// Shave and a Haircut
// (c) 2019 Epic Games
// US Patent 6720962

/**********************************************************************
 *<
	FILE:			shaveVrayStaticVoxelPrim.cpp -- iplementation file  

	DESCRIPTION:	Static (non motion blurred) hair primitive

	CREATED BY:		Vladimir Dubovoy <vladimir@3dgears.com>

	HISTORY:		created  20-08-2008 ( as part of 3ds Max + VRay hair shaders)
					merged   31-03-2010 

 *>
 **********************************************************************/

#include "assert.h"
#include "shaveVrayStaticVoxelPrim.h"
#include "shaveVrayInstance.h"
//#include "HairVrPrimsSharedFunctions.h"
#include "misc_ray.h"

#if defined(VRAY30) || defined(VRAY40)
using namespace VUtils;
#endif

shaveVrayStaticVoxelPrim::shaveVrayStaticVoxelPrim(IHairVoxel* voxel,VR::VRayCore *vray, shaveVrayInstance *inst)
    :shaveVrayVoxelPrim(voxel,vray,inst)
#if defined(VRAY30) || defined(VRAY40)
	,staticHairTree(NULL)
#endif

{
	_firstid()  = -1;
	_pts()		= NULL;
	_uns()      = NULL;
	_vns()		= NULL;
	_strands()  = NULL;
#if defined(VRAY30) || defined(VRAY40)
	minLeaf=0.0f;
	leafCoeff=1.0f;
	maxDepth=80;
	
	const VRaySequenceData &sdata=vray->getSequenceData();
	const VRayFrameData &fdata=vray->getFrameData();

	threadman=sdata.threadManager;
	prog=sdata.progress;
#if VRAY_DLL_VERSION < 0x36000
	tessParams.setFDataParams(fdata.camToWorld.offs, fdata.fov, fdata.imgWidth);
#else
	tessParams.setFDataParams(fdata.camToWorld.offs, fdata.fov, fdata.imgWidth, fdata.worldToCam, fdata.projType, fdata.zoomFractor, fdata.devAspect);
#endif
	tessParams.setSubdivThresh(inst->plugin->edgeLen);
#else
	_pool_Vector().init(sizeof(VR::Vector)*3*numknots(), 1000);
#endif
}

shaveVrayStaticVoxelPrim::~shaveVrayStaticVoxelPrim()
{
	//these should be released in ::collapse()
	//but we add this code here in any case
	if(pts())
		delete [] pts();

	if(uns())
		delete [] uns();
	
	if(vns())
		delete [] vns();
#if defined(VRAY30) || defined(VRAY40)
	if(staticHairTree)
		delete staticHairTree;
#endif
}

/*
|	from StaticPrimitive
*/
void shaveVrayStaticVoxelPrim::getBBox (VR::StaticBox &bbox)
{
	//DebugPrint("PRIM> shaveVrayStaticVoxelPrim::getBBox ");

	if(voxel())
	{
		VERT pmin;
		VERT pmax;
		voxel()->GetBbox(pmin,pmax);

		bbox.pmin.x = pmin.x;
		bbox.pmin.y = pmin.y;
		bbox.pmin.z = pmin.z;

		bbox.pmax.x = pmax.x;
		bbox.pmax.y = pmax.y;
		bbox.pmax.z = pmax.z;
		
		/*DebugPrint("[%f %f %f][%f %f %f]\n", 
					bbox.pmin.x, bbox.pmin.y, bbox.pmin.z,
					bbox.pmax.x, bbox.pmax.y, bbox.pmax.z);*/

		VR::Vector scnoffs = VR::toVector(sceneOffset());
		bbox.pmin -= scnoffs;
		bbox.pmax -= scnoffs;
	}
}

/*
|	from StaticPrimitive
*/
bool shaveVrayStaticVoxelPrim::splittable ()
{
	//DebugPrint("PRIM> shaveVrayStaticVoxelPrim::splitable\n");

	return true;
}

/*
|	from StaticPrimitive
*/
void shaveVrayStaticVoxelPrim::split (int dim, VR::real middle, VR::StaticBox &bLeft, VR::StaticBox &bRight)
{
	//DebugPrint("PRIM> shaveVrayStaticVoxelPrim::split [%i %f]\n",dim,middle);

