text: /*
   * Copyright (C) 2015 Open Source Robotics Foundation
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   *
   */
  
  #include <ignition/common/Console.hh>
  
  #include "ignition/rendering/optix/OptixPrimitive.hh"
  #include "ignition/rendering/optix/OptixMaterial.hh"
  #include "ignition/rendering/optix/OptixScene.hh"
  
  using namespace ignition;
  using namespace rendering;
  
  //////////////////////////////////////////////////
  
  const std::string OptixPrimitive::PTX_INTERSECT_FUNC("Intersect");
  
  const std::string OptixPrimitive::PTX_BOUNDS_FUNC("Bounds");
  
  //////////////////////////////////////////////////
  OptixPrimitive::OptixPrimitive()
  {
  }
  
  //////////////////////////////////////////////////
  OptixPrimitive::~OptixPrimitive()
  {
  }
  
  //////////////////////////////////////////////////
  MaterialPtr OptixPrimitive::Material() const
  {
    return this->material;
  }
  
  //////////////////////////////////////////////////
  void OptixPrimitive::SetMaterial(MaterialPtr _material, bool unique)
  {
    // TODO: clean up
  
    if (!_material)
    {
      ignerr << "Cannot assign null material" << std::endl;
      return;
    }
  
    _material = (unique) ? _material->Clone() : _material;
  
    OptixMaterialPtr derived =
        std::dynamic_pointer_cast<OptixMaterial>(_material);
  
    if (!derived)
    {
      ignerr << "Cannot assign material created by another render-engine"
             << std::endl;
  
      return;
    }
  
    this->SetMaterialImpl(derived);
  }
  
  //////////////////////////////////////////////////
  optix::GeometryGroup OptixPrimitive::OptixGeometryGroup() const
  {
    return this->optixGeomGroup;
  }
  
  //////////////////////////////////////////////////
  void OptixPrimitive::PreRender()
  {
    OptixGeometry::PreRender();
    this->material->PreRender();
  }
  
  //////////////////////////////////////////////////
  optix::Acceleration OptixPrimitive::OptixAccel() const
  {
    return this->optixAccel;
  }
  
  //////////////////////////////////////////////////
  optix::GeometryInstance OptixPrimitive::OptixGeometryInstance() const
  {
    return this->optixGeomInstance;
  }
  
  //////////////////////////////////////////////////
  optix::Geometry OptixPrimitive::OptixGeometry() const
  {
    return this->optixGeometry;
  }
  
  //////////////////////////////////////////////////
  void OptixPrimitive::SetMaterialImpl(OptixMaterialPtr _material)
  {
    this->optixGeomInstance->setMaterialCount(0);
    this->optixGeomInstance->addMaterial(_material->Material());
    this->material = _material;
  }
  
  //////////////////////////////////////////////////
  void OptixPrimitive::Init()
  {
    OptixGeometry::Init();
    optix::Context optixContext = this->scene->OptixContext();
    this->optixGeomInstance = optixContext->createGeometryInstance();
    this->optixGeomInstance->setGeometry(this->optixGeometry);
    this->optixAccel = optixContext->createAcceleration("Bvh", "Bvh");
    this->optixGeomGroup = optixContext->createGeometryGroup();
    this->optixGeomGroup->addChild(this->optixGeomInstance);
    this->optixGeomGroup->setAcceleration(this->optixAccel);
  }
  
  //////////////////////////////////////////////////
  optix::Geometry OptixPrimitive::CreateOptixGeometry(OptixScenePtr _scene,
      const std::string &_ptxFile)
  {
    // create geometry programs
    optix::Program interProgram, boundsProgram;
    interProgram = _scene->CreateOptixProgram(_ptxFile, PTX_INTERSECT_FUNC);
    boundsProgram = _scene->CreateOptixProgram(_ptxFile, PTX_BOUNDS_FUNC);
  
    // create actual geometry
    optix::Context optixContext = _scene->OptixContext();
    optix::Geometry geometry = optixContext->createGeometry();
    geometry->setIntersectionProgram(interProgram);
    geometry->setBoundingBoxProgram(boundsProgram);
    geometry->setPrimitiveCount(1);
  
    return geometry;
  }
  