private void ProcessCellGrass(FoliageCellDataRuntime runtimeCell)
{
for (int i = 0, len = runtimeCell.m_FoliageDataSubdivided.Length; i < len; i++)
{
FoliageCellSubdividedDataRuntime runtimeCellSubdivided = runtimeCell.m_FoliageDataSubdivided[i].Value;
float subdivDistance = runtimeCellSubdivided.m_Bounds.SqrDistance(m_CurrentFrameCameraPosition);
if (subdivDistance <= m_MaxDistanceGrassSqr && GeometryUtility.TestPlanesAABB(m_CameraPlanes, runtimeCellSubdivided.m_Bounds))
{
ProcessSubdividedCell(runtimeCell, runtimeCellSubdivided, subdivDistance);
m_DrawStats.m_ProcessedCellsSubdiv++;
}
}
}
private void ProcessSubdividedCell(FoliageCellDataRuntime cell, FoliageCellSubdividedDataRuntime cellSubdivided, float distance)
{
for (int foliageType = 0, foliageTypeCount = cellSubdivided.m_TypeHashLocationsRuntime.Length; foliageType < foliageTypeCount; foliageType++)
{
FoliageType type = m_FoliageTypes[cellSubdivided.m_TypeHashLocationsRuntime[foliageType].Key];
float maxTypeDist = type.m_RenderInfo.m_MaxDistance * type.m_RenderInfo.m_MaxDistance;
if (distance <= maxTypeDist)
{
var batches = cellSubdivided.m_TypeHashLocationsRuntime[foliageType].Value.m_EditTime;
// Set the MPB values that are universal for all grass types
MaterialPropertyBlock mpb = type.m_RuntimeData.m_TypeMPB;
mpb.SetFloat(m_ShaderIDCritiasFoliageDistance, type.m_RenderInfo.m_MaxDistance);
mpb.SetFloat(m_ShaderIDCritiasFoliageDistanceSqr, maxTypeDist);
// TODO: Set bend data if we have it for this type
if (type.m_EnableBend)
{
mpb.SetFloat(m_ShaderIDCritiasBendDistance, type.m_BendDistance);
mpb.SetFloat(m_ShaderIDCritiasBendScale, type.m_BendPower);
mpb.SetVector(m_ShaderIDCritiasBendPosition, m_CurrentFrameBendPosition);
}
// Get data from the type
Mesh mesh = type.m_RuntimeData.m_LODDataGrass.m_Mesh;
Material mat = type.m_RuntimeData.m_LODDataGrass.m_Material;
// Only if we have the type for rendering indirect
if (type.RenderIndirect && m_CurrentFrameAllowIndirect)
{
long indirectCachedDataKey = ((((long)cell.m_Position.GetHashCode()) << 32) | ((long)cellSubdivided.m_Position.GetHashCode())) + type.m_Hash; // * 0xF01226E02D41B
if (m_CachedGPUBufferData.ContainsKey(indirectCachedDataKey) == false)
{
GPUBufferCellCachedData data = new GPUBufferCellCachedData();
// Merge the buffers
Matrix4x4[] allInstances;
// Build all the data
if (batches.Length > 1)
{
int totalCount = 0;
for (int batchIdx = 0; batchIdx < batches.Length; batchIdx++)
{
totalCount += batches[batchIdx].Length;
}
List <Matrix4x4> concat = new List <Matrix4x4>(totalCount);
for (int batchIdx = 0; batchIdx < batches.Length; batchIdx++)
{
concat.AddRange(batches[batchIdx]);
}
allInstances = concat.ToArray();
}
else
{
allInstances = batches[0];
}
// Set the position data
data.m_BufferPositions = new ComputeBuffer(allInstances.Length, 64);
data.m_BufferPositions.SetData(allInstances);
// Set the arguments
data.m_BufferArguments = new ComputeBuffer(1, m_TempDrawArgs.Length * sizeof(uint), ComputeBufferType.IndirectArguments);
data.m_IndexCount = mesh.GetIndexCount(0);
// Set the instance count
data.m_InstanceCount = (uint)allInstances.Length;
// Add the data. The cache will take care of clearing the data that is in excess
m_CachedGPUBufferData.Add(indirectCachedDataKey, data);
}
GPUBufferCellCachedData indirectData = m_CachedGPUBufferData[indirectCachedDataKey];
// Set the buffer positions
mpb.SetBuffer(m_ShaderIDCritiasInstanceBuffer, indirectData.m_BufferPositions);
// Set the draw count and send it
m_TempDrawArgs[0] = indirectData.m_IndexCount;
m_TempDrawArgs[1] = (uint)(indirectData.m_InstanceCount * m_Settings.m_GrassDensity);
indirectData.m_BufferArguments.SetData(m_TempDrawArgs);
// Draw without shadows
Graphics.DrawMeshInstancedIndirect(mesh, 0, mat, cellSubdivided.m_Bounds, indirectData.m_BufferArguments, 0, mpb, ShadowCastingMode.Off, true, m_CurrentFrameLayer, m_CurrentFrameCameraDraw);
}
else
{
// Cast shadow only if the type allows
ShadowCastingMode castShadow = type.m_RenderInfo.m_CastShadow ? ShadowCastingMode.On : ShadowCastingMode.Off;
// Pass with the MPB the data related to per-type distance
for (int i = 0, batchCount = batches.Length; i < batchCount; i++)
{