	VR::StaticBox bbox;
	getBBox(bbox); 
	bbox.split(dim, middle, bLeft, bRight);
}
/*
|	from StaticPrimitive
*/
int shaveVrayStaticVoxelPrim::expandable()
{
	return true;
}


/*
|	from StaticHairGenerator
*/
int shaveVrayStaticVoxelPrim::getNumSides() const
{
	return 4;
}

/*
|	from StaticHairGenerator
*/
int shaveVrayStaticVoxelPrim::getNumKnots()
{
	return numknots();
}
/*
|	from StaticHairGenerator
*/
void shaveVrayStaticVoxelPrim::getSidesUV(float *&uc, float *&vc) 
{
	uc = _puc();
	vc = _pvc();
}
/*
|	from StaticHairGenerator
*/
void shaveVrayStaticVoxelPrim::getSidesUV(const float *&uc, const float *&vc) const
{
	uc = puc();
	vc = pvc();
	//int size = eNumSides*sizeof(float);
	//memcpy((void*)uc,puc(),size);
	//memcpy((void*)vc,pvc(),size);
}
/*
|	from StaticHairGenerator
*/
int shaveVrayStaticVoxelPrim::getFlatNormal() const
{
	return true;
}
/*
|	from StaticHairGenerator
*/
float shaveVrayStaticVoxelPrim::getRadius()
{
	return 1.0f;	//not sure
}
/*
|	from StaticHairGenerator
*/
float shaveVrayStaticVoxelPrim::getLength()
{
	return 100.f;	//not sure
}
/*
|	from StaticHairGenerator
*/
float shaveVrayStaticVoxelPrim::getTaper()
{
	return 0.0f;	//not sure
}
/*
|	from StaticHairGenerator
*/
VR::Vector shaveVrayStaticVoxelPrim::getGravity()
{
	return VR::Vector(0.0f, 0.0f, 0.0f);	//not sure
}
/*
|	from StaticHairGenerator
*/
float shaveVrayStaticVoxelPrim::getLengthRand()
{
	return 0.0f;
}
/*
|	from StaticHairGenerator
*/
float shaveVrayStaticVoxelPrim::getRadiusRand()
{
	return 0.0f;
}
/*
|	from StaticHairGenerator
*/
float shaveVrayStaticVoxelPrim::getGravityRand()
{
	return 0.0f;
}
/*
|	from StaticHairGenerator
*/
float shaveVrayStaticVoxelPrim::getDirRand()
{
	return 0.0f;
}
/*
|	from StaticHairGenerator
*/
float shaveVrayStaticVoxelPrim::getBend()
{
	return 0.0f;
}
int shaveVrayStaticVoxelPrim::generateStrand(int faceIndex, int strandIndex, 
							const VR::Vector *pv, const VR::Vector *nv, 
							VR::Vector *pts, VR::Vector *un, VR::Vector *vn)
{
	assert(false);
	//maybe we do not need to change array elementws as far as we passed initalized strands
	return true;
}
/*
|	from StaticHairGenerator
*/
VR::Vector shaveVrayStaticVoxelPrim::getStrandBaryCoords(int faceIndex, int strandIndex) const
{
	return VR::Vector(1.0f, 0.0f, 0.f);
}
/*
|	from StaticHairGenerator
*/
VR::Vector* shaveVrayStaticVoxelPrim::newVectors(int threadIndex) 
{
#if defined(VRAY30) || defined(VRAY40)
	return NULL;
#else
	return (VR::Vector*) _pool_Vector().newElement(); 
#endif
}
/*
|	from StaticHairGenerator
*/
void shaveVrayStaticVoxelPrim::deleteVectors(VR::Vector *x, int threadIndex) 
{ 
	_pool_Vector().releaseElement(x); 
}

