noise_cloud¶
- noise_cloud <name> <type> … end_noise_cloud¶
noise_cloud <name> <type> noise_frequency ... noise_octaves ... threshold ... scalar ... constant_height ... thickness ... use_global_wind origin ... sensor_modifier ... comm_modifier ... end_noise_cloud
Overview¶
The noise_cloud block defines a pseudo-random fractal noise cloud layer. This layer will attenuate comm and sensor. The random_seed with affect the population of the noise function. If a line-of-sight check hits a cloud, a penetration distance is returned, which in turn is used to calculate the attenuation of the device by the clouds. The base type is WSF_NOISE_CLOUD.
Commands¶
- noise_frequency <value>¶
Specifies the number of posts defined in the noise function at the lowest octave. Higher noise frequency will result in more unique clouds in the function.
Default 1
- noise_octaves <value>¶
Specifies the number of octaves defined in the noise function. Each octave adds higher frequency and lower amplitude noise to the noise function. Higher octaves will result in more fractal detail. The table below visually demonstrates the effects of noise_frequency and noise_octaves.
Default 1
Frequency vs Octaves |
f=1 |
f=2 |
f=3 |
f=4 |
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O=1 |
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O=2 |
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O=3 |
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O=4 |
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- threshold <value>¶
Specifies the threshold of a step function applied to the noise function. Every noise function point above the threshold will be considered cloud, and everything below will be clear sky. The table below visually demonstrates the effect of the threshold.
Default 0.5
Threshold |
f=0.2 |
f=0.3 |
f=0.4 |
f=0.5 |
f=0.6 |
f=0.7 |
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- scalar <length-value>¶
The 3D noise function is cyclical. The scalar value will determine the frequency of the repetition.
Default 10 km
- constant_height <length-value>¶
The constant_height determines how high above sea level the cloud layer will be set.
Default 10 km
- thickness <length-value>¶
When a sensor or comm beam intersects a cloud in the layer, this value will be returned as the penetration length.
Default 300 m
- use_global_wind¶
When this is set, the cloud layer will use the wind_speed and wind_direction defined in the global_environment.
- origin <latitude-value> <longitude-value>¶
Defines the wind origin for the cloud. The wind direction will be most correct around this location.
Default 0n 0e
- sensor_modifier <name> <value>¶
This defines the attenuation effect of a cloud hit. sensor devices will indicate they will be attenuated by the cloud layer by using the modifier_category command in their definitions. The value is a number 0 - 1. The attenuation value is set up to be a percentage loss per meter within the zone.
- comm_modifier <name> <value>¶
This defines the attenuation effect of a cloud hit. comm devices will indicate they will be attenuated by the cloud layer by using the modifier_category command in their definitions. The value is a number 0 - 1. The attenuation value is set up to be a percentage loss per meter within the zone.
