当我选择vtkActor
时,我希望能够访问我的底层数据结构。从vtkActor
派生的类对我的数据结构具有ptr,这似乎是最简单的方法。
我得到了可以很好地编译的子类,但是actor似乎没有添加到渲染器中。
所以,这是我的课:
//.h
#include <vtkActor.h>
#include <vtkObjectFactory.h>
class Node;
struct Actor : public vtkActor {
static Actor* New();
vtkTypeMacro(Actor, vtkActor)
Node* holding_node;
};
//.cpp
#include "actor.h"
vtkStandardNewMacro(Actor)
在我的渲染步骤中:如果我使用
vtkActor
实例化actor,那么一切都会按预期显示,进行拾取等。vtkSmartPointer<vtkActor> sphereActor = vtkSmartPointer<vtkActor>::New();
但是如果我使用
Actor
类,则不会添加任何actorvtkSmartPointer<Actor> sphereActor = vtkSmartPointer<Actor>::New();
代码中没有其他更改。有什么问题的想法吗?
最佳答案
因此,事实证明,有许多功能需要重载,并且需要执行一些宏魔术操作才能使其正常工作。
我将下面的示例粘贴到现在为我工作的示例中。它主要来自vtkFollower代码(来自vtkActor的派生类)。希望这可以帮助!
#include <vtkSmartPointer.h>
#include <vtkRenderer.h>
#include <vtkObjectFactory.h>
#include <vtkRenderingCoreModule.h>
#include <vtkProperty.h>
class Node;
class VTKRENDERINGCORE_EXPORT NodeActor : public vtkActor {
public:
vtkTypeMacro(NodeActor, vtkActor);
static NodeActor *New();
virtual void ReleaseGraphicsResources(vtkWindow *window) {
this->Device->ReleaseGraphicsResources(window);
this->Superclass::ReleaseGraphicsResources(window);
}
virtual int RenderOpaqueGeometry(vtkViewport *viewport){
if ( ! this->Mapper ) {
return 0;
}
if (!this->Property) {
this->GetProperty();
}
if (this->GetIsOpaque()) {
vtkRenderer *ren = static_cast<vtkRenderer *>(viewport);
this->Render(ren);
return 1;
}
return 0;
}
virtual int RenderTranslucentPolygonalGeometry(vtkViewport *viewport){
if ( ! this->Mapper ) {
return 0;
}
if (!this->Property) {
this->GetProperty();
}
if (!this->GetIsOpaque()) {
vtkRenderer *ren = static_cast<vtkRenderer *>(viewport);
this->Render(ren);
return 1;
}
return 0;
}
virtual void Render(vtkRenderer *ren){
this->Property->Render(this, ren);
this->Device->SetProperty (this->Property);
this->Property->Render(this, ren);
if (this->BackfaceProperty) {
this->BackfaceProperty->BackfaceRender(this, ren);
this->Device->SetBackfaceProperty(this->BackfaceProperty);
}
if (this->Texture) {
this->Texture->Render(ren);
}
this->ComputeMatrix();
this->Device->SetUserMatrix(this->Matrix);
this->Device->Render(ren,this->Mapper);
}
void ShallowCopy(vtkProp *prop) {
NodeActor *f = NodeActor::SafeDownCast(prop);
this->vtkActor::ShallowCopy(prop);
}
//****************************************//
// my member
//****************************************//
Node* node_i_represent{nullptr};
protected:
vtkActor* Device;
NodeActor() {
this -> Device = vtkActor::New();
}
~NodeActor() {
this -> Device -> Delete();
}
private:
};
vtkStandardNewMacro(NodeActor)