/*
|	from GeometryGenerator
*/
#if defined(VRAY30)
VR::Vector shaveVrayStaticVoxelPrim::getGNormal(VR::RSRay &rsray)
{
	return rsray.is.primitive->getGNormal(rsray);
}
VR::Vector shaveVrayStaticVoxelPrim::getNormal(VR::RSRay &rsray)
{
	return  rsray.is.primitive->getNormal(rsray);
}
#elif defined(VRAY40)
VR::ShadeVec shaveVrayStaticVoxelPrim::getGNormal(VR::RSRay &rsray)
{
	return rsray.is.primitive->getGNormal(rsray);
}
VR::ShadeVec shaveVrayStaticVoxelPrim::getNormal(VR::RSRay &rsray)
{
	return  rsray.is.primitive->getNormal(rsray);
}
#endif

#if defined(VRAY30) || defined(VRAY40)
/*
 * ###########################################
 * Implementation for V-Ray 3.0+
 * ###########################################
 */
int shaveVrayStaticVoxelPrim::initHairData() {
	const HairType &hair=voxel()->GetHair();
	int numHairs=hair.GetNumStrands();
	
	//assume all hairs have the same number of segments
	_numknots()=hair.face_end[0]-hair.face_start[0];

	// hair data will hold data from voxel
	hairData.numVertices=VR::IntRefList(numHairs);
	hairData.vertices=VR::VectorRefList(numHairs*_numknots());
	hairData.widths=VR::FloatRefList(numHairs*_numknots());
	hairData.colors=VR::ColorRefList(numHairs*_numknots());

	VR::Vector scnoffs=VR::toVector(sceneOffset());
	// fill in our hair data
	for(int i=0; i<numHairs; ++i) {
		int pts_offset=i*numknots();

		float root_radius=hair.radiusroot[i];
		float delta_radius=hair.radiustip[i]-root_radius;
		
		for(int j=0; j<numknots(); ++j) {
			int vert_idx=hair.face_start[i] + j;
			int pt_idx=pts_offset+j;
		
			VR::Vector pt;
			hair.GetVert(vert_idx, pt.x, pt.y, pt.z);
			pt-=scnoffs;
			hairData.vertices[pt_idx]=pt;

			float t=float(j)/float(numknots()-1);
			float w=VR::Max(0.0001f, root_radius+t*delta_radius);
			hairData.widths[pt_idx]=w;

			VR::Color knot_color;
			hair.GetVertColor(i, j, knot_color.r, knot_color.g, knot_color.b);
			hairData.colors[pt_idx]=knot_color;
		}
		hairData.numVertices[i]=_numknots();
	}

	hairData.initVertexOffsets();

	tmHairData.hairData=&hairData;
	tmHairData.worldSpaceVertices=hairData.vertices;
	tmHairData.initDirs();

	if (hinst()->plugin->dynHairTessel) {
		tesselateHairData(tmHairData, &tessHairData, NULL, NULL, tessParams);
	}

	return numHairs;
}

#if defined(VRAY30)
void shaveVrayStaticVoxelPrim::storeInGlobalTree(VR::RayServerInterface2 *rayserver)
#elif defined(VRAY40)
void shaveVrayStaticVoxelPrim::storeInGlobalTree(VR::RayServerInterface *rayserver)
#endif
{
	if (!staticHairTree) {
		int num_hairs=initHairData();
		if(firstid()==-1)
			_firstid()=rayserver->getNewRenderIDArray(num_hairs+1);
		staticHairTree=new StaticHairTreePrimitive(firstid(), &tmHairData, NULL, 0);
	}
	rayserver->storeStaticHairData(staticHairTree, this, firstid(), tmHairData);
}

int shaveVrayStaticVoxelPrim::expand(VR::DynamicRaycaster< VR::StaticBox > *raycaster, int threadIndex) {
	
	int num_hairs=initHairData();

	if(firstid()==-1)
		_firstid()=raycaster->getNewRenderIDArray(num_hairs+1);

#if VRAY_DLL_VERSION < 0x31000
	staticHairTree=new VR::StaticHairTreePrimitive(firstid()+1, &tmHairData, NULL, true);
#else
#if VRAY_DLL_VERSION >= 0x40000
	RayServerInterface* rayserver = vrayCore->getSequenceData().rayserver;
#else
	RayServerInterface2* rayserver = vrayCore->getSequenceData().rayserver;
#endif
	VoxelTree * tree = rayserver->newStaticVoxelTree(&tmHairData, voxelTreeType_hairTree);
	staticHairTree=new StaticHairTreePrimitive(firstid()+1, &tmHairData, NULL, tree);
#endif

