SceneGraphLightSource

Inherits LightSource

This LightSource type represents a light source placed at the position of a scene graph node. That is, the direction of the light will follow the position of an existing object in the scene. It will also update dynamically as the object moves.

Note that the brightness of the light from the light source does not depend on the distance between the two scene graph nodes. Only the Intensity value has an impact on the brightness.

Members

Name	Documentation	Type	Description	Optional
Node	The identifier of the scene graph node to follow.	Identifier	An identifier string. May not contain ‘.’, spaces, newlines, or tabs	No
Intensity	The intensity of this light source.	Double	Value of type ‘Double’	Yes

Inherited members from LightSource

Name	Documentation	Type	Description	Optional
Identifier	The identifier of the light source.	Identifier	An identifier string. May not contain ‘.’, spaces, newlines, or tabs	No
Type	The type of light source that is described in this element.	String	Must name a valid LightSource type	No
Enabled	Whether the light source is enabled or not.	Boolean	Value of type ‘Boolean’	Yes

Asset Examples

local sunTransforms = asset.require("scene/solarsystem/sun/transforms")
local transforms = asset.require("./transforms")



local model = asset.resource({
  Name = "JUICE Model",
  Type = "HttpSynchronization",
  Identifier = "juice_models",
  Version = 1
})


local JuiceModel = {
  Identifier = "JuiceModel",
  Parent = transforms.Juice.Identifier,
  Transform = {
    Translation = {
      Type = "StaticTranslation",
      -- Offset numbers found by eyeballing
      Position = { 4.5, 0.0, -1.0 }
    },
    Rotation = {
      Type = "StaticRotation",
      Rotation = { math.pi / 2.0, 0.0, 0.0 }
    }
  },
  Renderable = {
    Type = "RenderableModel",
    GeometryFile = model .. "juice.fbx",
    ModelScale = "Centimeter",
    LightSources = {
      {
        Type = "SceneGraphLightSource",
        Identifier = "Sun",
        Node = sunTransforms.SolarSystemBarycenter.Identifier,
        Intensity = 0.6
      },
      {
        Identifier = "Camera",
        Type = "CameraLightSource",
        Intensity = 0.4,
        Enabled = false
      }
    }
  },
  GUI = {
    Name = "Juice Model",
    Path = "/Solar System/Missions/Juice",
    Description = "The model of the JUICE spacecraft"
  }
}


asset.onInitialize(function()
  openspace.addSceneGraphNode(JuiceModel)
end)

asset.onDeinitialize(function()
  openspace.removeSceneGraphNode(JuiceModel)
end)

asset.export(JuiceModel)



asset.meta = {
  Name = "Juice Model",
  Description = [[
    The model of the JUICE spacecraft. The model file was taken from
    https://www.cosmos.esa.int/web/esac-cmso/scifleet.
  ]],
  Author = "OpenSpace Team",
  URL = "http://openspaceproject.com",
  License = "MIT license"
}