2017全年第一篇 --- 求圆弧坐标

已知圆心(x0,y0),半径radius = 1000米，求出每隔1度一个的圆边上的坐标。

constdouble _LONG_DISTANCE= 39940.67;//地球子午线长，单位：km

constdouble _LATI_DISTANCE= 40075.36;//赤道长，单位：km

void test(){

doublex0 = 116.202038,y0 = 39.937639;

doubleradius = 1000;

doubleangleSpan = 1;

for(intangle = 0; angle < 360; angle += angleSpan) {

doubletempAngle = angle*PI/180;

doublexi = x0 + radius *cos(tempAngle) * 360 /_LONG_DISTANCE/ 1000;

doubleyi = y0 + radius *sin(tempAngle) * 360 /_LATI_DISTANCE/ 1000;

printf("%d,%f,%f\r\n",angle,xi,yi);

}

}