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Description of curves for light purposes
Curve definition
To keep it simple, we will only consider linear change. Because of this the light value can be described in required brightness at a given time. The value that the light had before that will then be adjusted smoothly, until it reaches the value intended at the next time point. The brightness at midnight must always be declared.
For example: We want the light to be on off during the night, then turn on at 6:00 in the morning with 20% and gradually increase in brightness until it reaches 100% at 8:00. Then, at 21:00 we want the light to start dimming until it turns off at 23:00. The following graph shows this:
Graph not yet available
The points should then be defined as follows:
0000 0.0
0600 0.0
0600 0.2
0800 1.0
2100 1.0
2300 0.0You will notice that two entries are at the same time here. This will make sure that the light stays at the same level during the duration from 0000 to 0600. When multiple entries are at the same time, the furthest down will be chosen.