Vkm::Engine::MaterialAsset Struct Reference

A complete PBR material. More...

#include <material_asset.h>

Inheritance diagram for Vkm::Engine::MaterialAsset:

Public Attributes
float	alphaCutoff = 0.5f
	AlphaMask: discard below this albedo alpha (glTF default 0.5)
glm::vec4	albedo = {1,1,1,1}
	Base color (RGB) + opacity (A; Transparent type blends on it)
float	metallic = 0.0f
float	roughness = 0.5f
	Surface roughness (0: smooth, 1: rough); GGX alpha = roughness^2.
float	ior = 1.5f
float	ao = 1.0f
	Ambient occlusion factor on indirect light (0: occluded, 1: open)
float	normalScale = 1.0f
	Normal map intensity (0: flat, 1: as authored, >1: exaggerated)
glm::vec3	emission = {0,0,0}
	Emissive color (RGB), linear.
float	emissiveStrength = 1.0f
	HDR multiplier on emission.
float	clearcoat = 0.0f
	Clearcoat layer strength (0: none, 1: full); attenuates the base layer.
float	clearcoatRoughness = 0.0f
	Clearcoat lobe roughness (0: smooth, 1: rough)
float	anisotropy = 0.0f
	Anisotropy strength (0: isotropic, 1: fully anisotropic)
glm::vec3	anisotropyDirection = {1,0,0}
	Anisotropy direction (tangent space)
glm::vec3	sheenColor = {0,0,0}
	Sheen tint, Charlie lobe (0 = disabled); cloth / velvet.
float	sheenRoughness = 0.3f
	Sheen lobe roughness.
float	subsurface = 0.0f
	Subsurface scattering strength; skin / wax / leaves.
glm::vec3	subsurfaceColor = {1,1,1}
	Subsurface color tint.
float	transmission = 0.0f
	Fraction of light refracted instead of diffused (0: opaque, 1: glass)
float	thicknessFactor = 0.0f
	Volume thickness in metres (0: thin-walled, no absorption)
float	attenuationDistance = 1.0f
	Path length at which radiance reaches attenuationColor (m)
glm::vec3	attenuationColor = {1,1,1}
	Transmittance after one attenuationDistance (white = no tint)
float	heightScale = 0.0f
	Parallax-occlusion depth scale (0: off; 0.02-0.1 typical)

Additional Inherited Members
Public Member Functions inherited from Vkm::Engine::Resource
	Resource (const Resource &other)
	Duplicate other's contents and name, but not its identity.
const std::string &	name () const noexcept
	Serializable identity; non-empty and unique within its type once added.
uint64_t	uid () const noexcept
	Process-unique id stamped by add(); names the asset, not the slot it sits in.
uint64_t	version () const noexcept
	Change counter the backend keys GPU re-uploads on; moved by commit().
bool	isHidden () const noexcept
	Added by ResourceManager::addPrivate: not user-facing, not saved.
nlohmann::json &	sourceJson ()
	Mutable source JSON, allocating a null document if there is none.
const nlohmann::json &	sourceJson () const
	Const source JSON; asserts hasSource(), so guard the call with it.

Detailed Description

A complete PBR material.

The Disney/glTF principled model; each scalar multiplies its map when one is bound. Fields here and shader support move in lockstep.

Member Data Documentation

metallic

float Vkm::Engine::MaterialAsset::metallic = 0.0f

Metalness (0: dielectric, 1: metallic)

ior

float Vkm::Engine::MaterialAsset::ior = 1.5f

Index of refraction; dielectric F0 = ((ior-1)/(ior+1))^2

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The documentation for this struct was generated from the following file:

• resource/asset/material_asset.h