public static AABB SurroundingBox(AABB c0, AABB c1)
{
if (c0 == null || c1 == null)
{
return(null);
}
vec3 min = new vec3();
vec3 max = new vec3();
for (int i = 0; i < 3; ++i)
{
min[i] = Exten.fmin(c0._min[i], c1._min[i]);
max[i] = Exten.fmax(c0._max[i], c1._max[i]);
}
return(new AABB(min, max));
}
public bool Hit(Ray ray, float min, float max)
{
for (int i = 0; i < 3; ++i)
{
float inv = 1.0f / ray.direction[i];
float t0 = (_min[i] - ray.position[i]) * inv;
float t1 = (_max[i] - ray.position[i]) * inv;
if (inv < 0)
{
float temp = t0;
t0 = t1;
t1 = temp;
}
min = Exten.fmax(t0, min);
max = Exten.fmin(t1, max);
if (min > max)
{
return(false);
}
}
return(true);
}