Public Member Functions | |
| sphereLight_t (const point3d_t &c, PFLOAT rad, const color_t &col, CFLOAT inte, int nsam) | |
| ~sphereLight_t () | |
| virtual void | init (scene_t &scene) |
| allow for preprocessing when scene loading has finished | |
| virtual color_t | totalEnergy () const |
| total energy emmitted during whole frame | |
| virtual color_t | emitPhoton (float s1, float s2, float s3, float s4, ray_t &ray, float &ipdf) const |
| emit a photon | |
| virtual color_t | emitSample (vector3d_t &wo, lSample_t &s) const |
| create a sample of light emission, similar to emitPhoton, just more suited for bidirectional methods | |
| virtual bool | diracLight () const |
| indicate whether the light has a dirac delta distribution or not | |
| virtual bool | illumSample (const surfacePoint_t &sp, float s1, float s2, color_t &col, float &ipdf, ray_t &wi) const |
| virtual bool | illumSample (const surfacePoint_t &sp, lSample_t &s, ray_t &wi) const |
| illuminate a given surface point, generating sample s, fill in s.sp if not NULL; Set ray to test visibility by integrator | |
| virtual bool | illuminate (const surfacePoint_t &sp, color_t &col, ray_t &wi) const |
| illuminate a given surfance point; Set ray to test visibility by integrator. Only for dirac lights. | |
| virtual bool | canIntersect () |
| virtual bool | intersect (const ray_t &ray, PFLOAT &t, color_t &col, float &ipdf) |
| virtual float | illumPdf (const surfacePoint_t &sp, const surfacePoint_t &sp_light) const |
| get the pdf for sampling the incoming direction wi at surface point sp (illumSample!) | |
| virtual void | emitPdf (const surfacePoint_t &sp, const vector3d_t &wo, float &areaPdf, float &dirPdf, float &cos_wo) const |
| get the pdf values for sampling point sp on the light and outgoing direction wo when emitting energy (emitSample, NOT illumSample) | |
| virtual int | nSamples () const |
Static Public Member Functions | |
| static light_t * | factory (paraMap_t ¶ms, renderEnvironment_t &render) |
Protected Attributes | |
| point3d_t | center |
| PFLOAT | radius |
| PFLOAT | square_radius |
| PFLOAT | square_radius_epsilon |
| color_t | color |
| includes intensity amplification! so... | |
| int | samples |
| unsigned int | objID |
| float | area |
| float | invArea |
sphere lights are *drumroll* lights with a sphere shape. They only emit light on the outside! On the inside it is somewhat pointless, because in that case, sampling from BSDF would _always_ be at least as efficient, and in most cases much smarter, so use just geometry with emiting material... The light samples from the cone in which the light is visible, instead of directly from the sphere surface (thanks to PBRT for the hint)
Definition at line 37 of file spherelight.cc.
| sphereLight_t::sphereLight_t | ( | const point3d_t & | c, | |
| PFLOAT | rad, | |||
| const color_t & | col, | |||
| CFLOAT | inte, | |||
| int | nsam | |||
| ) |
Definition at line 65 of file spherelight.cc.
| sphereLight_t::~sphereLight_t | ( | ) |
Definition at line 75 of file spherelight.cc.
| virtual bool sphereLight_t::canIntersect | ( | ) | [inline, virtual] |
Definition at line 50 of file spherelight.cc.
| virtual bool sphereLight_t::diracLight | ( | ) | const [inline, virtual] |
indicate whether the light has a dirac delta distribution or not
Implements light_t.
Definition at line 46 of file spherelight.cc.
| void sphereLight_t::emitPdf | ( | const surfacePoint_t & | sp, | |
| const vector3d_t & | wo, | |||
| float & | areaPdf, | |||
| float & | dirPdf, | |||
| float & | cos_wo | |||
| ) | const [virtual] |
get the pdf values for sampling point sp on the light and outgoing direction wo when emitting energy (emitSample, NOT illumSample)
unfinished! use real normal, sp.N might be approximation by mesh...