#if VRAY_DLL_VERSION < 0x36000
	staticHairTree->visibleToCamera=_hinst()->primary_visibility; // should we intersect this hair tree wil cam rays?
#else
	staticHairTree->visibleToCamera = _hinst()->getPrimaryVisibility();
#endif
	staticHairTree->build(prog, threadman, maxDepth, minLeaf, leafCoeff);

	raycaster->insertPrimitive(threadIndex, staticHairTree, this, firstid());

	int totalVertices=numknots()*num_hairs;
	uint64 memUsage=staticHairTree->getMemUsage();
	return memUsage+3*sizeof(VR::Vector)*totalVertices;
}

int shaveVrayStaticVoxelPrim::collapse(VR::DynamicRaycaster< VR::StaticBox > *raycaster, int threadIndex) {
	raycaster->removePrimitive(threadIndex, staticHairTree);
	uint64 memUsage=staticHairTree->getMemUsage();
	delete staticHairTree;
	staticHairTree=NULL;
	memUsage+=3*sizeof(Vector)*tmHairData.hairData->vertices.size();

	tmHairData.freeMem();
	hairData.freeMem();
	tessHairData.freeMem();
	
	return memUsage;
}

void shaveVrayStaticVoxelPrim::getStaticIntersectionData(int strandIdx, int segmentIdx, const VR::Vector* &p, const VR::Vector* &dirs) {
	int startIdx = tmHairData.hairData->vertexOffsets[strandIdx] + segmentIdx;
	p = &tmHairData.worldSpaceVertices[startIdx];
	dirs = &tmHairData.dirs[startIdx];
}

void shaveVrayStaticVoxelPrim::setCommonIntersectionData(VR::RSRay &rsray, void *isd, int strandIdx, int segmentIdx, 
														 float wParam, const ShadeVec &gNormal, const ShadeVec &normal) 
{
	IntersectionData &isData=*((IntersectionData*) isd);
	RSIntersection &is=rsray.is;

	isData.primitive=rsray.is.primitive;
	isData.skipTag=is.skipTag;

	isData.sb=getShadeable();
	isData.sd=getExtTexMapping();
	isData.si=getExtShadeData();

	isData.surfaceProps=NULL;
	isData.volume=NULL;

	isData.wpointCoeff=is.t;
#if defined(VRAY30)
	isData.wpoint=rsray.p+TracePoint(rsray.dir)*is.t;
#elif defined(VRAY40)
	isData.wpoint=rsray.p+rsray.dir*is.t;
#endif

	isData.gnormal=gNormal;
	isData.normal=normal;

	// These will be used to get per-vertex attributes like color, transparency, etc.
	isData.extra_int[1]=strandIdx; // the hair strand index
	isData.faceIndex=segmentIdx; // the segment index within a hair strand
	
	isData.bary = ShadeVec(wParam, 0.0f, 0.0f); // the length along the segment

	isData.faceBase = ShadeVec(0.0f, 0.0f, 0.0f);
	isData.faceEdge0 = ShadeVec(0.0f, 0.0f, 0.0f);
	isData.faceEdge1 = ShadeVec(0.0f, 0.0f, 0.0f);
}

#if defined(VRAY30)
void shaveVrayStaticVoxelPrim::setCommonIntersectionData(const VR::RayBunchParams& params, VR::PrimitiveIntersections& result, 
														 const RAY_IDX idx, int strandIdx, int segmentIdx, float wParam, 
														 const VUtils::Vector &gNormal, const VUtils::Vector &normal) 
{
	VR::Ireal t = result.rayDistances()[ idx ];
	for(int d=0; d<3; d++) result.isectPoints(d)[idx] = params.origins(d)[idx] + params.dirs(d)[idx] * t;

	for(int d=0; d<3; d++) result.geomNormals(d)[idx] = gNormal[d];

	for(int d=0; d<3; d++) result.smoothNormals(d)[idx] = normal[d];

	// These will be used to get per-vertex attributes like color, transparency, etc.
	result.extraInts(1)[idx] = strandIdx; // the hair strand index
	result.faceIndices()[idx] = segmentIdx; // the segment index within a hair strand

