7f9b54a31a
Found via `codespell -q 3`
576 lines
18 KiB
C++
576 lines
18 KiB
C++
//============================================================================
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// Copyright (c) Kitware, Inc.
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// All rights reserved.
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// See LICENSE.txt 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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// Copyright 2015 National Technology & Engineering Solutions of Sandia, LLC (NTESS).
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// Copyright 2015 UT-Battelle, LLC.
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// Copyright 2015 Los Alamos National Security.
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//
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// Under the terms of Contract DE-NA0003525 with NTESS,
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// the U.S. Government retains certain rights in this software.
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//
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// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
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// Laboratory (LANL), the U.S. Government retains certain rights in
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// this software.
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//============================================================================
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#ifndef vtk_m_rendering_Camera_h
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#define vtk_m_rendering_Camera_h
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#include <vtkm/rendering/vtkm_rendering_export.h>
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#include <vtkm/Bounds.h>
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#include <vtkm/Math.h>
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#include <vtkm/Matrix.h>
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#include <vtkm/Range.h>
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#include <vtkm/Transform3D.h>
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#include <vtkm/VectorAnalysis.h>
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#include <vtkm/rendering/MatrixHelpers.h>
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namespace vtkm
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{
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namespace rendering
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{
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class VTKM_RENDERING_EXPORT Camera
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{
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struct Camera3DStruct
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{
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public:
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VTKM_CONT
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Camera3DStruct()
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: LookAt(0.0f, 0.0f, 0.0f)
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, Position(0.0f, 0.0f, 1.0f)
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, ViewUp(0.0f, 1.0f, 0.0f)
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, FieldOfView(60.0f)
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, XPan(0.0f)
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, YPan(0.0f)
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, Zoom(1.0f)
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{
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}
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vtkm::Matrix<vtkm::Float32, 4, 4> CreateViewMatrix() const;
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vtkm::Matrix<vtkm::Float32, 4, 4> CreateProjectionMatrix(vtkm::Id width,
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vtkm::Id height,
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vtkm::Float32 nearPlane,
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vtkm::Float32 farPlane) const;
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vtkm::Vec<vtkm::Float32, 3> LookAt;
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vtkm::Vec<vtkm::Float32, 3> Position;
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vtkm::Vec<vtkm::Float32, 3> ViewUp;
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vtkm::Float32 FieldOfView;
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vtkm::Float32 XPan;
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vtkm::Float32 YPan;
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vtkm::Float32 Zoom;
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};
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struct VTKM_RENDERING_EXPORT Camera2DStruct
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{
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public:
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VTKM_CONT
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Camera2DStruct()
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: Left(-1.0f)
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, Right(1.0f)
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, Bottom(-1.0f)
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, Top(1.0f)
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, XScale(1.0f)
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, XPan(0.0f)
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, YPan(0.0f)
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, Zoom(1.0f)
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{
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}
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vtkm::Matrix<vtkm::Float32, 4, 4> CreateViewMatrix() const;
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vtkm::Matrix<vtkm::Float32, 4, 4> CreateProjectionMatrix(vtkm::Float32 size,
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vtkm::Float32 znear,
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vtkm::Float32 zfar,
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vtkm::Float32 aspect) const;
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vtkm::Float32 Left;
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vtkm::Float32 Right;
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vtkm::Float32 Bottom;
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vtkm::Float32 Top;
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vtkm::Float32 XScale;
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vtkm::Float32 XPan;
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vtkm::Float32 YPan;
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vtkm::Float32 Zoom;
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};
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public:
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enum ModeEnum
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{
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MODE_2D,
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MODE_3D
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};
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VTKM_CONT
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Camera(ModeEnum vtype = Camera::MODE_3D)
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: Mode(vtype)
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, NearPlane(0.01f)
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, FarPlane(1000.0f)
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, ViewportLeft(-1.0f)
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, ViewportRight(1.0f)
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, ViewportBottom(-1.0f)
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, ViewportTop(1.0f)
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{
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}
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vtkm::Matrix<vtkm::Float32, 4, 4> CreateViewMatrix() const;
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vtkm::Matrix<vtkm::Float32, 4, 4> CreateProjectionMatrix(vtkm::Id screenWidth,
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vtkm::Id screenHeight) const;
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void GetRealViewport(vtkm::Id screenWidth,
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vtkm::Id screenHeight,
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vtkm::Float32& left,
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vtkm::Float32& right,
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vtkm::Float32& bottom,
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vtkm::Float32& top) const;
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/// \brief The mode of the camera (2D or 3D).
