我正在使用 PCL 查看器(使用 VTK)来可视化由 SLAM 算法生成的 3D 点云。我正在尝试渲染机器人在给定姿势(位置和方向)下看到的点云视图。我可以设置相机的位置和 ViewUp 矢量,但我无法将相机的焦点设置为机器人的航向。目前,我正在使用滑块来设置焦点,但我想根据标题以编程方式设置它。
我正在尝试了解 VTKCamera Focal Point 期望的类型(以 rad 为单位的角度/以 m 为单位的距离)和值范围以及它与航向的关系。
我正在更新相机的功能
void Widget::setcamView(){
//transfrom position
Eigen::Vector3d position = this->transformpose(Eigen::Vector3d(image_pose.at(pose_ittr).position[0], image_pose.at(pose_ittr).position[1], image_pose.at(pose_ittr).position[2]));
posx = position(0);
posy = position(1);
posz = position(2);
//transform the pose
Eigen::Vector3d attitude = this->transformpose(Eigen::Vector3d(image_pose.at(pose_ittr).orientation[0],image_pose.at(pose_ittr).orientation[1],image_pose.at(pose_ittr).orientation[2]));
roll = attitude(0);
pitch = attitude(1);
yaw = attitude(2);
viewx = ui->viewxhSlider->value();// * std::pow(10,-3);
viewy = ui->viewyhSlider->value();// * std::pow(10,-3);
viewz = ui->viewzhSlider->value();// * std::pow(10,-3);
// debug
std::cout<<"Positon: "<<posx<<"\t"<<posy<<"\t"<<posz<<std::endl<<
"View: "<<viewx<<"\t"<<viewy<<"\t"<<viewz<<std::endl<<
"Orientation: "<<roll<<"\t"<<pitch<<"\t"<<yaw<<std::endl;
point_cutoffy = ui->ptcutoffhSlider->value();
if(yaw <=0)
yaw = yaw * -1;
viewer->setCameraPosition(posx,posy,posz+1,
viewz,viewy,viewz,
0, 0, 1, 0);
viewer->setCameraFieldOfView(1);
viewer->setCameraClipDistances(point_cutoffx,point_cutoffy,0);
ui->qvtkWidget->update();
count++;
}
任何帮助是极大的赞赏。
-谢谢
附言
PCL Viewer Set Camera Implementation(使用VTK)
void pcl::visualization::PCLVisualizer::setCameraPosition (
double pos_x, double pos_y, double pos_z,
double view_x, double view_y, double view_z,
double up_x, double up_y, double up_z,
int viewport)
{
rens_->InitTraversal ();
vtkRenderer* renderer = NULL;
int i = 0;
while ((renderer = rens_->GetNextItem ()) != NULL)
{
// Modify all renderer's cameras
if (viewport == 0 || viewport == i)
{
vtkSmartPointer<vtkCamera> cam = renderer->GetActiveCamera ();
cam->SetPosition (pos_x, pos_y, pos_z);
cam->SetFocalPoint (view_x, view_y, view_z);
cam->SetViewUp (up_x, up_y, up_z);
renderer->ResetCameraClippingRange ();
}
++i;
}
win_->Render ();
}