box3.h

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/**********************************************************************
 *<
    FILE: box3.h

    DESCRIPTION: 3D Box class

    CREATED BY: Dan Silva

    HISTORY:

 *> Copyright (c) 1994, All Rights Reserved.
 **********************************************************************/
#pragma once

#include "GeomExport.h"
#include "maxheap.h"
#include "point3.h"
#include "matrix3.h"

class Box3: public MaxHeapOperators {
    public:
        Point3 pmin,pmax;
        GEOMEXPORT Box3();
        Box3(const Point3& p, const Point3& q) { pmin = p; pmax = q;}
        GEOMEXPORT void Init();

        GEOMEXPORT void MakeCube(const Point3& p, float side);

        // Access
        Point3 Min() const { return pmin; }
        Point3 Max() const { return pmax; }
        Point3 Center() const { return(pmin+pmax)/(float)2.0; }
        Point3 Width() const { return(pmax-pmin); }

        /* operator[] returns ith corner point: (i == (0..7) )
            Mapping:
                    X   Y   Z
            [0] : (min,min,min)
            [1] : (max,min,min)
            [2] : (min,max,min)
            [3] : (max,max,min)
            [4] : (min,min,max)
            [5] : (max,min,max)
            [6] : (min,max,max)
            [7] : (max,max,max)
            */
        GEOMEXPORT Point3 operator[](int i) const;    

        // Modifiers
        GEOMEXPORT Box3& operator+=(const Point3& p);   // expand this box to include Point3
        GEOMEXPORT Box3& operator+=(const Box3& b);   // expand this box to include  Box3

        GEOMEXPORT void Scale(float s); // scale box about center
        GEOMEXPORT void Translate(const Point3 &p); // translate box
        GEOMEXPORT void EnlargeBy(float s); // enlarge by this amount on all sides

        // include an array of points, optionally transformed by tm
        GEOMEXPORT void IncludePoints(Point3 *pts, int numpoints, Matrix3 *tm=NULL); 

        // Returns a box that bounds the 8 transformed corners of the input box.
        GEOMEXPORT Box3 operator*(const Matrix3& tm) const;

        // Tests
        GEOMEXPORT int IsEmpty() const;   // is this box empty?
        GEOMEXPORT int Contains(const Point3& p) const;  // is point in this box?
        GEOMEXPORT int Contains(const Box3& b) const;  // is box b totally in this box?
        GEOMEXPORT int Intersects(const Box3& b) const;  // does  box b intersect this box at all?
        
        

    };