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/*****
* bbox3.h
* Andy Hammerlindl 2002/06/06
*
* Stores a rectangle that encloses a drawing object.
*****/
#ifndef BBOX3_H
#define BBOX3_H
#include "triple.h"
namespace camp {
// The box that encloses a path
struct bbox3 {
bool empty;
double left;
double bottom;
double lower;
double right;
double top;
double upper;
// Start bbox3 about the origin
bbox3()
: empty(true), left(0.0), bottom(0.0), lower(0.0),
right(0.0), top(0.0), upper(0.0)
{
}
bbox3(double left, double bottom, double lower,
double right, double top, double upper)
: empty(false), left(left), bottom(bottom), lower(lower),
right(right), top(top), upper(upper)
{
}
// Start a bbox3 with a point
bbox3(double x, double y, double z)
: empty(false), left(x), bottom(y), lower(z), right(x), top(y), upper(z)
{
}
// Start a bbox3 with a point
bbox3(const triple& v)
: empty(false), left(v.getx()), bottom(v.gety()), lower(v.getz()),
right(v.getx()), top(v.gety()), upper(v.getz())
{
}
// Start a bbox3 with 2 points
bbox3(const triple& m, const triple& M)
: empty(false),
left(m.getx()), bottom(m.gety()), lower(m.getz()),
right(M.getx()), top(M.gety()), upper(M.getz())
{
}
// Add a point to a bbox3
void add(const triple& v)
{
const double x = v.getx(), y = v.gety(), z = v.getz();
add(x,y,z);
}
void add(double x, double y, double z)
{
if (empty) {
left = right = x;
top = bottom = y;
lower = upper = z;
empty = false;
}
else {
if(x < left)
left = x;
else if(x > right)
right = x;
if(y < bottom)
bottom = y;
else if(y > top)
top = y;
if(z < lower)
lower = z;
else if(z > upper)
upper = z;
}
}
// Add a point to a nonempty bbox3
void addnonempty(double x, double y, double z)
{
if(x < left)
left = x;
else if(x > right)
right = x;
if(y < bottom)
bottom = y;
else if(y > top)
top = y;
if(z < lower)
lower = z;
else if(z > upper)
upper = z;
}
// Add a point to a nonempty bbox3
void addnonempty(const triple& v)
{
addnonempty(v.getx(),v.gety(),v.getz());
}
// Add a point to a nonempty bbox, updating bounding times
void addnonempty(const triple& v, bbox3& times, double t)
{
double x = v.getx(), y = v.gety(), z = v.getz();
if(x < left) {
left = x;
times.left = t;
}
else if(x > right) {
right = x;
times.right = t;
}
if(y < bottom) {
bottom = y;
times.bottom = t;
}
else if(y > top) {
top = y;
times.top = t;
}
if(z < lower) {
lower = z;
times.lower=t;
}
else if(z > upper) {
upper = z;
times.upper=t;
}
}
bbox3 operator+= (const triple& v)
{
add(v);
return *this;
}
triple Min() const {
return triple(left,bottom,lower);
}
triple Max() const {
return triple(right,top,upper);
}
// transform bbox3 by 4x4 column-major matrix
void transform(const double* m)
{
const double xmin = left;
const double ymin = bottom;
const double zmin = lower;
const double xmax = right;
const double ymax = top;
const double zmax = upper;
empty = true;
add(m*triple(xmin,ymin,zmin));
addnonempty(m*triple(xmin,ymin,zmax));
addnonempty(m*triple(xmin,ymax,zmin));
addnonempty(m*triple(xmin,ymax,zmax));
addnonempty(m*triple(xmax,ymin,zmin));
addnonempty(m*triple(xmax,ymin,zmax));
addnonempty(m*triple(xmax,ymax,zmin));
addnonempty(m*triple(xmax,ymax,zmax));
}
friend ostream& operator << (ostream& out, const bbox3& b)
{
out << "Min " << b.Min() << " Max " << b.Max();
return out;
}
};
} // namespace camp
GC_DECLARE_PTRFREE(camp::bbox3);
#endif
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