-- Implicit CAD. Copyright (C) 2011, Christopher Olah (chris@colah.ca)
-- Released under the GNU AGPLV3+, see LICENSE

module Graphics.Implicit.Export.Render.Definitions (TriSquare(Tris, Sq)) where

import Prelude()

import Graphics.Implicit.Definitions(ℝ, ℝ2, ℝ3, Triangle)

import Control.DeepSeq (NFData, rnf)

-- We want a format that can represent squares/quads and triangles.
-- So that we can merge squares and thereby reduces triangles.

-- Regarding Sq: Sq Basis@(b1,b2,b3) (Height on b3)
--                  (b1 pos 1, b2 pos 1) (b1 pos 2, b2 pos 2)

data TriSquare =
      Sq (ℝ3,ℝ3,ℝ3) ℝ ℝ2 ℝ2
    | Tris [Triangle]

-- For use with Parallel.Strategies later

instance NFData TriSquare where
    rnf (Sq b z xS yS) = rnf (b,z,xS,yS)
    rnf (Tris tris) = rnf tris