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///
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/// \c vtkm::Camera can be set to a 2D or 3D mode. 2D mode is used for
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/// looking at data in the x-y plane. 3D mode allows the camera to be
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/// positioned anywhere and pointing at any place in 3D.
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///
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VTKM_CONT
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vtkm::rendering::Camera::ModeEnum GetMode() const { return this->Mode; }
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VTKM_CONT
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void SetMode(vtkm::rendering::Camera::ModeEnum mode) { this->Mode = mode; }
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VTKM_CONT
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void SetModeTo3D() { this->SetMode(vtkm::rendering::Camera::MODE_3D); }
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VTKM_CONT
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void SetModeTo2D() { this->SetMode(vtkm::rendering::Camera::MODE_2D); }
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/// \brief The clipping range of the camera.
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///
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/// The clipping range establishes the near and far clipping planes. These
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/// clipping planes are parallel to the viewing plane. The planes are defined
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/// by simply specifying the distance from the viewpoint. Renderers can (and
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/// usually do) remove any geometry closer than the near plane and further
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/// than the far plane.
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///
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/// For precision purposes, it is best to place the near plane as far away as
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/// possible (while still being in front of any geometry). The far plane
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/// usually has less effect on the depth precision, so can be placed well far
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/// behind the geometry.
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///
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VTKM_CONT
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vtkm::Range GetClippingRange() const { return vtkm::Range(this->NearPlane, this->FarPlane); }
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VTKM_CONT
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void SetClippingRange(vtkm::Float32 nearPlane, vtkm::Float32 farPlane)
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{
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this->NearPlane = nearPlane;
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this->FarPlane = farPlane;
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}
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VTKM_CONT
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void SetClippingRange(vtkm::Float64 nearPlane, vtkm::Float64 farPlane)
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{
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this->SetClippingRange(static_cast<vtkm::Float32>(nearPlane),
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static_cast<vtkm::Float32>(farPlane));
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}
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VTKM_CONT
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void SetClippingRange(const vtkm::Range& nearFarRange)
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{
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this->SetClippingRange(nearFarRange.Min, nearFarRange.Max);
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}
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/// \brief The viewport of the projection
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///
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/// The projection of the camera can be offset to be centered around a subset
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/// of the rendered image. This is established with a "viewport," which is
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/// defined by the left/right and bottom/top of this viewport. The values of
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/// the viewport are relative to the rendered image's bounds. The left and
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/// bottom of the image are at -1 and the right and top are at 1.
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///
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VTKM_CONT
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void GetViewport(vtkm::Float32& left,
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vtkm::Float32& right,
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vtkm::Float32& bottom,
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vtkm::Float32& top) const
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{
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left = this->ViewportLeft;
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right = this->ViewportRight;
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bottom = this->ViewportBottom;
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top = this->ViewportTop;
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}
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VTKM_CONT
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void GetViewport(vtkm::Float64& left,
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vtkm::Float64& right,
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vtkm::Float64& bottom,
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vtkm::Float64& top) const
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{
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left = this->ViewportLeft;
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right = this->ViewportRight;
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bottom = this->ViewportBottom;
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top = this->ViewportTop;
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}
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VTKM_CONT
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vtkm::Bounds GetViewport() const
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{
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return vtkm::Bounds(
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this->ViewportLeft, this->ViewportRight, this->ViewportBottom, this->ViewportTop, 0.0, 0.0);
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}
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VTKM_CONT
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void SetViewport(vtkm::Float32 left, vtkm::Float32 right, vtkm::Float32 bottom, vtkm::Float32 top)
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{
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this->ViewportLeft = left;
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this->ViewportRight = right;
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this->ViewportBottom = bottom;
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this->ViewportTop = top;
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}
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VTKM_CONT
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void SetViewport(vtkm::Float64 left, vtkm::Float64 right, vtkm::Float64 bottom, vtkm::Float64 top)
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{
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this->SetViewport(static_cast<vtkm::Float32>(left),
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static_cast<vtkm::Float32>(right),
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static_cast<vtkm::Float32>(bottom),
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static_cast<vtkm::Float32>(top));
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}
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VTKM_CONT
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void SetViewport(const vtkm::Bounds& viewportBounds)
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{
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this->SetViewport(
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viewportBounds.X.Min, viewportBounds.X.Max, viewportBounds.Y.Min, viewportBounds.Y.Max);
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}
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/// \brief The focal point the camera is looking at in 3D mode
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///
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/// When in 3D mode, the camera is set up to be facing the \c LookAt
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/// position. If \c LookAt is set, the mode is changed to 3D mode.