	VR::Vector bary = VR::Vector(wParam, 0.0f, 0.0f); // the length along the segment
	for(int d=0; d<3; d++) result.baryCoords(d)[idx] = bary[d];

	for(int d=0; d<3; d++) result.facesBase(d)[idx] = 0.0f;
	for(int d=0; d<3; d++) result.facesEdge0(d)[idx] = 0.0f;
	for(int d=0; d<3; d++) result.facesEdge1(d)[idx] = 0.0f;
}
#endif

void shaveVrayStaticVoxelPrim::setIntersectionData(VR::RSRay &rsray, void *isd) {
	VR::StaticHairTreePrimitive *treePrim=static_cast<VR::StaticHairTreePrimitive*>(rsray.is.primitive);
	int strandIdx=treePrim->getStrandIndex(rsray);
	int segmentIdx=treePrim->getSegmentIndex(rsray);

	const VR::Vector *p, *dirs;
	getStaticIntersectionData(strandIdx, segmentIdx, p, dirs);

	setCommonIntersectionData(rsray, isd, strandIdx, segmentIdx,
		treePrim->getWparam(rsray, p),
		treePrim->getGNormal(rsray, p),
		treePrim->getNormal(rsray, p, dirs, getFlatNormal()));
}

#if defined(VRAY30)
void shaveVrayStaticVoxelPrim::setIntersectionData(const VR::RayBunchParams& params, VR::PrimitiveIntersections& result, const RAY_IDX* idxs, size_t count)
{
	// Iterate over the active rays
	for( size_t i = 0; i < count; i++ )	{
		const RAY_IDX idx = idxs[ i ];

		VR::StaticHairTreePrimitive *treePrim=static_cast<VR::StaticHairTreePrimitive*>(result.primitives()[idx]);
	 
		int strandIdx=treePrim->getStrandIndex(params, result, idx);
		int segmentIdx=treePrim->getSegmentIndex(params, result, idx);

		const VR::Vector *p, *dirs;
		getStaticIntersectionData(strandIdx, segmentIdx, p, dirs);

		setCommonIntersectionData(params, result, idx, strandIdx, segmentIdx,
			treePrim->getWparam(params, result, idx, p),
			treePrim->getGNormal(params, result, idx, p),
			treePrim->getNormal(params, result, idx, p, dirs, getFlatNormal()));
	}
}
#endif

VR::ShadeVec shaveVrayStaticVoxelPrim::getHairDir(const VR::VRayContext &rc) const {
	int strandIdx, segmentIdx;
	shaveVrayGetHairParams(rc, strandIdx, segmentIdx);

	int pos=hairData.vertexOffsets[strandIdx]+segmentIdx;
	float blend=rc.rayresult.bary[0];

	VR::ShadeVec result(0.0f, 0.0f, 0.0f);

	const VR::VectorRefList &vertices=tmHairData.worldSpaceVertices;
	if (segmentIdx==0) {
		VR::ShadeVec v=VR::toShadeVec(vertices[pos]);
		VR::ShadeVec vnext=VR::toShadeVec(vertices[pos+1]);
		result=normalize0(vnext-v);
	} else {
		VR::ShadeVec vprev=VR::toShadeVec(vertices[pos-1]);
		VR::ShadeVec v=VR::toShadeVec(vertices[pos]);
		VR::ShadeVec vnext=VR::toShadeVec(vertices[pos+1]);
		VR::ShadeVec prev_dir = normalize0(v-vprev);
		VR::ShadeVec curr_dir = normalize0(vnext-v);

		result=normalize0(prev_dir + (curr_dir - prev_dir)*blend);
	}

	return result;
}

#else //VRAY30 not defined below this line
/*
 * ###########################################
 * Implementation for V-Ray <= 2.99
 * ###########################################
 */
/*
|	from StaticPrimitive
*/
int shaveVrayStaticVoxelPrim::expand (VR::DynamicRaycaster< VR::StaticBox > *raycaster, int threadIndex)
{
	const HairType& hair = voxel()->GetHair();
	int   numHairs = hair.GetNumStrands();
	
	if(numHairs == 0)
		return 0;

	if(firstid() == -1)
		_firstid() = raycaster->getNewRenderIDArray(numHairs);

