C++ Matrix4::setTrans方法代码示例

int IcoSphere::addToVertices(std::list<VertexPair> *target, const Ogre::Vector3 &position, const Ogre::ColourValue &colour, float scale)
{
	Ogre::Matrix4 transform = Ogre::Matrix4::IDENTITY;
	transform.setTrans(position);
	transform.setScale(Ogre::Vector3(scale, scale, scale));
 
	for (int i = 0; i < (int)vertices.size(); i++)
		target->push_back(VertexPair(transform * vertices[i], colour));

	return vertices.size();
}

    void
    BoxCenterMovable::getBoundingBoxCenter()
    {
        if(object.lock()->hasProperty("bounding box") && object.lock()->hasProperty("position"))
        {
            Ogre::AxisAlignedBox aabb = VariantCast<Ogre::AxisAlignedBox>(object.lock()->getProperty("bounding box"));
            /*Ogre::Vector3 position = VariantCast<Ogre::Vector3>(object.lock()->getProperty("position"));
            Ogre::Matrix4 matTrans;
            matTrans.makeTrans( position );
            aabb.transformAffine(matTrans);*/

			Ogre::Matrix4 transform = Ogre::Matrix4::IDENTITY;

			Ogre::Matrix3 rot3x3;
			if (object.lock()->hasProperty("orientation"))
			{
				Ogre::Quaternion orientation = VariantCast<Ogre::Quaternion>(object.lock()->getProperty("orientation"));
				orientation.ToRotationMatrix(rot3x3);
			}
			else
			{
				rot3x3 = Ogre::Matrix3::IDENTITY;
			}

			Ogre::Matrix3 scale3x3;
			if (object.lock()->hasProperty("scale"))
			{
				Ogre::Vector3 scale = VariantCast<Ogre::Vector3>(object.lock()->getProperty("scale"));
				scale3x3 = Ogre::Matrix3::ZERO;
				scale3x3[0][0] = scale.x;
				scale3x3[1][1] = scale.y;
				scale3x3[2][2] = scale.z;
			}
			else
			{
				scale3x3 = Ogre::Matrix3::IDENTITY;
			}

			transform = rot3x3 * scale3x3;

			if (object.lock()->hasProperty("position"))
			{
				Ogre::Vector3 position = VariantCast<Ogre::Vector3>(object.lock()->getProperty("position"));
				transform.setTrans(position);
			}
			aabb.transformAffine(transform);

            mCenterPosWC = aabb.getCenter();
        }
    }

//
// 根据输入的平移， 旋转， 缩放分量创建出位置变换矩阵.
//
void FairyEditorFrame::BuildTransformMatrix(Ogre::Matrix4& Matrix,  const Ogre::Vector3& position, const Ogre::Quaternion rotate, const Ogre::Vector3 scale)
{

	Ogre::Matrix4 posMatrix;
	Ogre::Matrix4 scaleMatrix;
	Ogre::Matrix4 rotateMatrix(rotate);

	posMatrix = Ogre::Matrix4::IDENTITY;
	posMatrix.setTrans(position);

	scaleMatrix = Ogre::Matrix4::IDENTITY;
	scaleMatrix.setScale(scale);

	// 最终的变换矩阵.	
	Matrix = posMatrix * rotateMatrix * scaleMatrix;


}

bool Oculus::setupOgre(Ogre::SceneManager *sm, Ogre::RenderWindow *win, Ogre::SceneNode *parent)
{
	m_window = win;
	m_sceneManager = sm;
	Ogre::LogManager::getSingleton().logMessage("Oculus: Setting up Ogre");
	if(parent)
		m_cameraNode = parent->createChildSceneNode("StereoCameraNode");
	else
		m_cameraNode = sm->getRootSceneNode()->createChildSceneNode("StereoCameraNode");

	m_cameras[0] = sm->createCamera("CameraLeft");
	m_cameras[1] = sm->createCamera("CameraRight");
	
