Writing Viewhints

[Stefan H. <st...@to...>]

I have tried to improve writing viewhints.

1. I have partly rewritten
   E3IOData.c: e3viewhints_new (see below)
in order to
- always initialize all variables properly
- support ImageDimensions
- correctly write the default attribute set of the view

2. A few lines have been changed in
   E3FFW_3DMFBin_Writer: e3ffw_3DMF_write_objects, line 541... (see below)
in order to support 3DMF v1.6 compability of the light data
(see mail Roger Holmes, Re: Lights I/O, 23.06.2005)

The recently released Geo3D X 2.5.2b1 (http://www.topoi.ch) includes 
the modified viewhint behaviour. The written viewhints are exacly the 
same as under QD3D (with only one exception: Quesa IR and WR 
renderers do not write themselves out).

Stefan

________________________________________
E3IOData.c: e3viewhints_new
________________________________________
TQ3Status
e3viewhints_new ( E3ViewHints* theObject, void *privateData, const 
void *paramData )
	{
	// Initialise our instance data

#pragma unused(privateData)

	// initialize the draw context related data here because 
Q3View_GetDrawContext could fail
	theObject->clearMethod = kQ3ClearMethodNone  ;
	Q3ColorARGB_Set ( &theObject->clearImageColor, 1.0f, 1.0f, 
1.0f, 1.0f ) ;
	theObject->isValidSetMaskState = kQ3False ;

	theObject->isValidSetDimensions = kQ3False ;
	theObject->widthDimensions = 0 ;
	theObject->heightDimensions = 0 ;

	if ( paramData )
		{
		const TQ3ViewObject theView = (const TQ3ViewObject) paramData ;

		Q3View_GetRenderer ( theView , &theObject->renderer ) ;
		Q3View_GetCamera ( theView , &theObject->camera ) ;
		Q3View_GetLightGroup ( theView , &theObject->lightGroup ) ;
		Q3View_GetDefaultAttributeSet ( theView , 
&theObject->attributeSet ) ;

		TQ3DrawContextObject drawContext ;
		if ( Q3View_GetDrawContext ( theView , &drawContext ) 
!= kQ3Failure )
			{
			Q3DrawContext_GetClearImageMethod ( 
drawContext , &theObject->clearMethod ) ;
			Q3DrawContext_GetClearImageColor ( 
drawContext , &theObject->clearImageColor ) ;
			theObject->isValidSetMaskState = ( 
Q3DrawContext_GetMask ( drawContext , &theObject->mask ) != 
kQ3Failure ) ? kQ3True : kQ3False ;

			Q3DrawContext_GetPaneState (drawContext, 
&theObject->isValidSetDimensions) ;
			TQ3Area area ;
			Q3DrawContext_GetPane (drawContext, &area) ;
			theObject->widthDimensions  = area.max.x - area.min.x ;
			theObject->heightDimensions = area.max.y - area.min.y ;
			}
		}
	else
		{
		theObject->renderer = NULL ;
		theObject->camera = NULL ;
		theObject->lightGroup = NULL ;
		theObject->attributeSet = NULL ;
		}

	// currently not supported
	theObject->mask.image = NULL ;
	theObject->mask.width = 0 ;
	theObject->mask.height = 0 ;
	theObject->mask.rowBytes = 0 ;
	theObject->mask.bitOrder = kQ3EndianBig ;

	return kQ3Success ;
	}


________________________________________
E3FFW_3DMFBin_Writer: e3ffw_3DMF_write_objects, line 541...
________________________________________

if(qd3dStatus == kQ3Success)
{
	if ( instanceData->stack[i].objectType == kQ3LightData )
		qd3dStatus = Q3Uns32_Write ( kQ3ShapeTypeLight, theFile ) ;
	else
		qd3dStatus = 
Q3Uns32_Write(instanceData->stack[i].objectType,theFile);
}