public void AddTurbulence(Vector3 pos, float radius, float scale)
{
if (!gameObject.activeSelf)
{
return;
}
float posx = pos.x - basePos.x;
float posz = pos.z - basePos.z;
float x1 = posx - radius;
float x2 = posx + radius;
float z1 = posz - radius;
float z2 = posz + radius;
// out of bounds
if (x1 > TerrainUtils.TERRAIN_TILE_SIZE || x2 < 0f || z1 > TerrainUtils.TERRAIN_TILE_SIZE || z2 < 0f)
{
return;
}
int cx1 = TerrainUtils.PosToGrid(x1, TerrainUtils.GRASS_TILE_CELL_SIZE, TerrainUtils.GRASS_TILE_CELL_DIM);
int cx2 = TerrainUtils.PosToGrid(x2, TerrainUtils.GRASS_TILE_CELL_SIZE, TerrainUtils.GRASS_TILE_CELL_DIM);
int cz1 = TerrainUtils.PosToGrid(z1, TerrainUtils.GRASS_TILE_CELL_SIZE, TerrainUtils.GRASS_TILE_CELL_DIM);
int cz2 = TerrainUtils.PosToGrid(z2, TerrainUtils.GRASS_TILE_CELL_SIZE, TerrainUtils.GRASS_TILE_CELL_DIM);
if (scale < 0)
{
scale = 0;
}
if (scale > 1f)
{
radius *= scale;
}
for (int i = cz1; i <= cz2; i++)
{
for (int j = cx1; j <= cx2; j++)
{
GrassTileCell cell = cellMap[j, i];
if (cell != null)
{
float cx = TerrainUtils.GridToPos(j, TerrainUtils.GRASS_TILE_CELL_SIZE) + TerrainUtils.GRASS_TILE_CELL_HALF_SIZE;
float cz = TerrainUtils.GridToPos(i, TerrainUtils.GRASS_TILE_CELL_SIZE) + TerrainUtils.GRASS_TILE_CELL_HALF_SIZE;
float dis = Mathf.Sqrt((cx - posx) * (cx - posx) + (cz - posz) * (cz - posz));
if (dis > radius)
{
continue;
}
float f = (1f - dis / radius) * 8f + 1f;
f *= scale;
if (cell.turbulenceScale < f)
{
cell.turbulenceScale = f;
float ff = Mathf.Acos((cx - posx) / dis);
if (cz < posz)
{
ff = 2 * Mathf.PI - ff;
}
cell.waveSpeed = 256 * ff / (2 * Mathf.PI);
if (cell.turbulenceScaleFactor < 0.1f)
{
cell.turbulenceScaleFactor = 0.1f;
}
cell.isTurbulence = true;
isDirty = true;
}
}
}
}
}
private void BuildGrassTile(GrassTileData d)
{
if (d == null || d.textureIndeics == null)
{
return;
}
int grassCount = 0;
int grassCounter = 0;
int grassSkip = 2;
for (int i = 0; i < d.textureIndeics.Length; i++)
{
for (int l = 0; l < TerrainUtils.GRASS_TILE_CELL_DIM; l++)
{
for (int m = 0; m < TerrainUtils.GRASS_TILE_CELL_DIM; m++)
{
int idx = l * TerrainUtils.GRASS_TILE_CELL_DIM + m;
int texPos = d.texture[idx];
if (texPos != i || d.size[idx] <= 0)
{
continue;
}
if (grassCounter++ % grassSkip != 0)
{
continue;
}
grassCount++;
}
}
}
if (grassCount <= 0)
{
return;
}
grassCounter = 0;
Random.seed = d.seed;
Vector3 tilePos = new Vector3();
tilePos.x = (float)d.posX * TerrainUtils.TERRAIN_TILE_SIZE;
tilePos.z = (float)d.posZ * TerrainUtils.TERRAIN_TILE_SIZE;
tilePos.y = TerrainUtils.GetTerrainHeight(tilePos.x + TerrainUtils.TERRAIN_TILE_HALF_SIZE, tilePos.z + TerrainUtils.TERRAIN_TILE_HALF_SIZE);
