public static AxisAlignedBoundingBox SurroundingBox(AxisAlignedBoundingBox box0, AxisAlignedBoundingBox box1)
{
var small = new Vec3(Math.Min(box0.Min().X(), box1.Min().X()),
Math.Min(box0.Min().Y(), box1.Min().Y()),
Math.Min(box0.Min().Z(), box1.Min().Z()));
var big = new Vec3(Math.Max(box0.Max().X(), box1.Max().X()),
Math.Max(box0.Max().Y(), box1.Max().Y()),
Math.Max(box0.Max().Z(), box1.Max().Z()));
return(new AxisAlignedBoundingBox(small, big));
}
public RotateY(Hitable hitable, double angle)
{
_hitable = hitable;
double radians = (Math.PI / 180.0) * angle;
_sinTheta = Math.Sin(radians);
_cosTheta = Math.Cos(radians);
_hasbox = _hitable.BoundingBox(0, 1, out _bbox);
Vec3 min = new Vec3(double.MaxValue, double.MaxValue, double.MaxValue);
Vec3 max = new Vec3(-double.MaxValue, -double.MaxValue, -double.MaxValue);
for (int i = 0; i < 2; i++)
{
for (int j = 0; j < 2; j++)
{
for (int k = 0; k < 2; k++)
{
double x = i * _bbox.Max().X() + (1 - i) * _bbox.Min().X();
double y = j * _bbox.Max().Y() + (1 - j) * _bbox.Min().Y();
double z = k * _bbox.Max().Z() + (1 - k) * _bbox.Min().Z();
double newX = _cosTheta * x + _sinTheta * z;
double newZ = -_sinTheta * x + _cosTheta * z;
Vec3 tester = new Vec3(newX, y, newZ);
for (int c = 0; c < 3; c++)
{
if (tester[c] > max[c])
{
max[c] = tester[c];
}
if (tester[c] < min[c])
{
min[c] = tester[c];
}
}
}
}
}
_bbox = new AxisAlignedBoundingBox(min, max);
}