Render into picture viewer without VolumeData

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 26/01/2012 at 03:15, xxxxxxxx wrote:

User Information:
Cinema 4D Version:   13 
Platform:   Windows  ;   Mac OSX  ; 
Language(s) :     C++  ;

---------
Hi all,

As far as I know it's is possible to create a VideoPostData that is an external renderer and calls VolumeData::SkipRenderingProcess() in VideoPostData::Execute() at the stages VIDEOPOSTCALL_RENDER and VIDEOPOSTCALL_INNER. I have done some experiments and everything seems to work as advertised.

Unfortunately then, the C4D renderer has already created a duplicate of the document and built a VolumeData including the render geometry and acceleration structures. As I don't need that data it just uses up memory.

-> Is there a way to be able to render using the picture viewer, but without the creation of the render geometry?

Many thanks in advance. Cheers,
Marcus

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 26/01/2012 at 03:33, xxxxxxxx wrote:

The docs say this:

VIDEOPOSTCALL_RENDER - Render precalculation. VolumeData not yet completly accessible.

My interpretation is that if SkipRenderProcess() is called at VIDEOPOSTCALL_RENDER, this will prevent the VolumeData from being built. I'm relying on that behaviour for one of my plugins, but maybe I should check this again :-).

Best regards
/Filip

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 26/01/2012 at 16:44, xxxxxxxx wrote:

Thanks for the reply. That's what I thought first, too. But it shows, that the memory consumpton goes up quite a bit. So I had a closer look:

VolumeData::GetObjCount() already returns the correct number of objects, accumulating the polygon count, also returns the total number and you can even do ray intersection tests.

I think the only thing that is not done is the setup of the shaders, but I may be wrong here, too.

Cheers,
Marcus

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 26/01/2012 at 21:33, xxxxxxxx wrote:

Ok, I can answer my question myself: The code below "renders" a checker board into the picture viewer without creating a VolumeData.

By the way, the document pointed to by "vps->doc" is a copy of the scene document.

Cheers,
Marcus

  
RENDERRESULT ExternalRenderer::Execute(BaseVideoPost*   node,   
                                       VideoPostStruct* vps)   
{   
    if (vps && vps->render)   
    {   
        Render* render = vps->render;   
        VPBuffer* buffer= render->GetBuffer(VPBUFFER_RGBA, 0);   
        LONG width = buffer->GetBw();   
        LONG height = buffer->GetBh();   
        SReal *lineBuffer = bNew SReal[width * 4];   
        for (LONG row = 0; row < height; ++row)   
        {   
            if (row % 10 == 0)   
            {   
               for (LONG col = 0; col < width; ++col)   
               {   
                    if (((row / 10) & 1) ^ ((col / 10) & 1))   
                    {   
                        lineBuffer[col*4]   = 0.55;   
                        lineBuffer[col*4+1] = 0.55;   
                        lineBuffer[col*4+2] = 0.55;   
                        lineBuffer[col*4+3] = 0.55;   
                    }   
                    else   
                    {   
                        lineBuffer[col*4]   = 0.45;   
                        lineBuffer[col*4+1] = 0.45;   
                        lineBuffer[col*4+2] = 0.45;   
                        lineBuffer[col*4+3] = 0.45;   
                    }   
               }   
            }   
            buffer->SetLine(0, row, width, lineBuffer, 32, false);   
            GeSleep(10);   
        }   
        bDelete(lineBuffer);   
        return RENDERRESULT_USERBREAK;   
    }   
  
    return RENDERRESULT_OK;   
}   

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 27/01/2012 at 01:24, xxxxxxxx wrote:

Unfortunately animation rendering doesn't relly work with this method since we stop during the first frame. -> All the nice animation functionality of the picture viewer becomes unavailable

If someone knows a better way, please let me know.

Thanks,
Marcus