public WorldData Decode(EngineVersion engineVersion, WorldTexFile texFile, ILogger log, byte[] data, int startOffset, int length)
{
WorldData worldData = new WorldData();
var reader = new DataReader(data, startOffset, length);
int numElements = reader.ReadInt32(); // 0
reader.Skip(12); // Skipping 3 ints
int numCols = reader.ReadInt32(); // x10
int numRows = reader.ReadInt32(); // x14
reader.Skip(12); // Skipping 3 ints // x18 x1c x20
int elementArrayStart = reader.ReadInt32(); // x24
reader.Skip(8); // Skipping 2 ints
int off38Cols = reader.ReadInt32();
int off38Rows = reader.ReadInt32();
int off38 = reader.ReadInt32();
reader.Skip(28);
int texll = reader.ReadInt32();
int texur = reader.ReadInt32();
int texX0 = texll % 100;
int texY0 = texll / 100;
int texX1 = texur % 100;
int texY1 = texur / 100;
reader.Skip(4);
int worldTexOffsetsOffset = reader.ReadInt32();
worldData.textureChunkOffsets = readTextureChunkOffsets(engineVersion, data, startOffset + worldTexOffsetsOffset, texX0, texY0, texX1+1, texY1);
worldData.worldElements = new List<WorldElement>(numElements);
for (int elementIdx = 0; elementIdx < numElements; ++elementIdx)
{
var element = new WorldElement();
if (EngineVersion.ReturnToArms == engineVersion)
{
reader.SetOffset(elementArrayStart + elementIdx * 0x3C);
}
else // Default to Dark Allience version
{
reader.SetOffset(elementArrayStart + elementIdx * 0x38);
}
int vifDataOffset = reader.ReadInt32();
if (EngineVersion.DarkAlliance == engineVersion)
{
int tex2 = reader.ReadInt32();
if (tex2 != 0) {
log.LogLine("Tex2=" + tex2);
}
}
int vifLen = reader.ReadInt32();
log.LogLine("-----------");
log.LogLine("vifdata: " + vifDataOffset + ", " + vifLen);
float x1 = reader.ReadFloat();
float y1 = reader.ReadFloat();
float z1 = reader.ReadFloat();
float x2 = reader.ReadFloat();
float y2 = reader.ReadFloat();
float z2 = reader.ReadFloat();
element.boundingBox = new Rect3D(x1, y1, z1, x2 - x1, y2 - y1, z2 - z1);
log.LogLine("Bounding Box: " + element.boundingBox.ToString());
int textureNum = reader.ReadInt32() / 0x40;
log.LogLine("Texture Num: " + textureNum);
int texCellxy = reader.ReadInt16();
int y = texCellxy / 100;
int x = texCellxy % 100;
if (EngineVersion.ReturnToArms == engineVersion)
{
x += texX0;
y += texY0;
}
if (textureNum != 0)
{
if (EngineVersion.ReturnToArms == engineVersion)
{
element.Texture = texFile.GetBitmapRTA(x, y, textureNum);
}
else
{
element.Texture = texFile.GetBitmap(worldData.textureChunkOffsets[y, x], textureNum);
}
}
if (element.Texture != null)
{
log.LogLine("Found in texture chunk: " + x + ", " + y);
}
var vifLogger = new StringLogger();
int texWidth = 100;
int texHeight = 100;
if (element.Texture != null)
{
texWidth = element.Texture.PixelWidth;
texHeight = element.Texture.PixelHeight;
}
byte nregs = data[startOffset + vifDataOffset + 0x10];
int vifStartOffset = (nregs + 2) * 0x10;
element.VifDataOffset = startOffset + vifDataOffset + vifStartOffset;
element.VifDataLength = vifLen*0x10 - vifStartOffset;
element.model = decodeModel(engineVersion, vifLogger, data, startOffset + vifDataOffset + vifStartOffset, vifLen * 0x10 - vifStartOffset, texWidth, texHeight);
if (EngineVersion.ReturnToArms == engineVersion)
{
int unk = reader.ReadInt16();
log.LogLine("Unknown: " + unk);
}
int posx = reader.ReadInt16();
int posy = reader.ReadInt16();
int posz = reader.ReadInt16();
log.LogLine("Position : " + posx + ", " + posy + ", " + posz);
element.pos = new Vector3D(posx / 16.0, posy / 16.0, posz / 16.0);
if (EngineVersion.ReturnToArms == engineVersion)
{
// Just a guess, maybe wrong.
element.pos = new Vector3D(posx / 16.0, posz / 16.0, posy / 16.0);
}
// I don't think RTA uses this flags scheme. From the data it looks like there are
// 2 shorts (or possibly floats) following.
int flags = reader.ReadInt32();
if ((flags & 0x01) == 0)
{
log.LogLine("Flags : " + HexUtil.formatHexUShort(flags & 0xFFFF));
element.cosAlpha = (flags >> 16) / 32767.0;
element.sinAlpha = reader.ReadInt16() / 32767.0;
log.LogLine("cos alpha : " + element.cosAlpha);
log.LogLine("sin alpha : " + element.sinAlpha);
log.LogLine("alpha(cos, sin): " + Math.Acos(element.cosAlpha) * 180.0 / Math.PI + ", " + Math.Asin(element.sinAlpha) * 180.0 / Math.PI);
element.usesRotFlags = false;
}
else
{
reader.ReadInt16(); // not necessary but makes the code more obvious.
log.LogLine("Flags : " + HexUtil.formatHex(flags));
element.xyzRotFlags = (flags >> 16) & 7;
element.usesRotFlags = true;
log.LogLine("Rot Flags : " + element.xyzRotFlags);
}
element.negYaxis = (flags & 0x40) == 0x40;
if (EngineVersion.ReturnToArms == engineVersion)
{
flags = 0;
element.usesRotFlags = true;
log.LogLine("Forcing flags to 0 until we know the format better");
}
worldData.worldElements.Add(element);
}
return worldData;
}
public WorldElementTreeViewModel(WorldElement worldElement, TreeViewItemViewModel parent, string name)
: base(parent, true)
{
_worldElement = worldElement;
_name = name;
}