需求描述:需要实现在三维场景中添加广告牌显示的功能,用于实现图片的显示。
解决思路:准备采用超图底层的广告牌UGGeoBillboard来实现,已经在Extensions4Qt工程下的layer3d.cpp中写了一个AddPicture的接口,也在GettingStarted的mainwindow.cpp中的CreateModel中调用了。
当前状态:广告牌对象创建返回false。
Feature3D *Layer3D::AddPicture(QString &pictureFile,OgdcPoint3D &position,QString &strID)
{
//!新建图片对象
UGGeoPicture* pPicture = new UGGeoPicture();
QImage* pImage = new QImage(pictureFile);
UGImageData* pImageData = new UGImageData();
pImageData->nHeight = pImage->height();
pImageData->nWidth = pImage->width();
pImageData->nWidthBytes = pImage->bytesPerLine();
pImageData->btBitsPixel = 32;
pImageData->pBits = new UGbyte[pImage->byteCount()];
memcpy(pImageData->pBits,pImage->bits(),pImage->byteCount());
UGArray<UGImageData*> arrImageData;
arrImageData.Add(pImageData);
UGPoint2D pntCenter(position.x,position.y);
//返回true
bool bIsOk = pPicture->Make(arrImageData,pntCenter,UGSize2D(pImage->width(),pImage->height()));
//! 新建布告板对象
UGGeoBillboard *pUGGeoBillboard = new UGGeoBillboard();
//返回false
bIsOk=pUGGeoBillboard->MakeWithGeometry(pPicture);
pUGGeoBillboard->SetHeight(72);
pUGGeoBillboard->SetWidth(48);
if(bIsOk)
{
pUGGeoBillboard->SetPosition(position);
return this->AddFeature(pUGGeoBillboard,strID);
}
else
return NULL;
}