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// Shave and a Haircut
// (c) 2019 Epic Games
// US Patent 6720962
#include "shaveVrayShadeData.h"
#include "shaveVrayInstance.h"
#include "shaveVrayStaticVoxelPrim.h"
#include "shaveVrayMovingVoxelPrim.h"
shaveVrayShadeData::shaveVrayShadeData(shaveVrayInstance *instance/*, MayaHairPrimitiveType *hairPrimitive*/)
: BaseShadeData(instance)
{
}
shaveVrayVoxelPrim* shaveVrayShadeData::getIntersectedPrimitive(const VR::VRayContext &rc) {
if (rc.rayresult.primitive) {
if (rc.rayresult.primitive->type()==PRIM_TYPE_STATIC_HAIR_SEGMENT_LINE) {
VUtils::StaticHairSegmentLine *prim=static_cast<VR::StaticHairSegmentLine*>(rc.rayresult.primitive);
return static_cast<shaveVrayStaticVoxelPrim*>(prim->owner->owner);
}
if (rc.rayresult.primitive->type()==PRIM_TYPE_MOVING_HAIR_SEGMENT_LINE) {
VUtils::MovingHairSegmentLine *prim=static_cast<VR::MovingHairSegmentLine*>(rc.rayresult.primitive);
return static_cast<shaveVrayMovingVoxelPrim*>(prim->owner->owner);
}
#if defined(VRAY30) || defined(VRAY40)
if (rc.rayresult.primitive->type()==PRIM_TYPE_STATIC_HAIR_TREE) {
VUtils::StaticHairTreePrimitive *prim=static_cast<VUtils::StaticHairTreePrimitive*>(rc.rayresult.primitive);
return static_cast<shaveVrayStaticVoxelPrim*>(prim->owner);
}
if (rc.rayresult.primitive->type()==PRIM_TYPE_MOVING_HAIR_TREE) {
VUtils::MovingHairTreePrimitive *prim=static_cast<VUtils::MovingHairTreePrimitive*>(rc.rayresult.primitive);
return static_cast<shaveVrayMovingVoxelPrim*>(prim->owner);
}
#endif
}
return NULL;
}
VR::Color shaveVrayShadeData::getColor(const VR::VRayContext &rc)
{
shaveVrayVoxelPrim* voxelPrim=getIntersectedPrimitive(rc);
if (voxelPrim) {
int strandIdx, segmentIdx;
float segmentOffset;
shaveVrayGetHairParams(rc, strandIdx, segmentIdx, segmentOffset);
VR::Color result=VR::Color(0.0f, 1.0f, 0.0f);
if (voxelPrim->IsColorConst(strandIdx))
voxelPrim->GetRootColor(strandIdx, result);
else
voxelPrim->GetInterpColor(segmentIdx, strandIdx, segmentOffset, result);
return result;
}
return VR::Color(0.0, 0.0, 0.0);
}
//VR::Vector shaveVrayShadeData::getVelocity(const VR::VRayContext &rc)
//{
// shaveVrayVoxelPrim* voxelPrim=getIntersectedPrimitive(rc);
// if (voxelPrim) {
// int strandIdx=rc.rayresult.faceIndex;
// int segmentIdx=(int)rc.rayresult.extraf;
// float segmentOffset=rc.rayresult.bary[2];
//
// VR::Vector result=VR::Vector(0.0f, 1.0f, 0.0f);
// //if (voxelPrim->IsColorConst(strandIdx))
// // voxelPrim->GetRootColor(strandIdx, result);
// //else
// // voxelPrim->GetInterpColor(segmentIdx, strandIdx, segmentOffset, result);
// return result;
// }
// return VR::Vector(0.0, 0.0, 0.0);
//}
VR::Color shaveVrayShadeData::getIncandescence(const VR::VRayContext &rc)
{
return VR::Color(1.0, 1.0, 1.0); //temp
//int pos;
//float blend;
//getPositionAndBlend(rc, pos, blend);
//return hairData.incandescence[pos]*(1.0f-blend) + hairData.incandescence[pos+1]*blend;
}