List <GrassTileCell> cellList = new List <GrassTileCell>();
GrassTileCell[,] cellMap = new GrassTileCell[TerrainUtils.GRASS_TILE_CELL_DIM, TerrainUtils.GRASS_TILE_CELL_DIM];
Vector3[] vertices = new Vector3[grassCount * 4];
Color32[] colors = new Color32[grassCount * 4];
Vector2[] uvs = new Vector2[grassCount * 4];
Vector2[] uv3 = new Vector2[grassCount * 4];
Vector3[] normals = new Vector3[grassCount * 4];
List <int> triangles = new List <int>();
int vertIndex = 0;
for (int i = 0; i < d.textureIndeics.Length; i++)
{
int texIndex = d.textureIndeics[i];
Texture2D tex = null;
Rect rect = default(Rect);
float aspect = 1f;
GetTexture(texIndex, ref tex, ref rect, ref aspect);
for (int l = 0; l < TerrainUtils.GRASS_TILE_CELL_DIM; l++)
{
for (int m = 0; m < TerrainUtils.GRASS_TILE_CELL_DIM; m++)
{
int idx = l * TerrainUtils.GRASS_TILE_CELL_DIM + m;
int texPos = d.texture[idx];
int size = d.size[idx];
if (texPos != i || d.size[idx] <= 0)
{
continue;
}
if (grassCounter++ % grassSkip != 0)
{
continue;
}
float gx = (float)m * TerrainUtils.GRASS_TILE_CELL_SIZE + Random.Range(0f, 0.26f);
float gz = (float)l * TerrainUtils.GRASS_TILE_CELL_SIZE + Random.Range(0f, 0.26f);
float gy = TerrainUtils.GetTerrainHeight(gx + tilePos.x, gz + tilePos.z) - tilePos.y;
int rotation = Random.Range(0, 63);
int waveSpeed = Random.Range(0, 255);
float sx = gx;
float sz = gz;
float r = Mathf.Deg2Rad * ((float)rotation / 64f * -60f + -30f);
float s = (float)size;
float hw = aspect / 2f;
float hwsinr = hw * Mathf.Sin(r);
float hwcosr = hw * Mathf.Cos(r);
vertices[vertIndex + 0].x = -hwcosr * s + sx;
vertices[vertIndex + 0].y = 1 * s + gy;
vertices[vertIndex + 0].z = -hwsinr * s + sz;
vertices[vertIndex + 1].x = hwcosr * s + sx;
vertices[vertIndex + 1].y = 1 * s + gy;
vertices[vertIndex + 1].z = hwsinr * s + sz;
vertices[vertIndex + 2].x = -hwcosr * s + sx;
vertices[vertIndex + 2].y = 0 * s + gy;
vertices[vertIndex + 2].z = -hwsinr * s + sz;
vertices[vertIndex + 3].x = hwcosr * s + sx;
vertices[vertIndex + 3].y = 0 * s + gy;
vertices[vertIndex + 3].z = hwsinr * s + sz;
r = Mathf.Deg2Rad * (Random.Range(0, 360f) * -60f + -30f);
sx = gx + Random.Range(-1f, 1f) * hw * s;
sz = gz + Random.Range(-1f, 1f) * hw * s;
uvs[vertIndex + 0].x = rect.xMin;
uvs[vertIndex + 0].y = rect.yMax - 0.01f;
uvs[vertIndex + 1].x = rect.xMax;
uvs[vertIndex + 1].y = rect.yMax - 0.01f;
uvs[vertIndex + 2].x = rect.xMin;
uvs[vertIndex + 2].y = rect.yMin;
uvs[vertIndex + 3].x = rect.xMax;
uvs[vertIndex + 3].y = rect.yMin;
colors[vertIndex + 0] = useColors[texIndex];
colors[vertIndex + 1] = useColors[texIndex];
colors[vertIndex + 2] = useColors[texIndex];