	//assume all hairs have the same number of segments
	_numknots() = hair.face_end[0] - hair.face_start[0];

	int nalloc = numknots()*numHairs;
	_pts() = new VR::Vector[nalloc];
	_uns() = new VR::Vector[nalloc];
	_vns() = new VR::Vector[nalloc];

	_strands() = new VR::StaticHairStrand[numHairs];
	for(int i = 0; i < numHairs; i++)
	{
		int pts_offset = i*numknots();

		float root_radius  = hair.radiusroot[i];
		float delta_radius = hair.radiustip[i] - root_radius;
		
		VR::Vector initialNormal;
		VR::Vector sv0, sv1;
		hair.GetVert(0, sv0.x, sv0.y, sv0.z);
		hair.GetVert(1, sv1.x, sv1.y, sv1.z);
		initialNormal=VR::normalize0(sv1-sv0);

		// Compute the initial tangent vectors - these are later on propagated along the
		// strand length to avoids issues with flipped tangent vectors.
		VR::Vector u,v;
		VR::computeTangentVectors(initialNormal, u, v);

		for(int j = 0; j < numknots(); j++)
		{
			int vert_idx = hair.face_start[i] + j;
			int pt_idx   = pts_offset + j;
		
			hair.GetVert(vert_idx,_pt(pt_idx).x,_pt(pt_idx).y,_pt(pt_idx).z);
	
			_pt(pt_idx) -= sceneOffset();

			if(j == 0)
			{
				float radius = root_radius;
				if (radius<0.0001f) radius=0.0001f;

				// For the first point, just use the tangent vectors directly
				_un(pt_idx) = u*radius;
				_vn(pt_idx) = v*radius;
			}	
			else
			{
				float t = (float)j/(float)(numknots()-1);
				float radius = root_radius + t*delta_radius;
				if (radius<0.0001f) radius=0.0001f;

				VR::Vector v0, v1;
				hair.GetVert(vert_idx, v1.x, v1.y, v1.z);
				hair.GetVert(vert_idx-1, v0.x, v0.y, v0.z);

				VR::Vector d=v1-v0;
				float dlenSqr=d.lengthSqr();
				if (dlenSqr>1e-12f) {
					VR::Vector nu=u-d*((u*d)/sqrtf(dlenSqr)); // Project the previous u vector on the current cross plane
					float nuLenSqr=lengthSqr(nu);
					if (nuLenSqr>1e-12f) {
						u=nu/sqrtf(nuLenSqr);
						v=normalize(d^nu);
					}
				}

				_un(pt_idx) = u*radius;
				_vn(pt_idx) = v*radius;
			}
		}

		_strand(i).init(static_cast<StaticHairGenerator*>(this),pts(pts_offset), uns(pts_offset), vns(pts_offset));
		
		raycaster->insertPrimitive(threadIndex, &_strand(i), static_cast<GeometryGenerator*>(this), i + firstid());
	}
#ifdef _DEBUG
#ifdef WIN32
	assert(_CrtCheckMemory());
#endif
#endif
	return numHairs*sizeof(VR::StaticHairStrand) + numknots()*numHairs*3*sizeof(VR::Vector);
}

/*
|	from StaticPrimitive
*/
int shaveVrayStaticVoxelPrim::collapse (VR::DynamicRaycaster< VR::StaticBox > *raycaster, int threadIndex)
{
	const HairType& hair = voxel()->GetHair();
	int   numHairs = hair.GetNumStrands();
	
	if(numHairs == 0)
		return 0;

	if(strands())
	{
		for (int i=0; i < numHairs; i++) 
			raycaster->removePrimitive(threadIndex, &_strand(i));
	
		delete[] strands();
		_strands() = NULL;
	}
	if(pts())
	{
		delete [] pts();
		_pts() = NULL;
	}
	if(uns())
	{
		delete [] uns();
		_uns() = NULL;
	}
	if(vns())
	{
		delete [] vns();
		_vns() = NULL;
	}
	_pool_Vector().freeMem();

	return numHairs*sizeof(VR::StaticHairStrand) + numknots()*numHairs*3*sizeof(VR::Vector);
}

