LLPointer<LLModel> LLMeshReduction::reduce(LLModel* in_model, F32 limit, S32 mode)
{
LLVertexBuffer::unbind();
// create vertex buffers from model
std::vector<LLPointer<LLVertexBuffer> > in_vertex_buffers;
create_vertex_buffers_from_model(in_model, in_vertex_buffers);
// create glod object from vertex buffers
stop_gloderror();
S32 glod_group = mCounter++;
S32 glod_object = mCounter++;
create_glod_object_from_vertex_buffers(glod_object, glod_group, in_vertex_buffers);
// set reduction parameters
stop_gloderror();
if (mode == TRIANGLE_BUDGET)
{
// triangle budget mode
glodGroupParameteri(glod_group, GLOD_ADAPT_MODE, GLOD_TRIANGLE_BUDGET);
stop_gloderror();
glodGroupParameteri(glod_group, GLOD_ERROR_MODE, GLOD_OBJECT_SPACE_ERROR);
stop_gloderror();
S32 triangle_count = (S32)limit;
glodGroupParameteri(glod_group, GLOD_MAX_TRIANGLES, triangle_count);
stop_gloderror();
}
else if (mode == ERROR_THRESHOLD)
{
// error threshold mode
glodGroupParameteri(glod_group, GLOD_ADAPT_MODE, GLOD_ERROR_THRESHOLD);
glodGroupParameteri(glod_group, GLOD_ERROR_MODE, GLOD_OBJECT_SPACE_ERROR);
F32 error_threshold = limit;
glodGroupParameterf(glod_group, GLOD_OBJECT_SPACE_ERROR_THRESHOLD, error_threshold);
stop_gloderror();
}
else
{
// not a legal mode
return NULL;
}
// do the reduction
glodAdaptGroup(glod_group);
stop_gloderror();
// convert glod object into vertex buffers
std::vector<LLPointer<LLVertexBuffer> > out_vertex_buffers;
create_vertex_buffers_from_glod_object(glod_object, glod_group, out_vertex_buffers);
// convert vertex buffers into a model
LLPointer<LLModel> out_model = create_model_from_vertex_buffers(out_vertex_buffers);
return out_model;
}
void LODSettings::apply( GLODMesh* p_lodmesh )
{
const LODSettings* p_ls = p_lodmesh->getLODSettings();
assert( p_ls && "invalid lod object" );
GLuint objectname = p_lodmesh->getObjectName();
//! TODO: should we replace the hardcoded params here by user-defined ones?
glodObjectParameteri( objectname, GLOD_BUILD_OPERATOR, GLOD_OPERATOR_EDGE_COLLAPSE );
glodObjectParameteri( objectname, GLOD_BUILD_ERROR_METRIC, GLOD_METRIC_SPHERES );
glodObjectParameteri( objectname, GLOD_BUILD_BORDER_MODE, GLOD_BORDER_LOCK );
glodObjectParameteri( objectname, GLOD_BUILD_QUEUE_MODE, GLOD_QUEUE_GREEDY );
glodGroupParameteri( objectname, GLOD_ADAPT_MODE, p_ls->getAdaptationMode() );
glodGroupParameteri( objectname, GLOD_ERROR_MODE, p_ls->getErrorMode() );
if ( p_ls->getAdaptationMode() == GLOD_ERROR_THRESHOLD )
glodGroupParameterf( objectname, p_ls->getErrorMode(), p_ls->getErrorThreshold() );
else // GLOD_TRIANGLE_BUDGET
glodGroupParameterf( objectname, p_ls->getErrorMode(), p_ls->getMaxTriangles() );
}
