Vkm::Engine::Light Struct Reference

Component representing a light source in the scene. More...

#include <light.h>

Public Attributes
float	radius = 10.0f
	Attenuation cutoff (point/spot/area)
float	innerConeAngle = 0.5f
	Spot: full-brightness cone, radians.
float	outerConeAngle = 0.785f
	Spot: falloff edge, radians.
float	areaWidth = 1.0f
	Rect width along the local X axis.
float	areaHeight = 1.0f
	Rect height along the local Y axis.
float	areaRadius = 0.5f
	Disk radius.
bool	twoSided = false
	Area lights: emit from both faces.
float	shadowBias = 0.005f
	Depth comparison bias, grown at grazing light.
float	shadowNormalBias = 1.5f
	Directional and spot: normal offset before the depth compare, in shadow texels (0..4).
float	shadowDistance = 100.0f
	Directional only: world distance the cascades cover.
float	sourceRadius = glm::radians(0.5f)
	How large the light's source is, which is how soft its shadows are.

Detailed Description

Component representing a light source in the scene.

Pose comes from the Transform. Area lights emit along -direction (a spot along +direction); their intensity is point-equivalent, so from afar they light like a point light of the same intensity.

Member Data Documentation

shadowBias

float Vkm::Engine::Light::shadowBias = 0.005f

Depth comparison bias, grown at grazing light.

Directional: a cascade depth, scaled with slope. Spot/point: a fraction of the range slid toward the light - twice this at grazing, two fifths head-on.

shadowNormalBias

float Vkm::Engine::Light::shadowNormalBias = 1.5f

Directional and spot: normal offset before the depth compare, in shadow texels (0..4).

Tripled at grazing light. Point lights take none.

sourceRadius

float Vkm::Engine::Light::sourceRadius = glm::radians(0.5f)

How large the light's source is, which is how soft its shadows are.

Directional: angular radius in radians (the sun is about 0.0047), also sizing its highlight. Spot: emitter radius in metres. 0 is hard. Point shadows ignore it; the sky's drawn sun is sized by SkySettings.

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

• ecs/component/render/light.h