/*
|	from GeometryGenerator
*/
void shaveVrayStaticVoxelPrim::setIntersectionData(VR::RSRay &rsray, void *isd)
{
	VR::IntersectionData &isData=*((VR::IntersectionData*) isd);
	VR::RSIntersection &is=rsray.is;

	//assert(PRIM_TYPE_STATIC_HAIR_SEGMENT_LINE == is.primitive->type());

	VR::StaticHairStrand *s=(VR::StaticHairStrand*) (is.primitive->owner);
	
//	VR::RayParams* rayparams =  (VR::RayParams*)rsray.rayparams;
//	assert( rayparams->currentPass == RPASS_GI);
//	assert( rayparams->currentPass == RPASS_LIGHTMAP);

	isData.primitive=is.primitive;
	isData.skipTag  =is.skipTag;
	isData.faceIndex= s->ownerIndex - firstid();
	
	if(ownbsdf())
		isData.sb = shade();
	else
		isData.sb = shdata();

	isData.sd =	shdata();  
	isData.si = /*NULL;*/ shinst(); 
	isData.volume=NULL;

	isData.bary= VR::Vector(0.5f, 0.5f, 0.5f);  
	isData.wpointCoeff=is.t;
	isData.gnormal=getGNormal(rsray);
	isData.gnormal.makeNormalized();
	//if(isData.gnormal.length() < 0.99f)
	//{
	//	printf("gn %f %f %f\n",isData.gnormal.x, isData.gnormal.y, isData.gnormal.z);
	//	fflush(stdout);
	//}
	isData.normal =getNormal(rsray);

	isData.wpoint=rsray.p + VR::TracePoint(rsray.dir)*is.t;
	isData.extraf=(float) s->getSegmentIndex((VR::StaticHairSegmentLine*) is.primitive);
	isData.bary[2]=((VR::StaticHairSegmentLine*) is.primitive)->getWparam(rsray);
	
//	Vector *verts=fface->getVerts();
//	isData.faceBase=verts[0];
//	isData.faceEdge0=verts[1]-verts[0];
//	isData.faceEdge1=verts[2]-verts[0];

	// We don't have any meaningful data here
	isData.surfaceProps = NULL; // sfprops();
}

void shaveVrayStaticVoxelPrim::setIntersectionData(const VR::RayBunchParams& params, VR::PrimitiveIntersections& result, const RAY_IDX* idxs, size_t count)
{
	for(size_t ii=0; ii<count; ++ii)	{
		const RAY_IDX idx=idxs[ii];
		
		VR::StaticHairSegmentLine *segment=static_cast<VR::StaticHairSegmentLine*>(result.primitives()[idx]);
		VR::StaticHairStrand *strand=static_cast<VR::StaticHairStrand*>(segment->owner);
		
		float t=result.rayDistances()[idx];
		for(int d=0; d<3; d++)
			result.isectPoints(d)[idx]=params.origins(d)[idx]+double(params.dirs(d)[idx])*t;
		
		VR::Vector gnormal = segment->getGNormal(params, result, idx);
		for(int d=0; d<3; d++)
			result.geomNormals(d)[idx]=gnormal[d];

		VR::Vector normal = segment->getNormal(params, result, idx);
		for(int d=0; d<3; d++)
			result.smoothNormals(d)[idx]=normal[d];

		// These will be used to get per-vertex attributes like color, transparency, etc.
		result.faceIndices()[idx]=strand->getSegmentIndex(segment);

//		result.extraFloats(6)[idx]=(float)strand->getSegmentIndex(segment); // the segment index within a hair strand
		result.extraInts(1)[idx]=strand->ownerIndex - firstid(); // emil 10 Nov
		
		VR::Vector bary(0.5f, 0.5f, segment->getWparam(params, result, idx)); // the length along the segment
		for(int d=0; d<3; d++)
			result.baryCoords(d)[idx]=bary[d];

		for(int d=0; d<3; d++)
			result.facesBase(d)[idx]=0.0f;
		for(int d=0; d<3; d++)
			result.facesEdge0(d)[idx]=0.0f;
		for(int d=0; d<3; d++)
			result.facesEdge1(d)[idx]=0.0f;
	}
}

#endif //VRAY30