"""
Edward Dale
2006-1-30
Animation Algorithms
Particle System

Copyright (c) 2006, Edward Dale
All rights reserved.

Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice, this
  list of conditions and the following disclaimer.

* Redistributions in binary form must reproduce the above copyright notice,
  this list of conditions and the following disclaimer in the documentation
  and/or other materials provided with the distribution.

* Neither the name of Edward Dale nor the names of its contributors
  may be used to endorse or promote products derived from this software
  without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""

from particles import *
from keyframe import *
from cgkit.all import *
from math import *

def keypress(evt):
    """
    Respond to keypresses.
    """
    global sys
    if evt.keycode == KEY_UP:
        sys.avggenrate += 5
    elif evt.keycode == KEY_DOWN:
        sys.avggenrate -= 5
    elif evt.keycode == KEY_LEFT:
        sys.lifetimeavg -= 1
    elif evt.keycode == KEY_RIGHT: 
        sys.lifetimeavg += 1
    elif evt.key == ' ':
        sys.pause = not sys.pause
    elif evt.key == 'S' or evt.key=='s':
        sys.shrinking = not sys.shrinking
    elif evt.key == 'V' or evt.key=='v':
        sys.burst = not sys.burst
    elif evt.key=='R' or evt.key=='r':
        sys.color.x = abs(sys.color.x-1)
    elif evt.key=='G' or evt.key=='g':
        sys.color.y = abs(sys.color.y-1)
    elif evt.key=='B' or evt.key=='b':
        sys.color.z = abs(sys.color.z-1)

# Read the file
infile = environ.get("INFILE", "infile")
fp = open(infile)
sys=System(fp)
keyframes = Keyframes(True)
keyframes.readFile(fp)
fp.close()

# Set up the keyframing for the system
pos = CatmullRomPosition(keyframes)
pos.output_slot.connect( sys.pos_slot )

scale = 10.0
# Lights
GLPointLight( pos = vec3(2,3,4)*scale, intensity=0.8 )
GLPointLight( pos = vec3(2,-3,1)*scale, intensity=0.8 )

# Camera
cam = TargetCamera(
    pos    = vec3(0,0,10)*scale,
    target = vec3(0,0,1)*scale,
    fov=90
)

# Action
eventmanager.eventManager().connect(STEP_FRAME, lambda:sys.tick())
eventmanager.eventManager().connect(KEY_PRESS, keypress)