void Update()
{
if (!_isInit)
{
if (_clothSim == null)
{
_clothSim = GetComponent <GPUClothSimulation>();
}
if (_clothSim != null && _clothSim.IsInit)
{
var gridList = new List <SpringIds>();
var gridDiagonalList = new List <SpringIds>();
var gridDiagonalAlternateList = new List <SpringIds>();
var res = _clothSim.GetClothResolution();
for (var y = 0; y < res.y; y++)
{
for (var x = 0; x < res.x; x++)
{
gridList.Add(new SpringIds(new Vector2Int(x, y), new Vector2Int(x, y + 1)));
gridList.Add(new SpringIds(new Vector2Int(x, y), new Vector2Int(x + 1, y)));
if (x < res.x - 1 && y < res.y - 1)
{
gridDiagonalList.Add(new SpringIds(new Vector2Int(x, y), new Vector2Int(x + 1, y + 1)));
gridDiagonalList.Add(new SpringIds(new Vector2Int(x + 1, y), new Vector2Int(x, y + 1)));
}
if (x < res.x - 2 && y < res.y - 2)
{
gridDiagonalAlternateList.Add(new SpringIds(new Vector2Int(x, y), new Vector2Int(x + 2, y + 2)));
}
if (x >= 2 && y < res.y - 2)
{
gridDiagonalAlternateList.Add(new SpringIds(new Vector2Int(x, y), new Vector2Int(x - 2, y + 2)));
}
}
}
_gridBuffer = new ComputeBuffer(gridList.Count, Marshal.SizeOf(typeof(SpringIds)));
_gridBuffer.SetData(gridList.ToArray());
_gridDiagonalBuffer = new ComputeBuffer(gridDiagonalList.Count, Marshal.SizeOf(typeof(SpringIds)));
_gridDiagonalBuffer.SetData(gridDiagonalList.ToArray());
_gridDiagonalAlternateBuffer = new ComputeBuffer(gridDiagonalAlternateList.Count, Marshal.SizeOf(typeof(SpringIds)));
_gridDiagonalAlternateBuffer.SetData(gridDiagonalAlternateList.ToArray());
gridList = null;
gridDiagonalList = null;
gridDiagonalAlternateList = null;
_isInit = true;
}
}
}
// メッシュを生成
void GenerateMesh()
{
// メッシュの解像度を計算
Vector2Int clothResolution = _clothSim.GetClothResolution();
int gridWidth = clothResolution.x - 1;
int gridHeight = clothResolution.y - 1;
// MeshRendererを取得, または作成
if (!GetComponent <MeshRenderer>())
{
_meshRenderer = gameObject.AddComponent <MeshRenderer>();
}
else
{
_meshRenderer = GetComponent <MeshRenderer>();
}
_meshRenderer.shadowCastingMode = UnityEngine.Rendering.ShadowCastingMode.Off;
_meshRenderer.receiveShadows = false;
// MeshFilterを作成
MeshFilter meshFilter;
if (!GetComponent <MeshFilter>())
{
meshFilter = gameObject.AddComponent <MeshFilter>();
}
else
{
meshFilter = GetComponent <MeshFilter>();
}
// Meshを作成
var mesh = new Mesh();
meshFilter.mesh = mesh;
// グリッドの間隔
var tileSizeX = 1.0f / gridWidth;
var tileSizeY = 1.0f / gridHeight;
// 頂点データを作成
var vertices = new List <Vector3>(); // 頂点
var triangles = new List <int>(); // 頂点インデックス
var normals = new List <Vector3>(); // 法線
var uvs = new List <Vector2>(); // UV
var index = 0;
for (var y = 0; y < gridHeight; y++)
{
for (var x = 0; x < gridWidth; x++)
{
// 頂点を追加
vertices.Add(new Vector3(x * tileSizeX, y * tileSizeY, 0));
vertices.Add(new Vector3((x + 1) * tileSizeX, y * tileSizeY, 0));
vertices.Add(new Vector3((x + 1) * tileSizeX, (y + 1) * tileSizeY, 0));
vertices.Add(new Vector3(x * tileSizeX, (y + 1) * tileSizeY, 0));
// 頂点インデックスを追加
triangles.Add(index + 2);
triangles.Add(index + 1);
triangles.Add(index);
triangles.Add(index);
triangles.Add(index + 3);
triangles.Add(index + 2);
index += 4;
// 法線を追加
normals.Add(Vector3.forward);
normals.Add(Vector3.forward);
normals.Add(Vector3.forward);
normals.Add(Vector3.forward);
// UVを追加
uvs.Add(new Vector2((x + 0) * tileSizeX, (y + 0) * tileSizeY));
uvs.Add(new Vector2((x + 1) * tileSizeX, (y + 0) * tileSizeY));
uvs.Add(new Vector2((x + 1) * tileSizeX, (y + 1) * tileSizeY));
uvs.Add(new Vector2((x + 0) * tileSizeX, (y + 1) * tileSizeY));
}
}
// 頂点の最大数（通常は65535個に制限されている）を上げる
mesh.indexFormat = UnityEngine.Rendering.IndexFormat.UInt32;
// 頂点データを代入
mesh.vertices = vertices.ToArray();
mesh.normals = normals.ToArray();
mesh.triangles = triangles.ToArray();
mesh.uv = uvs.ToArray();
mesh.bounds = new Bounds(transform.position, Vector3.one * 1000.0f);
mesh.RecalculateNormals();
mesh.RecalculateTangents();
mesh.MarkDynamic();
mesh.name = "Grid_" + gridWidth.ToString() + "_" + gridHeight.ToString();
}