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///
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VTKM_CONT
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const vtkm::Vec<vtkm::Float32, 3>& GetLookAt() const { return this->Camera3D.LookAt; }
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VTKM_CONT
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void SetLookAt(const vtkm::Vec<vtkm::Float32, 3>& lookAt)
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{
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this->SetModeTo3D();
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this->Camera3D.LookAt = lookAt;
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}
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VTKM_CONT
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void SetLookAt(const vtkm::Vec<Float64, 3>& lookAt)
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{
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this->SetLookAt(vtkm::Vec<Float32, 3>(lookAt));
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}
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/// \brief The spatial position of the camera in 3D mode
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///
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/// When in 3D mode, the camera is modeled to be at a particular location. If
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/// \c Position is set, the mode is changed to 3D mode.
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///
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VTKM_CONT
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const vtkm::Vec<vtkm::Float32, 3>& GetPosition() const { return this->Camera3D.Position; }
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VTKM_CONT
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void SetPosition(const vtkm::Vec<vtkm::Float32, 3>& position)
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{
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this->SetModeTo3D();
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this->Camera3D.Position = position;
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}
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VTKM_CONT
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void SetPosition(const vtkm::Vec<vtkm::Float64, 3>& position)
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{
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this->SetPosition(vtkm::Vec<vtkm::Float32, 3>(position));
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}
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/// \brief The up orientation of the camera in 3D mode
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///
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/// When in 3D mode, the camera is modeled to be at a particular location and
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/// looking at a particular spot. The view up vector orients the rotation of
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/// the image so that the top of the image is in the direction pointed to by
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/// view up. If \c ViewUp is set, the mode is changed to 3D mode.
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///
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VTKM_CONT
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const vtkm::Vec<vtkm::Float32, 3>& GetViewUp() const { return this->Camera3D.ViewUp; }
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VTKM_CONT
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void SetViewUp(const vtkm::Vec<vtkm::Float32, 3>& viewUp)
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{
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this->SetModeTo3D();
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this->Camera3D.ViewUp = viewUp;
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}
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VTKM_CONT
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void SetViewUp(const vtkm::Vec<vtkm::Float64, 3>& viewUp)
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{
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this->SetViewUp(vtkm::Vec<vtkm::Float32, 3>(viewUp));
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}
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/// \brief The xscale of the camera
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///
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/// The xscale forces the 2D curves to be full-frame
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///
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/// Setting the xscale changes the mode to 2D.
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///
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VTKM_CONT
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vtkm::Float32 GetXScale() const { return this->Camera2D.XScale; }
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VTKM_CONT
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void SetXScale(vtkm::Float32 xscale)
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{
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this->SetModeTo2D();
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this->Camera2D.XScale = xscale;
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}
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VTKM_CONT
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void SetXScale(vtkm::Float64 xscale) { this->SetXScale(static_cast<vtkm::Float32>(xscale)); }
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/// \brief The field of view angle
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///
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/// The field of view defines the angle (in degrees) that are visible from
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/// the camera position.
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///
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/// Setting the field of view changes the mode to 3D.
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///
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VTKM_CONT
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vtkm::Float32 GetFieldOfView() const { return this->Camera3D.FieldOfView; }
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VTKM_CONT
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void SetFieldOfView(vtkm::Float32 fov)
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{
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this->SetModeTo3D();
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this->Camera3D.FieldOfView = fov;
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}
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VTKM_CONT
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void SetFieldOfView(vtkm::Float64 fov) { this->SetFieldOfView(static_cast<vtkm::Float32>(fov)); }
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/// \brief Pans the camera
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///
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void Pan(vtkm::Float32 dx, vtkm::Float32 dy);
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/// \brief Pans the camera
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///
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VTKM_CONT
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void Pan(vtkm::Float64 dx, vtkm::Float64 dy)
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{
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this->Pan(static_cast<vtkm::Float32>(dx), static_cast<vtkm::Float32>(dy));
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}
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VTKM_CONT
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void Pan(vtkm::Vec<vtkm::Float32, 2> direction) { this->Pan(direction[0], direction[1]); }
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VTKM_CONT
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void Pan(vtkm::Vec<vtkm::Float64, 2> direction) { this->Pan(direction[0], direction[1]); }
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VTKM_CONT
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vtkm::Vec<vtkm::Float32, 2> GetPan() const
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{
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vtkm::Vec<vtkm::Float32, 2> pan;
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pan[0] = this->Camera3D.XPan;
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pan[1] = this->Camera3D.YPan;
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return pan;
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}
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/// \brief Zooms the camera in or out
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///
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/// Zooming the camera scales everything in the image up or down. Positive
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/// zoom makes the geometry look bigger or closer. Negative zoom has the
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/// opposite effect. A zoom of 0 has no effect.
