[QGLViewer]3D场景鼠标点击位置

重载鼠标事件：

void AxMapControl::mousePressEvent(QMouseEvent* e)

{

	switch(currentTool)

	{

		case AX_DRAW_DIRECTION:

			{

				if (e->button() == Qt::LeftButton)

				{

					QPoint screenPt=e->pos();

					qglviewer::Vec orig1, dir1;

					camera()->convertClickToLine(screenPt, orig1, dir1);

					double valueZ=0;

					double a = ( valueZ- orig1.z) / dir1.z;

					Pnt.z = valueZ;

					Pnt.x = orig1.x + dir1.x * a;

					Pnt.y = orig1.y + dir1.y * a;

					//QMessageBox::information(this, "PickPoint",	QString::number(Pnt.x) + "," + QString::number(Pnt.y));

				}

				break;

			}

	}

	QGLViewer::mousePressEvent(e);

}

重载绘制方法

void AxMapControl::draw()

{

		if (pimpl->points.size()>0)

		{

			QMutexLocker locker(&pimpl->mutex_);

			glColor3f(255/255.0, 69/255.0, 0.0);

			draw_3d_points(pimpl->points);

		}

		if (pimpl->pointCloudOneFrame.size()>0)

		{

			QMutexLocker locker(&pimpl->mutex_);

			glColor3f(255/255.0, 69/255.0, 0.0);

			for (vector<Point3ds>::const_iterator it = pimpl->pointCloudOneFrame.begin();it != pimpl->pointCloudOneFrame.end(); ++it)

			{

				const Point3ds& p = *it;

				if (p.size()>0)

				{

					draw_3d_points(p);

				}

			}

		}

		if (!glImg.isNull())

		{

			glNormal3f(0.0, 0.0, 1.0);

			glBegin(GL_QUADS);

			glTexCoord2f(0.0,   1.0-v_max);

			glVertex2f(-u_max*ratio,-v_max);

			glTexCoord2f(0.0,   1.0);

			glVertex2f(-u_max*ratio, v_max);

			glTexCoord2f(u_max, 1.0);

			glVertex2f( u_max*ratio, v_max);

			glTexCoord2f(u_max, 1.0-v_max);

			glVertex2f( u_max*ratio,-v_max);

			glEnd();

		}

		if (currentTool==AX_DRAW_DIRECTION)

		{

			glBegin(GL_LINES);

			glColor3f(255/255.0, 0/255.0, 0.0);

			glVertex3fv(currentPose);

			glVertex3fv(Pnt);

			glEnd();

		}

效果：

[QGLViewer]3D场景鼠标点击位置的相关教程结束。