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# -*- indent-tabs-mode: t -*-
# Soya 3D
# Copyright (C) 2001-2002 Jean-Baptiste LAMY -- jiba@tuxfamily.org
#
# 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
"""soya.laser
Provide a Laser -- a red ray that starts at a given position in a given
direction, and ends when it encounter something.
See tutorial lesson 105.
Usefull to debug raypicking !
Properties:
- color: the color of the ray
- reflect: true (1) if you want the laser to be reflected on wall (default to false)"""
from soya import PythonCoordSyst, Point, Vector, DEFAULT_MATERIAL
from soya.opengl import *
class Laser(PythonCoordSyst):
def __init__(self, parent = None, color = (1.0, 0.0, 0.0, 1.0), reflect = 0):
PythonCoordSyst.__init__(self, parent)
self.color = color
self.reflect = reflect
self.points = []
def batch(self):
if self.color[3] < 1.0: return 2, self, None
else: return 1, self, None
def render(self):
DEFAULT_MATERIAL.activate()
glDisable(GL_TEXTURE_2D)
glDisable(GL_LIGHTING)
glColor4f(*self.color)
glBegin(GL_LINES)
glVertex3f(0.0, 0.0, 0.0)
self.points = []
i = 0
pos = self.position()
direc = Vector(self, 0.0, 0.0, -1.0)
raypicker = self.get_root()
while direc and (i < 50):
i = i + 1
impact = raypicker.raypick(pos, direc, -1.0)
if not impact:
pos = pos + (direc * 32000.0)
direc = None
else:
pos = impact[0]
if self.reflect:
normal = impact[1] % self
normal.normalize() # changing coordsys can alterate normal size
normal.set_length(-2.0 * direc.dot_product(normal))
direc = normal + direc
else: direc = None
glVertex3f(*self.transform_point(pos.x, pos.y, pos.z, pos.parent))
if direc: glVertex3f(*self.transform_point(pos.x, pos.y, pos.z, pos.parent))
self.points.append(pos)
glEnd()
glEnable(GL_LIGHTING)
glEnable(GL_TEXTURE_2D)
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