public override BBox WorldBound()
{
BBox worldBounds = new BBox();
for (int i = 0; i < nverts; i++)
worldBounds = BBox.Union(worldBounds, p[i]);
return worldBounds;
}
public override BBox ObjectBound()
{
BBox objectBounds = new BBox();
for (int i = 0; i < nverts; i++)
objectBounds = BBox.Union(objectBounds, (WorldToObject)[p[i]]);
return objectBounds;
}
public void Union(BBox b2)
{
var min = new Point();
min.X = MathHelper.Min(Min.X, b2.Min.X);
min.Y = MathHelper.Min(Min.Y, b2.Min.Y);
min.Z = MathHelper.Min(Min.Z, b2.Min.Z);
Min = min;
var max = new Point();
max.X = MathHelper.Max(Max.X, b2.Max.X);
max.Y = MathHelper.Max(Max.Y, b2.Max.Y);
max.Z = MathHelper.Max(Max.Z, b2.Max.Z);
Max = max;
}
public static BBox Union(BBox box, Point point)
{
BBox ret = box;
var min = new Point();
min.X = MathHelper.Min(box.Min.X, point.X);
min.Y = MathHelper.Min(box.Min.Y, point.Y);
min.Z = MathHelper.Min(box.Min.Z, point.Z);
ret.Min = min;
var max = new Point();
max.X = MathHelper.Max(box.Max.X, point.X);
max.Y = MathHelper.Max(box.Max.Y, point.Y);
max.Z = MathHelper.Max(box.Max.Z, point.Z);
ret.Max = max;
return ret;
}
public BBox MotionBounds(BBox b, bool useInverse)
{
if (!actuallyAnimated) return Transform.Inverse(startTransform)[b];
BBox ret = new BBox();
int nSteps = 128;
for (int i = 0; i < nSteps; ++i)
{
Transform t = new Transform();
float time = MathHelper.Lerp(((float)i) / ((float)nSteps - 1), startTime, endTime);
Interpolate(time, t);
if (useInverse) t = Transform.Inverse(t);
ret = BBox.Union(ret, t[b]);
}
return ret;
}
public BBox this[BBox b]
{
get
{
Transform M = this;
BBox ret = new BBox(M[new Point(b.Min.X, b.Min.Y, b.Min.Z)]);
ret = BBox.Union(ret, M[new Point(b.Max.X, b.Min.Y, b.Min.Z)]);
ret = BBox.Union(ret, M[new Point(b.Min.X, b.Max.Y, b.Min.Z)]);
ret = BBox.Union(ret, M[new Point(b.Min.X, b.Min.Y, b.Max.Z)]);
ret = BBox.Union(ret, M[new Point(b.Min.X, b.Max.Y, b.Max.Z)]);
ret = BBox.Union(ret, M[new Point(b.Max.X, b.Max.Y, b.Min.Z)]);
ret = BBox.Union(ret, M[new Point(b.Max.X, b.Min.Y, b.Max.Z)]);
ret = BBox.Union(ret, M[new Point(b.Max.X, b.Max.Y, b.Max.Z)]);
return ret;
}
}
public bool Overlaps(BBox b)
{
bool x = (Max.X >= b.Min.X) && (Min.X <= b.Max.X);
bool y = (Max.Y >= b.Min.Y) && (Min.Y <= b.Max.Y);
bool z = (Max.Z >= b.Min.Z) && (Min.Z <= b.Max.Z);
return (x && y && z);
}
public static BBox Union(BBox b1, BBox b2)
{
b1.Union(b2);
return b1;
}
