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# Copyright (C) 2001-2002 Jean-Baptiste LAMY
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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# Lesson 007: Worlds : a solar system
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# This lesson is about grouping object. It explains how to include an object
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# (called the child) inside an other (called the parent), so as moving the parent
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# will move its children.
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import sys, soya, soya.soya3d as soya3d, soya.model as model, soya.sphere as sphere
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scene = soya3d.World()
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import os, os.path, sys
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model.Image.PATH = os.path.join(os.path.dirname(os.path.abspath(sys.argv[0])), "data", "images")
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# Creates the sun's material
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fire = model.Material()
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fire.tex_filename = "lava.png"
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# The sun is inserted inside the scene
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# The soya.sphere module works in a similar way than soya.cube.
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sun = soya3d.World(scene)
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sun.set_shape(sphere.Sphere(None, fire).shapify())
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# Creates the earth's material
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ground = model.Material()
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ground.diffuse = (0.4, 0.7, 1.0, 1.0)
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# The earth is inserted inside the sun !
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# This implies than moving / rotating the sun moves the earth too!
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earth = soya3d.World(sun)
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earth.set_shape(sphere.Sphere(None, ground).shapify())
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earth.scale(0.6, 0.6, 0.6)
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# Creates the moon's material
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crater = model.Material()
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crater.diffuse = (0.4, 0.4, 0.4, 1.0)
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# The moon is inserted inside the earth !
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# This implies than moving / rotating the sun and/or the earth moves the moon too!
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moon = soya3d.World(earth)
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moon.set_shape(sphere.Sphere(None, crater).shapify())
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moon.scale(0.4, 0.4, 0.4)
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light = soya3d.Light(scene)
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light.set_xyz(0.0, 0.2, 2.0)
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camera = soya3d.Camera(scene)
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soya.set_root_widget(camera)
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# Makes it less simetric !
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sun .turn_lateral (25.0)
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earth.turn_vertical(35.0)
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sun .turn_incline(3.0)
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earth.turn_incline(5.0)
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moon .turn_incline(3.0)
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# The Soya object hierarchy is different to the branching philosophy used by
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# several other 3D engine (such as java 3D).
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# It can be compared to an UNIX file system:
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# - Worlds are directories
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# - Faces, Lights, Cameras,... are files
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# - Volumes behave like (soft) links (to a directory): they can be used to have
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# the same directory at different location (exactely like, e.g., /usr/src/linux
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# is a link to /usr/src/linux-2.4.19-16mdk/ on my Linux file system).
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# A World behaves exactely as a list (and technically it IS A list): you can use
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# the append, remove,... methods, and use a World in a "for" loop
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# (e.g.: for child in world: print child)
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# Additionnal methods include:
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# - world.recursive() : returns a list of ALL the children in this world,
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# including children of its children, and so forth (e.g. sun.recursive()
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# contains the earth but also the moon).
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# Each 3D object can have a "name" property, which may be used to find them.
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# The following methods deals with names:
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# - world[name], world.__getitem__(name) : gets the child of the given name
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# - world.search(name_regexp) : gets all the children whose name match the
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# - world.search_all(name_regexp) : like search, but recursively.
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# - world.subitem(name_path) : like __getitem__, but name_path may be composed
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# of several names, separated by dots: "child.sub_child.leaf".
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# You can get the World which contains a 3D object by using its "parent" property.
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# The get_root() method returns the parent's parent's parent... and so forth
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# (= often called "scene" in tutorials)
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tutorial/lesson-007.py
