/******************************************************************************\

        Module:     IRS_Update.c                                            

        Purpose:    update metahandler functions                                

        Author:     Sun-Inn Shih                                        

        Copyright (C) 1993-96 Apple Computer, Inc.  All rights reserved.    

\*****************************************************************************/

#include <QD3D.h>

#include <QD3DDrawContext.h>

#include <QD3DView.h>

#include "IRS_Update.h"

/*

 *  IRS_Update_Matrix_localToFrustum

 */

TQ3Status IRS_Update_Matrix_localToFrustum(

                                            TQ3ViewObject           pView,

                                            irsData                 *irsdata,

                                            TQ3Matrix4x4            *pData)

    {

    irsdata->localToFrustum = *pData;

    irsdata->XScale = 1.0f ;

    irsdata->YScale = 1.0f ;

    irsdata->XOffset = 0 ;

    irsdata->YOffset = 0 ;

    TQ3DrawContextObject DrawContext ;

    if ( Q3View_GetDrawContext ( pView , &DrawContext ) != kQ3Failure )

        {

        TQ3DrawContextData Data ;

        if ( Q3DrawContext_GetData ( DrawContext , &Data ) != kQ3Failure )

            {

            irsdata->XScale = ( Data.pane.max.x - Data.pane.min.x ) / 2.0f ;

            irsdata->YScale = ( Data.pane.max.y - Data.pane.min.y ) / 2.0f ;

            irsdata->XOffset = Data.pane.min.x + irsdata->XScale ;

            irsdata->YOffset = Data.pane.max.y - irsdata->YScale ;

            }

        }

    return kQ3Success;

    }