()),
PackableTextureCount = maximum
});
}
List <Score> scoreList = new List <Score>();
for (int i = 0; i < packTextures.Count; ++i)
{
for (int j = i + 1; j < packTextures.Count; ++j)
{
scoreList.Add(Score.GetScore(packTextures[i], packTextures[j]));
}
}
scoreList.Sort((lhs, rhs) => rhs.Match - lhs.Match);
for (int i = 0; i < scoreList.Count; ++i)
{
HashSet <MultipleTexture> unionMultipleTextures = new HashSet <MultipleTexture>(scoreList[i].Lhs.MultipleTextures.Union(scoreList[i].Rhs.MultipleTextures), new MultipleTextureComparer());
if (unionMultipleTextures.Count <= maximum)
{
PackTexture lhs = scoreList[i].Lhs;
PackTexture rhs = scoreList[i].Rhs;
List <object> newObjects = new List <object>(scoreList[i].Lhs.Objects.Concat(scoreList[i].Rhs.Objects));
PackTexture newPackTexture = new PackTexture()
{
Objects = newObjects,
MultipleTextures = unionMultipleTextures,
PackableTextureCount = maximum
};
packTextures.Remove(lhs);
packTextures.Remove(rhs);
packTextures.Add(newPackTexture);
//Remove merged Score and make Score by new Pack Texture.
scoreList.RemoveAll(score => score.Lhs == lhs || score.Lhs == rhs ||
score.Rhs == lhs || score.Rhs == rhs);
for (int j = 0; j < packTextures.Count - 1; ++j)
{
scoreList.Add(Score.GetScore(packTextures[j], newPackTexture));
}
scoreList.Sort((l, r) => r.Match - l.Match);
//for start first loop
i = -1;
}
}
foreach (var pack in packTextures)
{
var atlas = MakeTextureAtlas(pack, packTextureSize);
atlasGroups.Add(new AtlasGroup()
{
Objects = pack.Objects,
Atlas = atlas
});
}
Debug.Log("Packing count : " + maximum + ", textures : " + packTextures.Count);
}
}