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///
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void Zoom(vtkm::Float32 zoom);
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VTKM_CONT
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void Zoom(vtkm::Float64 zoom) { this->Zoom(static_cast<vtkm::Float32>(zoom)); }
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VTKM_CONT
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vtkm::Float32 GetZoom() const { return this->Camera3D.Zoom; }
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/// \brief Moves the camera as if a point was dragged along a sphere.
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///
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/// \c TrackballRotate takes the normalized screen coordinates (in the range
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/// -1 to 1) and rotates the camera around the \c LookAt position. The rotation
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/// first projects the points to a sphere around the \c LookAt position. The
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/// camera is then rotated as if the start point was dragged to the end point
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/// along with the world.
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///
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/// \c TrackballRotate changes the mode to 3D.
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///
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void TrackballRotate(vtkm::Float32 startX,
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vtkm::Float32 startY,
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vtkm::Float32 endX,
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vtkm::Float32 endY);
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VTKM_CONT
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void TrackballRotate(vtkm::Float64 startX,
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vtkm::Float64 startY,
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vtkm::Float64 endX,
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vtkm::Float64 endY)
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{
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this->TrackballRotate(static_cast<vtkm::Float32>(startX),
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static_cast<vtkm::Float32>(startY),
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static_cast<vtkm::Float32>(endX),
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static_cast<vtkm::Float32>(endY));
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}
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/// \brief Set up the camera to look at geometry
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///
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/// \c ResetToBounds takes a \c Bounds structure containing the bounds in
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/// 3D space that contain the geometry being rendered. This method sets up
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/// the camera so that it is looking at this region in space. The view
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/// direction is preserved.
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///
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void ResetToBounds(const vtkm::Bounds& dataBounds);
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/// \brief Set up the camera to look at geometry with padding
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///
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/// \c ResetToBounds takes a \c Bounds structure containing the bounds in
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/// 3D space that contain the geometry being rendered and a \c Float64 value
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/// representing the percent that a view should be padded in x, y, and z.
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/// This method sets up the camera so that it is looking at this region in
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// space with the given padding percent. The view direction is preserved.
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///
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void ResetToBounds(const vtkm::Bounds& dataBounds, vtkm::Float64 dataViewPadding);
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void ResetToBounds(const vtkm::Bounds& dataBounds,
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vtkm::Float64 XDataViewPadding,
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vtkm::Float64 YDataViewPadding,
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vtkm::Float64 ZDataViewPadding);
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/// \brief Roll the camera
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///
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/// Rotates the camera around the view direction by the given angle. The
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/// angle is given in degrees.
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///
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/// Roll is currently only supported for 3D cameras.
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///
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void Roll(vtkm::Float32 angleDegrees);
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VTKM_CONT
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void Roll(vtkm::Float64 angleDegrees) { this->Roll(static_cast<vtkm::Float32>(angleDegrees)); }
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/// \brief Rotate the camera about the view up vector centered at the focal point.
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///
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/// Note that the view up vector is whatever was set via SetViewUp, and is
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/// not necessarily perpendicular to the direction of projection. The angle is
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/// given in degrees.
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///
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/// Azimuth only makes sense for 3D cameras, so the camera mode will be set
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/// to 3D when this method is called.
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///
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void Azimuth(vtkm::Float32 angleDegrees);
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VTKM_CONT
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void Azimuth(vtkm::Float64 angleDegrees)
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{
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this->Azimuth(static_cast<vtkm::Float32>(angleDegrees));
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}
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/// \brief Rotate the camera vertically around the focal point.
