public override void CreateGeometryForObjects(Device device, ICollection <IAtom> objs,
GeomDataBufferStream geomStream, int stream,
ref BufferedGeometryData buffer, CompleteOutputDescription coDesc)
{
// fillable fields
int positionPos = -1;
int normalPos = -1;
int diffusePos = -1;
// match field locations
for (int i = 0; i < fields.Length; i++)
{
for (int gf = 0; gf < geomStream.Fields.Length; gf++)
{
if (fields[i].Format == geomStream.Fields[gf])
{
if (fields[i].Usage == "POSITION")
{
positionPos = geomStream.FieldPositions[gf];
}
else if (fields[i].Usage == "NORMAL")
{
normalPos = geomStream.FieldPositions[gf];
}
else if (fields[i].Usage == "DIFFUSE")
{
diffusePos = geomStream.FieldPositions[gf];
}
break;
}
}
}
// actually create the metaball triangles or points
IVolume[] volumes = new IVolume[objs.Count];
int sIdx = 0;
AtomShadingDesc aShading = coDesc.AtomShadingDesc;
IMoleculeMaterialLookup lookup = aShading.MoleculeMaterials;
foreach (IAtom atom in objs)
{
IMoleculeMaterialTemplate matTemp = lookup.ResolveBySymbol(atom.Symbol);
IMoleculeMaterial material = null;
if (matTemp != null)
{
material = matTemp.BySymbol;
}
else
{
PeriodicTableElement pe = (PeriodicTableElement)atom.Properties["PeriodicTableElement"];
if (pe != null)
{
material = lookup.GetBySeries(pe.ChemicalSerie);
}
}
volumes[sIdx++] = new Metaball(new Vector3((float)atom.X3d, (float)atom.Y3d, (float)atom.Z3d), 0.17f, material.BaseColor);
}
// process volume into triangles
GenericVolumeScene scene = new GenericVolumeScene(volumes);
int[] triangles = null;
Vector3[] vertices;
Color[] colours;
Vector3[] normals = null;
if (!pointsOnly)
{
IsosurfaceGenerator3D.GenerateSimpleMesh(scene, new Vector3(), scene.EstimateVolumeMaxSize(), 40, false, out triangles, out vertices, out colours);
MeshOptimzer.GenerateTriPointNormals(triangles, vertices, out normals);
}
else
{
IsosurfaceGenerator3D.GenerateSimplePointOutline(scene, new Vector3(), scene.EstimateVolumeMaxSize(), 40, out vertices, out colours);
}
// create buffers
buffer = new BufferedGeometryData(device, objs.Count);
buffer.vBuffers = new BufferedGeometryData.VertexData[1];
buffer.vBuffers[0] = new BufferedGeometryData.VertexData();
buffer.vBuffers[0].Buffer = new VertexBuffer(device, geomStream.Stride * vertices.Length,
Usage.WriteOnly, geomStream.Format, Pool.Managed);
buffer.vBuffers[0].Stride = geomStream.Stride;
buffer.vBuffers[0].NumElements = vertices.Length;
buffer.vBuffers[0].Format = geomStream.Format;
buffer.iBuffers = new BufferedGeometryData.IndexData[1];
buffer.iBuffers[0] = new BufferedGeometryData.IndexData();
buffer.iBuffers[0].Desc = BufferedGeometryData.IndexData.Description.Geometry;
if (pointsOnly)
{
buffer.iBuffers[0].NumPrimitives = vertices.Length;
buffer.iBuffers[0].PrimType = PrimitiveType.PointList;
buffer.Light = false;
}
else
{
buffer.iBuffers[0].NumPrimitives = triangles.Length / 3;
buffer.iBuffers[0].PrimType = PrimitiveType.TriangleList;
buffer.iBuffers[0].Buffer = new IndexBuffer(typeof(int), triangles.Length, device, Usage.WriteOnly, Pool.Managed);
}
// lock stream
GraphicsStream data = buffer.vBuffers[0].Buffer.Lock(0, 0, LockFlags.None);
// fill fields
int clr = Color.FromArgb(255, 255, 255).ToArgb();
long pos = 0;
for (int i = 0; i < vertices.Length; i++)
{
if (positionPos != -1)
{
data.Seek(pos + positionPos, SeekOrigin.Begin);
data.Write(vertices[i].X);
data.Write(vertices[i].Y);
data.Write(vertices[i].Z);
}
if (normalPos != -1 && !pointsOnly)
{
data.Seek(pos + normalPos, SeekOrigin.Begin);
data.Write(normals[i].X);
data.Write(normals[i].Y);
data.Write(normals[i].Z);
}
if (diffusePos != -1)
{
data.Seek(pos + diffusePos, SeekOrigin.Begin);
data.Write(colours[i].ToArgb());
}
//verts[i].Color = colours[i].ToArgb();
pos += geomStream.Stride;
}
buffer.vBuffers[0].Buffer.Unlock();
if (!pointsOnly)
{
buffer.iBuffers[0].Buffer.SetData(triangles, 0, LockFlags.None);
}
// dispose of temp data
}
