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directional luminaire works

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Wenzel Jakob 2010-08-13 02:26:07 +02:00
parent 0d00364edc
commit b8ff508576
2 changed files with 38 additions and 34 deletions
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2
src/luminaires/collimated.cpp
View File

@ -14,7 +14,7 @@ public:
m_intensity = props.getSpectrum("intensity", power / m_surfaceArea);
m_invSurfaceArea = 1 / m_surfaceArea;
m_direction = m_luminaireToWorld(Vector(0, 0, 1));
m_type = EDeltaDirection | EDeltaPosition;
m_type = EDeltaDirection;
}
CollimatedBeamLuminaire(Stream *stream, InstanceManager *manager)

62
src/luminaires/directional.cpp
View File

@ -8,27 +8,39 @@ MTS_NAMESPACE_BEGIN
class DirectionalLuminaire : public Luminaire {
public:
DirectionalLuminaire(const Properties &props) : Luminaire(props) {
m_radius = props.getFloat("radius", 0.01f);
m_surfaceArea = m_radius * m_radius * M_PI;
Spectrum power = props.getSpectrum("power", 1);
m_intensity = props.getSpectrum("intensity", power / m_surfaceArea);
m_invSurfaceArea = 1 / m_surfaceArea;
m_direction = m_luminaireToWorld(Vector(0, 0, 1));
m_type = EDeltaDirection | EDeltaPosition;
m_intensity = props.getSpectrum("intensity", Spectrum(1.0f));
m_diskRadius = 0;
m_type = EDeltaDirection;
}
DirectionalLuminaire(Stream *stream, InstanceManager *manager)
: Luminaire(stream, manager) {
m_intensity = Spectrum(stream);
m_radius = stream->readFloat();
m_invSurfaceArea = 1 / m_surfaceArea;
m_direction = m_luminaireToWorld(Vector(0, 0, 1));
m_diskOrigin = Point(stream);
m_diskRadius = stream->readFloat();
configure();
}
void configure() {
m_direction = normalize(m_luminaireToWorld(Vector(0, 0, 1)));
m_surfaceArea = m_diskRadius * m_diskRadius * M_PI;
m_invSurfaceArea = 1.0f / m_surfaceArea;
}
void serialize(Stream *stream, InstanceManager *manager) const {
Luminaire::serialize(stream, manager);
m_intensity.serialize(stream);
stream->writeFloat(m_radius);
m_diskOrigin.serialize(stream);
stream->writeFloat(m_diskRadius);
}
void preprocess(const Scene *scene) {
/* Get the scene's bounding sphere and slightly enlarge it */
BSphere bsphere = scene->getBSphere();
m_diskRadius = bsphere.radius;
m_diskOrigin = bsphere.center - m_direction * bsphere.radius;
configure();
}
Spectrum getPower() const {
@ -36,7 +48,7 @@ public:
}
Spectrum Le(const LuminaireSamplingRecord &lRec) const {
/* Collimated beam is not part of the scene */
/* Directional luminaire is not part of the scene */
Log(EWarn, "This function should never be called.");
return Spectrum(0.0f);
}
@ -53,19 +65,12 @@ public:
inline void sample(const Point &p, LuminaireSamplingRecord &lRec,
const Point2 &sample) const {
Point local = m_worldToLuminaire(p);
Vector2 planeProjection = Vector2(local.x, local.y);
if (planeProjection.length() > m_radius || local.z < 0) {
lRec.pdf = 0.0f;
} else {
lRec.sRec.p = m_luminaireToWorld(Point(local.x, local.y, 0));
lRec.sRec.p = p - m_direction * (2 * m_diskRadius);
lRec.d = m_direction;
lRec.luminaire = this;
lRec.pdf = 1.0f;
lRec.Le = m_intensity;
}
}
void sample(const Intersection &its, LuminaireSamplingRecord &lRec,
const Point2 &sample) const {
@ -73,8 +78,8 @@ public:
}
void sampleEmission(EmissionRecord &eRec, const Point2 &sample1, const Point2 &sample2) const {
Point2 posOnDisk = squareToDiskConcentric(sample1) * m_radius;
eRec.sRec.p = m_luminaireToWorld(Point(posOnDisk.x, posOnDisk.y, 0));
Point2 posOnDisk = squareToDiskConcentric(sample1) * m_diskRadius;
eRec.sRec.p = m_diskOrigin + Frame(m_direction).toWorld(Point(posOnDisk.x, posOnDisk.y, 0));
eRec.d = m_direction;
eRec.pdfArea = m_invSurfaceArea;
eRec.pdfDir = 1;
@ -82,8 +87,8 @@ public:
}
void sampleEmissionArea(EmissionRecord &eRec, const Point2 &sample) const {
Point2 posOnDisk = squareToDiskConcentric(sample) * m_radius;
eRec.sRec.p = m_luminaireToWorld(Point(posOnDisk.x, posOnDisk.y, 0));
Point2 posOnDisk = squareToDiskConcentric(sample) * m_diskRadius;
eRec.sRec.p = m_diskOrigin + Frame(m_direction).toWorld(Point(posOnDisk.x, posOnDisk.y, 0));
eRec.pdfArea = m_invSurfaceArea;
eRec.P = m_intensity;
}
@ -99,7 +104,7 @@ public:
}
Spectrum f(const EmissionRecord &eRec) const {
/* Collimated beam is not part of the scene */
/* Directional luminaire beam is not part of the scene */
Log(EWarn, "This function should never be called.");
return Spectrum(0.0f);
}
@ -115,9 +120,7 @@ public:
oss << "DirectionalLuminaire[" << std::endl
<< " intensity = " << m_intensity.toString() << "," << std::endl
<< " power = " << getPower().toString() << "," << std::endl
<< " position = " << m_luminaireToWorld(Point(0, 0, 0)).toString() << "," << std::endl
<< " direction = " << m_direction.toString() << "," << std::endl
<< " radius = " << m_radius << std::endl
<< " direction = " << m_direction.toString()
<< "]";
return oss.str();
}
@ -127,7 +130,8 @@ private:
Spectrum m_intensity;
Vector m_direction;
Float m_invSurfaceArea;
Float m_radius;
Float m_diskRadius;
Point m_diskOrigin;
};
MTS_IMPLEMENT_CLASS_S(DirectionalLuminaire, false, Luminaire)