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#
# Code under the MIT license by Alexander Pruss
#
#
# python grenade.py [speed [gravity]]
#
# Throws a grenade with the specified speed in m/s (default: 15) and specified
# gravitational acceleration (default: earth) in m/s^2 or given by listing a planet,
# sun, moon or pluto.
#
from mc import *
from vehicle import *
import time
import sys
GRAVITIES = {
'sun':274,
'mercury':3.59,
'venus':8.87,
'earth':9.81,
'moon':1.62,
'mars':3.77,
'jupiter':25.95,
'saturn':11.08,
'uranus':10.67,
'neptune':14.07,
'pluto':0.42
}
def getPath(center, azi, alt, v0):
vx = v0 * cos(alt) * sin(-azi)
vy = v0 * sin(alt)
vz = v0 * cos(alt) * cos(-azi)
t = 0
x = center.x + cos(alt) * sin(-azi) * 2
y = center.y + sin(alt) * 2 + 2
z = center.z + cos(alt) * cos(-azi) * 2
path = [(t,Vec3(round(x),round(y),round(z)))]
while not mc.getBlock(x,y,z):
v = sqrt(vx*vx+vy*vy+vz*vz)
if v < 1:
dt = 0.5
else:
dt = 0.5/v
v1x = vx
v1y = vy - g * dt
v1z = vz
x += (vx+v1x)/2 * dt
y += (vy+v1y)/2 * dt
z += (vz+v1z)/2 * dt
vx = v1x
vy = v1y
vz = v1z
t += dt
path.append( ( t,Vec3(round(x),round(y),round(z)) ) )
return path
def getXYZ(path, t1):
for t,xyz in path:
if t1<=t:
return xyz
return path[-1][1]
mc = Minecraft()
try:
v0 = int(sys.argv[1])
except:
v0 = 15
if 3 <= len(sys.argv):
try:
g = float(sys.argv[2])
except:
g = GRAVITIES[sys.argv[2].lower()]
else:
g = GRAVITIES['earth']
center = mc.player.getPos()
azi = mc.player.getRotation() * pi/180.
alt = -mc.player.getPitch() * pi/180.
GRENADE = { (-1,0,0):TNT, (1,0,0):TNT, (0,-1,0):TNT, (0,1,0):TNT, (0,0,1):TNT, (0,0,-1):TNT }
grenade = Vehicle(mc, False)
grenade.setVehicle(GRENADE)
path = getPath(center, azi, alt, v0)
dictionary = {}
prev = path[0][1]
grenade.draw(prev.x,prev.y,prev.z)
t0 = time.time()
while True:
t = time.time() - t0
pos = getXYZ(path,t)
grenade.moveTo(pos.x,pos.y,pos.z)
prev=pos
time.sleep(0.1)
if t > path[-1][0]:
break
mc.setBlock(path[-1][1],FIRE)
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