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light_spot
Description
An object that defines properties of a spot light source.
Parent Objects
Properties
| Name | Description | Default | Required |
|---|---|---|---|
| intensity | Light intensity, in the [0, 1] range | 1.0 | no |
| shadow_type | Type of shadowing to use for this light. Valid values are “none”, “shadow_map”, and “raytraced”. | “none” | no |
| shadow_softness | If the light casts shadows, this is the softness factor to apply to the shadow. | 0.0 | no |
| shadow_bias | For shadow mapped shadows, this is the shadow bias. | 1.0 | no |
| constant_attenuation | See Details | 1.0 | no |
| linear_attenuation | See Details | 0.0 | no |
| quadratic_attenuation | See Details | 0.0 | no |
| falloff_angle | See Details | 180.0 degrees | no |
| falloff_exponent | See Details | 0.0 | no |
Details
The constant_attenuation, linear_attenuation, and quadratic_attenuation are used to calculate the total attenuation of this light given a distance. The equation used is:
color_scaling = constant_attenuation + ( Dist * linear_attenuation ) + (( Dist^2 ) * quadratic_attenuation )
The falloff_angle and falloff_exponent are used to specify the amount of attenuation based on the direction of the light.
Example
{
"intensity" : 0.34,
"shadow_type" : "shadow_map",
"shadow_softness" : 3.0,
"shadow_bias" : 2.8,
"constant_attenuation" : 0.8,
"falloff_angle" : 25.0
}
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Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution 3.0 Unported
