examples/features/zbuflines.shape

   1 /** This file is part of Shapes.
   2  **
   3  ** Shapes is free software: you can redistribute it and/or modify
   4  ** it under the terms of the GNU General Public License as published by
   5  ** the Free Software Foundation, either version 3 of the License, or
   6  ** any later version.
   7  **
   8  ** Shapes is distributed in the hope that it will be useful,
   9  ** but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  ** GNU General Public License for more details.
  12  **
  13  ** You should have received a copy of the GNU General Public License
  14  ** along with Shapes.  If not, see <http://www.gnu.org/licenses/>.
  15  **
  16  ** Copyright 2008, 2014 Henrik Tidefelt
  17  **/
  18
  19 ##lookin ..Shapes
  20 ##lookin ..Shapes..Geometry3D
  21
  22 leaf: \ a →
  23 (
  24   @nonstroking:[gray a / 360°]
  25   |
  26   [Geometry3D..rotate angle:a dir:(0,0,1)] [] [Graphics..fill (0.5cm,~4cm,0cm)--(2.5cm,~4cm,0cm)--(1.5cm,5cm,0.5cm)--cycle]
  27 )
  28
  29 stick: \ a →
  30 (
  31   @stroking:[gray a / 360°]
  32   |
  33   [Geometry3D..rotate angle:a dir:(0,0,1)] [] [Graphics..stroke (1.5cm,~4cm,0cm)--(1.5cm,5cm,0.5cm)]
  34 )
  35
  36 •zbuf: Graphics3D..newZBuf
  37
  38 •zbuf << [leaf 0°]
  39 •zbuf << [stick 120°]
  40 •zbuf << [stick 240°]
  41
  42 {
  43   p: (3cm,0cm,0cm)--(7cm,0cm,2cm)
  44   •zbuf << @nonstroking:[gray 0.7] | [Graphics..fill (8cm,~1cm,0cm)--(8cm,1cm,0cm)--(4cm,0cm,2cm)--cycle]
  45         << @nonstroking:[gray 0.3] | [Graphics..stroke p]
  46         << @nonstroking:[gray 0.3] | [shift (0.3cm,0cm,0cm)] [] [Graphics..stroke [p 2.5cm].p--p.end.p]
  47         << @nonstroking:[gray 0.3] | [shift (0.6cm,0cm,0cm)] [] [Graphics..stroke p.begin.p--(p.end-1.8cm).p]
  48         << @nonstroking:[gray 0.3] | [shift (0.9cm,0cm,0cm)] [] [Graphics..stroke [p 2.0cm].p--(p.end-1.8cm).p]
  49 }
  50
  51 tf: [Geometry3D..rotate (1,0,0) 60°]
  52 |**tf: [Geometry3D..affinetransform (0,4,7) (2,5,8) (3,6,9) (0cm,0cm,0cm)]
  53 zbuf: •zbuf;
  54 [view tf [] zbuf]