# Vertice operations.

# **Vertice** is a utility class to help with vertice operations. A vertice
# is implemented as a 2-element array. Element 0 is *x* and element 1 is *y*.

# Translate a vertice from an origin point using rotation and scale.
export translate = (v, origin, rotation = 0, scale = 1) ->

  difference = [v[0] - origin[0], v[1] - origin[1]]
  magnitude = scale * Math.sqrt(
    difference[0] * difference[0] + difference[1] * difference[1]
  )
  rotation += Math.atan2 difference[1], difference[0]

  return [
    origin[0] + Math.cos(rotation) * magnitude
    origin[1] + Math.sin(rotation) * magnitude
  ]