/usr/share/doc/python-soya-doc/examples/modeling-transparency-1.py is in python-soya-doc 0.14-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 | #!/usr/bin/env python
# -*- coding: utf-8 -*-
# -*- indent-tabs-mode: t -*-
# Soya 3D tutorial
# Copyright (C) 2004 Jean-Baptiste LAMY
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
# modeling-transparency-1: Transparency : semi-transparent cubes
# In this lesson, we'll build a semi-transparent cube.
# Imports and inits Soya.
import sys, os, os.path, soya, soya.cube
soya.init()
soya.path.append(os.path.join(os.path.dirname(sys.argv[0]), "data"))
# Creates the scene.
scene = soya.World()
# Creates a material, and set its diffuse color to a semi-transparent white (alpha = 0.5).
# See lesson modeling-material-1.py about materials and material colors.
# Similarly, you can use per-vertex semi-transparent colors.
material = soya.Material()
material.diffuse = (1.0, 1.0, 1.0, 0.5)
# Creates a cube using our material.
cube_world = soya.cube.Cube(material = material)
# For optimization pupose, the cube module creates one-sided faces, i.e. only the exterior
# side of the faces are drawn, and not the interior side. Here, as the cube is
# semi-transparent, the interior side becomes visible and so we need to draw both sides.
# This is done by setting the face's double_sided attribute to 1.
for face in cube_world.children:
face.double_sided = 1
# Compile the cube model.
cube_model = cube_world.to_model()
# Creates several semi-transparent cubes.
cube1 = soya.Body(scene, cube_model)
cube1.set_xyz(-0.3, 0.3, 0.0)
cube1.rotate_y(30.0)
cube2 = soya.Body(scene, cube_model)
cube2.set_xyz(0.0, 0.0, -1.5)
cube2.rotate_y(30.0)
cube3 = soya.Body(scene, cube_model)
cube3.set_xyz(0.6, -0.4, 0.5)
cube3.rotate_y(30.0)
# Creates a light.
light = soya.Light(scene)
light.set_xyz(1.0, 0.7, 1.0)
# Creates a camera.
camera = soya.Camera(scene)
camera.set_xyz(0.0, 0.0, 3.0)
soya.set_root_widget(camera)
soya.MainLoop(scene).main_loop()
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