objectarx之工具

.h文件：

//与点与直线的位置关系： >0在右侧；=0在线上；<0在左侧
static float relationshipWithLinePosition(AcGePoint3d&pt, AcGePoint3d& linept1, AcGePoint3d& linept2);
static float relationshipWithLinePosition(AcGePoint3d&pt,AcDbObjectId& lineid);
//判断两条直线是否垂直,pt1和pt2为一条边，pt3和pt4为一条边,pt1和pt4为斜边，其中pt2和pt3是公共点
static bool isVerticalBothLines(AcGePoint3d& pt1, AcGePoint3d& pt2, AcGePoint3d& pt3, AcGePoint3d& pt4, double tol);
static bool isVerticalBothLines(AcDbObjectId& Line1, AcDbObjectId& Line2, double tol);
//角度、弧度互转
//角度转弧度
static double angularRadian(double angle);
//弧度转角度
static double radianAngle(double radian);

float CCommonFuntion::relationshipWithLinePosition(AcGePoint3d& pt, AcGePoint3d& linept1, AcGePoint3d& linept2)
{
AcGePoint3d point1, point2;

point1.x = linept1.x - linept2.x;
point1.y = linept1.y - linept2.y;

point2.x = pt.x - linept1.x;
point2.y = pt.y - linept1.y;

float sum = point1.x*point2.y - point2.x*point1.y;
return sum;
}

float CCommonFuntion::relationshipWithLinePosition(AcGePoint3d&pt, AcDbObjectId& lineid)
{
AcDbEntity *pEnt = NULL;
if (acdbOpenObject(pEnt, lineid, AcDb::kForRead) != eOk)
return 0;

AcDbLine *pLine = AcDbLine::cast(pEnt);
AcGePoint3d startpt = pLine->startPoint();
AcGePoint3d endpt = pLine->endPoint();
delete pLine;

return relationshipWithLinePosition(pt, startpt, endpt);
}

bool CCommonFuntion::isVerticalBothLines(AcGePoint3d& pt1, AcGePoint3d& pt2, AcGePoint3d& pt3, AcGePoint3d& pt4, double tol)
{
double dis_1 = pt1.distanceTo(pt2);
double dis_2 = pt3.distanceTo(pt4);
double dis = pt1.distanceTo(pt4);

if (abs(pow(dis_1, 2) + pow(dis_2, 2) - pow(dis, 2)) <= tol)
return true;
return false;

}

bool CCommonFuntion::isVerticalBothLines(AcDbObjectId& Line1, AcDbObjectId& Line2, double tol)
{
AcDbEntity *pEnt_1 = NULL;
if (acdbOpenObject(pEnt_1, Line1, AcDb::kForRead) != eOk)
return false;
AcDbLine *pLine_1 = AcDbLine::cast(pEnt_1);
AcGePoint3d startpt_1 = pLine_1->startPoint();
AcGePoint3d endpt_1 = pLine_1->endPoint();
delete pLine_1;
pEnt_1->close();

AcDbEntity *pEnt_2 = NULL;
if (acdbOpenObject(pEnt_2, Line2, AcDb::kForRead) != eOk)
return false;
AcDbLine *pLine_2 = AcDbLine::cast(pEnt_2);
AcGePoint3d startpt_2 = pLine_2->startPoint();
AcGePoint3d endpt_2 = pLine_2->endPoint();
delete pLine_2;
pEnt_2->close();

AcGePoint3d pt1, pt2, pt3, pt4;
if (startpt_1.distanceTo(startpt_2) <= 1)
{
pt1 = endpt_1;
pt2 = startpt_1;
pt3 = startpt_2;
pt4 = endpt_2;
}
else if(startpt_1.distanceTo(endpt_2)<= 1)
{
pt1 = endpt_1;
pt2 = startpt_1;
pt3 = endpt_2;
pt4 = startpt_2;
}

return isVerticalBothLines(pt1, pt2, pt3, pt4, tol);

}

double CCommonFuntion::angularRadian(double angle)
{
double pi = 3.1415926535898;
return angle*(pi / 180);
}

double CCommonFuntion::radianAngle(double radian)
{
double pi = 3.1415926535898;
return radian * (180 / pi);
}