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-// This code is in the public domain -- castanyo@yahoo.es
-
-#pragma once
-#ifndef NV_MATH_BOX_INL
-#define NV_MATH_BOX_INL
-
-#include "Box.h"
-#include "Vector.inl"
-
-#include <float.h> // FLT_MAX
-
-namespace nv
-{
- // Default ctor.
- //inline Box::Box() { };
-
- // Copy ctor.
- //inline Box::Box(const Box & b) : minCorner(b.minCorner), maxCorner(b.maxCorner) { }
-
- // Init ctor.
- //inline Box::Box(const Vector3 & mins, const Vector3 & maxs) : minCorner(mins), maxCorner(maxs) { }
-
- // Assignment operator.
- inline Box & Box::operator=(const Box & b) { minCorner = b.minCorner; maxCorner = b.maxCorner; return *this; }
-
- // Clear the bounds.
- inline void Box::clearBounds()
- {
- minCorner.set(FLT_MAX, FLT_MAX, FLT_MAX);
- maxCorner.set(-FLT_MAX, -FLT_MAX, -FLT_MAX);
- }
-
- // min < max
- inline bool Box::isValid() const
- {
- return minCorner.x <= maxCorner.x && minCorner.y <= maxCorner.y && minCorner.z <= maxCorner.z;
- }
-
- // Build a cube centered on center and with edge = 2*dist
- inline void Box::cube(const Vector3 & center, float dist)
- {
- setCenterExtents(center, Vector3(dist));
- }
-
- // Build a box, given center and extents.
- inline void Box::setCenterExtents(const Vector3 & center, const Vector3 & extents)
- {
- minCorner = center - extents;
- maxCorner = center + extents;
- }
-
- // Get box center.
- inline Vector3 Box::center() const
- {
- return (minCorner + maxCorner) * 0.5f;
- }
-
- // Return extents of the box.
- inline Vector3 Box::extents() const
- {
- return (maxCorner - minCorner) * 0.5f;
- }
-
- // Return extents of the box.
- inline float Box::extents(uint axis) const
- {
- nvDebugCheck(axis < 3);
- if (axis == 0) return (maxCorner.x - minCorner.x) * 0.5f;
- if (axis == 1) return (maxCorner.y - minCorner.y) * 0.5f;
- if (axis == 2) return (maxCorner.z - minCorner.z) * 0.5f;
- nvUnreachable();
- return 0.0f;
- }
-
- // Add a point to this box.
- inline void Box::addPointToBounds(const Vector3 & p)
- {
- minCorner = min(minCorner, p);
- maxCorner = max(maxCorner, p);
- }
-
- // Add a box to this box.
- inline void Box::addBoxToBounds(const Box & b)
- {
- minCorner = min(minCorner, b.minCorner);
- maxCorner = max(maxCorner, b.maxCorner);
- }
-
- // Add sphere to this box.
- inline void Box::addSphereToBounds(const Vector3 & p, float r) {
- minCorner = min(minCorner, p - Vector3(r));
- maxCorner = min(maxCorner, p + Vector3(r));
- }
-
- // Translate box.
- inline void Box::translate(const Vector3 & v)
- {
- minCorner += v;
- maxCorner += v;
- }
-
- // Scale the box.
- inline void Box::scale(float s)
- {
- minCorner *= s;
- maxCorner *= s;
- }
-
- // Expand the box by a fixed amount.
- inline void Box::expand(float r) {
- minCorner -= Vector3(r,r,r);
- maxCorner += Vector3(r,r,r);
- }
-
- // Get the area of the box.
- inline float Box::area() const
- {
- const Vector3 d = extents();
- return 8.0f * (d.x*d.y + d.x*d.z + d.y*d.z);
- }
-
- // Get the volume of the box.
- inline float Box::volume() const
- {
- Vector3 d = extents();
- return 8.0f * (d.x * d.y * d.z);
- }
-
- // Return true if the box contains the given point.
- inline bool Box::contains(const Vector3 & p) const
- {
- return
- minCorner.x < p.x && minCorner.y < p.y && minCorner.z < p.z &&
- maxCorner.x > p.x && maxCorner.y > p.y && maxCorner.z > p.z;
- }
-
- // Split the given box in 8 octants and assign the ith one to this box.
- inline void Box::setOctant(const Box & box, const Vector3 & center, int i)
- {
- minCorner = box.minCorner;
- maxCorner = box.maxCorner;
-
- if (i & 4) minCorner.x = center.x;
- else maxCorner.x = center.x;
- if (i & 2) minCorner.y = center.y;
- else maxCorner.y = center.y;
- if (i & 1) minCorner.z = center.z;
- else maxCorner.z = center.z;
- }
-
-} // nv namespace
-
-
-#endif // NV_MATH_BOX_INL