reanimate/examples/tut_glue_povray.hs
David Himmelstrup e90f93a0e2 Update tutorial.
Former-commit-id: f26d6e4164a5baf82671b8079981bfddc247a17c
2019-12-04 16:28:04 +08:00

101 lines
2.1 KiB
Haskell
Executable file

#!/usr/bin/env stack
-- stack runghc --package reanimate
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE QuasiQuotes #-}
module Main (main) where
import Reanimate
import Reanimate.Povray
import Reanimate.Raster
import Data.String.Here
import Data.Text (Text)
main :: IO ()
main = reanimate $ mkAnimation 5 $ \t ->
let s = fromToS 1 4 t in
mkGroup
[ mkBackground "black"
, povray [] (script (svgAsPngFile texture) s) ]
where
texture :: SVG
texture = checker 10 10
script :: FilePath -> Double -> Text
script png s = [iTrim|
//EXAMPLE OF SPHERE
//Files with predefined colors and textures
#include "colors.inc"
#include "glass.inc"
#include "golds.inc"
#include "metals.inc"
#include "stones.inc"
#include "woods.inc"
#include "shapes3.inc"
//Place the camera
camera {
//orthographic
perspective
// angle 50
location <0,-${max 0 (((s**1.5)-1)/16)},-3>
look_at <0,0,0>
//right x*image_width/image_height
up <0,9,0>
right <16,0,0>
}
//Ambient light to "brighten up" darker pictures
global_settings { ambient_light White*3 }
//Set a background color
//background { color White }
//background { color rgbt <0.1, 0, 0, 0> } // red
background { color rgbt <0, 0, 0, 1> } // transparent
polygon {
4,
//<-9, -4.5>, <-9, 4.5>, <9, 4.5>, <9, -4.5>
<0, 0>, <0, 1>, <1.777, 1>, <1.777, 0>
texture {
//pigment{ color rgb <0,0,1> }
pigment{
image_map{ png ${png} }
}
}
translate <-1.777/2,-0.5>
scale 9
}
|]
checker :: Int -> Int -> SVG
checker w h =
withFillColor "white" $
withStrokeColor "white" $
withStrokeWidth 0.1 $
mkGroup
[ withStrokeWidth 0 $
withFillOpacity 1 $ mkBackground "blue"
, mkGroup
[ translate (stepX*x-offsetX + stepX/2) 0 $
mkLine (0, -screenHeight/2*0.9) (0, screenHeight/2*0.9)
| x <- map fromIntegral [0..w-1]
]
,
mkGroup
[ translate 0 (stepY*y-offsetY) $
mkLine (-screenWidth/2, 0) (screenWidth/2, 0)
| y <- map fromIntegral [0..h]
]
]
where
stepX = screenWidth/fromIntegral w
stepY = screenHeight/fromIntegral h
offsetX = screenWidth/2
offsetY = screenHeight/2