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///
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/// Specifically, this rotates the camera about the cross product of the
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/// negative of the direction of projection and the view up vector, using the
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/// focal point (LookAt) as the center of rotation. The angle is given
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/// in degrees.
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///
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/// Elevation only makes sense for 3D cameras, so the camera mode will be set
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/// to 3D when this method is called.
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///
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void Elevation(vtkm::Float32 angleDegrees);
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VTKM_CONT
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void Elevation(vtkm::Float64 angleDegrees)
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{
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this->Elevation(static_cast<vtkm::Float32>(angleDegrees));
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}
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/// \brief Move the camera toward or away from the focal point.
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///
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/// Specifically, this divides the camera's distance from the focal point
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/// (LookAt) by the given value. Use a value greater than one to dolly in
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/// toward the focal point, and use a value less than one to dolly-out away
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/// from the focal point.
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///
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/// Dolly only makes sense for 3D cameras, so the camera mode will be set to
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/// 3D when this method is called.
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///
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void Dolly(vtkm::Float32 value);
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VTKM_CONT
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void Dolly(vtkm::Float64 value) { this->Dolly(static_cast<vtkm::Float32>(value)); }
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/// \brief The viewable region in the x-y plane
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///
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/// When the camera is in 2D, it is looking at some region of the x-y plane.
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/// The region being looked at is defined by the range in x (determined by
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/// the left and right sides) and by the range in y (determined by the bottom
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/// and top sides).
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///
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/// \c SetViewRange2D changes the camera mode to 2D.
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///
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VTKM_CONT
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void GetViewRange2D(vtkm::Float32& left,
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vtkm::Float32& right,
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vtkm::Float32& bottom,
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vtkm::Float32& top) const
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{
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left = this->Camera2D.Left;
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right = this->Camera2D.Right;
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bottom = this->Camera2D.Bottom;
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top = this->Camera2D.Top;
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}
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VTKM_CONT
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vtkm::Bounds GetViewRange2D() const
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{
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return vtkm::Bounds(this->Camera2D.Left,
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this->Camera2D.Right,
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this->Camera2D.Bottom,
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this->Camera2D.Top,
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0.0,
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0.0);
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}
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VTKM_CONT
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void SetViewRange2D(vtkm::Float32 left,
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vtkm::Float32 right,
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vtkm::Float32 bottom,
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vtkm::Float32 top)
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{
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this->SetModeTo2D();
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this->Camera2D.Left = left;
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this->Camera2D.Right = right;
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this->Camera2D.Bottom = bottom;
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this->Camera2D.Top = top;
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|
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this->Camera2D.XPan = 0;
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this->Camera2D.YPan = 0;
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this->Camera2D.Zoom = 1;
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}
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VTKM_CONT
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void SetViewRange2D(vtkm::Float64 left,
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|
vtkm::Float64 right,
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|
vtkm::Float64 bottom,
|
|
vtkm::Float64 top)
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|
{
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|
this->SetViewRange2D(static_cast<vtkm::Float32>(left),
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|
static_cast<vtkm::Float32>(right),
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|
static_cast<vtkm::Float32>(bottom),
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|
static_cast<vtkm::Float32>(top));
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|
}
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|
VTKM_CONT
|
|
void SetViewRange2D(const vtkm::Range& xRange, const vtkm::Range& yRange)
|
|
{
|
|
this->SetViewRange2D(xRange.Min, xRange.Max, yRange.Min, yRange.Max);
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|
}
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|
VTKM_CONT
|
|
void SetViewRange2D(const vtkm::Bounds& viewRange)
|
|
{
|
|
this->SetViewRange2D(viewRange.X, viewRange.Y);
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|
}
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|
|
|
VTKM_CONT
|
|
void Print() const;
|
|
|
|
private:
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|
ModeEnum Mode;
|
|
Camera3DStruct Camera3D;
|
|
Camera2DStruct Camera2D;
|
|
|
|
vtkm::Float32 NearPlane;
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|
vtkm::Float32 FarPlane;
|
|
|
|
vtkm::Float32 ViewportLeft;
|
|
vtkm::Float32 ViewportRight;
|
|
vtkm::Float32 ViewportBottom;
|
|
vtkm::Float32 ViewportTop;
|
|
};
|
|
}
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|
} // namespace vtkm::rendering
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|
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#endif // vtk_m_rendering_Camera_h
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