按表走呵呵!(延时死循环)

最新推荐文章于 2022-01-25 21:04:57 发布

weixin_30751947

最新推荐文章于 2022-01-25 21:04:57 发布

阅读量105

点赞数

CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/NewAutoMan/p/6398407.html

本文展示了一个使用C++编写的模拟时钟程序，该程序通过不断更新时针、分针和秒针的位置来模拟真实时钟的行为。利用AcDbDatabase获取对象ID，并通过AcGeMatrix3d进行旋转操作实现。

static void zffObjectARX_MyCommand6(void)
{

AcDbObjectId secondId;
AcDbObjectId minutId;
AcDbObjectId HourId;
AcDbEntity* pSecond=NULL;
AcDbEntity* pMinute=NULL;
AcDbEntity* pHour=NULL;
AcDbHandle haSecond(_T("209"));
AcDbHandle haMinut(_T("1FC"));
AcDbHandle haHour(_T("1FB"));
AcDbDatabase* pDb=acdbHostApplicationServices()->workingDatabase();
pDb->getAcDbObjectId(secondId,false,haSecond);
pDb->getAcDbObjectId(minutId,false,haMinut);
pDb->getAcDbObjectId(HourId,false,haHour);

double ang=pi()/30;
AcGeMatrix3d rotate,minut,hour;
rotate.setToRotation(-ang,AcGeVector3d::kZAxis,AcGePoint3d(100,100,0));
minut.setToRotation(-ang/60,AcGeVector3d::kZAxis,AcGePoint3d(100,100,0));
hour.setToRotation(-ang/720,AcGeVector3d::kZAxis,AcGePoint3d(100,100,0));
while (1)
{
clock_t start=clock();
clock_t time=CLOCKS_PER_SEC;
while (clock()-start<time)
;
acdbOpenObject(pSecond,secondId,AcDb::kForWrite);
acdbOpenObject(pMinute,minutId,AcDb::kForWrite);
acdbOpenObject(pHour,HourId,AcDb::kForWrite);
pSecond->transformBy(rotate);
pMinute->transformBy(minut);
pHour->transformBy(hour);
pSecond->close();
pMinute->close();
pHour->close();
pSecond=NULL;
pMinute=NULL;
pHour=NULL;
actrTransactionManager->queueForGraphicsFlush();
actrTransactionManager->flushGraphics();
acedUpdateDisplay();
}
}