colors[vertIndex + 3] = useColors[texIndex];
uv3[vertIndex + 0].x = 1;
uv3[vertIndex + 0].y = waveSpeed;
uv3[vertIndex + 1].x = 1;
uv3[vertIndex + 1].y = waveSpeed;
uv3[vertIndex + 2].x = 0f;
uv3[vertIndex + 2].y = 0f;
uv3[vertIndex + 3].x = 0f;
uv3[vertIndex + 3].y = 0f;
normals[vertIndex + 0].x = 0f;
normals[vertIndex + 0].y = 1f;
normals[vertIndex + 0].z = 0f;
normals[vertIndex + 1].x = 0f;
normals[vertIndex + 1].y = 1f;
normals[vertIndex + 1].z = 0f;
normals[vertIndex + 2].x = 0f;
normals[vertIndex + 2].y = 1f;
normals[vertIndex + 2].z = 0f;
normals[vertIndex + 3].x = 0f;
normals[vertIndex + 3].y = 1f;
normals[vertIndex + 3].z = 0f;
triangles.Add(vertIndex + 0);
triangles.Add(vertIndex + 1);
triangles.Add(vertIndex + 2);
triangles.Add(vertIndex + 1);
triangles.Add(vertIndex + 3);
triangles.Add(vertIndex + 2);
GrassTileCell cell = new GrassTileCell();
cell.vertStart = vertIndex;
cell.waveSpeed = (float)waveSpeed;
cell.waveSpeedStart = waveSpeed;
cell.waveSpeedStep = 1 + Random.Range(0.0f, 1.0f);
cell.turbulenceScale = 1;
cell.turbulenceScaleFactor = 0.1f;
cell.isTurbulence = true;
cellList.Add(cell);
cellMap[m, l] = cell;
vertIndex += 4;
}
}
}
// create grass tile
string tileName = string.Format("GrassTile({0},{1})", d.posX, d.posZ);
GameObject gameObject = new GameObject(tileName);
gameObject.transform.parent = transform;
gameObject.transform.localPosition = Vector3.zero;
gameObject.transform.localRotation = Quaternion.identity;
gameObject.transform.localScale = Vector3.one;
gameObject.hideFlags = HideFlags.DontSaveInEditor;
gameObject.layer = LayerMask.NameToLayer("Terrain");
gameObject.transform.localPosition = tilePos;
Mesh mesh = new Mesh();
mesh.vertices = vertices;
mesh.uv = uvs;
mesh.colors32 = colors;
mesh.normals = normals;
mesh.uv3 = uv3;
mesh.triangles = triangles.ToArray();
MeshFilter meshFilter = gameObject.GetComponent <MeshFilter>();
if (meshFilter == null)
{
meshFilter = gameObject.AddComponent <MeshFilter>();
}
meshFilter.sharedMesh = mesh;
MeshRenderer meshRenderer = gameObject.GetComponent <MeshRenderer>();
if (meshRenderer == null)
{
meshRenderer = gameObject.AddComponent <MeshRenderer>();
}
meshRenderer.sharedMaterial = packedMaterial;
meshRenderer.shadowCastingMode = UnityEngine.Rendering.ShadowCastingMode.Off;
mesh.MarkDynamic();
GrassTile tile = gameObject.GetComponent <GrassTile>();
if (tile == null)
{
tile = gameObject.AddComponent <GrassTile>();
}
tile.basePos = tilePos;
tile.cellList = cellList;
tile.cellMap = cellMap;
tile.meshRenderer = meshRenderer;
tile.meshFilter = meshFilter;
tile.uv3 = uv3;
tile.Init();
tileList.Add(tile);
}