syntax function

hello!

I have a list of vectors (x,y,z) i.e. (1.88,7.43,0.0)

and i want to make them operate as variables in this function:

f() = ( ((x)e-1) , ((y)e-1) , ((z)e-1) )

i always get a syntax error because i have never known how to write correctly functions on grasshopper

could someone please explain me the syntax rules?

thanks in advanced,

gabriel

Replies to This Discussion

Permalink Reply by David Rutten on March 3, 2013 at 1:04pm

The Grasshopper expression language is based on VBScript. It has a bunch of added operators and symbols specifically for 3D operations.

I believe the expression you're looking for is:

{p.x * e - 1, p.y * e - 1, p.z * e - 1}

Where p is a variable of type point (or vector). The curly brackets are used to create a new vector. If you only put two numbers in between curly brackets you'll create a Complex number instead. It's also possible to use the multiplier operator directly on vectors:

(p * e) - {1,1,1}

If you multiply a vector/point by a number it amounts to multiplying all coordinates with that number.

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by Gabriel Áh on March 3, 2013 at 1:48pm

Thank you David,

Now i got another question,

As i understand then, i would need to double click on the VBscript component and type my function? or how does it work?

sorry to bother, is just that i really do not understand

gabriel

Permalink Reply by David Rutten on March 3, 2013 at 2:20pm

The Script component use proper VB.NET and C# code. The Expression and Evaluate components use Grasshopper expression language. You'll find all four of them in the Math Tab, Script panel.

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by Chris Tietjen on March 3, 2013 at 4:49pm