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feat (wip): moved image to center on 0,0

This commit is contained in:
Djairo Hougee 2024-05-05 22:39:45 +02:00
parent f40c8ef2f7
commit 3a4c0c295d
1 changed files with 47 additions and 9 deletions
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54
vtk/src/layers/BackgroundImage.cpp
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@ -1,8 +1,11 @@
#include "BackgroundImage.h"
#include <vtkImageChangeInformation.h>
#include <vtkCamera.h>
#include <vtkImageActor.h>
#include <vtkImageData.h>
#include <vtkImageReader2.h>
#include <vtkMatrix4x4.h>
#include <vtkTransform.h>
#include <vtkTransformFilter.h>
using std::string;
@ -14,24 +17,51 @@ BackgroundImage::BackgroundImage(string imagePath) : imagePath(imagePath) {
updateImage();
}
// vtkSmartPointer<vtkMatrix4x4> getMatrix(const int w, const int h) {
// const double XMin = 0;
// const double XMax = w;
// const double YMin = 0;
// const double YMax = h;
//
// double eyeTransform[] = {
// 2/(XMax-XMin), 0, 0, -(XMax+XMin)/(XMax-XMin),
// 0, 2/(YMax-YMin), 0, -(YMax+YMin)/(YMax-YMin),
// 0, 0, 1, 0,
// 0, 0, 0, 1
// };
//
// auto matrix = vtkSmartPointer<vtkMatrix4x4>::New();
// matrix->DeepCopy(eyeTransform);
// return matrix;
// }
void BackgroundImage::updateImage() {
vtkSmartPointer<vtkImageData> imageData;
vtkSmartPointer<vtkImageReader2> imageReader;
imageReader.TakeReference(this->readerFactory->CreateImageReader2(this->imagePath.c_str()));
imageReader->SetFileName(this->imagePath.c_str());
imageReader->Update();
imageData = imageReader->GetOutput();
// TODO: transform the iamge to the range [-1,1] and center it on (0,0)/
// TODO: transform the iamge to the range [-1,1] and center it on (0,0)
// This will allow the backgorundImage to share a camera with our other layers.
// Facilitating the cameraMovement callback.
vtkNew<vtkImageChangeInformation> changeInformation;
changeInformation->SetInputConnection(imageReader->GetOutputPort());
changeInformation->CenterImageOn();
changeInformation->Update();
// vtkSmartPointer<vtkTransformFilter> transformFilter = createCartographicTransformFilter();
vtkSmartPointer<vtkImageData> imageData = changeInformation->GetOutput();
// vtkNew<vtkTransform> transform;
//
// transform->SetMatrix(getMatrix(661, 661));
//
// vtkSmartPointer<vtkTransformFilter> transformFilter = vtkSmartPointer<vtkTransformFilter>::New();
// transformFilter->SetTransform(transform);
// transformFilter->SetInputData(imageData);
vtkNew<vtkImageActor> imageActor;
imageActor->SetInputData(imageData);
@ -47,16 +77,23 @@ void BackgroundImage::updateImage() {
imageData->GetSpacing(spacing);
imageData->GetExtent(extent);
// printf("%lf, %lf, %lf\n", origin[0], origin[1], origin[2]);
// printf("%lf, %lf, %lf\n", spacing[0], spacing[1], spacing[2]);
// printf("%d, %d, %d, ", extent[0], extent[1], extent[2]);
// printf("%d, %d, %d\n", extent[3], extent[4], extent[5]);
vtkCamera *camera = this->ren->GetActiveCamera();
camera->ParallelProjectionOn();
double xc = origin[0] + 0.5 * (extent[0] + extent[1]) * spacing[0];
double yc = origin[1] + 0.5 * (extent[2] + extent[3]) * spacing[1];
double yd = (extent[3] - extent[2] + 1) * spacing[1];
double d = camera->GetDistance();
camera->SetParallelScale(0.5 * yd);
camera->SetFocalPoint(xc, yc, 0.0);
camera->SetPosition(xc, yc, d);
// printf("%lf, %lf, %lf\n", xc, yc, yd);
camera->SetParallelScale(0.5 * yd); // sets to 330; should be 1 -> resize image.
camera->SetFocalPoint(xc, yc, 0.0); // sets to 0,0,0; isnice
camera->SetPosition(xc, yc, 1000); // sets to 0,0,1000; isnice
}
@ -71,5 +108,6 @@ void BackgroundImage::setImagePath(string imagePath) {
void BackgroundImage::setCamera(vtkCamera *cam) {
this->getLayer()->SetActiveCamera(cam);
// TODO: fix the camera for this layer so this intentionally empty override can be removed.
}