	Ogre::MaterialPtr matLeft = Ogre::MaterialManager::getSingleton().getByName("Ogre/Compositor/Oculus");
	Ogre::MaterialPtr matRight = matLeft->clone("Ogre/Compositor/Oculus/Right");
	Ogre::GpuProgramParametersSharedPtr pParamsLeft = matLeft->getTechnique(0)->getPass(0)->getFragmentProgramParameters();
	Ogre::GpuProgramParametersSharedPtr pParamsRight = matRight->getTechnique(0)->getPass(0)->getFragmentProgramParameters();
	Ogre::Vector4 hmdwarp;
	if(m_stereoConfig)
	{
		hmdwarp = Ogre::Vector4(m_stereoConfig->GetDistortionK(0),
								m_stereoConfig->GetDistortionK(1),
								m_stereoConfig->GetDistortionK(2),
								m_stereoConfig->GetDistortionK(3));
	}
	else
	{
		hmdwarp = Ogre::Vector4(g_defaultDistortion[0],
								g_defaultDistortion[1],
								g_defaultDistortion[2],
								g_defaultDistortion[3]);
	}
	pParamsLeft->setNamedConstant("HmdWarpParam", hmdwarp);
	pParamsRight->setNamedConstant("HmdWarpParam", hmdwarp);
	pParamsLeft->setNamedConstant("LensCentre", 0.5f+(m_stereoConfig->GetProjectionCenterOffset()/2.0f));
	pParamsRight->setNamedConstant("LensCentre", 0.5f-(m_stereoConfig->GetProjectionCenterOffset()/2.0f));

	Ogre::CompositorPtr comp = Ogre::CompositorManager::getSingleton().getByName("OculusRight");
	comp->getTechnique(0)->getOutputTargetPass()->getPass(0)->setMaterialName("Ogre/Compositor/Oculus/Right");

	for(int i=0;i<2;++i)
	{
		m_cameraNode->attachObject(m_cameras[i]);
		if(m_stereoConfig)
		{
			// Setup cameras.
			m_cameras[i]->setNearClipDistance(m_stereoConfig->GetEyeToScreenDistance());
			m_cameras[i]->setFarClipDistance(g_defaultFarClip);
			m_cameras[i]->setPosition((i * 2 - 1) * m_stereoConfig->GetIPD() * 0.5f, 0, 0);
			m_cameras[i]->setAspectRatio(m_stereoConfig->GetAspect());
			m_cameras[i]->setFOVy(Ogre::Radian(m_stereoConfig->GetYFOVRadians()));
			
			// Oculus requires offset projection, create a custom projection matrix
			Ogre::Matrix4 proj = Ogre::Matrix4::IDENTITY;
			float temp = m_stereoConfig->GetProjectionCenterOffset();
			proj.setTrans(Ogre::Vector3(-m_stereoConfig->GetProjectionCenterOffset() * (2 * i - 1), 0, 0));
			m_cameras[i]->setCustomProjectionMatrix(true, proj * m_cameras[i]->getProjectionMatrix());
		}
		else
		{
			m_cameras[i]->setNearClipDistance(g_defaultNearClip);
			m_cameras[i]->setFarClipDistance(g_defaultFarClip);
			m_cameras[i]->setPosition((i*2-1) * g_defaultIPD * 0.5f, 0, 0);
		}
		m_viewports[i] = win->addViewport(m_cameras[i], i, 0.5f*i, 0, 0.5f, 1.0f);
		m_viewports[i]->setBackgroundColour(g_defaultViewportColour);
		m_compositors[i] = Ogre::CompositorManager::getSingleton().addCompositor(m_viewports[i],i==0?"OculusLeft":"OculusRight");
		m_compositors[i]->setEnabled(true);
	}

	m_ogreReady = true;
	Ogre::LogManager::getSingleton().logMessage("Oculus: Oculus setup completed successfully");
	return true;
}