Render into picture viewer without VolumeData

Helper

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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED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

Helper

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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED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

Helper

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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED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

Helper

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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED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;   
}

Helper

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