VR::Color shaveVrayShadeData::getTransparency(const VR::VRayContext &rc)
{
shaveVrayVoxelPrim* voxelPrim=getIntersectedPrimitive(rc);
if (voxelPrim) {
int strandIdx, segmentIdx;
float segmentOffset;
shaveVrayGetHairParams(rc, strandIdx, segmentIdx, segmentOffset);
float opacity=1.0f;
if (voxelPrim->GetTipFade())
opacity=voxelPrim->GetInterpOpacity(segmentIdx, strandIdx, segmentOffset);
else
opacity=voxelPrim->GetOpacity(strandIdx);
float t=1.0f-opacity;
return VR::Color(t, t, t);
}
return VR::Color(1.0, 1.0, 1.0);
}
void shaveVrayShadeData::getShadeData(const VR::VRayContext &rc, VR::VRayMayaHairShadeData &result)
{
shaveVrayVoxelPrim* voxelPrim=getIntersectedPrimitive(rc);
if (voxelPrim) {
int strandIdx, segmentIdx;
float segmentOffset;
shaveVrayGetHairParams(rc, strandIdx, segmentIdx, segmentOffset);
result.hairDirection=voxelPrim->GetHairDir(rc.rayresult.origPoint, segmentIdx, strandIdx, segmentOffset);
result.color=VR::Color(0.0f, 1.0f, 0.0f);
if (voxelPrim->IsColorConst(strandIdx))
voxelPrim->GetRootColor(strandIdx, result.color);
else
voxelPrim->GetInterpColor(segmentIdx, strandIdx, segmentOffset, result.color);
float opacity=1.0f;
if (voxelPrim->GetTipFade())
opacity=voxelPrim->GetInterpOpacity(segmentIdx, strandIdx, segmentOffset);
else
opacity=voxelPrim->GetOpacity(strandIdx);
float t=1.0f-opacity;
result.transparency=VR::Color(t, t, t);
}
}
float shaveVrayShadeData::getDistanceAlongStrand(const VR::VRayContext &rc) {
int primType=rc.rayresult.primitive->type();
float k=0.0f;
int strandIdx, segmentIdx;
float segmentOffset;
shaveVrayGetHairParams(rc, strandIdx, segmentIdx, segmentOffset);
if (PRIM_TYPE_STATIC_HAIR_SEGMENT_LINE==primType) {
VR::StaticHairSegmentLine *seg=static_cast<VR::StaticHairSegmentLine*>(rc.rayresult.primitive);
k=seg->getWCoord(segmentOffset);
} else if (PRIM_TYPE_MOVING_HAIR_SEGMENT_LINE==primType) {
VR::MovingHairSegmentLine *seg=static_cast<VR::MovingHairSegmentLine*>(rc.rayresult.primitive);
k=seg->getWCoord(segmentOffset);
#if defined(VRAY30) || defined(VRAY40)
} else if (PRIM_TYPE_STATIC_HAIR_TREE==primType) {
VR::StaticHairTreePrimitive *treePrim=static_cast<VR::StaticHairTreePrimitive*>(rc.rayresult.primitive);
k=treePrim->getWCoord(strandIdx, segmentIdx, segmentOffset);
} else if (PRIM_TYPE_MOVING_HAIR_TREE==primType) {
VR::MovingHairTreePrimitive *treePrim=static_cast<VR::MovingHairTreePrimitive*>(rc.rayresult.primitive);
k=treePrim->getWCoord(strandIdx, segmentIdx, segmentOffset);
#endif
}
return k;
}
#if defined(VRAY30)
VR::Transform shaveVrayShadeData::getLocalUVWTransform(const VR::VRayContext &rc, int channel) {
VR::Transform result(0);
shaveVrayVoxelPrim* voxelPrim=getIntersectedPrimitive(rc);
if (voxelPrim) {
int strandIdx, segmentIdx;
float segmentOffset;
shaveVrayGetHairParams(rc, strandIdx, segmentIdx, segmentOffset);
result.offs=voxelPrim->GetUVW(segmentIdx, strandIdx, segmentOffset, channel);
}
return result;
}
#elif defined(VRAY40)
