135 lines
4.8 KiB
C++
135 lines
4.8 KiB
C++
/* OpenSceneGraph example, osgpersistentbufferstorage
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
/* file: examples/osgpersistentbufferstorage/osgpersistentbufferstorage.cpp
|
|
* author: Julien Valentin 2020-10-01
|
|
* copyright: (C) 2013
|
|
* license: OpenSceneGraph Public License (OSGPL)
|
|
*
|
|
* A test of BufferStorage and PersistantBufferStorage features
|
|
*
|
|
*/
|
|
|
|
|
|
#include <osg/GL2Extensions>
|
|
#include <osg/Notify>
|
|
#include <osg/ref_ptr>
|
|
#include <osg/Geode>
|
|
#include <osg/Geometry>
|
|
#include <osg/Point>
|
|
#include <osg/Vec3>
|
|
#include <osg/Vec4>
|
|
#include <osg/Program>
|
|
#include <osg/Shader>
|
|
#include <osg/BlendFunc>
|
|
|
|
#include <osg/Uniform>
|
|
#include <osgViewer/Viewer>
|
|
|
|
#include <osg/BufferIndexBinding>
|
|
|
|
#include <iostream>
|
|
|
|
///////////////////////////////////////////////////////////////////////////
|
|
|
|
class SineAnimation: public osg::Camera::DrawCallback
|
|
{
|
|
public:
|
|
SineAnimation(osg::Vec4Array* dyn, float scale = 1.0f, float offset = 0.0f ) :
|
|
_dyn(dyn),_rate(0), _scale(scale), _offset(offset)
|
|
{}
|
|
|
|
void operator()(osg::RenderInfo& renderInfo) const
|
|
{
|
|
unsigned int contextId = renderInfo.getContextID();
|
|
osg::GLBufferObject * glbo = _dyn->getBufferObject()->getOrCreateGLBufferObject(contextId);
|
|
glbo->bindBuffer();
|
|
GLfloat * data=(GLfloat*)glbo->_persistentDMA+glbo->getOffset(_dyn->getBufferIndex());
|
|
if(data)
|
|
{
|
|
_rate+=0.01;
|
|
float angle = _rate ;
|
|
float value = sinf( angle ) * _scale + _offset;
|
|
for(int i=0; i<4; i++) {
|
|
data[i*4+0]=float(i)*0.25*value;
|
|
}
|
|
glbo->commitDMA(_dyn->getBufferIndex());
|
|
}
|
|
}
|
|
|
|
private:
|
|
osg::ref_ptr<osg::Vec4Array> _dyn;
|
|
mutable float _rate;
|
|
const float _scale;
|
|
const float _offset;
|
|
};
|
|
|
|
|
|
///////////////////////////////////////////////////////////////////////////
|
|
|
|
int main( int, char** )
|
|
{
|
|
osg::Camera* root=new osg::Camera;
|
|
/// a first geom to demonstrate how to use usage to enable immutable buffer storage
|
|
{
|
|
osg::Vec4Array* vAry = new osg::Vec4Array;
|
|
vAry->push_back( osg::Vec4(2,0,0,1) );
|
|
vAry->push_back( osg::Vec4(2,1,0,1) );
|
|
vAry->push_back( osg::Vec4(3,0,0,1) );
|
|
vAry->push_back( osg::Vec4(3,1,0,1 ));
|
|
osg::VertexBufferObject*vbo = new osg::VertexBufferObject;
|
|
vbo->setUsage(GL_MAP_WRITE_BIT);//enable bufferStorage
|
|
vbo->setMappingBitfield(GL_MAP_WRITE_BIT);//set mapping flags
|
|
vAry->setBufferObject(vbo);
|
|
osg::Geometry * geom=new osg::Geometry;
|
|
geom->setUseDisplayList(false);
|
|
geom->setUseVertexBufferObjects(true);
|
|
geom->setVertexArray( vAry );
|
|
geom->addPrimitiveSet( new osg::DrawArrays( GL_LINES, 0, vAry->size() ) );
|
|
root->addChild(geom);
|
|
}
|
|
|
|
//second geometry buffer is persistent mapped and modified in camera callback
|
|
{
|
|
osg::Vec4Array* vAry = new osg::Vec4Array;
|
|
vAry->setDataVariance(osg::Object::STATIC);
|
|
vAry->push_back( osg::Vec4(0,0,0,1) );
|
|
vAry->push_back( osg::Vec4(0,1,0,1) );
|
|
vAry->push_back( osg::Vec4(1,0,0,1) );
|
|
vAry->push_back( osg::Vec4(1,1,0,1 ));
|
|
osg::VertexBufferObject*vbo = new osg::VertexBufferObject;
|
|
vbo->setDataVariance(osg::Object::STATIC);
|
|
vbo->setUsage(GL_MAP_WRITE_BIT | GL_MAP_PERSISTENT_BIT );//enable persistant bufferStorage
|
|
vbo->setMappingBitfield(GL_MAP_WRITE_BIT | GL_MAP_PERSISTENT_BIT| GL_MAP_FLUSH_EXPLICIT_BIT );//set mapping flags
|
|
|
|
vAry->setBufferObject(vbo);
|
|
osg::Geometry * geom=new osg::Geometry;
|
|
|
|
geom->setUseDisplayList(false);
|
|
geom->setUseVertexBufferObjects(true);
|
|
geom->setVertexArray( vAry );
|
|
geom->addPrimitiveSet( new osg::DrawArrays( GL_QUADS, 0, vAry->size() ) );
|
|
root->addChild(geom);
|
|
|
|
root->addPostDrawCallback(new SineAnimation(vAry));
|
|
}
|
|
osgViewer::Viewer viewer;
|
|
viewer.setSceneData( root );
|
|
return viewer.run();
|
|
}
|