// Returns the contents of a LWOB
static LightwaveObject ReadObject5(ChunkReader reader)
{
// allocate an object and a default layer
var newObject = new LightwaveObject();
var currentLayer = new Layer();
newObject.Layers.Add(currentLayer);
uint pointOffset = 0;
uint polygonOffset = 0;
uint tagOffset = 0;
// process chunks as they're encountered
while (reader.BytesLeft > 0)
{
var id = reader.ReadID<ChunkType>();
var cksize = reader.ReadUInt32();
cksize += cksize & 1;
using (var subchunkReader = reader.GetSubChunk(cksize))
{
switch (id)
{
case ChunkType.ID_PNTS:
{
pointOffset = (uint)currentLayer.Points.Count;
currentLayer.Points.AddRange(
ReadPoints(subchunkReader) // throws exception on failure
);
break;
}
case ChunkType.ID_POLS:
{
polygonOffset = (uint)currentLayer.Polygons.Count;
currentLayer.Polygons.AddRange(
ReadPolygons5(subchunkReader, pointOffset) // throws exception on failure
);
break;
}
case ChunkType.ID_SRFS:
{
tagOffset = (uint)newObject.Tags.Count;
newObject.Tags.AddRange(
LightwaveObject.ReadTags(subchunkReader) // throws exception on failure
);
break;
}
case ChunkType.ID_SURF:
{
newObject.Surfaces.Add(
Surface.ReadSurface5(subchunkReader, newObject) // throws exception on failure
);
break;
}
default:
Console.WriteLine("Unknown chunk type " + reader.GetIDString((uint)id));
break;
}
}
}
if (newObject.Tags.Count == 0)
throw new Exception("No tags found for this layer"); // TODO: create a proper exception class
uint layer_index = 0;
foreach (var layer in newObject.Layers)
{
layer.CalculateBoundingBox();
newObject.CalculatePolygonNormals(layer.Points, layer.Polygons);
newObject.ResolvePointPolygons(layer.Points, layer.Polygons);
newObject.ResolvePolygonSurfaces(layer.Polygons, newObject.Tags, newObject.Surfaces, layer_index);
newObject.CalculateVertexNormals(layer.Points, layer.Polygons);
layer_index++;
}
return newObject;
}
static LightwaveObject ReadObject2(ChunkReader reader)
{
// allocate an object and a default layer
var newObject = new LightwaveObject();
var currentLayer = new Layer();
newObject.Layers.Add(currentLayer);
bool createdLayer = false;
uint pointOffset = 0;
uint polygonOffset = 0;
uint tagOffset = 0;
// process chunks as they're encountered
while (reader.BytesLeft > 0)
{
var id = reader.ReadID<ChunkType>();
var cksize = reader.ReadUInt32();
cksize += cksize & 1;
using (var subchunkReader = reader.GetSubChunk(cksize))
{
switch (id)
{
case ChunkType.ID_LAYR:
{
if (createdLayer)
{
currentLayer = new Layer();
newObject.Layers.Add(currentLayer);
}
createdLayer = true;
currentLayer.Index = subchunkReader.ReadUInt16();
currentLayer.Flags = subchunkReader.ReadUInt16();
currentLayer.pivot_x = subchunkReader.ReadSingle();
currentLayer.pivot_y = subchunkReader.ReadSingle();
currentLayer.pivot_z = subchunkReader.ReadSingle();
currentLayer.Name = subchunkReader.ReadString();
if (subchunkReader.BytesLeft > 2)
currentLayer.Parent = subchunkReader.ReadUInt16();
break;
}
case ChunkType.ID_PTAG:
{
ReadPolygonTags(subchunkReader, currentLayer.Polygons, polygonOffset, tagOffset);
break;
}
case ChunkType.ID_BBOX:
{
currentLayer.bbox_min_x = subchunkReader.ReadSingle();
currentLayer.bbox_min_y = subchunkReader.ReadSingle();
currentLayer.bbox_min_z = subchunkReader.ReadSingle();
currentLayer.bbox_max_x = subchunkReader.ReadSingle();
currentLayer.bbox_max_y = subchunkReader.ReadSingle();
currentLayer.bbox_max_z = subchunkReader.ReadSingle();
break;
}
case ChunkType.ID_PNTS:
{
pointOffset = (uint)currentLayer.Points.Count;
currentLayer.Points.AddRange(
ReadPoints(subchunkReader) // throws exception on failure
);
break;
}
case ChunkType.ID_POLS:
{
polygonOffset = (uint)currentLayer.Polygons.Count;
currentLayer.Polygons.AddRange(
ReadPolygons(subchunkReader, pointOffset) // throws exception on failure
);
break;
}
case ChunkType.ID_VMAP:
{
currentLayer.VertexMaps.Add(
VertexMap.ReadVertexMap(subchunkReader, false) // throws exception on failure
);
break;
}
case ChunkType.ID_VMAD:
{
currentLayer.VertexMaps.Add(
VertexMap.ReadVertexMap(subchunkReader, true) // throws exception on failure
);
break;
}
case ChunkType.ID_TAGS:
{
tagOffset = (uint)newObject.Tags.Count;
newObject.Tags.AddRange(
LightwaveObject.ReadTags(subchunkReader) // throws exception on failure
);
break;
}
case ChunkType.ID_ENVL:
{
newObject.Envelopes.Add(
Envelope.ReadEnvelope(subchunkReader) // throws exception on failure
);
break;
}
case ChunkType.ID_CLIP:
{
newObject.Clips.Add(
Clip.ReadClip(subchunkReader) // throws exception on failure
);
break;
}
case ChunkType.ID_SURF:
{
newObject.Surfaces.Add(
Surface.ReadSurface(subchunkReader) // throws exception on failure
);
break;
}
case ChunkType.ID_DESC: // Description Line - DESC { description-line[S0] }
case ChunkType.ID_TEXT: // Commentary Text - TEXT { comment[S0] }
case ChunkType.ID_ICON: // Thumbnail Icon Image - ICON { encoding[U2], width[U2], data[U1] * }
case ChunkType.ID_VMPA: // Vertex Map Parameter - VMPA { UV subdivision type[I4], sketch color[I4] }
break;
default:
Console.WriteLine("Unknown chunk type " + reader.GetIDString((uint)id));
break;
}
}
}
if (newObject.Tags.Count == 0)
throw new Exception("No tags found for this layer"); // TODO: create a proper exception class
uint layer_index = 0;
foreach (var layer in newObject.Layers)
{
layer.CalculateBoundingBox();
newObject.CalculatePolygonNormals(layer.Points, layer.Polygons);
newObject.ResolvePointPolygons(layer.Points, layer.Polygons);
newObject.ResolvePolygonSurfaces(layer.Polygons, newObject.Tags, newObject.Surfaces, layer_index);
newObject.CalculateVertexNormals(layer.Points, layer.Polygons);
newObject.ResolvePointVertexMaps(layer.Points, layer.VertexMaps);
newObject.ResolvePolygonVertexMaps(layer.Polygons, layer.VertexMaps);
layer_index++;
}
return newObject;
}
