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128 lines
3.5 KiB
C
128 lines
3.5 KiB
C
3 weeks ago
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/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkLightActor.h
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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/**
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* @class vtkLightActor
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* @brief a cone and a frustum to represent a spotlight.
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*
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* vtkLightActor is a composite actor used to represent a spotlight. The cone
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* angle is equal to the spotlight angle, the cone apex is at the position of
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* the light, the direction of the light goes from the cone apex to the center
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* of the base of the cone. The square frustum position is the light position,
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* the frustum focal point is in the direction of the light direction. The
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* frustum vertical view angle (aperture) (this is also the horizontal view
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* angle as the frustum is square) is equal to twice the cone angle. The
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* clipping range of the frustum is arbitrary set by the user
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* (initially at 0.5,11.0).
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*
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* @warning
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* Right now only spotlight are supported but directional light might be
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* supported in the future.
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*
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* @sa
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* vtkLight vtkConeSource vtkFrustumSource vtkCameraActor
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*/
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#ifndef vtkLightActor_h
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#define vtkLightActor_h
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#include "vtkProp3D.h"
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#include "vtkRenderingCoreModule.h" // For export macro
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class vtkLight;
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class vtkConeSource;
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class vtkPolyDataMapper;
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class vtkActor;
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class vtkCamera;
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class vtkCameraActor;
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class vtkBoundingBox;
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class VTKRENDERINGCORE_EXPORT vtkLightActor : public vtkProp3D
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{
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public:
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static vtkLightActor* New();
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vtkTypeMacro(vtkLightActor, vtkProp3D);
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void PrintSelf(ostream& os, vtkIndent indent) override;
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//@{
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/**
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* The spotlight to represent. Initial value is NULL.
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*/
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void SetLight(vtkLight* light);
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vtkGetObjectMacro(Light, vtkLight);
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//@}
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//@{
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/**
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* Set/Get the location of the near and far clipping planes along the
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* direction of projection. Both of these values must be positive.
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* Initial values are (0.5,11.0)
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*/
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void SetClippingRange(double dNear, double dFar);
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void SetClippingRange(const double a[2]);
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vtkGetVector2Macro(ClippingRange, double);
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//@}
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/**
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* Support the standard render methods.
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*/
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int RenderOpaqueGeometry(vtkViewport* viewport) override;
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/**
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* Does this prop have some translucent polygonal geometry? No.
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*/
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vtkTypeBool HasTranslucentPolygonalGeometry() override;
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/**
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* Release any graphics resources that are being consumed by this actor.
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* The parameter window could be used to determine which graphic
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* resources to release.
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*/
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void ReleaseGraphicsResources(vtkWindow*) override;
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/**
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* Get the bounds for this Actor as (Xmin,Xmax,Ymin,Ymax,Zmin,Zmax).
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*/
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double* GetBounds() override;
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/**
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* Get the actors mtime plus consider its properties and texture if set.
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*/
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vtkMTimeType GetMTime() override;
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protected:
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vtkLightActor();
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~vtkLightActor() override;
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void UpdateViewProps();
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vtkLight* Light;
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double ClippingRange[2];
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vtkConeSource* ConeSource;
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vtkPolyDataMapper* ConeMapper;
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vtkActor* ConeActor;
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vtkCamera* CameraLight;
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vtkCameraActor* FrustumActor;
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vtkBoundingBox* BoundingBox;
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private:
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vtkLightActor(const vtkLightActor&) = delete;
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void operator=(const vtkLightActor&) = delete;
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};
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#endif
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