# -*- indent-tabs-mode: t -*- # Soya 3D tutorial # Copyright (C) 2001-2004 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-3: Vertex colors : the multicolor pyramid # Models can be designed in Blender and then imported in Soya (as in lesson basic-1.py), # but you can also create them from scratch, using Soya primitive. Learning this is # the purpose of the modeling-* tutorial series. # In this lesson, we'll build a pyramid, made of a quad base and 4 triangles. # Imports and inits Soya. import sys, os, os.path, soya soya.init() soya.path.append(os.path.join(os.path.dirname(sys.argv[0]), "data")) # Creates the scene. scene = soya.World() # Creates the World that will contain the pyramid. We don't create the pyramid in the # scene since we are going to compile the pyramid into a model. pyramid_world = soya.World() # This time, we create the 5 vertices first. We do so to be sure each vertex will have # the same color on the different faces it belongs to ; though you can still use the way # we use in lesson modeling-1.py. # The diffuse attribute of vertex is the color of the vertex ; in Soya, colors are # (red, green, blue, alpha) tuples where all components are usually in the range 0.0-1.0. # Set diffuse to None to disable vertex color. # Here, the apex of the pyramid is in white, the base1 vertex is red, base2 is yellow, # base3 is green and base4 is blue. apex = soya.Vertex(pyramid_world, 0.0, 0.5, 0.0, diffuse = (1.0, 1.0, 1.0, 1.0)) base1 = soya.Vertex(pyramid_world, 0.5, -0.5, 0.5, diffuse = (1.0, 0.0, 0.0, 1.0)) base2 = soya.Vertex(pyramid_world, -0.5, -0.5, 0.5, diffuse = (1.0, 1.0, 0.0, 1.0)) base3 = soya.Vertex(pyramid_world, -0.5, -0.5, -0.5, diffuse = (0.0, 1.0, 0.0, 1.0)) base4 = soya.Vertex(pyramid_world, 0.5, -0.5, -0.5, diffuse = (0.0, 0.0, 1.0, 1.0)) # Now, creates the face, using the vertices we creates above. soya.Face(pyramid_world, [base1, base2, base3, base4]) soya.Face(pyramid_world, [base2, base1, apex]) soya.Face(pyramid_world, [base4, base3, apex]) soya.Face(pyramid_world, [base1, base4, apex]) soya.Face(pyramid_world, [base3, base2, apex]) # Compile the pyramid into a model. pyramid_model = pyramid_world.to_model() # Creates a subclass of Body that permanently rotates. # See the timemanagement-* lesson series for more info. class RotatingBody(soya.Body): def advance_time(self, proportion): self.rotate_y(2.0 * proportion) # Create a rotating body in the scene, using the cube model. pyramid = RotatingBody(scene, pyramid_model) pyramid.rotate_x(60.0) # Creates a light. light = soya.Light(scene) light.set_xyz(1.0, -1.0, 2.0) # Creates a camera. camera = soya.Camera(scene) camera.set_xyz(0.0, 0.0, 2.0) soya.set_root_widget(camera) soya.MainLoop(scene).main_loop()