C++ IVideoDriver::draw3DLine方法代码示例

	//! render
	void CLightSceneNode::render()
	{
		IVideoDriver* driver = SceneManager->getVideoDriver();
		if (!driver)
			return;

		if (DebugDataVisible & EDS_BBOX)
		{
			driver->setTransform(ETS_WORLD, AbsoluteTransformation);
			SMaterial m;
			m.Lighting = false;
			driver->setMaterial(m);

			switch (LightData.Type)
			{
			case ELT_POINT:
			case ELT_SPOT:
				driver->draw3DBox(BBox, LightData.DiffuseColor);
				break;

			case ELT_DIRECTIONAL:
				driver->draw3DLine(Vector3(0.f, 0.f, 0.f),
					LightData.Direction * LightData.Radius,
					LightData.DiffuseColor);
				break;
			default:
				break;
			}
		}

		DriverLightIndex = driver->addDynamicLight(LightData);
		setVisible(LightIsOn);
	}

// ----------------------------------------------------------------------------
void CheckLineHandler::draw()
{
    IVideoDriver* vd = Editor::getEditor()->getVideoDriver();

    std::list<CheckLine>::iterator it = m_check_lines.begin();

    while (it != m_check_lines.end() && it->active)
    {
        vd->draw3DLine(it->n1->getPosition(), it->n2->getPosition(), SColor(255, 255, 0, 0));
        it++;
    }

} // draw

// drawObject	
void CWayPoint::drawObject()
{
	if ( m_visible && m_next )
	{
		IVideoDriver *driver = getIView()->getDriver();

		// set material
		SMaterial debug_mat;	
		debug_mat.Lighting = false;
		debug_mat.AntiAliasing=0;
		driver->setMaterial(debug_mat);

		// reset transform
		core::matrix4 mat;
		mat.makeIdentity();
		driver->setTransform(video::ETS_WORLD, mat);

		// draw up
		driver->draw3DLine( m_position, m_next->getPosition(), SColor(255, 0, 255, 0) );
	}
}

// drawObject
void CGameCamera::drawObject()
{
	if ( m_visible && m_objectID != -1  && getIView()->getActiveCamera() != this )
	{
		IVideoDriver *driver = getIView()->getDriver();

		// set material
		SMaterial debug_mat;	
		debug_mat.Lighting = false;
		debug_mat.AntiAliasing=0;
		driver->setMaterial(debug_mat);

		// reset transform
		core::matrix4 mat;
		mat.makeIdentity();
		driver->setTransform(video::ETS_WORLD, mat);

		// draw up
		core::vector3df ray = (m_targetPos - m_position).normalize();

		driver->draw3DLine( m_position, m_position + ray*100, SColor(255, 255, 255, 0) );
	}
}

//! Tests projection matrices
static bool runTestWithDriver(E_DRIVER_TYPE driverType)
{
	IrrlichtDevice *device = createDevice( driverType, dimension2d<u32>(160, 120), 32);
	if (!device)
		return true; // Treat a failure to create a driver as benign; this saves a lot of #ifdefs

	IVideoDriver* driver = device->getVideoDriver();

	stabilizeScreenBackground(driver);

	logTestString("Testing driver %ls\n", driver->getName());

	bool result = true;

	driver->beginScene(true, false, SColor(255,0,0,0));
	                
	SMaterial mat;
	mat.MaterialType = EMT_SOLID;
	mat.Lighting = false;
	mat.ZBuffer = false;
	mat.ZWriteEnable = false;
	mat.Thickness = 1;

	driver->setMaterial(mat);

	core::dimension2d<f32> dims(driver->getCurrentRenderTargetSize());
	//apply custom projection, no offset
	core::matrix4 pmtx = matrix4().buildProjectionMatrixOrthoLH(dims.Width, dims.Height, 0, 100);
	driver->setTransform(ETS_PROJECTION, pmtx);
	driver->setTransform(ETS_VIEW, matrix4());
	driver->setTransform(ETS_WORLD, matrix4());

	//the red cross appears at center
	for (u32 i=0; i<10; ++i)
	{
		driver->draw3DLine(vector3df(0.f+i,-50.f,1.f), vector3df(0.f+i,50.f,1.f), SColor(255,255,0,0));
		driver->draw3DLine(vector3df(-50.f,0.f+i,1.f), vector3df(50.f,0.f+i,1.f), SColor(255,255,0,0));
	}

	//apply custom projection, offset to right-top
	pmtx.setTranslation(vector3df(0.7f, 0.7f, 0.f));
	driver->setTransform(ETS_PROJECTION, pmtx);
	driver->setTransform(ETS_VIEW, matrix4());
	driver->setTransform(ETS_WORLD, matrix4());

	//The green cross must be in right-top corner. But for OpenGL driver it is in left-top corner
	for (u32 i=0; i<10; ++i)
	{
		driver->draw3DLine(vector3df(0.f+i,-50,1), vector3df(0.f+i,50,1), SColor(255,0,255,0));
		driver->draw3DLine(vector3df(-50,0.f+i,1), vector3df(50,0.f+i,1), SColor(255,0,255,0));
	}

	driver->endScene();

	result = takeScreenshotAndCompareAgainstReference(driver, "-projMat.png", 98.71f);

	device->closeDevice();
	device->run();
	device->drop();

	return result;
}