public static void ClipCameraPos(Game game, Vector3 origin, Vector3 dir, float reach, PickedPos pickedPos)
{
if (!game.CameraClipping)
{
pickedPos.SetAsInvalid();
pickedPos.IntersectPoint = origin + dir * reach;
return;
}
tracer.SetRayData(origin, dir);
World map = game.World;
BlockInfo info = game.BlockInfo;
float reachSquared = reach * reach;
int iterations = 0;
Vector3I pOrigin = Vector3I.Floor(origin);
while (iterations < 10000)
{
int x = tracer.X, y = tracer.Y, z = tracer.Z;
byte block = GetBlock(map, x, y, z, pOrigin);
Vector3 min = new Vector3(x, y, z) + info.MinBB[block];
Vector3 max = new Vector3(x, y, z) + info.MaxBB[block];
if (info.IsLiquid[block])
{
min.Y -= 1.5f / 16; max.Y -= 1.5f / 16;
}
float dx = Math.Min(Math.Abs(origin.X - min.X), Math.Abs(origin.X - max.X));
float dy = Math.Min(Math.Abs(origin.Y - min.Y), Math.Abs(origin.Y - max.Y));
float dz = Math.Min(Math.Abs(origin.Z - min.Z), Math.Abs(origin.Z - max.Z));
if (dx * dx + dy * dy + dz * dz > reachSquared)
{
pickedPos.SetAsInvalid();
pickedPos.IntersectPoint = origin + dir * reach;
return;
}
if (info.Collide[block] == CollideType.Solid && !info.IsAir[block])
{
float t0, t1;
const float adjust = 0.1f;
if (Intersection.RayIntersectsBox(origin, dir, min, max, out t0, out t1))
{
Vector3 intersect = origin + dir * t0;
pickedPos.SetAsValid(x, y, z, min, max, block, intersect);
switch (pickedPos.BlockFace)
{
case CpeBlockFace.XMin:
pickedPos.IntersectPoint.X -= adjust; break;
case CpeBlockFace.XMax:
pickedPos.IntersectPoint.X += adjust; break;
case CpeBlockFace.YMin:
pickedPos.IntersectPoint.Y -= adjust; break;
case CpeBlockFace.YMax:
pickedPos.IntersectPoint.Y += adjust; break;
case CpeBlockFace.ZMin:
pickedPos.IntersectPoint.Z -= adjust; break;
case CpeBlockFace.ZMax:
pickedPos.IntersectPoint.Z += adjust; break;
}
return;
}
}
tracer.Step();
iterations++;
}
throw new InvalidOperationException("did over 10000 iterations in ClipCameraPos(). " +
"Something has gone wrong. (dir: " + dir + ")");
}
public static void ClipCameraPos(Game game, Vector3 origin, Vector3 dir, float reach, PickedPos pickedPos)
{
if (!game.CameraClipping)
{
pickedPos.SetAsInvalid();
pickedPos.IntersectPoint = origin + dir * reach;
return;
}
Vector3I start = Vector3I.Floor(origin);
int x = start.X, y = start.Y, z = start.Z;
Vector3I step, cellBoundary;
Vector3 tMax, tDelta;
CalcVectors(origin, dir, out step, out cellBoundary, out tMax, out tDelta);
Map map = game.Map;
BlockInfo info = game.BlockInfo;
float reachSquared = reach * reach;
int iterations = 0;
while (iterations < 10000)
{
byte block = GetBlock(map, x, y, z, origin);
Vector3 min = new Vector3(x, y, z) + info.MinBB[block];
Vector3 max = new Vector3(x, y, z) + info.MaxBB[block];
float dx = Math.Min(Math.Abs(origin.X - min.X), Math.Abs(origin.X - max.X));
float dy = Math.Min(Math.Abs(origin.Y - min.Y), Math.Abs(origin.Y - max.Y));
float dz = Math.Min(Math.Abs(origin.Z - min.Z), Math.Abs(origin.Z - max.Z));
if (dx * dx + dy * dy + dz * dz > reachSquared)
{
pickedPos.SetAsInvalid();
pickedPos.IntersectPoint = origin + dir * reach;
return;
}
if (info.CollideType[block] == BlockCollideType.Solid && !info.IsAir[block])
{
float t0, t1;
const float adjust = 0.1f;
if (Intersection.RayIntersectsBox(origin, dir, min, max, out t0, out t1))
{
Vector3 intersect = origin + dir * t0;
pickedPos.SetAsValid(x, y, z, min, max, block, intersect);
switch (pickedPos.BlockFace)
{
case CpeBlockFace.XMin:
pickedPos.IntersectPoint.X -= adjust; break;
case CpeBlockFace.XMax:
pickedPos.IntersectPoint.X += adjust; break;
case CpeBlockFace.YMin:
pickedPos.IntersectPoint.Y -= adjust; break;
case CpeBlockFace.YMax:
pickedPos.IntersectPoint.Y += adjust; break;
case CpeBlockFace.ZMin:
pickedPos.IntersectPoint.Z -= adjust; break;
case CpeBlockFace.ZMax:
pickedPos.IntersectPoint.Z += adjust; break;
}
return;
}
}
Step(ref tMax, ref tDelta, ref step, ref x, ref y, ref z);
iterations++;
}
throw new InvalidOperationException("did over 10000 iterations in ClipCameraPos(). " +
"Something has gone wrong. (dir: " + dir + ")");
}