UV transform¶
-
class transform_t : public wt::texture::texture_t
Affine transforms the UV texture coordinates before sampling an underlying texture.
Public Functions
-
transform_t(transform_t&&) = default
-
virtual ~transform_t() noexcept = default
-
inline const auto *get_nested_texture() const noexcept
-
inline virtual bool needs_interaction_footprint() const noexcept override
Returns TRUE for textures that make use of the surface interaction footprint data.
-
inline virtual vec2_t resolution() const noexcept override
Returns texture resolution represented via \( \frac{\text{texels}}{\vec{uv}} \). May return an approximation. Can be infinite, e.g., for analytic textures. Can be 1, for constant textures.
-
inline virtual std::shared_ptr<spectrum::spectrum_real_t> mean_spectrum() const noexcept override
Average spectrum of the texture. Returns
nullptrwhen an average spectrum cannot be computed.
-
inline virtual std::optional<f_t> mean_value(wavenumber_t k) const noexcept override
Average value of the texture. Returns std::nullopt when an average value cannot be computed.
-
inline virtual vec4_t get_RGBA(const texture_query_t &query) const noexcept override
Samples the texture. Returns filtered RGBA data, without spectral upsampling. Ignores
query.k. Only relevant for some textures.
-
inline virtual vec2_t f(const texture_query_t &query) const noexcept override
Samples the texture. Returns spectrally upsampled (to wavenumber
query.k) result.- Returns:
Spectral luminance value and alpha (if any) pair.
-
virtual scene::element::info_t description() const override
Public Static Functions
-
static std::unique_ptr<texture_t> load(std::string id, scene::loader::loader_t *loader, const scene::loader::node_t &node, const wt::wt_context_t &context)
-
transform_t(transform_t&&) = default