VTK Learning Fifteen - 3D Text

VTK Learning Fifteen - 3D Text

Description

線性擠壓vtkLinearExtrusionFilter。

Code

#include <vtkSmartPointer.h>
#include <vtkVectorText.h>
#include <vtkLinearExtrusionFilter.h>
#include <vtkTriangleFilter.h>

#include <vtkDataSetMapper.h>
#include <vtkActor.h>
#include <vtkProperty.h>
#include <vtkCamera.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>

int main(int, char *[])
{
	// Create vector text polydata
	vtkSmartPointer<vtkVectorText> vecText =
		vtkSmartPointer<vtkVectorText>::New();
	vecText->SetText("Welcome to my blog!");

	// Apply linear extrusion 
	vtkSmartPointer<vtkLinearExtrusionFilter> extrude =
		vtkSmartPointer<vtkLinearExtrusionFilter>::New();
	extrude->SetInputConnection(vecText->GetOutputPort());
	extrude->SetExtrusionTypeToNormalExtrusion();
	extrude->SetVector(0, 0, 1);// 沿文字方向擠壓
	extrude->SetScaleFactor(0.5);// 設置擠壓比例

	//三角化
	vtkSmartPointer<vtkTriangleFilter> triangleFilter =
		vtkSmartPointer<vtkTriangleFilter>::New();
	triangleFilter->SetInputConnection(extrude->GetOutputPort());

	vtkSmartPointer<vtkDataSetMapper> mapper =
		vtkSmartPointer<vtkDataSetMapper>::New();
	mapper->SetInputConnection(triangleFilter->GetOutputPort());

	vtkSmartPointer<vtkActor> actor =
		vtkSmartPointer<vtkActor>::New();
	actor->SetMapper(mapper);
	actor->GetProperty()->SetColor(0.8900, 0.8100, 0.3400);

	vtkSmartPointer<vtkRenderWindow> renderWindow =
		vtkSmartPointer<vtkRenderWindow>::New();

	vtkSmartPointer<vtkRenderer> renderer =
		vtkSmartPointer<vtkRenderer>::New();
	renderer->SetBackground(.4, .5, .7);

	renderWindow->AddRenderer(renderer);

	renderer->AddActor(actor);

	renderer->ResetCamera();
	// Generate an interesting view
	renderer->ResetCamera();
	renderer->GetActiveCamera()->Azimuth(30);
	renderer->GetActiveCamera()->Elevation(30);
	renderer->GetActiveCamera()->Dolly(1.0);
	renderer->ResetCameraClippingRange();

	vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
		vtkSmartPointer<vtkRenderWindowInteractor>::New();
	renderWindowInteractor->SetRenderWindow(renderWindow);
	renderWindow->Render();
	renderWindowInteractor->Start();

	return EXIT_SUCCESS;
}

Result