How would I calculate...

How would I calculate the following shapes?

- triangle.
- rectangle.
- parallelogram.
- pentagram.

If calculate means find the co-ordinates of the vertices; offset by angle from vertex to vertex.

You might want to be a little more specific, Vestras. How do you want to use the shapes?

I want to create a shape with lines of special effects, like:

If you're referring to making that shape around a particular point, you would simply take the point and calculate the offset at varying units of pi (WC3 takes radians in all of its functions.

So a triangle would be the distance (depending on how big you want the shape) at the offsets: pi/2, 5pi/4, and 7pi/4

http://i174.photobucket.com/albums/w...9/circle-1.gif

Each of those forms a triangle, then you would connect each of them once you find their points (locations or x/y values, the latter would be better I think)

What?

Triangle: polar offset; X distance (120 deg, 240 deg, 0 deg)
Rectangle: normal offset (cartesian); P(length/2, height/2), Q(length/2, -height/2), R(-length/2, -height/2), S(-length/2, height/2)
Parallelogram:polar offset; X distance (angle A, angle A + 180), Y distance (angle A + 90, angle A - 90)
Pentagram: polar offset; X distance (72 deg, 144 deg, 216 deg, 288 deg, 0 deg)

Descriptive enough?

You can use vector inequalities if you want, but im not sure if they are supported