void MultiLineObj::ClosedSplineToPolygon (Coord* cpx, Coord* cpy, int cpcount){
register int cpi;
if (cpcount < 3) {
_x = cpx;
_y = cpy;
_count = cpcount;
} else {
mlcount = 0;
CalcSection(
cpx[cpcount - 1], cpy[cpcount - 1], cpx[0], cpy[0],
cpx[1], cpy[1], cpx[2], cpy[2]
);
for (cpi = 1; cpi < cpcount - 2; ++cpi) {
CalcSection(
cpx[cpi - 1], cpy[cpi - 1], cpx[cpi], cpy[cpi],
cpx[cpi + 1], cpy[cpi + 1], cpx[cpi + 2], cpy[cpi + 2]
);
}
CalcSection(
cpx[cpi - 1], cpy[cpi - 1], cpx[cpi], cpy[cpi],
cpx[cpi + 1], cpy[cpi + 1], cpx[0], cpy[0]
);
CalcSection(
cpx[cpi], cpy[cpi], cpx[cpi + 1], cpy[cpi + 1],
cpx[0], cpy[0], cpx[1], cpy[1]
);
_x = mlx;
_y = mly;
_count = mlcount;
}
}
void Pipe::SectionInfo(StrArray<8> &array,double dTime)
{
array.Data(GetKey(),0);
array.Data(float(Len()),1);
array.Data(float(WaveSpeed()),2);
array.Data(float(CalcSection(dTime)),3);
int nNum = 0;
double dError = 0;
double dWave = 0;
CalcSection(nNum,dError,dTime);
dWave = (Len()/nNum) / dTime;
array.Data(nNum,4);
array.Data(float(dError),5);
array.Data(float(dWave),6);
}
//--------------------------------------------
//Parameters: nNum[OUT] 管道分段数取整
// dError[OUT] 误差
// dTimeStep[IN] 理想分段时间步长
// dMaxError[IN] 允许最大误差
// return: 如果误差小于等于最大误差返回TURE
// Memo:
//
//---------------------------------------------
BOOL Pipe::CalcSection(int &nNum,double &dError,double dTimeStep,double dMaxError)
{
double dSectoin = CalcSection(dTimeStep);
if(dSectoin - int(dSectoin) >= 0.5)
{
nNum = int(dSectoin) + 1;
}
else
{
nNum = int(dSectoin);
}
dError = (nNum - dSectoin)*100 / nNum;
if(fabs(dError) <= dMaxError)
{
return TRUE;
}
else
{
return FALSE;
}
}
