public static RuntimeSpriteMesh CreateSpriteMesh(Sprite sprite, Vector2 pivot)
{
if (spriteMeshes.ContainsKey(sprite))
{
return(spriteMeshes[sprite]);
}
else
{
RuntimeSpriteMesh spriteMesh = ScriptableObject.CreateInstance <RuntimeSpriteMesh>();
InitFromSprite(spriteMesh, sprite);
SpriteMeshData spriteMeshData = ScriptableObject.CreateInstance <SpriteMeshData>();
spriteMeshData.name = spriteMesh.name + "_Data";
spriteMeshData.hideFlags = HideFlags.HideInHierarchy;
InitFromSprite(spriteMeshData, sprite, pivot);
spriteMesh.spriteMeshData = spriteMeshData;
UpdateAssets(spriteMesh, spriteMeshData);
return(spriteMesh);
}
}
static void InitFromSprite(RuntimeSpriteMesh spriteMesh, Sprite sprite)
{
spriteMesh.SetSprite(sprite);
spriteMesh.SetApiVersion(RuntimeSpriteMesh.api_version);
}
public static void UpdateAssets(RuntimeSpriteMesh spriteMesh, SpriteMeshData spriteMeshData)
{
if (spriteMesh && spriteMeshData)
{
//string spriteMeshPath = AssetDatabase.GetAssetPath(spriteMesh);
//SerializedObject spriteMeshSO = new SerializedObject(spriteMesh);
//SerializedProperty sharedMeshProp = spriteMeshSO.FindProperty("m_SharedMesh");
//SerializedProperty sharedMaterialsProp = spriteMeshSO.FindProperty("m_SharedMaterials");
if (!spriteMesh.sharedMesh)
{
Mesh mesh = new Mesh();
mesh.hideFlags = HideFlags.HideInHierarchy;
//AssetDatabase.AddObjectToAsset(mesh, spriteMeshPath);
//spriteMeshSO.Update();
//sharedMeshProp.objectReferenceValue = mesh;
//spriteMeshSO.ApplyModifiedProperties();
//EditorUtility.SetDirty(mesh);
}
spriteMesh.sharedMesh.name = spriteMesh.name;
if (spriteMesh.sharedMaterials.Length == 0)
{
//Material material = new Material(Shader.Find("Sprites/Default"));
//material.mainTexture = SpriteUtility.GetSpriteTexture(spriteMesh.sprite, false);
//AssetDatabase.AddObjectToAsset(material, spriteMeshPath);
//spriteMeshSO.Update();
//sharedMaterialsProp.arraySize = 1;
//sharedMaterialsProp.GetArrayElementAtIndex(0).objectReferenceValue = material;
//spriteMeshSO.ApplyModifiedProperties();
}
for (int i = 0; i < spriteMesh.sharedMaterials.Length; i++)
{
Material material = spriteMesh.sharedMaterials[i];
if (material)
{
if (spriteMesh.sprite)
{
//material.mainTexture = SpriteUtility.GetSpriteTexture(spriteMesh.sprite, false);
}
material.name = spriteMesh.name + "_" + i;
material.hideFlags = HideFlags.HideInHierarchy;
//EditorUtility.SetDirty(material);
}
}
spriteMeshData.hideFlags = HideFlags.HideInHierarchy;
//EditorUtility.SetDirty(spriteMeshData);
int width = 0;
int height = 0;
GetSpriteTextureSize(spriteMesh.sprite, ref width, ref height);
Vector3[] vertices = GetMeshVertices(spriteMesh.sprite, spriteMeshData);
Vector2 textureWidthHeightInv = new Vector2(1f / width, 1f / height);
Vector2[] uvs = (new List <Vector2>(spriteMeshData.vertices)).ConvertAll(v => Vector2.Scale(v, textureWidthHeightInv)).ToArray();
Vector3[] normals = (new List <Vector3>(vertices)).ConvertAll(v => Vector3.back).ToArray();
BoneWeight[] boneWeightsData = spriteMeshData.boneWeights;
if (boneWeightsData.Length != spriteMeshData.vertices.Length)
