mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-20 11:05:44 +00:00
c446f1bc7a
Also made the TextAnnotation classes conform better to VTK-m coding style. Specifically, changed the order of words in subclass names (e.g. TextAnnotationBillboard instead of BillboardTextAnnotation) and broke out each subclass into its own header/source files.
122 lines
3.8 KiB
C++
122 lines
3.8 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 2016 Sandia Corporation.
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// Copyright 2016 UT-Battelle, LLC.
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// Copyright 2016 Los Alamos National Security.
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//
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// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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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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#include <vtkm/rendering/TextAnnotationBillboard.h>
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#include <vtkm/Matrix.h>
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namespace vtkm {
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namespace rendering {
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TextAnnotationBillboard::TextAnnotationBillboard(
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const std::string &text,
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const vtkm::rendering::Color &color,
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vtkm::Float32 scalar,
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const vtkm::Vec<vtkm::Float32,3> &position,
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vtkm::Float32 angleDegrees)
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: TextAnnotation(text, color, scalar),
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Position(position),
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Angle(angleDegrees)
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{ }
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TextAnnotationBillboard::~TextAnnotationBillboard()
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{ }
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void TextAnnotationBillboard::SetPosition(
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const vtkm::Vec<vtkm::Float32,3> &position)
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{
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this->Position = position;
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}
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void TextAnnotationBillboard::SetPosition(
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vtkm::Float32 xpos, vtkm::Float32 ypos, vtkm::Float32 zpos)
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{
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this->SetPosition(vtkm::make_Vec(xpos, ypos, zpos));
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}
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void TextAnnotationBillboard::Render(
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const vtkm::rendering::Camera &camera,
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const vtkm::rendering::WorldAnnotator &worldAnnotator,
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vtkm::rendering::Canvas &canvas) const
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{
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using MatrixType = vtkm::Matrix<vtkm::Float32,4,4>;
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using VectorType = vtkm::Vec<vtkm::Float32,3>;
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MatrixType viewMatrix = camera.CreateViewMatrix();
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MatrixType projectionMatrix
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= camera.CreateProjectionMatrix(canvas.GetWidth(), canvas.GetHeight());
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VectorType screenPos =
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vtkm::Transform3DPointPerspective(
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vtkm::MatrixMultiply(projectionMatrix,viewMatrix),
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this->Position);
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canvas.SetViewToScreenSpace(camera,true);
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MatrixType translateMatrix =
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vtkm::Transform3DTranslate(screenPos[0], screenPos[1], -screenPos[2]);
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vtkm::Float32 windowAspect =
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vtkm::Float32(canvas.GetWidth()) / vtkm::Float32(canvas.GetHeight());
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MatrixType scaleMatrix = vtkm::Transform3DScale(1.f/windowAspect, 1.f, 1.f);
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MatrixType viewportMatrix;
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vtkm::MatrixIdentity(viewportMatrix);
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//if view type == 2D?
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{
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vtkm::Float32 vl, vr, vb, vt;
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camera.GetRealViewport(canvas.GetWidth(),canvas.GetHeight(),vl,vr,vb,vt);
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vtkm::Float32 xs = (vr-vl);
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vtkm::Float32 ys = (vt-vb);
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viewportMatrix = vtkm::Transform3DScale(2.f/xs, 2.f/ys, 1.f);
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}
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MatrixType rotateMatrix =
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vtkm::Transform3DRotateZ(this->Angle * 3.14159265f / 180.f);
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vtkm::Matrix<vtkm::Float32, 4, 4> fullTransformMatrix =
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vtkm::MatrixMultiply(translateMatrix,
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vtkm::MatrixMultiply(scaleMatrix,
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vtkm::MatrixMultiply(viewportMatrix,
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rotateMatrix)));
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VectorType origin =
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vtkm::Transform3DPointPerspective(fullTransformMatrix, VectorType(0,0,0));
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VectorType right =
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vtkm::Transform3DVector(fullTransformMatrix, VectorType(1,0,0));
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VectorType up =
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vtkm::Transform3DVector(fullTransformMatrix, VectorType(0,1,0));
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worldAnnotator.AddText(origin,
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right,
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up,
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this->Scale,
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this->Anchor,
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this->TextColor,
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this->Text);
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canvas.SetViewToWorldSpace(camera,true);
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}
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}
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} // vtkm::rendering
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