private int WriteVB(BspGeometry geometry, LevelVBWriter writer)
{
if (geometry == null)
return -1;
if (geometry.Faces.Count == 0)
return -1;
TessalateFaces(geometry);
var clusterIndex = subclustersInCluster.Count;
var cluster = new List<int>();
subclustersInCluster.Add(cluster);
writer.PrepareVertexBuffer(geometry.Faces.Count * 3);
//cluster.VertexBuffer = level.VertexBuffers.Count - 1;
Dictionary<int, bool> materialMap = new Dictionary<int, bool>();
List<int> materialInices = new List<int>(geometry.Faces.Count);
foreach (var f in geometry.Faces)
{
RegisterTexture(f.Texture);
if (f.Lightmap != null && commonLightmap != f.Lightmap)
throw new ApplicationException("not atlased lightmap");
RegisterTexture(f.Lightmap);
int matIndex = writer.WriteMaterial(BuildMaterial(f));
materialInices.Add(matIndex);
materialMap[matIndex] = true;
}
foreach (int t in materialMap.Keys)
{
var sub = new Cb4aLevelVBSubcluster();
sub.Material = t;
sub.VertexBuffer = level.VertexBuffers.Count - 1;
CIwVec3 mins = new CIwVec3(int.MaxValue, int.MaxValue, int.MaxValue);
CIwVec3 maxs = new CIwVec3(int.MinValue, int.MinValue, int.MinValue);
for (int i = 0; i < materialInices.Count; ++i)
{
if (materialInices[i] == t)
{
var f = geometry.Faces[i];
//TODO: slice face into more faces
BuildFace(writer, sub, ref mins, ref maxs, f);
}
}
if (mins.x > maxs.x)
{
mins = CIwVec3.g_Zero;
maxs = CIwVec3.g_Zero;
}
sub.Mins = mins;
sub.Maxs = maxs;
if (sub.Indices.Count > 0)
{
cluster.Add(level.subclusters.Count);
level.subclusters.Add(sub);
}
}
return clusterIndex;
}
private void BuildFace(LevelVBWriter writer, Cb4aLevelVBSubcluster sub, ref CIwVec3 mins, ref CIwVec3 maxs, BspGeometryFace f)
{
while (f.Vertex0.UV0.X >= 8 || f.Vertex1.UV0.X >= 8 || f.Vertex2.UV0.X >= 8)
{
f.Vertex0.UV0.X -= 1;
f.Vertex1.UV0.X -= 1;
f.Vertex2.UV0.X -= 1;
}
while (f.Vertex0.UV0.Y >= 8 || f.Vertex1.UV0.Y >= 8 || f.Vertex2.UV0.Y >= 8)
{
f.Vertex0.UV0.Y -= 1;
f.Vertex1.UV0.Y -= 1;
f.Vertex2.UV0.Y -= 1;
}
if (f.Vertex0.UV0.X < -8) f.Vertex0.UV0.X = -8;
if (f.Vertex1.UV0.X < -8) f.Vertex1.UV0.X = -8;
if (f.Vertex2.UV0.X < -8) f.Vertex2.UV0.X = -8;
if (f.Vertex0.UV0.Y < -8) f.Vertex0.UV0.Y = -8;
if (f.Vertex1.UV0.Y < -8) f.Vertex1.UV0.Y = -8;
if (f.Vertex2.UV0.Y < -8) f.Vertex2.UV0.Y = -8;
if (f.Vertex0.Position.X < mins.x) mins.x = (int)f.Vertex0.Position.X;
if (f.Vertex1.Position.X < mins.x) mins.x = (int)f.Vertex1.Position.X;
if (f.Vertex2.Position.X < mins.x) mins.x = (int)f.Vertex2.Position.X;
if (f.Vertex0.Position.Y < mins.y) mins.y = (int)f.Vertex0.Position.Y;
if (f.Vertex1.Position.Y < mins.y) mins.y = (int)f.Vertex1.Position.Y;
if (f.Vertex2.Position.Y < mins.y) mins.y = (int)f.Vertex2.Position.Y;
if (f.Vertex0.Position.Z < mins.z) mins.z = (int)f.Vertex0.Position.Z;
if (f.Vertex1.Position.Z < mins.z) mins.z = (int)f.Vertex1.Position.Z;
if (f.Vertex2.Position.Z < mins.z) mins.z = (int)f.Vertex2.Position.Z;
if (f.Vertex0.Position.X > maxs.x) maxs.x = (int)f.Vertex0.Position.X;
if (f.Vertex1.Position.X > maxs.x) maxs.x = (int)f.Vertex1.Position.X;
if (f.Vertex2.Position.X > maxs.x) maxs.x = (int)f.Vertex2.Position.X;
if (f.Vertex0.Position.Y > maxs.y) maxs.y = (int)f.Vertex0.Position.Y;
if (f.Vertex1.Position.Y > maxs.y) maxs.y = (int)f.Vertex1.Position.Y;
if (f.Vertex2.Position.Y > maxs.y) maxs.y = (int)f.Vertex2.Position.Y;
if (f.Vertex0.Position.Z > maxs.z) maxs.z = (int)f.Vertex0.Position.Z;
if (f.Vertex1.Position.Z > maxs.z) maxs.z = (int)f.Vertex1.Position.Z;
if (f.Vertex2.Position.Z > maxs.z) maxs.z = (int)f.Vertex2.Position.Z;
var index0 = writer.Write(GetLevelVBItem(f.Vertex0));
var index1 = writer.Write(GetLevelVBItem(f.Vertex1));
var index2 = writer.Write(GetLevelVBItem(f.Vertex2));
if ((index0 == index1) || (index0 == index2) || (index2 == index1))
return;
sub.Indices.Add(index2);
sub.Indices.Add(index1);
sub.Indices.Add(index0);
}