osg改变飞机航迹颜色

在OpenSceneGraph中，可以通过设置飞机模型的颜色来改变飞机航迹的颜色。可以通过以下步骤实现：

1. 创建颜色状态：osg::ref_ptr<osg::StateSet> stateSet = new osg::StateSet();osg::ref_ptr<osg::Vec4Array> colors = new osg::Vec4Array();colors->push_back(osg::Vec4(1.0f, 0.0f, 0.0f, 1.0f));//设置红色颜色colors->setDataVariance(osg::Object::DYNAMIC);stateSet->setAttributeAndModes(new osg::ColorMaterial(), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);stateSet->setMode(GL_COLOR_MATERIAL, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);stateSet->setMode(GL_BLEND, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);stateSet->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
2. 将颜色状态设置到飞机模型上：aircraftNode->setStateSet(stateSet);
3. 如果需要动态修改飞机颜色，可以使用下面的代码：osg::Vec4Array* colors = dynamic_cast<osg::Vec4Array*>(stateSet->getAttribute(osg::StateAttribute::MATERIAL)->asColorArray());if (colors) { colors->at(0) = osg::Vec4(0.0f, 1.0f, 0.0f, 1.0f);//设置绿色颜色 colors->dirty();}