119 lines
4.2 KiB
C++
119 lines
4.2 KiB
C++
// marker.cxx - 3D Marker pins in FlightGear
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// Copyright (C) 2022 Tobias Dammers
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// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include "Scenery/marker.hxx"
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#include <simgear/scene/util/SGNodeMasks.hxx>
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#include <simgear/scene/util/SGReaderWriterOptions.hxx>
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#include <simgear/scene/material/Effect.hxx>
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#include <simgear/scene/material/EffectGeode.hxx>
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#include <osg/Geometry>
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#include <osg/Material>
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#include <osg/Node>
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#include <osg/Billboard>
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#include <osgText/Text>
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#include <osgText/String>
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#include <osgDB/ReadFile>
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#include <osgDB/WriteFile>
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#include <osgDB/Registry>
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osg::Node* fgCreateMarkerNode(const osgText::String& label, float font_size, float pin_height, float tip_height, const osg::Vec4f& color)
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{
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auto mainNode = new osg::Group;
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auto textNode = new osg::Billboard;
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mainNode->addChild(textNode);
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textNode->setMode(osg::Billboard::AXIAL_ROT);
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auto text = new osgText::Text;
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text->setText(label);
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text->setAlignment(osgText::Text::CENTER_BOTTOM);
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text->setAxisAlignment(osgText::Text::XZ_PLANE);
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text->setFont("Fonts/LiberationFonts/LiberationSans-Regular.ttf");
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// text->setCharacterSizeMode(osgText::Text::OBJECT_COORDS_WITH_MAXIMUM_SCREEN_SIZE_CAPPED_BY_FONT_HEIGHT);
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text->setCharacterSize(font_size, 1.0f);
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text->setFontResolution(std::max(32.0f, font_size), std::max(32.0f, font_size));
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text->setColor(color);
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text->setPosition(osg::Vec3(0, 0, pin_height));
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text->setBackdropType(osgText::Text::OUTLINE);
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text->setBackdropColor(osg::Vec4(0, 0, 0, 0.75));
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textNode->addDrawable(text);
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float top_spacing = font_size * 0.25;
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if (pin_height - top_spacing > tip_height) {
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osg::Vec4f solid = color;
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osg::Vec4f transparent = color;
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osg::Vec3f nvec(0, 1, 0);
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solid[3] = 1.0f;
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transparent[3] = 0.0f;
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auto geoNode = new simgear::EffectGeode;
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mainNode->addChild(geoNode);
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auto pinGeo = new osg::Geometry;
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osg::Vec3Array* vtx = new osg::Vec3Array;
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osg::Vec3Array* nor = new osg::Vec3Array;
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osg::Vec4Array* rgb = new osg::Vec4Array;
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nor->push_back(nvec);
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vtx->push_back(osg::Vec3f(0, 0, tip_height));
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rgb->push_back(solid);
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vtx->push_back(osg::Vec3f(-font_size * 0.125, 0, pin_height - top_spacing));
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rgb->push_back(transparent);
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vtx->push_back(osg::Vec3f(0, 0, tip_height));
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rgb->push_back(solid);
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vtx->push_back(osg::Vec3f(0, font_size * 0.125, pin_height - top_spacing));
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rgb->push_back(transparent);
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vtx->push_back(osg::Vec3f(0, 0, tip_height));
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rgb->push_back(solid);
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vtx->push_back(osg::Vec3f(font_size * 0.125, 0, pin_height - top_spacing));
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rgb->push_back(transparent);
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vtx->push_back(osg::Vec3f(0, 0, tip_height));
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rgb->push_back(solid);
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vtx->push_back(osg::Vec3f(0, -font_size * 0.125, pin_height - top_spacing));
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rgb->push_back(transparent);
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vtx->push_back(osg::Vec3f(0, 0, tip_height));
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rgb->push_back(solid);
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vtx->push_back(osg::Vec3f(-font_size * 0.125, 0, pin_height - top_spacing));
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rgb->push_back(transparent);
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pinGeo->setVertexArray(vtx);
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pinGeo->setColorArray(rgb, osg::Array::BIND_PER_VERTEX);
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pinGeo->setNormalArray(nor, osg::Array::BIND_OVERALL);
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pinGeo->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::QUAD_STRIP, 0, vtx->size()));
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geoNode->addDrawable(pinGeo);
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auto stateSet = geoNode->getOrCreateStateSet();
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stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
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stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
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stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
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stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
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stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
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osg::ref_ptr<simgear::SGReaderWriterOptions> opt;
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opt = simgear::SGReaderWriterOptions::copyOrCreate(osgDB::Registry::instance()->getOptions());
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simgear::Effect* effect = simgear::makeEffect("Effects/marker-pin", true, opt);
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if (effect)
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geoNode->setEffect(effect);
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}
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mainNode->setNodeMask(~simgear::CASTSHADOW_BIT);
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return mainNode;
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}
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