Distributed under the LGPL
*/
+#include "buffer.h"
#include "mesh.h"
using namespace std;
namespace GL {
Mesh::Mesh():
- vertices(NODATA)
+ vertices(VERTEX3),
+ ibuf(0)
+{ }
+
+Mesh::Mesh(const VertexFormat &f):
+ vertices(f),
+ ibuf(0)
+{ }
+
+void Mesh::use_vertex_buffer(bool b)
+{
+ if(b)
+ {
+ vertices.use_vertex_buffer();
+ if(!ibuf)
+ ibuf=new Buffer(ELEMENT_ARRAY_BUFFER);
+ update_index_buffer();
+ }
+ else
+ {
+ vertices.use_vertex_buffer(0);
+ delete ibuf;
+ ibuf=0;
+ }
+}
+
+float *Mesh::get_vertex(unsigned i)
{
- vertices.use_vertex_buffer();
+ return vertices[i];
+}
+
+void Mesh::add_batch(const Batch &b)
+{
+ batches.push_back(b);
+ update_index_buffer();
+}
+
+void Mesh::clear()
+{
+ vertices.clear();
+ batches.clear();
}
void Mesh::draw() const
{
vertices.apply();
+ if(ibuf)
+ {
+ ibuf->bind();
+ unsigned offset=0;
+ for(list<Batch>::const_iterator i=batches.begin(); i!=batches.end(); ++i)
+ {
+ i->draw_with_buffer(offset);
+ offset+=i->size();
+ }
+ ibuf->unbind();
+ }
+ else
+ {
+ for(list<Batch>::const_iterator i=batches.begin(); i!=batches.end(); ++i)
+ i->draw();
+ }
+}
+
+void Mesh::update_index_buffer()
+{
+ if(!ibuf)
+ return;
+
+ unsigned total=0;
+ for(list<Batch>::const_iterator i=batches.begin(); i!=batches.end(); ++i)
+ total+=i->size();
+
+ ibuf->data(total*sizeof(unsigned), 0);
+ unsigned offset=0;
for(list<Batch>::const_iterator i=batches.begin(); i!=batches.end(); ++i)
- i->draw();
+ {
+ ibuf->sub_data(offset*sizeof(unsigned), i->size()*sizeof(unsigned), &i->get_indices()[0]);
+ offset+=i->size();
+ }
+ ibuf->unbind();
}