DepthSorter.cpp

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// Copyright (C) 2005 Dave Griffiths
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

#include "DepthSorter.h"

using namespace Fluxus;

DepthSorter::DepthSorter()
{
}

DepthSorter::~DepthSorter()
{
}

void DepthSorter::Clear()
{
    m_RenderList.clear();
}

void DepthSorter::Add(const dMatrix &globaltransform, Primitive *prim, int id)
{
    Item item;
    item.Prim=prim;
    item.GlobalTransform=globaltransform;
    item.ID=id;
    
    dMatrix all=globaltransform*prim->GetState()->Transform;
    dVector pos=all.transform(dVector(0,0,0));
    item.Depth=pos.z;
    m_RenderList.push_back(item);
}

void DepthSorter::Render()
{
    m_RenderList.sort();

    for(list<Item>::iterator i=m_RenderList.begin(); i!=m_RenderList.end(); i++)
    {
        glPushMatrix(); 
        glPushName(i->ID);
        glLoadIdentity();
        glMultMatrixf(i->GlobalTransform.arr());
        i->Prim->ApplyState();
        i->Prim->Prerender();
        i->Prim->Render();
        glPopName();
        glPopMatrix();
    }
}

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