Packages

velixir

0.0.2
0.0.7 0.0.6 0.0.5 0.0.4 0.0.3 0.0.2 0.0.1

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.

Current section

Files

Jump to
Readme
7 Versions
2 Dependencies
Dependants
Files
Activity
velixir lib velixir cylinder.ex
Raw

lib/velixir/cylinder.ex 

defmodule VElixir.Cylinder do

  use VElixir.Object

  alias VElixir.V



  def get_zoom(obj) do

    r = Map.get(obj, :radius)

    h = Map.get(obj, :height)

    cond do

      r || h ->

        r = r || 1

        Transform.scale(V.new(r, h || 1, r))

      :else ->

        nil

    end

  end



  def build_mesh(sliceCount \\ 30) do

    mesh = Mesh.new(__MODULE__)

      |> add_sides(sliceCount)

      |> add_face(0, sliceCount)

      |> add_face(1, sliceCount)

      |> Mesh.add_normals

    mesh

  end



  def add_face(mesh, y, sliceCount) do

    mesh = Mesh.push_vector_ring(mesh, y, 1, sliceCount)

    ring = mesh.recently_added

    center = Mesh.next_index(mesh)

    mesh

      |> Mesh.push_vector(V.new(0, y, 0))

      |> Mesh.push_fan([center | ring])

  end



  def add_sides(mesh, sliceCount) do

    mesh = Mesh.push_vector_ring(mesh, 0, 1, sliceCount)

    bottom = mesh.recently_added

    mesh = Mesh.push_vector_ring(mesh, 1, 1, sliceCount)

    top = mesh.recently_added

    Mesh.push_strip(mesh, bottom, top)

  end

end