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#include <iostream>
#include <cmath>
struct Point3D
{
float x,y,z;
Point3D () {}
Point3D (float x, float y, float z) : x(x), y(y), z(z) {}
Point3D& operator -= (const Point3D& p) { x-=p.x; y-=p.y; z-=p.z; return *this; }
Point3D operator - (const Point3D& p) const { Point3D p2(*this); return (p2-=p); }
Point3D& operator *= (const float f) { x*=f; y*=f; z*=f; return *this; }
Point3D operator * (const float f) const { Point3D p2(*this); return (p2*=f); }
};
float Dot (const Point3D& p1, const Point3D& p2) { return p1.x*p2.x + p1.y*p2.y + p1.z*p2.z; }
struct Face
{
Point3D n;
float nc;
float Dist (const Point3D& p) const { return Dot(p,n)-nc; }
};
int show_float(float src)
{
union
{
int i;
float f;
} u;
u.f = src;
return u.i;
}
float from_int(int src)
{
union
{
int i;
float f;
} u;
u.i = src;
return u.f;
}
template<typename T>
T& operator<<(T& str, const Point3D& p)
{
str << std::hex << "Point3D(from_int(0x" << show_float(p.x) << "), from_int(0x" << show_float(p.y) << "), from_int(0x" << show_float(p.z) << "))";
return str;
}
struct SPoint
{
Point3D p;
bool DoCorrectFace(const Face& face)
{
bool correct = true;
float j=1.0f;
Point3D np=p;
for (;;)
{
float ad = face.Dist(np);
if (ad<=0.0f)
break;
correct=false;
np = p - (face.n*(ad*j));
j += 1.0f;
}
p=np;
return correct;
}
};
using namespace std;
int main()
{
cout << "Hello World!" << endl;
SPoint spoint;
spoint.p = Point3D(from_int(0x41c6940e), from_int(0x427352a6), from_int(0xc166e2d0));
cout << "Initial p:" << endl;
cout << spoint.p << endl;
cout << "Corrected:" << endl;
Face f;
f.n = Point3D(from_int(0x3d6cc83b), from_int(0x3f0e8841), from_int(0x3f5422bd));
f.nc = from_int(0x41bac3dc);
bool result = spoint.DoCorrectFace(f);
cout << spoint.p << endl;
cout << "Done: " << result << endl;
return 0;
}
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