public IGrassSplat AddGrassEntities(GrassEntitiesWithMaterials grassEntitiesWithMaterials)
{
var grassInstancesTemplate = _generator.Generate(grassEntitiesWithMaterials);
var maticesArray = grassInstancesTemplate.TransformMatices;
var uniformArrays = grassInstancesTemplate.UniformArrays;
var newGrassPacks = new List <GrassPack>();
for (var i = 0; i < Math.Ceiling((float)maticesArray.Length / Constants.MaxInstancesPerPack); i++)
{
var elementsToSkipCount = i * Constants.MaxInstancesPerPack;
var elementsToTakeCount = Math.Min(Constants.MaxInstancesPerPack,
maticesArray.Length - i * Constants.MaxInstancesPerPack);
var packMaticesArray = maticesArray.Skip(elementsToSkipCount).Take(elementsToTakeCount).ToArray();
MyMaterialPropertyBlock block = new MyMaterialPropertyBlock(elementsToTakeCount);
foreach (var aUniformArray in uniformArrays)
{
aUniformArray.AddToBlock(block.Block, elementsToSkipCount, elementsToTakeCount);
}
newGrassPacks.Add(new GrassPack(packMaticesArray, block));
}
var splatInfo = new SplatInfo(grassEntitiesWithMaterials.Mesh, grassEntitiesWithMaterials.Material);
if (!_grassPacks.ContainsKey(splatInfo))
{
_grassPacks.Add(splatInfo, new Dictionary <PackId, List <GrassPack> >());
}
lastPackId++;
_grassPacks[splatInfo][lastPackId] = newGrassPacks;
return(new GpuInstancingGrassSplat(splatInfo, lastPackId, this));
}
public GrassPack(Matrix4x4[] maticesArray, MyMaterialPropertyBlock propertiesBlock)
{
Preconditions.Assert(maticesArray.Length <= Constants.MaxInstancesPerPack,
String.Format("In grass pack there can be at max {0} elements, but is {1}", Constants.MaxInstancesPerPack, maticesArray.Length));
CastShadows = ShadowCastingMode.Off;
MaticesArray = maticesArray;
InstancesCount = maticesArray.Length;
MyBlock = propertiesBlock;
}