void shaveVrayShadeData::getLocalUVWTransform(const VR::VRayContext &rc, int channel, VR::ShadeTransform &result) {
result.m.makeZero();
getLocalUVWCoordinates(rc, channel, result.offs);
}
void shaveVrayShadeData::getLocalUVWCoordinates(const VR::VRayContext &rc, int channel, VR::ShadeVec &result) {
shaveVrayVoxelPrim* voxelPrim=getIntersectedPrimitive(rc);
if (voxelPrim) {
int strandIdx, segmentIdx;
float segmentOffset;
shaveVrayGetHairParams(rc, strandIdx, segmentIdx, segmentOffset);
result=VR::toShadeVec(voxelPrim->GetUVW(segmentIdx, strandIdx, segmentOffset, channel));
}
}
int shaveVrayShadeData::getLocalUVWTransformByName(const VR::VRayContext &rc, const VR::StringID &channelName, VR::ShadeTransform &result) {
return channelNotFound;
}
int shaveVrayShadeData::getUVWCoordinatesByName(const VR::VRayContext &rc, const VR::StringID &channelName, VR::ShadeVec &result) {
return channelNotFound;
}
VR::ShadeVec shaveVrayShadeData::getMapChannelVertexVector(int mapChannelIdx, int vertexIdx) {
return VR::ShadeVec(0.0f);
}
VR::ShadeVec shaveVrayShadeData::getUVWcoords(const VR::VRayContext &rc, int channel) {
return getMappedUVWcoords(rc, *this, channel);
}
void shaveVrayShadeData::getUVWderivs(const VR::VRayContext &rc, int channel, VR::ShadeVec derivs[2]) {
getMappedUVWderivs(rc, *this, channel, derivs);
}
void shaveVrayShadeData::getUVWbases(const VR::VRayContext &rc, int channel, VR::ShadeVec bases[3]) {
getMappedUVWbases(rc, *this, channel, bases);
}
VR::ShadeVec shaveVrayShadeData::getUVWnormal(const VR::VRayContext &rc, int channel) {
return getMappedUVWnormal(rc, *this, channel);
}
#endif
#if defined(VRAY30) || defined(VRAY40)
float shaveVrayShadeData::getRandByStrand(const VR::VRayContext &rc, int seedOffset)
{
int index=getStrandIndex(rc);
VR::Random rnd(index+seedOffset);
float res=rnd.rnd();
return res;
}
int shaveVrayShadeData::getStrandIndex(const VR::VRayContext &rc)
{
int strandIdx, segmentIdx;
shaveVrayGetHairParams(rc, strandIdx, segmentIdx);
return strandIdx;
}
int shaveVrayShadeData::getSegmentIndexInStrand(const VR::VRayContext &rc)
{
int strandIdx, segmentIdx;
shaveVrayGetHairParams(rc, strandIdx, segmentIdx);
return segmentIdx;
}
void shaveVrayShadeData::getIndexAndBlend(const VR::VRayContext &rc, int &out_index, float &out_blend)
{
out_index = 0;
out_blend = 0.0f;
}
#if VRAY_DLL_VERSION >= 0x36000
float shaveVrayShadeData::getStrandLength(const VR::VRayContext &rc)
{
shaveVrayVoxelPrim* voxelPrim = getIntersectedPrimitive(rc);
if (!voxelPrim) return 0;
int strandIdx, segmentIdx;
shaveVrayGetHairParams(rc, strandIdx, segmentIdx);
int vStart, vEnd;
voxelPrim->_voxel()->GetStrand(strandIdx, vStart, vEnd);
VR::Vector prev, next;
float length = 0;
voxelPrim->_voxel()->GetVert(vStart, prev.x, prev.y, prev.z);
for (int i = vStart + 1; i < vEnd; i++) {
voxelPrim->_voxel()->GetVert(i, next.x, next.y, next.z);
length += VR::length(next - prev);
prev = next;
}
return length;
}
#endif
#endif
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