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# -*- 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
# raypicking-1: Laser
# This lesson includes a red laser ray and 3 rotating cubes.
# Move the mouse to move the laser.
# In particular, lasers have been used while testing raypicking function.
# BTW, the laser code (in soya/laser.py) is fully in Python and uses less that 60 lines
# of code, so you might want to take a look at it.
import sys, os, os.path, soya, soya.cube, soya.laser, soya.sdlconst
soya.init()
soya.path.append(os.path.join(os.path.dirname(sys.argv[0]), "data"))
# Creates the scene.
scene = soya.World()
# Adds 3 rotating cubes in it (see basic-2.py about rotating volume).
cube_world = soya.cube.Cube()
cube_shape = cube_world.shapify()
class RotatingCube(soya.Volume):
def __init__(self, parent, angle_speed):
soya.Volume.__init__(self, parent, cube_shape)
self.angle_speed = angle_speed
def advance_time(self, proportion):
self.rotate_z(0.2 * proportion * self.angle_speed)
cube_1 = RotatingCube(scene, 5.0)
cube_1.set_xyz(-1.1, 0.5, 0.0)
cube_2 = RotatingCube(scene, -5.0)
cube_2.set_xyz(-1.5, -1.5, 0.0)
cube_3 = RotatingCube(scene, 5.0)
cube_3.set_xyz(1.1, -0.5, 0.0)
cube_3.scale(0.5, 0.5, 0.5)
# Adds a light.
light = soya.Light(scene)
light.set_xyz(0.0, 0.2, 1.0)
# Creates a camera.
camera = soya.Camera(scene)
camera.set_xyz(0.0, -1.0, 3.0)
soya.set_root_widget(camera)
# Hide the mouse cursor
soya.cursor_set_visible(0)
# MouseLaser is a subclass of laser that is controlled by the mouse.
class MouseLaser(soya.laser.Laser):
def begin_round(self):
soya.laser.Laser.begin_round(self)
# Processes the events
for event in soya.process_event():
if event[0] == soya.sdlconst.MOUSEMOTION:
# For mouse motion event, rotate the laser (quite) toward the mouse.
# The formulas are empirical; see soya.cursor for a better algorithm
# if you want to translate mouse positions into 3D coordinates.
mouse = soya.Point(
scene,
(float(event[1]) / camera.get_screen_width () - 0.5) * 4.0,
(float(event[2]) / camera.get_screen_height() - 0.5) * -4.0,
0.0,
)
self.look_at(mouse)
# Creates a red mouse-controlled laser, which reflect on walls.
# You can change the laser color with laser.color = (r, g, b, a).
laser = MouseLaser(scene, reflect = 1)
laser.y = -2.5
scene.x = 1.0
# Main loop
soya.Idler(scene).idle()
# TODO (left as an exercice):
# Turn this tutorial lesson into a full game, where the player must shoot
# with the laser a specific target (or monsters).
# The levels includes different moving and rotating obstacles.
# A multiplayer version uses two laser, one for each player, and two targets.
# Hint :
# the laser.points list contains all the points that define the laser trajectory.
# use laser.color to change the color of the laser.
# Good luck!
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