Class infinite_emitter_t¶

Defined in File infinite_emitter.hpp

Inheritance Relationships¶

Base Type¶

public wt::emitter::emitter_t (Class emitter_t)

Derived Type¶

public wt::emitter::directional_t (Class directional_t)

Class Documentation¶

class infinite_emitter_t : public wt::emitter::emitter_t ¶

Generic interface for infinite emitters. Sampling of infinite emitters is slightly different compared with regular emitters. During construction, wt::scene_t populates the scene-wide bounding AABB world_aabb of all infinite emitters. The infinite emitters’ sampling API changes as follows:

wt::emitter::emitter_t::sample_position() and wt::emitter::emitter_t::pdf_position() are unused and return 0.
wt::emitter::emitter_t::sample() samples with respect to positions within the world_aabb, and not with respect to positions upon the emitter.
An alternative density query wt::emitter::infinite_emitter_t::pdf_target_position() provides the area sampling density for sampled world positions.

Subclassed by wt::emitter::directional_t

Public Functions

inline infinite_emitter_t(std::string id, f_t emitter_phase_space_extent_scale = 1)¶

infinite_emitter_t(const infinite_emitter_t&) = default¶

infinite_emitter_t(infinite_emitter_t&&) = default¶

inline virtual bool is_infinite_emitter() const noexcept final¶

virtual area_sampling_pd_t pdf_target_position(const pqvec3_t &wp) const noexcept = 0¶

Sampling area PDF of a target scene position, sampled by the infinite emitter’s sample().

Parameters:: wp – sampled scene position

inline virtual position_sample_t sample_position(sampler::sampler_t &sampler) const noexcept final¶: Samples an emission phase-space position (ray) on the light source. Not implemented for infinite emitters.

inline virtual area_sampling_pd_t pdf_position(const pqvec3_t &p, const intersection_surface_t *surface = nullptr) const noexcept final¶: Sampling PDF of an emission position on the light source. Not implemented for infinite emitters.

Protected Functions

inline virtual void set_world_aabb(const aabb_t &waabb) noexcept¶

Protected Attributes

aabb_t world_aabb = aabb_t::null()¶

Friends

friend class wt::scene_t