// get the world transform for a vegetation object
public static Matrix GetObjectMatrix(ObjectsLstItem o)
{
return
(Matrix.CreateScale(o.Scale) *
Matrix.CreateRotationZ(MathHelper.ToRadians(-o.Heading)) *
Matrix.CreateTranslation(o.Position));
}
public static List <ObjectsLstItem> Load(Stream stream, int mapWidth, int mapHeight)
{
if (mapWidth <= 0 || mapHeight <= 0)
{
throw new ArgumentOutOfRangeException("width and height should be > 0");
}
if (mapWidth != mapHeight)
{
throw new InvalidOperationException("maps should be square");
}
using (var br = new BinaryReader(stream))
{
if (br.ReadInt32() != 0x10)
{
throw new InvalidOperationException("objects.lst: expected 0x10 header");
}
// TODO - this currently uses the unscaled size. the input to this function should probably
// be pre-scaled with the unit size, and then this calc will become (65536 / mapWidth).
float magic = 32768.0f / mapWidth;
var result = new List <ObjectsLstItem>();
while (br.BaseStream.Position < br.BaseStream.Length)
{
int xPos = br.ReadUInt16();
int yPos = br.ReadUInt16();
int zPos = br.ReadUInt16();
int objectId = br.ReadByte();
int unk123 = br.ReadByte(); // investigate... values 0 and 255. maybe 255 means no collision.
float scale = br.ReadSingle();
int heading = br.ReadInt32();
var item = new ObjectsLstItem();
item.Position = new Vector3(xPos / magic, yPos / magic, zPos / magic);
item.ObjectId = objectId;
item.Scale = scale;
item.Heading = heading * 360 / 255;
result.Add(item);
}
return(result);
}
}
