/// <summary>
/// Performs a 3-dimensional rotation on the cuboid and returns a new axis-aligned cuboid resulting from this rotation. Not sure it it makes any sense to use this for other rotations than 90 degree intervals.
/// </summary>
public Cuboidi RotatedCopy(IVec3 vec, Vec3d origin)
{
return(RotatedCopy(vec.XAsInt, vec.YAsInt, vec.ZAsInt, origin));
}
public bool RayIntersectsWithCuboid(Cuboidd selectionBox, ref BlockFacing hitOnBlockFace, ref Vec3d hitPosition)
{
if (selectionBox == null)
{
return(false);
}
double w = selectionBox.X2 - selectionBox.X1;
double h = selectionBox.Y2 - selectionBox.Y1;
double l = selectionBox.Z2 - selectionBox.Z1;
for (int i = 0; i < BlockFacing.NumberOfFaces; i++)
{
BlockFacing blockSideFacing = BlockFacing.ALLFACES[i];
Vec3i planeNormal = blockSideFacing.Normali;
// Dot product of 2 vectors
// If they are parallel the dot product is 1
// At 90 degrees the dot product is 0
double demon = planeNormal.X * ray.dir.X + planeNormal.Y * ray.dir.Y + planeNormal.Z * ray.dir.Z;
// Does intersect this plane somewhere (only negative because we are not interested in the ray leaving a face, negative because the ray points into the cube, the plane normal points away from the cube)
if (demon < -0.00001)
{
Vec3d planeCenterPosition = blockSideFacing.PlaneCenter
.ToVec3d()
.Mul(w, h, l)
.Add(selectionBox.X1, selectionBox.Y1, selectionBox.Z1)
;
Vec3d pt = Vec3d.Sub(planeCenterPosition, ray.origin);
double t = (pt.X * planeNormal.X + pt.Y * planeNormal.Y + pt.Z * planeNormal.Z) / demon;
if (t >= 0)
{
hitPosition = new Vec3d(ray.origin.X + ray.dir.X * t, ray.origin.Y + ray.dir.Y * t, ray.origin.Z + ray.dir.Z * t);
lastExitedBlockFacePos = Vec3d.Sub(hitPosition, planeCenterPosition);
// Does intersect this plane within the block
if (Math.Abs(lastExitedBlockFacePos.X) <= w / 2 && Math.Abs(lastExitedBlockFacePos.Y) <= h / 2 && Math.Abs(lastExitedBlockFacePos.Z) <= l / 2)
{
hitOnBlockFace = blockSideFacing;
return(true);
}
}
}
}
return(false);
}
public bool Contains(Vec3d pos)
{
return(pos.X >= MinX && pos.X < MaxX && pos.Y >= MinY && pos.Y < MaxY && pos.Z >= MinZ && pos.Z < MaxZ);
}
public double Dot(Vec3d a)
{
return(X * a.X + Y * a.Y + Z * a.Z);
}
public Vec3d SubCopy(Vec3d sub)
{
return(new Vec3d(X - sub.X, Y - sub.Y, Z - sub.Z));
}
public Vec3d AddCopy(Vec3d a)
{
return(new Vec3d(X + a.X, Y + a.Y, Z + a.Z));
}
public void Cross(Vec3d a, Vec4d b)
{
X = a.Y * b.Z - a.Z * b.Y;
Y = a.Z * b.X - a.X * b.Z;
Z = a.X * b.Y - a.Y * b.X;
}
