mingzailao
/
mitsuba
mirror of https://github.com/Quartenia/mitsuba.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

hslt: always use a consistent edge direction in the bidirectional abstraction layer

metadata
johannes hanika 2014-11-03 17:31:38 +01:00 committed by Wenzel Jakob
parent 7e705a62a0
commit 23efb01b4d
2 changed files with 16 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/mitsuba/bidir/edge.h
View File

@ -53,6 +53,8 @@ struct MTS_EXPORT_BIDIR PathEdge {
/** /**
* \brief Normalized direction vector associated with this edge * \brief Normalized direction vector associated with this edge
*
* The direction always points along the light path (from the light)
*/ */
Vector d; Vector d;

15
src/libbidir/edge.cpp
View File

@ -63,6 +63,9 @@ bool PathEdge::sampleNext(const Scene *scene, Sampler *sampler,
weight[1-mode] = mRec.transmittance / pdf[1-mode]; weight[1-mode] = mRec.transmittance / pdf[1-mode];
} }
d = ray.d; d = ray.d;
/* Direction always points along the light path (from the light source along the path) */
if(mode == ERadiance)
d = -d;
return true; return true;
} }
@ -105,6 +108,9 @@ bool PathEdge::perturbDirection(const Scene *scene,
return false; return false;
} }
d = ray.d; d = ray.d;
/* Direction always points along the light path (from the light source along the path) */
if(mode == ERadiance)
d = -d;
if (length == 0) if (length == 0)
return false; return false;
@ -274,6 +280,9 @@ bool PathEdge::connect(const Scene *scene,
} }
} }
/* Direction always points along the light path (from the light source along the path) */
d = -d;
return true; return true;
} }
@ -330,7 +339,8 @@ bool PathEdge::pathConnect(const Scene *scene, const PathEdge *predEdge,
result.append(edge); result.append(edge);
edge->length = std::min(its.t, remaining); edge->length = std::min(its.t, remaining);
edge->medium = medium; edge->medium = medium;
edge->d = d; /* Direction always points along the light path (from the light source along the path) */
edge->d = -d;
if (medium) { if (medium) {
MediumSamplingRecord mRec; MediumSamplingRecord mRec;
@ -557,6 +567,9 @@ bool PathEdge::pathConnectAndCollapse(const Scene *scene, const PathEdge *predEd
} }
} }
/* Direction always points along the light path (from the light source along the path) */
d = -d;
return true; return true;
} }