/// <summary>
/// 生成sprite animation 的mesh
///
/// </summary>
/// <param name="tex">sprite animation 纹理</param>
/// <param name="distVault"></param>
/// <param name="eulerVault"></param>
/// <param name="dilate"></param>
/// <param name="size"></param>
/// <param name="row">排</param>
/// <param name="col">列</param>
/// <param name="countDir">动画的方向几个</param>
/// <param name="depth"></param>
/// <param name="wing"></param>
/// <returns></returns>
public static Mesh Generate(Texture2D tex, int distVault, int eulerVault, int dilate, float size, int row, int col, int countDir = 16, int depth = 8, int wing = 8)
{
// 得到格子数据
float[,] alphas = GenerateAlphaTex(tex, row, col);
int width = alphas.GetLength(0);
int height = alphas.GetLength(1);
List <TexPoint> points = SampleTexture.Test(alphas, countDir, depth, wing);
SimplifySample.Simplify(points, distVault, eulerVault, dilate);
int maxX = width - 1;
int maxY = height - 1;
//int uvX = tex.width - 1;
//int uvY = tex.height - 1;
//int offsetY = height * (row - 1);
int count = points.Count;
List <Vector2> pts = new List <Vector2>(count);
List <Vector2> uvs = new List <Vector2>(count);
for (int i = 0; i < count; i++)
{
pts.Add(points[i].Pos);
uvs.Add(points[i].UV(maxX, maxY));
}
PolyPartSet set = MonotonePartition.DoPartition(pts);
set.Triangulate(pts);
float sizeY = size * height / width;
Vector3[] vertices = new Vector3[count];
Vector3[] normals = new Vector3[count];
for (int i = 0; i < count; i++)
{
vertices[i] = new Vector3((pts[i].x / maxX - 0.5f) * size, (pts[i].y / maxY - 0.5f) * size, 0);
normals[i] = Vector3.forward;
}
Mesh mesh = new Mesh();
mesh.triangles = null;
mesh.vertices = vertices;
mesh.normals = normals;
mesh.uv = uvs.ToArray();
mesh.triangles = set.tris.ToArray();
return(mesh);
}
public static PolyPartSet DoPartition(List <Vector2> pts)
{
PolyPartSet partSet = new PolyPartSet();
int countP = pts.Count;
List <int> ids = new List <int>(countP);
for (int i = 0; i < countP; i++)
{
ids.Add(i);
}
partSet.AddTestPoly(ids);
while (true)
{
List <int> testPoly = partSet.Next();
if (testPoly == null)
{
break;
}
else
{
PolyPart part = Partition(pts, testPoly);
if (part == null)
{
partSet.AddMonotone(testPoly);
}
else
{
partSet.AddTestPoly(part.partA);
partSet.AddTestPoly(part.partB);
}
}
}
return(partSet);
}
