THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED
On 10/08/2012 at 09:20, xxxxxxxx wrote:
Hi Robert,
here is the code I use times ago in my DiTools.
Not sure if it still work well in current C4D version.
Please let me know if you find some Problem with it.
Also the trick with MIP could work I think.
#ifndef _SAMPLER_REMO_H_
#define _SAMPLER_REMO_H_
//=================================================================================================
// Remotion (Igor Schulz) 2003 - 2012
// BaseMaterial/Shader Sampler for C4D
// First Created:: 17.12.03
//=================================================================================================
#include "c4d_raytrace.h"
//=================================================================================================
class Sampler
//=================================================================================================
{
public:
Sampler();
~Sampler();
LONG Init(BaseMaterial *mat ,LONG chnr,Real time,BaseDocument *doc,BaseObject *op=NULL);
LONG Init(TextureTag *textag,LONG chnr,Real time,BaseDocument *doc,BaseObject *op=NULL);
inline Bool IsInit(){ return TexInit; };
Vector SampleUV(const Vector &uv, Real time=0.0);
Vector Sample3D(const Vector &p = 0.0, const Vector &uv = 0.0, Real time=0.0);
void Free();
private:
BaseShader *texShader;
TexData *tex;
RayObject *rop;
InitRenderStruct *irs;
ChannelData cd;
Matrix omg;
Real offsetX;
Real offsetY;
Real lenX;
Real lenY;
Bool TexInit;
};
//-------------------------------------------------------------------------------------------------
inline Vector Sampler::SampleUV(const Vector &uv, Real time)
{
cd.t = time;
cd.p = uv;
cd.p.x = (uv.x-offsetX) / lenX;
cd.p.y = (uv.y-offsetY) / lenY;
return texShader->Sample(&cd);
}
//-------------------------------------------------------------------------------------------------
inline Vector Sampler::Sample3D(const Vector &p, const Vector &uv, Real time)
{
cd.t = time;
cd.vd->p = p;
cd.vd->back_p = p;
cd.p = uv;
return texShader->Sample(&cd);
}
//-------------------------------------------------------------------------------------------------
inline LONG Sampler::Init(TextureTag *textag,LONG chnr,Real time,BaseDocument *doc,BaseObject *op)
{
if(!textag) return 1;
BaseMaterial *mat = textag->GetMaterial();if(!mat) return 2;//no Material
return Init(mat,chnr,time,doc,op);
}
//-------------------------------------------------------------------------------------------------
LONG Sampler::Init(BaseMaterial *mat,LONG chnr, Real time,BaseDocument *doc, BaseObject *op)
{
if (!doc || !mat || chnr < 0 || chnr > 12) return 1;
if (!cd.vd || !tex || !irs || !rop) return 2;
TexInit = FALSE;
LONG err = 0;
BaseContainer chandata;
LONG fps = doc->GetFps();
Filename dpath = doc->GetDocumentPath();
BaseChannel *texChan1 = mat->GetChannel(chnr); if (!texChan1) return 3;//no Channel
texShader = texChan1->GetShader(); if(!texShader) return 4;
if (op){ //Object
rop->link = op;
rop->mg = op->GetMg();
rop->mp = op->GetMp()*op->GetMg();
rop->rad = op->GetRad();
if (op->IsInstanceOf(Opolygon)){
rop->pcnt = ToPoly(op)->GetPointCount();
rop->padr = GetPointW(ToPoly(op));
rop->vcnt = ToPoly(op)->GetPolygonCount();
rop->vadr = (RayPolygon* )GetPolygonW(ToPoly(op));
rop->type = O_POLYGON;
}
}
//----------------- TexData -------------------
tex->mp = mat;// Set Material
//------------ InitRenderStruct ----------------
irs->fps = fps;
irs->time = BaseTime(time);
irs->doc = doc;
irs->docpath = dpath;
irs->vd = cd.vd;
//---------------- Sampling ---------------------
chandata = texChan1->GetData();
cd.off = chandata.GetReal(BASECHANNEL_BLUR_OFFSET,0.0);
cd.scale = 0.0;
cd.d = 0.0;
cd.n = Vector(0.0,1.0,0.0);
cd.texflag = TEX_TILE;
if (texShader->InitRender(*irs)==LOAD_OK) { TexInit = TRUE; return 0;}
else err = 5;
Error:
texShader->FreeRender();
return err;
}
//-------------------------------------------------------------------------------------------------
Sampler::Sampler()
{
texShader = NULL;
TexInit = FALSE;
offsetX = 1.0;
offsetY = 1.0;
lenX = 1.0;
lenY = 1.0;
//--------------- VolumeData -----------------
cd.vd = VolumeData::Alloc(); if (!cd.vd) {VolumeData::Free(cd.vd); return;}
cd.vd->version = 1; //LONG
cd.vd->fps = 25; //LONG
cd.vd->ambient = Vector(0.5);//0.0;
cd.vd->time = 0; //Real
cd.vd->bumpn = Vector(0.0,1.0,0.0);
cd.vd->back_delta = Vector(0.0);
cd.vd->global_mip = 1.0; //Real
cd.vd->orign = Vector(0.0,1.0,0.0);
cd.vd->n = Vector(0.0,1.0,0.0);
cd.vd->dispn = Vector(0.0,1.0,0.0);
cd.vd->delta = Vector(0.0);
cd.vd->dist = 0.0; //Real
cd.vd->lhit = RayHitID();
cd.vd->cosc = 1.0; //Real Angle
cd.vd->ddu = Vector(1.0,0.0,0.0);
cd.vd->ddv = Vector(0.0,1.0,0.0);
cd.vd->tray = NULL; //TRay
cd.vd->rray = NULL; //RRay
cd.vd->ray = NULL; //Ray
cd.vd->xlight = NULL; //RayLight
//---------------- TexData ------------------
tex = TexData::Alloc(); if (!tex) {VolumeData::Free(cd.vd);TexData::Free(tex); return;}
tex->Init();
tex->proj = P_UVW;
tex->texflag = TEX_TILE;
tex->lenx = lenX;
tex->leny = lenY;
tex->ox = offsetX;
tex->oy = offsetY;
cd.vd->tex = tex;
//---------------- RayObject -----------------
rop = AllocRayObject(0); if (!rop) return;
rop->link = NULL;
rop->texture_link = NULL;
rop->visibility = 1.0;
rop->pcnt = 0;
rop->padr = NULL;
rop->vcnt = 0;
rop->vadr = NULL;
rop->texcnt = 0;
rop->texadr = NULL;
rop->uvwadr = NULL;
rop->rsadr = NULL;
cd.vd->op = rop;
//---------------- RenderStruct -----------------
irs = gNew(InitRenderStruct);
}
//-------------------------------------------------------------------------------------------------
void Sampler::Free()
{
if (texShader){ if (TexInit) texShader->FreeRender(); }
TexInit = FALSE;
}
//-------------------------------------------------------------------------------------------------
Sampler::~Sampler(void)
{
Free();
if (tex) TexData::Free(tex);
if (cd.vd) VolumeData::Free(cd.vd);
FreeRayObject(rop);
gDelete(irs);
}
#endif//_SAMPLER_REMO_H_
