130 lines
4.1 KiB
C++
130 lines
4.1 KiB
C++
/*
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* Copyright (C) 2012 Open Source Robotics Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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#ifndef _AMBIENTLIGHT_HH_
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#define _AMBIENTLIGHT_HH_
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#include <OgreSimpleRenderable.h>
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#include "gazebo/rendering/deferred_shading/GeomUtils.hh"
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#include "gazebo/util/system.hh"
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namespace gazebo
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{
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namespace rendering
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{
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// Renderable for rendering Ambient component and also to
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// establish the depths
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// Just instantiation is sufficient
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// Note that instantiation is necessary to at least establish the depths
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// even if the current ambient colour is 0
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// its ambient colour is same as the scene's ambient colour
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// XXX Could make this a singleton/make it private to the
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// DeferredShadingSystem e.g.
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template<class techniquePolicy>
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class GZ_RENDERING_VISIBLE AmbientLight
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: public Ogre::SimpleRenderable, public techniquePolicy
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{
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/// \brief Constructor
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public: AmbientLight()
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{
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this->setRenderQueueGroup(Ogre::RENDER_QUEUE_2);
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this->mRenderOp.vertexData = new Ogre::VertexData();
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this->mRenderOp.indexData = 0;
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GeomUtils::CreateQuad(mRenderOp.vertexData);
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this->mRenderOp.operationType =
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Ogre::RenderOperation::OT_TRIANGLE_STRIP;
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this->mRenderOp.useIndexes = false;
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// Set bounding
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this->setBoundingBox(Ogre::AxisAlignedBox(-10000, -10000, -10000,
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10000, 10000, 10000));
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this->radius = 15000;
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this->matPtr = Ogre::MaterialManager::getSingleton().getByName(
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this->GetMaterialPrefix() + "/AmbientLight");
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if (this->matPtr.isNull())
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gzthrow("Is Null");
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this->matPtr->load();
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}
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/// \brief Destructor
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public: ~AmbientLight()
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{
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// need to release IndexData and vertexData created for renderable
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delete this->mRenderOp.indexData;
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delete this->mRenderOp.vertexData;
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}
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/// \copydoc MovableObject::getBoundingRadius
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public: virtual Ogre::Real getBoundingRadius(void) const
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{
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return this->radius;
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}
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/// \copydoc Renderable::getSquaredViewDepth
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public: virtual Ogre::Real getSquaredViewDepth(const Ogre::Camera*) const
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{
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return 0.0;
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}
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/// \copydoc Renderable::getMaterial
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public: virtual const Ogre::MaterialPtr &getMaterial(void) const
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{
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return this->matPtr;
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}
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public: virtual void getWorldTransforms(Ogre::Matrix4 *_xform) const
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{
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*_xform = Ogre::Matrix4::IDENTITY;
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}
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public: void UpdateFromCamera(Ogre::Camera *_camera)
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{
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Ogre::Technique* tech = this->getMaterial()->getBestTechnique();
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Ogre::Vector3 farCorner = _camera->getViewMatrix(true) *
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_camera->getWorldSpaceCorners()[4];
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for (uint16_t i = 0; i < tech->getNumPasses(); ++i)
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{
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Ogre::Pass *pass = tech->getPass(i);
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// get the vertex shader parameters
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Ogre::GpuProgramParametersSharedPtr params =
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pass->getVertexProgramParameters();
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// set the camera's far-top-right corner
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if (params->_findNamedConstantDefinition("farCorner"))
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params->setNamedConstant("farCorner", farCorner);
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params = pass->getFragmentProgramParameters();
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if (params->_findNamedConstantDefinition("farCorner"))
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params->setNamedConstant("farCorner", farCorner);
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}
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}
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protected: Ogre::Real radius;
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protected: Ogre::MaterialPtr matPtr;
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};
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}
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}
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#endif
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