// Iterate over sector boxes in a range.
// TODO: Dumb version of this for small boxes
private unsafe void RasterSectorsForPhysics(BoundingBoxD range)
{
range.InflateToMinimum(EnvironmentDefinition.SectorSize);
Vector2I top = new Vector2I(1 << m_clipmaps[0].Depth) - 1;
Vector3D *pos = stackalloc Vector3D[8];
range.GetCornersUnsafe(pos);
// bitmask for faces, 7th bit is simple bit
int markedFaces = 0;
int firstFace = 0;
for (var i = 0; i < 8; ++i)
{
Vector3D copy = pos[i];
int index = MyPlanetCubemapHelper.FindCubeFace(ref copy);
firstFace = index;
index = 1 << index;
if ((markedFaces & ~index) != 0)
{
markedFaces |= 0x40;
}
markedFaces |= index;
}
// This way we can ensure a single code path.
int startFace = 0;
int endFace = 5;
// If we only encounter one face we narrow it down.
if ((markedFaces & 0x40) == 0)
{
startFace = endFace = firstFace;
}
for (int face = startFace; face <= endFace; ++face)
{
if (((1 << face) & markedFaces) == 0)
{
continue;
}
double size = m_clipmaps[face].LeafSize;
// Offset
var offset = 1 << m_clipmaps[face].Depth - 1;
BoundingBox2D bounds = BoundingBox2D.CreateInvalid();
for (int i = 0; i < 8; ++i)
{
Vector3D copy = pos[i];
Vector2D normCoords;
MyPlanetCubemapHelper.ProjectForFace(ref copy, face, out normCoords);
bounds.Include(normCoords);
}
bounds.Min += 1;
bounds.Min *= offset;
bounds.Max += 1;
bounds.Max *= offset;
// Calculate bounds in sectors.
var start = new Vector2I((int)bounds.Min.X, (int)bounds.Min.Y);
var end = new Vector2I((int)bounds.Max.X, (int)bounds.Max.Y);
Vector2I.Max(ref start, ref Vector2I.Zero, out start);
Vector2I.Min(ref end, ref top, out end);
for (int x = start.X; x <= end.X; ++x)
{
for (int y = start.Y; y <= end.Y; ++y)
{
EnsurePhysicsSector(x, y, face);
}
}
}
}
private unsafe void RasterSectorsForCollision(MyEntity entity)
{
if (!(entity is MyCubeGrid))
{
return;
}
BoundingBoxD range = entity.PositionComp.WorldAABB;
range.Inflate(8);
range.Translate(-PlanetTranslation);
Vector2I top = new Vector2I(1 << m_clipmaps[0].Depth) - 1;
Vector3D *pos = stackalloc Vector3D[8];
range.GetCornersUnsafe(pos);
// bitmask for faces, 7th bit is simple bit
int markedFaces = 0;
int firstFace = 0;
for (var i = 0; i < 8; ++i)
{
Vector3D copy = pos[i];
int index = MyPlanetCubemapHelper.FindCubeFace(ref copy);
firstFace = index;
index = 1 << index;
if ((markedFaces & ~index) != 0)
{
markedFaces |= 0x40;
}
markedFaces |= index;
}
// This way we can ensure a single code path.
int startFace = 0;
int endFace = 5;
// If we only encounter one face we narrow it down.
if ((markedFaces & 0x40) == 0)
{
startFace = endFace = firstFace;
}
for (int face = startFace; face <= endFace; ++face)
{
if (((1 << face) & markedFaces) == 0)
{
continue;
}
// Offset
var offset = 1 << m_clipmaps[face].Depth - 1;
BoundingBox2D bounds = BoundingBox2D.CreateInvalid();
for (int i = 0; i < 8; ++i)
{
Vector3D copy = pos[i];
Vector2D normCoords;
MyPlanetCubemapHelper.ProjectForFace(ref copy, face, out normCoords);
bounds.Include(normCoords);
}
bounds.Min += 1;
bounds.Min *= offset;
bounds.Max += 1;
bounds.Max *= offset;
// Calculate bounds in sectors.
var start = new Vector2I((int)bounds.Min.X, (int)bounds.Min.Y);
var end = new Vector2I((int)bounds.Max.X, (int)bounds.Max.Y);
Vector2I.Max(ref start, ref Vector2I.Zero, out start);
Vector2I.Min(ref end, ref top, out end);
for (int x = start.X; x <= end.X; ++x)
{
for (int y = start.Y; y <= end.Y; ++y)
{
long sect = MyPlanetSectorId.MakeSectorId(x, y, face);
List <MyOrientedBoundingBoxD> boxes;
if (!m_obstructorsPerSector.TryGetValue(sect, out boxes))
{
boxes = new List <MyOrientedBoundingBoxD>();
m_obstructorsPerSector.Add(sect, boxes);
}
var bb = entity.PositionComp.LocalAABB;
bb.Inflate(8); // inflate by 8m to increase the likellyhood of overlap with trees' roots.
boxes.Add(new MyOrientedBoundingBoxD((BoundingBoxD)bb, entity.PositionComp.WorldMatrix));
}
}
}
}