Graphics.DrawMeshInstanced(mesh, 0, mat, batches[i], (int)(batches[i].Length * m_Settings.m_GrassDensity), mpb, castShadow, true, m_CurrentFrameLayer, m_CurrentFrameCameraDraw);
m_DrawStats.m_ProcessedDrawCalls++;
}
}
}
}
}
/**
* Load from file the runtime version of the data
*/
public static FoliageDataRuntime LoadFromFileRuntime(string filename)
{
FoliageData data = LoadFromFileEditTime(filename);
// Build the runtime data from the edit time data
FoliageDataRuntime runtime = new FoliageDataRuntime();
foreach (var hashedCell in data.m_FoliageData)
{
FoliageCellData editCell = hashedCell.Value;
FoliageCellDataRuntime runtimeCell = new FoliageCellDataRuntime();
// Set the data. Note that we only need the extended bounds
runtimeCell.m_Bounds = editCell.m_BoundsExtended;
runtimeCell.m_Position = editCell.m_Position;
// Build the tree instance data
int idx = -1;
runtimeCell.m_TypeHashLocationsRuntime = new FoliageKeyValuePair <int, FoliageTuple <FoliageInstance[]> > [editCell.m_TypeHashLocationsEditor.Count];
foreach (var instances in editCell.m_TypeHashLocationsEditor)
{
idx++;
List <FoliageInstance> allTreeInstances = new List <FoliageInstance>();
var labeledInstances = instances.Value;
// Build all the data from the labeled data
foreach (List <FoliageInstance> inst in labeledInstances.Values)
{
allTreeInstances.AddRange(inst);
}
// We will build the world matrix for trees
for (int i = 0; i < allTreeInstances.Count; i++)
{
FoliageInstance inst = allTreeInstances[i];
inst.BuildWorldMatrix();
allTreeInstances[i] = inst;
}
// Don't forget to trim all excess instances!
allTreeInstances.TrimExcess();
#if UNITY_EDITOR
if (allTreeInstances.Count == 0)
{
Debug.Assert(false, "Count 0!");
}
#endif
runtimeCell.m_TypeHashLocationsRuntime[idx] = new FoliageKeyValuePair <int, FoliageTuple <FoliageInstance[]> >(instances.Key, new FoliageTuple <FoliageInstance[]>(allTreeInstances.ToArray()));
}
// Build the grass instance data from the subdivided cells
List <FoliageKeyValuePair <int, FoliageCellSubdividedDataRuntime> > foliageCellDataSubdivided = new List <FoliageKeyValuePair <int, FoliageCellSubdividedDataRuntime> >(editCell.m_FoliageDataSubdivided.Count);
foreach (var hashedSubdividedCell in editCell.m_FoliageDataSubdivided)
{
FoliageCellSubdividedData editSubdividedCell = hashedSubdividedCell.Value;
FoliageCellSubdividedDataRuntime runtimeSubdividedCell = new FoliageCellSubdividedDataRuntime();
// Set the data
runtimeSubdividedCell.m_Bounds = editSubdividedCell.m_Bounds;
runtimeSubdividedCell.m_Position = editSubdividedCell.m_Position;
idx = -1;
runtimeSubdividedCell.m_TypeHashLocationsRuntime = new FoliageKeyValuePair <int, FoliageTuple <Matrix4x4[][]> > [editSubdividedCell.m_TypeHashLocationsEditor.Count];
foreach (var instances in editSubdividedCell.m_TypeHashLocationsEditor)
{
idx++;
List <FoliageInstance> allGrassInstances = new List <FoliageInstance>();
var labeledInstances = instances.Value;
foreach (List <FoliageInstance> inst in labeledInstances.Values)
{
allGrassInstances.AddRange(inst);
}
#if UNITY_EDITOR
if (allGrassInstances.Count == 0)
{
Debug.Assert(false, "Count 0!");
}
#endif
// Build the multi-array data
int ranges = Mathf.CeilToInt(allGrassInstances.Count / (float)FoliageGlobals.RENDER_BATCH_SIZE);
Matrix4x4[][] batches = new Matrix4x4[ranges][];
for (int i = 0; i < ranges; i++)
{
List <FoliageInstance> range = allGrassInstances.GetRange(i * FoliageGlobals.RENDER_BATCH_SIZE,
i * FoliageGlobals.RENDER_BATCH_SIZE + FoliageGlobals.RENDER_BATCH_SIZE > allGrassInstances.Count
? allGrassInstances.Count - i * FoliageGlobals.RENDER_BATCH_SIZE
: FoliageGlobals.RENDER_BATCH_SIZE);
batches[i] = range.ConvertAll <Matrix4x4>((x) => x.GetWorldTransform()).ToArray();
}
// Set the data
runtimeSubdividedCell.m_TypeHashLocationsRuntime[idx] = new FoliageKeyValuePair <int, FoliageTuple <Matrix4x4[][]> >(instances.Key, new FoliageTuple <Matrix4x4[][]>(batches));
}
// Add the subdivided runtime cell
foliageCellDataSubdivided.Add(new FoliageKeyValuePair <int, FoliageCellSubdividedDataRuntime>(hashedSubdividedCell.Key, runtimeSubdividedCell));
}
// Build the subdivided data
runtimeCell.m_FoliageDataSubdivided = foliageCellDataSubdivided.ToArray();
// Add the runtime cell
runtime.m_FoliageData.Add(hashedCell.Key, runtimeCell);
}
// Good for GC
data = null;
return(runtime);
}