create/src/Gui/ViewProviderPlane.cpp

/***************************************************************************
 *   Copyright (c) 2012 Jürgen Riegel <juergen.riegel@web.de>              *
 *   Copyright (c) 2015 Alexander Golubev (Fat-Zer) <fatzer2@gmail.com>    *
 *                                                                         *
 *   This file is part of the FreeCAD CAx development system.              *
 *                                                                         *
 *   This library is free software; you can redistribute it and/or         *
 *   modify it under the terms of the GNU Library General Public           *
 *   License as published by the Free Software Foundation; either          *
 *   version 2 of the License, or (at your option) any later version.      *
 *                                                                         *
 *   This library  is distributed in the hope that it will be useful,      *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU Library General Public License for more details.                  *
 *                                                                         *
 *   You should have received a copy of the GNU Library General Public     *
 *   License along with this library; see the file COPYING.LIB. If not,    *
 *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
 *   Suite 330, Boston, MA  02111-1307, USA                                *
 *                                                                         *
 ***************************************************************************/

#include "PreCompiled.h"

#ifndef _PreComp_
# include <Inventor/nodes/SoText2.h>
# include <Inventor/nodes/SoAsciiText.h>
# include <Inventor/nodes/SoCoordinate3.h>
# include <Inventor/nodes/SoFaceSet.h>
# include <Inventor/nodes/SoIndexedLineSet.h>
# include <Inventor/nodes/SoMaterial.h>
# include <Inventor/nodes/SoPickStyle.h>
# include <Inventor/nodes/SoSeparator.h>
# include <Inventor/nodes/SoShapeHints.h>
# include <Inventor/nodes/SoTranslation.h>
# include <Inventor/SbColor.h>
#endif

#include <App/Datums.h>
#include <Gui/ViewParams.h>

#include "ViewProviderPlane.h"
#include "ViewProviderCoordinateSystem.h"


using namespace Gui;

PROPERTY_SOURCE(Gui::ViewProviderPlane, Gui::ViewProviderDatum)


ViewProviderPlane::ViewProviderPlane()
{
    sPixmap = "Std_Plane";
    lineThickness = 1.0;
}

ViewProviderPlane::~ViewProviderPlane() = default;

void ViewProviderPlane::attach(App::DocumentObject * obj) {
    ViewProviderDatum::attach(obj);

    const char* name = pcObject->getNameInDocument();

    // Setup colors
    auto material = new SoMaterial();
    SbColor color;
    material->transparency.setValue(0.95f);
    float alpha = 0.0f;
    float lineTransparency = 0.5;
    bool noRole = false;
    auto planesRoles = App::LocalCoordinateSystem::PlaneRoles;
    if (strncmp(name, planesRoles[0], strlen(planesRoles[0])) == 0) {
        // XY-axis: blue
        ShapeAppearance.setDiffuseColor(ViewParams::instance()->getAxisZColor());
        ShapeAppearance.setTransparency(lineTransparency);
        color.setPackedValue(ViewParams::instance()->getAxisZColor(), alpha);
    }
    else if (strncmp(name, planesRoles[1], strlen(planesRoles[1])) == 0) {
        // XZ-axis: green
        ShapeAppearance.setDiffuseColor(ViewParams::instance()->getAxisYColor());
        ShapeAppearance.setTransparency(lineTransparency);
        color.setPackedValue(ViewParams::instance()->getAxisYColor(), alpha);
    }
    else if (strncmp(name, planesRoles[2], strlen(planesRoles[2])) == 0) {
        // YZ-axis: red
        ShapeAppearance.setDiffuseColor(ViewParams::instance()->getAxisXColor());
        ShapeAppearance.setTransparency(lineTransparency);
        color.setPackedValue(ViewParams::instance()->getAxisXColor(), alpha);
    }
    else {
        noRole = true;
    }

    static const float size = App::GetApplication().GetParameterGroupByPath("User parameter:BaseApp/Preferences/View")->GetFloat("DatumPlaneSize", 40.0);
    static const float startSize = 0.25 * size; //NOLINT


    SbVec3f verts[4];
    if (noRole) {
        verts[0] = SbVec3f(size, size, 0);
        verts[1] = SbVec3f(size, -size, 0);
        verts[2] = SbVec3f(-size, -size, 0);
        verts[3] = SbVec3f(-size, size, 0);
    }
    else {
        verts[0] = SbVec3f(size, size, 0);
        verts[1] = SbVec3f(size, startSize, 0);
        verts[2] = SbVec3f(startSize, startSize, 0);
        verts[3] = SbVec3f(startSize, size, 0);
    }


    // indexes used to create the edges
    static const int32_t lines[6] = { 0, 1, 2, 3, 0, -1 };

    SoSeparator* sep = getDatumRoot();

    auto pCoords = new SoCoordinate3();
    pCoords->point.setNum(4);
    pCoords->point.setValues(0, 4, verts);
    sep->addChild(pCoords);

    auto pLines = new SoIndexedLineSet();
    pLines->coordIndex.setNum(6);
    pLines->coordIndex.setValues(0, 6, lines);
    sep->addChild(pLines);

    // add semi transparent face
    auto faceSeparator = new SoSeparator();
    sep->addChild(faceSeparator);


    material->ambientColor.setValue(color);
    material->diffuseColor.setValue(color);
    faceSeparator->addChild(material);

    // disable backface culling and render with two-sided lighting
    auto shapeHints = new SoShapeHints();
    shapeHints->vertexOrdering = SoShapeHints::COUNTERCLOCKWISE;
    shapeHints->shapeType = SoShapeHints::UNKNOWN_SHAPE_TYPE;
    faceSeparator->addChild(shapeHints);

    auto pickStyle = new SoPickStyle();
    pickStyle->style = SoPickStyle::SHAPE_ON_TOP;
    faceSeparator->addChild(pickStyle);

    auto faceSet = new SoFaceSet();
    auto vertexProperty = new SoVertexProperty();
    vertexProperty->vertex.setValues(0, 4, verts);
    faceSet->vertexProperty.setValue(vertexProperty);
    faceSeparator->addChild(faceSet);

    auto ps = new SoPickStyle();
    ps->style.setValue(SoPickStyle::BOUNDING_BOX);
    sep->addChild(ps);

    sep->addChild(getLabel());
}