private void Generate(GrassInstancePrototypes grassInstancePrototypes, List <GrassCell> grassCells)
{
MeshRenderer component = this.grassPrefabDataList[0].grassPrefab.GetComponent <MeshRenderer>();
MeshBuilder builder = new MeshBuilder();
MeshBuffersCache cache = new MeshBuffersCache();
GrassColors componentInParent = base.GetComponentInParent <GrassColors>();
Dictionary <int, Material> dictionary = new Dictionary <int, Material>();
foreach (GrassCell cell in grassCells)
{
Material material;
if (!dictionary.TryGetValue(cell.lightmapId, out material))
{
material = new Material(component.sharedMaterial);
material.SetFloat("_GrassCullingRange", this.fadeRange);
material.SetFloat("_GrassCullingDistance", this.farCullingDistance);
if (cell.lightmapId >= 0)
{
material.SetTexture("_LightMap", LightmapSettings.lightmaps[cell.lightmapId].lightmapColor);
}
dictionary.Add(cell.lightmapId, material);
}
this.CombineGrass(builder, cache, grassInstancePrototypes, cell.grassPositions, componentInParent);
Mesh mesh = new Mesh();
builder.BuildToMesh(mesh, false);
GameObject obj2 = new GameObject("GrassCell")
{
layer = Layers.GRASS
};
obj2.AddComponent <MeshFilter>().sharedMesh = mesh;
MeshRenderer renderer2 = obj2.AddComponent <MeshRenderer>();
renderer2.material = material;
renderer2.receiveShadows = component.receiveShadows;
renderer2.shadowCastingMode = component.shadowCastingMode;
renderer2.lightProbeUsage = LightProbeUsage.Off;
obj2.transform.SetParent(base.gameObject.transform, true);
obj2.transform.position = cell.center;
obj2.isStatic = true;
}
}
public void Generate()
{
this.DeleteGrass();
if (this.grassCells.Count == 0)
{
LoggerProvider.GetLogger(this).Error($"GrassGenerator {base.name} : combined grass positions are not ready.");
}
else
{
for (int i = this.grassPrefabDataList.Count - 1; i >= 0; i--)
{
try
{
this.ValidateGrassPrefab(this.grassPrefabDataList[i]);
}
catch (Exception exception)
{
LoggerProvider.GetLogger(this).Error(exception.Message);
this.grassPrefabDataList.RemoveAt(i);
}
}
GrassInstancePrototypes grassInstancePrototypes = new GrassInstancePrototypes();
try
{
grassInstancePrototypes.CreatePrototypes(this.grassPrefabDataList);
this.Generate(grassInstancePrototypes, this.grassCells);
}
catch (Exception exception2)
{
LoggerProvider.GetLogger(this).Error("GrassGenerator " + base.name + ": grass generation failed", exception2);
this.DeleteGrass();
}
finally
{
grassInstancePrototypes.DestroyPrototypes();
}
}
}
private void CombineGrass(MeshBuilder builder, MeshBuffersCache cache, GrassInstancePrototypes grassInstancePrototypes, List <GrassPosition> combinedPositions, GrassColors colors)
{
builder.Clear();
Dictionary <int, float> dictionary = new Dictionary <int, float>();
int num = 0;
while (num < combinedPositions.Count)
{
GrassPrefabData data;
Mesh mesh;
grassInstancePrototypes.GetRandomPrototype(out mesh, out data);
int[] triangles = cache.GetTriangles(mesh);
Vector3[] vertices = cache.GetVertices(mesh);
Vector3[] normals = cache.GetNormals(mesh);
Vector2[] uVs = cache.GetUVs(mesh);
GrassPosition position = combinedPositions[num];
Matrix4x4 randomTransform = this.GetRandomTransform(data, position.position);
builder.ClearWeldHashing();
Color white = Color.white;
if (colors != null)
{
white = colors.GetRandomColor();
}
dictionary.Clear();
int index = 0;
while (true)
{
if (index >= triangles.Length)
{
num++;
break;
}
int num3 = triangles[index];
int num4 = triangles[index + 1];
int num5 = triangles[index + 2];
Vector3 v = vertices[num3];
Vector3 vector2 = vertices[num4];
Vector3 vector3 = vertices[num5];
Vector3 vector4 = normals[num3];
Vector3 vector5 = normals[num4];
Vector3 vector6 = normals[num5];
float num6 = 0f;
int key = (((int)(vector4.x * 10f)) ^ ((int)(vector4.y * 10f))) ^ ((int)(vector4.z * 10f));
if (!dictionary.TryGetValue(key, out num6))
{
num6 = Random.value;
dictionary.Add(key, num6);
}
if (num6 <= this.denstyMultipler)
{
v = randomTransform.MultiplyPoint(v);
vector2 = randomTransform.MultiplyPoint(vector2);
vector3 = randomTransform.MultiplyPoint(vector3);
Vector2 lightmapUV = combinedPositions[num].lightmapUV;
num3 = builder.AddVertexWeld((long)num3, new VertexData(v, randomTransform.MultiplyVector(vector4), SurfaceType.UNDEFINED), uVs[num3], lightmapUV, white);
builder.AddTriangle(num3, builder.AddVertexWeld((long)num4, new VertexData(vector2, randomTransform.MultiplyVector(vector5), SurfaceType.UNDEFINED), uVs[num4], lightmapUV, white), builder.AddVertexWeld((long)num5, new VertexData(vector3, randomTransform.MultiplyVector(vector6), SurfaceType.UNDEFINED), uVs[num5], lightmapUV, white));
}
index += 3;
}
}
}