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velixir

0.0.7
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VElixir is a simple to use primitive 3D graphics library. It offers great performance, and ease of use. VElixir was inspired by VPython, which makes basic 3D graphics in python trivial. Now it's just as easy to make 3D graphical visualizations in Elixir.

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velixir lib velixir arrow.ex
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lib/velixir/arrow.ex 

defmodule VElixir.Arrow do

  use VElixir.Object

  alias VElixir.{V, Cylinder, Cone}



  def export(obj, mesh_map) do

    dir = Map.get(obj, :dir) || V.new(0, 1, 0)

    len = V.mag(dir)

    if len > 0 do

      pos = Map.get(obj, :pos) || V.new(0, 0, 0)

      color = Map.get(obj, :color, Color.new)

      r1 = 0.03*:math.sqrt(len)

      r2 = r1*2

      h = r2*2

      cyl = %{vtype: Cylinder, pos: pos, dir: dir, height: len - h, radius: r1, color: color}

      cone = %{vtype: Cone, pos: V.add(dir, V.mult(V.norm(dir), -h)), dir: dir, height: h, radius: r2, color: color}

      Enum.map [cyl, cone], fn obj -> obj.vtype.export(obj, mesh_map) end

    else

      []

    end

  end



  def build_mesh(), do: nil

end