137 lines
4.9 KiB
C++
137 lines
4.9 KiB
C++
/***************************************************************************
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* Copyright (c) 2013 Thomas Anderson <blobfish[at]gmx.com> *
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* *
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* This file is part of the FreeCAD CAx development system. *
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* *
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* This library is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU Library General Public *
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* License as published by the Free Software Foundation; either *
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* version 2 of the License, or (at your option) any later version. *
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* *
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* This library is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU Library General Public License for more details. *
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* *
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* You should have received a copy of the GNU Library General Public *
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* License along with this library; see the file COPYING.LIB. If not, *
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* write to the Free Software Foundation, Inc., 59 Temple Place, *
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* Suite 330, Boston, MA 02111-1307, USA *
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* *
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***************************************************************************/
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#include "PreCompiled.h"
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#include "ArcEngine.h"
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#include <limits>
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#include <vector>
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# include <Inventor/engines/SoCalculator.h>
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# include <Inventor/engines/SoComposeVec3f.h>
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# include <Inventor/engines/SoConcatenate.h>
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# include <Inventor/engines/SoComposeRotation.h>
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# include <Inventor/engines/SoComposeRotationFromTo.h>
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# include <Inventor/nodekits/SoShapeKit.h>
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# include <Inventor/nodes/SoCone.h>
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# include <Inventor/nodes/SoFont.h>
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# include <Inventor/nodes/SoLineSet.h>
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# include <Inventor/nodes/SoMaterial.h>
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# include <Inventor/nodes/SoMatrixTransform.h>
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# include <Inventor/nodes/SoResetTransform.h>
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# include <Inventor/nodes/SoSeparator.h>
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# include <Inventor/nodes/SoTransform.h>
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# include <Inventor/nodes/SoVertexProperty.h>
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using namespace Gui;
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SO_ENGINE_SOURCE(ArcEngine)
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ArcEngine::ArcEngine()
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{
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SO_ENGINE_CONSTRUCTOR(ArcEngine);
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SO_ENGINE_ADD_INPUT(radius, (10.0));
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SO_ENGINE_ADD_INPUT(angle, (1.0));
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SO_ENGINE_ADD_INPUT(deviation, (0.25));
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SO_ENGINE_ADD_OUTPUT(points, SoMFVec3f);
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SO_ENGINE_ADD_OUTPUT(pointCount, SoSFInt32);
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SO_ENGINE_ADD_OUTPUT(midpoint, SoSFVec3f);
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}
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void ArcEngine::initClass()
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{
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SO_ENGINE_INIT_CLASS(ArcEngine, SoEngine, "Engine");
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}
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void ArcEngine::evaluate()
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{
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float angle = abs(this->angle.getValue());
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if (radius.getValue() < std::numeric_limits<float>::epsilon() ||
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deviation.getValue() < std::numeric_limits<float>::epsilon())
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{
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defaultValues();
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return;
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}
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float deviationAngle(acos((radius.getValue() - deviation.getValue()) / radius.getValue()));
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std::vector<SbVec3f> tempPoints;
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int segmentCount;
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if (deviationAngle >= angle) {
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segmentCount = 1;
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}
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else {
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segmentCount = static_cast<int>(angle / deviationAngle) + 1;
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if (segmentCount < 2) {
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defaultValues();
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return;
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}
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}
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float angleIncrement = (this->angle.getValue() > 0 ? angle : -angle) / static_cast<float>(segmentCount);
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for (int index = 0; index < segmentCount + 1; ++index)
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{
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SbVec3f currentNormal(1.0, 0.0, 0.0);
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float currentAngle = index * angleIncrement;
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SbRotation rotation(SbVec3f(0.0, 0.0, 1.0), currentAngle);
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rotation.multVec(currentNormal, currentNormal);
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tempPoints.push_back(currentNormal * radius.getValue());
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}
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int tempCount = tempPoints.size(); //for macro.
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SO_ENGINE_OUTPUT(points, SoMFVec3f, setNum(tempCount));
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SO_ENGINE_OUTPUT(pointCount, SoSFInt32, setValue(tempCount));
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std::vector<SbVec3f>::const_iterator it;
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for (it = tempPoints.begin(); it != tempPoints.end(); ++it)
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{
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int currentIndex = it-tempPoints.begin(); //for macro.
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SbVec3f temp(*it); //for macro
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SO_ENGINE_OUTPUT(points, SoMFVec3f, set1Value(currentIndex, temp));
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}
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// Get Midpoint
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float a = angle / 2;
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SbRotation rot(SbVec3f(0.0, 0.0, 1.0), a);
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SbVec3f midPnt(1.0, 0.0, 0.0);
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rot.multVec(midPnt, midPnt);
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midPnt = midPnt * radius.getValue();
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SO_ENGINE_OUTPUT(midpoint, SoSFVec3f, setValue(midPnt));
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}
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void ArcEngine::defaultValues()
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{
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//just some non-failing info.
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SO_ENGINE_OUTPUT(points, SoMFVec3f, setNum(2));
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SbVec3f point1(10.0, 0.0, 0.0);
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SO_ENGINE_OUTPUT(points, SoMFVec3f, set1Value(0, point1));
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SbVec3f point2(7.07f, 7.07f, 0.0);
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SO_ENGINE_OUTPUT(points, SoMFVec3f, set1Value(1, point2));
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SO_ENGINE_OUTPUT(pointCount, SoSFInt32, setValue(2));
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SbVec3f point3(7.07f, 7.07f, 0.0);
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SO_ENGINE_OUTPUT(midpoint, SoSFVec3f, setValue(point3));
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}
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