# 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_shape = cube_world.shapify() # Creates several semi-transparent cubes. cube1 = soya.Volume(scene, cube_shape) cube1.set_xyz(-0.3, 0.3, 0.0) cube1.rotate_lateral(30.0) cube2 = soya.Volume(scene, cube_shape) cube2.set_xyz(0.0, 0.0, -1.5) cube2.rotate_lateral(30.0) cube3 = soya.Volume(scene, cube_shape) cube3.set_xyz(0.6, -0.4, 0.5) cube3.rotate_lateral(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.Idler(scene).idle()