Hi, everyone，
I applied by this way, does anyone have any more good idea?
Code:
class MyDrawable : public osg::Drawable
{
public:
MyDrawable() {}
/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
MySmokeDrawable(const MyDrawable& MyDrawable,const osg::CopyOp&
copyop=osg::CopyOp::SHALLOW_COPY):
osg::Drawable(MyDrawable,copyop) {}
META_Object(MyApp,MyDrawable)
virtual void drawImplementation(osg::RenderInfo& renderInfo) const
{
osg::State* state = renderInfo.getState();
state->disableAllVertexArrays();
const osg::Drawable::Extensions* glExt =
osg::Drawable::getExtensions(state->getContextID(), true);
//vbo create.....
glExt->glGenBuffers(1, &vboID);
glExt->glBindBuffer(GL_ARRAY_BUFFER_ARB, vboID);
glExt->glBufferData(GL_ARRAY_BUFFER_ARB, sizeof(Vertex)*24,
NULL, GL_DYNAMIC_DRAW );
glExt->glBufferSubData(GL_ARRAY_BUFFER_ARB, 0,
sizeof(Vertex)*24, verts);
state->setTexCoordPointer(0, 2, GL_FLOAT, sizeof(Vertex),
BUFFER_OFFSET(12));
state->setNormalPointer(GL_FLOAT, sizeof(Vertex),
BUFFER_OFFSET(20));
state->setColorPointer(4, GL_FLOAT, sizeof(Vertex),
BUFFER_OFFSET(32));
state->setVertexPointer(3, GL_FLOAT, sizeof(Vertex),
BUFFER_OFFSET(0));
glExt->glGenBuffers(1, &indexVBOID);
glExt->glBindBuffer(GL_ELEMENT_ARRAY_BUFFER_ARB, indexVBOID);
glExt->glBufferData(GL_ELEMENT_ARRAY_BUFFER_ARB,
36*sizeof(GLubyte), index, GL_STATIC_DRAW);
// glGenBuffers(1, &vboID); // Create the buffer ID, this is
basically the same as generating texture ID's
// glBindBuffer(GL_ARRAY_BUFFER, vboID); // Bind the buffer
(vertex array data)
//
// glBufferData(GL_ARRAY_BUFFER, sizeof(Vertex) * 24, NULL,
GL_DYNAMIC_DRAW);
// glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(Vertex) * 24, verts);
//
//
// glTexCoordPointer(2, GL_FLOAT, sizeof(Vertex),
BUFFER_OFFSET(12));
// glNormalPointer(GL_FLOAT, sizeof(Vertex), BUFFER_OFFSET(20));
// glColorPointer(4, GL_FLOAT, sizeof(Vertex), BUFFER_OFFSET(32));
// glVertexPointer(3, GL_FLOAT, sizeof(Vertex), BUFFER_OFFSET(0));
//
//
// glGenBuffers(1, &indexVBOID); // Generate buffer
// glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexVBOID); // Bind the
element array buffer
// glBufferData(GL_ELEMENT_ARRAY_BUFFER, 36 * sizeof(GLubyte),
index, GL_STATIC_DRAW);
//create done........do anything you want
...
...
}
}
such as :osg::geometry::useservertexbufferobject(true). and then specify the
vbo no. or get the vbo no. from the geometry?
thank you for any reply!
...
Thank you!
Cheers,
Ivan
Code:
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=39231#39231
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