private static ZoneInfo LoadZone(BinaryReader reader)
{
var id = reader.ReadUInt32();
if (_zones[id] == null)
{
_zones[id] = new ZoneInfo();
}
var zone = _zones[id];
zone.ID = id;
zone.OffsetX = reader.ReadUInt32();
zone.OffsetY = reader.ReadUInt32();
// These are not really needed right now, and are just hints anyway
UInt32 numNifs = reader.ReadUInt32();
UInt32 numFixtures = reader.ReadUInt32();
return(zone);
}
public static OcclusionResult OcclusionQuery(
ushort zoneId0, float x0, float y0, float z0,
ushort zoneId1, float x1, float y1, float z1, ref Vector3 hitpoint)
{
OcclusionResult result;
SegmentTestInfo info = new SegmentTestInfo();
long timeBegin = DebugEnable ? Timer.Value : 0;
try
{
ZoneInfo zone = _zones[zoneId0];
if (zone == null || zone.Collision == null)
{
result = OcclusionResult.NotLoaded;
}
else if (!zone.Enabled)
{
return(OcclusionResult.NotEnabled);
}
else if (zoneId0 != zoneId1)
{
result = OcclusionResult.NotImplemented;
}
else
{
x0 = 65535.0f - x0;
x1 = 65535.0f - x1;
Vector3 p0 = new Vector3(x0, y0, z0), p1 = new Vector3(x1, y1, z1);
if (SegmentTest(p0, p1, zone.Collision, zone.Collision.BSP, 0, ref info))
{
bool hit = true;
double nearest = GetDistance(p0, info.HitPoint);
var hitPoint = new Vector3(info.HitPoint.X, info.HitPoint.Y, info.HitPoint.Z);
hitpoint = info.HitPoint;
int count = 0;
//find the nearest to origin triangle hit
while (hit)
{
var nextPoint = Lerp(info.HitPoint, p0, 0.01);
hit = SegmentTest(p0, nextPoint, zone.Collision, zone.Collision.BSP, 0, ref info);
if (hit && (info.HitPoint.X != hitPoint.X || info.HitPoint.Y != hitPoint.Y || info.HitPoint.Z != hitPoint.Z) &&
GetDistance(p0, info.HitPoint) < nearest)
{
hitpoint = info.HitPoint;
}
hitPoint = new Vector3(info.HitPoint.X, info.HitPoint.Y, info.HitPoint.Z);
if (count > 100)
{
break;
}
count++;
}
result = OcclusionResult.Occluded;
hitpoint.X = 65535.0f - hitpoint.X;
}
else
{
result = OcclusionResult.NotOccluded;
}
}
}
catch
{
result = OcclusionResult.InternalError;
}
if (DebugEnable)
{
long microseconds = (Timer.Value - timeBegin) * 1000000 / Timer.Frequency;
float timePerTri = microseconds / (float)info.NumTrianglesTested;
String msg = String.Format(
"LOS Check: ({0}, {1}, {2}, {3}) -> ({4}, {5}, {6}, {7}) -> ",
zoneId0, x0, y0, z0, zoneId1, x1, y1, z1);
Console.Write(msg);
Console.WriteLine(result.ToString() + " [nodes=" + info.NumNodesTested + ", triangles=" + info.NumTrianglesTested + ", μs=" + microseconds + ", μs/tri=" + timePerTri + "]");
}
return(result);
}
private static CollisionInfo LoadCollisionChunk(BinaryReader reader)
{
CollisionInfo collision = new CollisionInfo();
uint zoneID = reader.ReadUInt32();
// Read collision vertices
uint vertexCount = reader.ReadUInt32();
collision.Vertices = new Vector3[vertexCount];
for (uint i = 0; i < vertexCount; i++)
{
collision.Vertices[i] = ReadVector3(reader);
}
// Read collision triangles
uint triangleCount = reader.ReadUInt32();
uint indexSize = reader.ReadUInt32();
collision.Triangles = new TriangleInfo[triangleCount];
// int ii = 0;
if (indexSize == 4)
{
for (uint i = 0; i < triangleCount; i++)
{
collision.Triangles[i] = new TriangleInfo()
{
i0 = reader.ReadUInt32(),
i1 = reader.ReadUInt32(),
i2 = reader.ReadUInt32(),
fixture = reader.ReadUInt32()
};
if (!collision.Fixtures.ContainsKey(collision.Triangles[i].fixture))
{
collision.Fixtures[collision.Triangles[i].fixture] = new FixtureInfo();
}
collision.Fixtures[collision.Triangles[i].fixture].Triangles.Add(i);
}
//for (uint i = 0; i <3 * triangleCount; i++)
//{
// collision.Indices[i] = reader.ReadUInt32();
//}
}
else if (indexSize == 2)
{
throw new NotImplementedException();
}
else
{
throw new Exception();
}
if (_zones[zoneID] == null)
{
_zones[zoneID] = new ZoneInfo();
}
_zones[zoneID].Collision = collision;
return(collision);
}