RenderMan & RISpec, Nesting context rules ?

1. Inline Rules or Paragraph Rules in Corel Draw

2. nesting FX states

I'm reading a presentation from GDC 2004 on using effect files.  It suggests
to nest fx files so that common states can be moved out of inner loops.

So what I have done, in addition to my other fx files, I have one global fx
file, which stores seldomly changed states and global parameters.  However,
when I change a state it does not get updated:

globalFX->SetInt(hCullMode, cull);
globalFX->CommitChanges();

DrawStuff();

This is, of course, enclosed in a Begin, BeginPass, ..., EndPass, End block,
where hCullMode is a handle to the fx parameter gCullMode, which sets the
cullmode render state in pass 0:
extern uniform DWORD gCullMode;

technique GlobalFXTech
{
pass P0
{
// States
CullMode = <gCullMode>;
[...]

However, CommitChanges is not updating the render state!  On the other hand,
if I modify the state directly, it does work:


gDevice->SetRenderState(D3DRS_CULLMODE, D3DCULL_NONE);

DrawStuff();

So why isn't CommitChanges working!?

3. nested transformations?

5. [Q] Polygon hierarchy, consistant orientation, nesting, sweepline algo.

6. nested if statements

Hi,

is it possible to nest if statements in gnuplot?

the help seems to cover only

 if <> else if <> else

what I need is a fuller

 if <> if <> else <> else <>



If there this is not supported then maybe the help could be more
explicit.

Are there any tricks to over come this , assumed, short coming?

TIA.

7. nested if then else

8. Scrambled graphics with nested buffered components at custom GUI

Hi,
I have implemented a custom GUI library with buffered components.
I used EvC 4.0 (SP4) and this library did work very well, while
compiled for a WinCE 4.2 system. After an Upgrade to WinCE 5.0,
the component's graphics get randomly scrambled and sometimes
disappear at all. I already found a quick fix (by using DIB's instead of 
DDB's),
but with the DIB's, text antialiasing doesn't work anymore, so this isn't 
really
an acceptable solution. Unfortunately the problem is a little complex, so I 
will
post the 4 related methods and their dependencies in the following (left out
as much unimportant stuff as possible).

Actually I was used to code in java, so maybe I just screwed up using
the structures in a miserable way. I really hope someone can help me out.

Thomas


Wnd::OnPaint()
{
    CPaintDC dc = CPaintDC(this);
    DrawChildren(&dc);
    ...
}

DrawChildren(CDC* dc)
{
    // initialize
    CDC memDC;
    HBITMAP offscreenBmp;
    HGDIOBJ oldObj;

    memDC.CreateCompatibleDC(dc);
    offscreenBmp = CreateCompatibleBitmap(dc->GetSafeHdc(),...);
    oldObj = memDC.SelectObject(offscreenBmp);

    // draw the children
    for(...)
    {
        curChild->DrawElement(&memDC);
    }

    // BitBlt memDC into dc
    dc->BitBlt(...,&memDC,...)

    // cleanup
    memDC.SelectObject(oldObj);
    memDC.DeleteDC();
    DeleteObject(offscreenBmp);
}

DrawElement(CDC* dc)
{
    // initialize
    CDC memDC;
    CBitmap* bmp;
    CBitmap* oldBmp;

    memDC.CreateCompatibleDC(dc);
    if (IsCached(...))
    {
        // the cached CBitmaps are stored in a map
        bmp = GetCachedBitmap(...)
    }else{
        bmp = CreateCachedBitmap()
        if(HasChildren(...)
        {
            // recursive call of above function
            DrawChildren(&memDC);
        }else{
            // simply paint the component into the memDC
            FinallyDrawElement(&memDC);
        }
    }
    oldBmp = memDC.SelectObject(bmp);

    // BitBlt nested DC into parent DC
    dc->BitBlt(...,&memDC,...)

    // clean up
    memDC.SelectObject(oldBmp);
    memDC.DeleteDC();
}

CreateCachedBitmap()
{
    HDC hDC = ::GetDC(AfxGetMainWnd()->GetSafeHwnd());
    HBITMAP myBmp = CreateCompatibleBitmap(hDC, ...);
    // This was my quick fix: HBITMAP myBmp = CreateDIBSection(hDC,...);
    ReleaseDC(NULL, hDC);
    SetCached(true);
}