Laws are very useful when it comes to wanting to control something that has a known variance in it. For example, if I were a designer and needed a linear surface that begins at one angle at one end of the guide curve and ends with a different angle. Without the ability to do this, you would have to create two surfaces and do some sort of transition surface in between them. In this video below, I will run a linear surface using a simple law on the angle value to take it from 15 degrees and one end to 45 degrees at the other end.
In this case I used a linear style law, and as you see, when I looked at the surface from a plan view (from above) the angle direction was linear from the 15 deg to the 45 deg. Below, I will show what would have happened if I had done it as an “S Type” law by modifying the law.
In the image below you can see them if they are overlayed over each other. The surface highlighted is the S Type law and as you can see it definitely has an “S” shape for the transition in between the 2 knows angles.
You’re probably thinking, “What if I wanted a specific angle somewhere in the middle of the transition?” This gets a little trickier. In that case you would use an Advanced Law.
In order to used the advanced type law, you have to first develop it. The easiest way I have found to do this is with a sketch. In the example below, I am showing what the sketch would look like for the original linear law. […]