Graph.cpp

Go to the documentation of this file.

 
#include "Graph.h"
 
 
using namespace jbxl;
 
 
void  jbxl::rotate_point(int& x, int& y, double sxc, double syc, double dxc, double dyc, double cst, double snt)
{
    double a, b, u, t;
 
    a = x - sxc;
    b = syc - y;
    u = a*cst - b*snt;
    t = a*snt + b*cst;
    x = (int)(u + dxc + 0.5);
    y = (int)(dyc - t + 0.5);
 
    return;
}
 
 
void  jbxl::rotate_point_angle(int& x, int& y, double sxc, double syc, double dxc, double dyc, double th)
{
    double cst = (double)cos(th);
    double snt = (double)sin(th);
 
    rotate_point(x, y, sxc, syc, dxc, dyc, cst, snt);
 
    return;
}