GlutDrawer.cpp

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#include "GlutDrawer.h"
#include "MT_assert.h"

MEM_SmartPtr<GlutDrawManager> GlutDrawManager::m_s_instance = MEM_SmartPtr<GlutDrawManager>();

    GlutDrawManager *
GlutDrawManager::
Instance(
){
    if (m_s_instance == NULL) {
        m_s_instance = new GlutDrawManager();
    }

    return m_s_instance;
}


// this is the function you should pass to glut

    void
GlutDrawManager::
Draw(
){
    GlutDrawManager *manager = GlutDrawManager::Instance();

    if (manager->m_drawer != NULL) {
        manager->m_drawer->Draw();
    }
}

    void
GlutDrawManager::
InstallDrawer(
    GlutDrawer * drawer
){

    MT_assert(m_drawer == NULL);
    m_drawer = drawer;
}

    void
GlutDrawManager::
ReleaseDrawer(
){
    m_drawer = NULL;
}


GlutDrawManager::
~GlutDrawManager(
){

    delete(m_drawer);
}