QT QColor颜色选择器并获取rgb值

QColorDialog color;//调出颜色选择器对话框
	QColor c = color.getRgba();
//c.red(), c.green(), c.blue()是分别对应的rgb值

应用在PCL中

void PCLVisualizer::colorSelector()
{
	QColorDialog color;
	QColor c = color.getRgba();

	pcl::visualization::PointCloudColorHandlerCustom pointColor(clicked_points_3d, c.red(), c.green(), c.blue());
	viewer->addPointCloud(clicked_points_3d, pointColor, cloudName);
	viewer->setPointCloudRenderingProperties(pcl::visualization::PCL_VISUALIZER_POINT_SIZE, 3, cloudName);
	ui.qvtkWidget->update();
}