Reimplemented from light_t.
Definition at line 196 of file spherelight.cc.
| color_t sphereLight_t::emitSample | ( | vector3d_t & | wo, | |
| lSample_t & | s | |||
| ) | const [virtual] |
create a sample of light emission, similar to emitPhoton, just more suited for bidirectional methods
fill in s.dirPdf, s.areaPdf, s.col and s.flags, and s.sp if not NULL
Reimplemented from light_t.
Definition at line 215 of file spherelight.cc.
| light_t * sphereLight_t::factory | ( | paraMap_t & | params, | |
| renderEnvironment_t & | render | |||
| ) | [static] |
Definition at line 229 of file spherelight.cc.
| virtual bool sphereLight_t::illuminate | ( | const surfacePoint_t & | sp, | |
| color_t & | col, | |||
| ray_t & | wi | |||
| ) | const [inline, virtual] |
illuminate a given surfance point; Set ray to test visibility by integrator. Only for dirac lights.
Implements light_t.
Definition at line 49 of file spherelight.cc.
| float sphereLight_t::illumPdf | ( | const surfacePoint_t & | sp, | |
| const surfacePoint_t & | sp_light | |||
| ) | const [virtual] |
get the pdf for sampling the incoming direction wi at surface point sp (illumSample!)
this method requires an intersection point with the light (sp_light). Otherwise, use intersect()
Reimplemented from light_t.
Definition at line 186 of file spherelight.cc.
| bool sphereLight_t::illumSample | ( | const surfacePoint_t & | sp, | |
| lSample_t & | s, | |||
| ray_t & | wi | |||
| ) | const [virtual] |
illuminate a given surface point, generating sample s, fill in s.sp if not NULL; Set ray to test visibility by integrator
fill in s.pdf, s.col and s.flags
Implements light_t.
Definition at line 136 of file spherelight.cc.
| bool sphereLight_t::illumSample | ( | const surfacePoint_t & | sp, | |
| float | s1, | |||
| float | s2, | |||
| color_t & | col, | |||
| float & | ipdf, | |||
| ray_t & | wi | |||
| ) | const [virtual] |
Definition at line 103 of file spherelight.cc.
| void sphereLight_t::init | ( | scene_t & | scene | ) | [virtual] |
allow for preprocessing when scene loading has finished
Reimplemented from light_t.
Definition at line 77 of file spherelight.cc.
| bool sphereLight_t::intersect | ( | const ray_t & | ray, | |
| PFLOAT & | t, | |||
| color_t & | col, | |||
| float & | ipdf | |||
| ) | [virtual] |
Definition at line 169 of file spherelight.cc.
| virtual int sphereLight_t::nSamples | ( | ) | const [inline, virtual] |
Reimplemented from light_t.
Definition at line 54 of file spherelight.cc.
| color_t sphereLight_t::totalEnergy | ( | ) | const [virtual] |
total energy emmitted during whole frame
Implements light_t.
Definition at line 87 of file spherelight.cc.
float sphereLight_t::area [protected] |
Definition at line 62 of file spherelight.cc.
point3d_t sphereLight_t::center [protected] |
Definition at line 57 of file spherelight.cc.
color_t sphereLight_t::color [protected] |
includes intensity amplification! so...
Definition at line 59 of file spherelight.cc.
float sphereLight_t::invArea [protected] |
Definition at line 62 of file spherelight.cc.
unsigned int sphereLight_t::objID [protected] |
Definition at line 61 of file spherelight.cc.
PFLOAT sphereLight_t::radius [protected] |
Definition at line 58 of file spherelight.cc.
int sphereLight_t::samples [protected] |
Definition at line 60 of file spherelight.cc.
PFLOAT sphereLight_t::square_radius [protected] |
Definition at line 58 of file spherelight.cc.
PFLOAT sphereLight_t::square_radius_epsilon [protected] |
Definition at line 58 of file spherelight.cc.
1.6.1