{
boneWeightsData = new BoneWeight[spriteMeshData.vertices.Length];
}
List <UnityEngine.BoneWeight> boneWeights = new List <UnityEngine.BoneWeight>(boneWeightsData.Length);
List <float> verticesOrder = new List <float>(spriteMeshData.vertices.Length);
for (int i = 0; i < boneWeightsData.Length; i++)
{
BoneWeight boneWeight = boneWeightsData[i];
List <KeyValuePair <int, float> > pairs = new List <KeyValuePair <int, float> >();
pairs.Add(new KeyValuePair <int, float>(boneWeight.boneIndex0, boneWeight.weight0));
pairs.Add(new KeyValuePair <int, float>(boneWeight.boneIndex1, boneWeight.weight1));
pairs.Add(new KeyValuePair <int, float>(boneWeight.boneIndex2, boneWeight.weight2));
pairs.Add(new KeyValuePair <int, float>(boneWeight.boneIndex3, boneWeight.weight3));
pairs = pairs.OrderByDescending(s => s.Value).ToList();
UnityEngine.BoneWeight boneWeight2 = new UnityEngine.BoneWeight();
boneWeight2.boneIndex0 = Mathf.Max(0, pairs[0].Key);
boneWeight2.boneIndex1 = Mathf.Max(0, pairs[1].Key);
boneWeight2.boneIndex2 = Mathf.Max(0, pairs[2].Key);
boneWeight2.boneIndex3 = Mathf.Max(0, pairs[3].Key);
boneWeight2.weight0 = pairs[0].Value;
boneWeight2.weight1 = pairs[1].Value;
boneWeight2.weight2 = pairs[2].Value;
boneWeight2.weight3 = pairs[3].Value;
boneWeights.Add(boneWeight2);
float vertexOrder = i;
if (spriteMeshData.bindPoses.Length > 0)
{
vertexOrder = spriteMeshData.bindPoses[boneWeight2.boneIndex0].zOrder * boneWeight2.weight0 +
spriteMeshData.bindPoses[boneWeight2.boneIndex1].zOrder * boneWeight2.weight1 +
spriteMeshData.bindPoses[boneWeight2.boneIndex2].zOrder * boneWeight2.weight2 +
spriteMeshData.bindPoses[boneWeight2.boneIndex3].zOrder * boneWeight2.weight3;
}
verticesOrder.Add(vertexOrder);
}
List <WeightedTriangle> weightedTriangles = new List <WeightedTriangle>(spriteMeshData.indices.Length / 3);
for (int i = 0; i < spriteMeshData.indices.Length; i += 3)
{
int p1 = spriteMeshData.indices[i];
int p2 = spriteMeshData.indices[i + 1];
int p3 = spriteMeshData.indices[i + 2];
weightedTriangles.Add(new WeightedTriangle(p1, p2, p3,
verticesOrder[p1],
verticesOrder[p2],
verticesOrder[p3]));
}
weightedTriangles = weightedTriangles.OrderBy(t => t.weight).ToList();
List <int> indices = new List <int>(spriteMeshData.indices.Length);
for (int i = 0; i < weightedTriangles.Count; ++i)
{
WeightedTriangle t = weightedTriangles[i];
indices.Add(t.p1);
indices.Add(t.p2);
indices.Add(t.p3);
}
List <Matrix4x4> bindposes = (new List <BindInfo>(spriteMeshData.bindPoses)).ConvertAll(p => p.bindPose);
for (int i = 0; i < bindposes.Count; i++)
{
Matrix4x4 bindpose = bindposes[i];
bindpose.m23 = 0f;
bindposes[i] = bindpose;
}
spriteMesh.sharedMesh.Clear();
spriteMesh.sharedMesh.vertices = vertices;
spriteMesh.sharedMesh.uv = uvs;
spriteMesh.sharedMesh.triangles = indices.ToArray();
spriteMesh.sharedMesh.normals = normals;
spriteMesh.sharedMesh.boneWeights = boneWeights.ToArray();
spriteMesh.sharedMesh.bindposes = bindposes.ToArray();
spriteMesh.sharedMesh.RecalculateBounds();
//RebuildBlendShapes(spriteMesh);
}
}
