I would like to please request the following feature: State Space Diagrams.
State Space Diagrams are not the same as UML State Diagrams, although they are similar. State Space Diagrams are often used to describe plants but don't believe they are UML. (But at least it could be the plant in PlantUML? 
) These are used in engineering in general, and especially electrical engineering and mechanical engineering.
State space diagrams are very, VERY, similar to the new activity-diagram-beta , but requires a couple of special shapes and cannot be curved like the activity-diagram-legacy.
- Must be rigid arrows and cannot be curved like the activity-diagram-legacy
- Shapes such as circles with different shapes inside them would also needed. Being able to specify where they connect, eg. from 0 to 100 percent of the first arrow or something.
- Special characters, such as dotted letters will need to be easily used too, both next to and inside of all objects.
- Some arrows would need to be connected at base and then separate if going to two different next blocks.
- Easily import or use some math scripting for the text of each block. It is common to have something like (1/s) as the text or a much larger polynomial.
- Different arrows, including width and connection type. Including attached to empty objects with labels, for the inputs and outputs.
Example 1:
From Wikipedia, here is an example diagram (https://en.wikipedia.org/wiki/State-space_representation).
Example 2:
This is another example state diagram. This time with arrows which are bolded, have rgb colours, and have widths around a character rather than a line. (Found with an image search using google.)
Example 3:
Another example state space diagram. This time using math symbols. (Found with an image search using google.)
Thank you
