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/************************************************************************
*
* Copyright (C) 2014-2023 IRCAD France
* Copyright (C) 2014-2020 IHU Strasbourg
*
* This file is part of Sight.
*
* Sight is free software: you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Sight is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Sight. If not, see <https://www.gnu.org/licenses/>.
*
***********************************************************************/
#include "viz/scene3d/factory/r2vb_renderable.hpp"
#include "viz/scene3d/r2vb_renderable.hpp"
#include <viz/scene3d/ogre.hpp>
#include <OGRE/OgreMaterialManager.h>
#include <OGRE/OgreRenderQueue.h>
namespace sight::viz::scene3d
{
//-----------------------------------------------------------------------------
viz::scene3d::r2vb_renderable* viz::scene3d::r2vb_renderable::make(
const std::string& _name,
Ogre::SubEntity* _source_object,
Ogre::SceneManager* _scene_manager,
data::mesh::cell_type_t _primitive_type,
const std::string& _mtl_name
)
{
const auto& factory_name = viz::scene3d::factory::r2vb_renderable::s_factory_type_name;
auto* instance = static_cast<viz::scene3d::r2vb_renderable*>
(_scene_manager->createMovableObject(_name, factory_name));
instance->m_input_primitive_type = _primitive_type;
instance->m_src_object = _source_object;
instance->mManager = _scene_manager;
// Input material name
Ogre::MaterialPtr mat = Ogre::MaterialManager::getSingleton().getByName(_mtl_name, RESOURCE_GROUP);
instance->setMaterial(mat);
return instance;
}
//-----------------------------------------------------------------------------
viz::scene3d::r2vb_renderable::r2vb_renderable(const Ogre::String& _name) :
SimpleRenderable(_name)
{
}
//-----------------------------------------------------------------------------
void viz::scene3d::r2vb_renderable::set_output_settings(
std::size_t _vertex_count,
bool _has_color,
bool _has_tex_coord,
bool _has_normals
)
{
if(m_max_output_vertex_count < _vertex_count)
{
const std::string r2vb_material = (m_r2vb_buffer) ? m_r2vb_buffer->getRenderToBufferMaterial()->getName() : "";
m_r2vb_buffer = Ogre::HardwareBufferManager::getSingleton().createRenderToVertexBuffer();
m_r2vb_buffer->setOperationType(Ogre::RenderOperation::OT_TRIANGLE_LIST);
m_r2vb_buffer->setResetsEveryUpdate(true);
const std::size_t num_vertices = m_input_primitive_type == data::mesh::cell_type_t::quad ? _vertex_count * 2
:
m_input_primitive_type
== data::mesh::cell_type_t::tetra ? _vertex_count * 4
:
_vertex_count;
m_r2vb_buffer->setMaxVertexCount(static_cast<unsigned int>(num_vertices));
m_r2vb_buffer->setSourceRenderable(m_src_object);
if(!r2vb_material.empty())
{
m_r2vb_buffer->setRenderToBufferMaterialName(r2vb_material);
}
m_max_output_vertex_count = _vertex_count;
}
// Define feedback vertex declarations
Ogre::VertexDeclaration* vtx_decl = m_r2vb_buffer->getVertexDeclaration();
vtx_decl->removeAllElements();
std::size_t ofst = 0;
ofst += vtx_decl->addElement(0, ofst, Ogre::VET_FLOAT3, Ogre::VES_POSITION).getSize();
if(_has_normals)
{
ofst += vtx_decl->addElement(0, ofst, Ogre::VET_FLOAT3, Ogre::VES_NORMAL).getSize();
}
if(_has_color)
{
ofst += vtx_decl->addElement(0, ofst, Ogre::VET_COLOUR, Ogre::VES_DIFFUSE).getSize();
}
if(_has_tex_coord)
{
vtx_decl->addElement(0, ofst, Ogre::VET_FLOAT2, Ogre::VES_TEXTURE_COORDINATES).getSize();
}
// Set bounds.
this->setBoundingBox(m_src_object->getParent()->getBoundingBox());
this->set_dirty();
}
//-----------------------------------------------------------------------------
const Ogre::String& r2vb_renderable::getMovableType() const
{
return factory::r2vb_renderable::s_factory_type_name;
}
//-----------------------------------------------------------------------------
void r2vb_renderable::_updateRenderQueue(Ogre::RenderQueue* _queue)
{
// Don't do anything if the object is not visible
if(m_src_object->getParent()->isVisible())
{
// Update the ouput vertex buffer only if the dirty flag is set
if(m_dirty)
{
m_r2vb_buffer->update(mManager);
m_dirty = false;
}
// Add the output vertex buffer in the render queue
_queue->addRenderable(this, mRenderQueueID, mRenderQueuePriority);
}
}
//-----------------------------------------------------------------------------
void r2vb_renderable::getRenderOperation(Ogre::RenderOperation& _op)
{
m_r2vb_buffer->getRenderOperation(_op);
}
//------------------------------------------------------------------------------
const Ogre::MeshPtr& r2vb_renderable::get_mesh() const
{
return m_src_object->getParent()->getMesh();
}
//-----------------------------------------------------------------------------
} // namespace sight::viz::scene3d
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