public async System.Threading.Tasks.Task <CGfxVertexCloud> GetVertexCloud(RName name)
{
CGfxVertexCloud vc;
if (VertexClouds.TryGetValue(name, out vc))
{
return(vc);
}
vc = new CGfxVertexCloud();
var xnd = await IO.XndHolder.LoadXND(name.Address);
if (xnd == null)
{
return(null);
}
if (false == await vc.LoadXnd(xnd.Node))
{
return(null);
}
CGfxVertexCloud prev;
if (VertexClouds.TryGetValue(name, out prev))
{
return(prev);
}
VertexClouds.Add(name, vc);
return(vc);
}
public static async System.Threading.Tasks.Task <CGfxVertexCloud> CookFromMesh(CRenderContext rc, CGfxMeshPrimitives mesh, float density = 1.0f)
{
mesh.PreUse(true);
var result = new CGfxVertexCloud();
var posVB = mesh.GeometryMesh.GetVertexBuffer(EVertexSteamType.VST_Position);
if (posVB == null)
{
return(null);
}
var uvVB = mesh.GeometryMesh.GetVertexBuffer(EVertexSteamType.VST_UV);
if (uvVB == null)
{
return(null);
}
var indexBuff = mesh.GeometryMesh.GetIndexBuffer();
if (indexBuff == null)
{
return(null);
}
var posBlob = new Support.CBlobObject();
var uvBlob = new Support.CBlobObject();
var indexBlob = new Support.CBlobObject();
await CEngine.Instance.EventPoster.Post(() =>
{
posVB.GetBufferData(rc, posBlob);
uvVB.GetBufferData(rc, uvBlob);
if (density != 1.0f)
{
indexBuff.GetBufferData(rc, indexBlob);
}
return(true);
}, Thread.Async.EAsyncTarget.Render);
//await posVB.GetBufferData(rc, posBlob);
//await uvVB.GetBufferData(rc, uvBlob);
if (density == 1.0f)
{
unsafe
{
UInt32 num = posBlob.Size / (UInt32)sizeof(Vector3);
result.Positions = new Vector3[num];
Vector3 *src = (Vector3 *)posBlob.Data.ToPointer();
fixed(Vector3 *dst = &result.Positions[0])
{
for (UInt32 i = 0; i < num; i++)
{
dst[i] = src[i];
}
}
num = uvBlob.Size / (UInt32)sizeof(Vector2);
result.Datas = new Vector4[num];
Vector2 *src2 = (Vector2 *)uvBlob.Data.ToPointer();
fixed(Vector4 *dst = &result.Datas[0])
{
for (UInt32 i = 0; i < num; i++)
{
dst[i].X = src2[i].X;
dst[i].Y = src2[i].Y;
}
}
}
}
else
{
List <TSurface> surfaces = new List <TSurface>();
unsafe
{
UInt32 num = posBlob.Size / (UInt32)sizeof(Vector3);
UInt32 numindex = 0;
Vector3 *src = (Vector3 *)posBlob.Data.ToPointer();
if (indexBuff.Desc.Type == EIndexBufferType.IBT_Int16)
{
numindex = indexBlob.Size / sizeof(UInt16);
UInt16 *indices = (UInt16 *)indexBlob.Data.ToPointer();
for (int i = 0; i < numindex; i += 3)
{
surfaces.Add(CreateSurface(ref src[indices[i]], ref src[indices[i + 1]], ref src[indices[i + 2]]));
}
}
else
{
numindex = indexBlob.Size / sizeof(UInt32);
UInt32 *indices = (UInt32 *)indexBlob.Data.ToPointer();
for (int i = 0; i < numindex; i += 3)
{
surfaces.Add(CreateSurface(ref src[indices[i]], ref src[indices[i + 1]], ref src[indices[i + 2]]));
}
}
//根据面积排序
surfaces.Sort((a, b) =>
{
if (a.S > b.S)
{
return(1);
}
else if (a.S < b.S)
{
return(-1);
}
return(0);
});
//填充点
List <Vector3> Positions = new List <Vector3>();
for (UInt32 i = 0; i < num; i++)
{
Positions.Add(src[i]);
}
int count = (int)((density - 1f) / 0.5f);
for (int n = 0; n < count; n++)
{
int surfacecount = surfaces.Count / 2;
for (int i = surfaces.Count - 1; i >= surfacecount; i--)
{
Positions.Add((surfaces[i].Point1 + surfaces[i].Point2 + surfaces[i].Point3) / 3);
var p1 = (surfaces[i].Point1 + surfaces[i].Point2) / 2;
var p2 = (surfaces[i].Point2 + surfaces[i].Point3) / 2;
var p3 = (surfaces[i].Point3 + surfaces[i].Point1) / 2;
var ss = surfaces[i].S;
var sss = surfaces[surfaces.Count - 1 - i].S;
Positions.Add(p1);
Positions.Add(p2);
Positions.Add(p3);
surfaces.RemoveAt(surfaces.Count - 1);
surfaces.Add(CreateSurface(ref p1, ref p2, ref p3));
}
if (n != count - 1)
{
surfaces.Sort((a, b) =>
{
if (a.S > b.S)
{
return(1);
}
else if (a.S < b.S)
{
return(-1);
}
return(0);
});
}
}
result.Positions = new Vector3[Positions.Count];
fixed(Vector3 *dst = &result.Positions[0])
{
for (int i = 0; i < Positions.Count; i++)
{
dst[i] = Positions[i];
}
}
result.Datas = new Vector4[1];
}
}
return(result);
}
